US20080095638A1 - Controller for a motor and a method of controlling the motor - Google Patents
Controller for a motor and a method of controlling the motor Download PDFInfo
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- US20080095638A1 US20080095638A1 US11/549,518 US54951806A US2008095638A1 US 20080095638 A1 US20080095638 A1 US 20080095638A1 US 54951806 A US54951806 A US 54951806A US 2008095638 A1 US2008095638 A1 US 2008095638A1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
- F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
- F04D15/0254—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being speed or load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
Definitions
- the invention relates to a controller for a motor, and particularly, a controller for a motor operating a pump.
- the main drain can become obstructed with an object, such as a towel or pool toy.
- an object such as a towel or pool toy.
- suction force of the pump is applied to the obstruction and the object sticks to the drain. This is called suction entrapment.
- the object substantially covers the drain (such as a towel covering the drain)
- water is pumped out of the drain side of the pump.
- the seals burn out, and the pump can be damaged.
- Mechanical entrapment occurs when an object, such as a towel or pool toy, gets tangled in the drain cover. Mechanical entrapment may also effect the operation of the pump.
- SVRS Safety Vacuum Release Systems
- SVRS often contain several layers of protection to help prevent both mechanical and suction entrapment.
- Most SVRS use hydraulic release valves that are plumbed into the suction side of the pump. The valve is designed to release (open to the atmosphere) if the vacuum (or pressure) inside the drain pipe exceeds a set threshold, thus releasing the obstruction. These valves can be very effective at releasing the suction developed under these circumstances. Unfortunately, they have several technical problems that have limited their use.
- the invention provides a pumping apparatus for a jetted-fluid system having a vessel for holding a fluid, a drain, and a return.
- the pumping apparatus is connected to a power source and includes a pump having an inlet connectable to the drain, and an outlet connectable to the return.
- the pump is adapted to receive the fluid from the drain and jet fluid through the return.
- the pumping apparatus also includes a motor coupled to the pump to operate the pump, a sensor configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor.
- the pumping apparatus also includes a microcontroller coupled to the sensor and the switch.
- the microcontroller includes a model observer configured to receive a first value based on the signal and to generate a second value representative of at least one of a modeled flow or a modeled pressure based on the first value.
- the microcontroller is configured to control the motor based on the second value.
- the invention provides a pumping apparatus for a jetted-fluid system having a vessel for holding a fluid, a drain, and a return.
- the pumping apparatus is connected to a power source and includes a pump having an inlet connectable to the drain, and an outlet connectable to the return.
- the pump is adapted to receive the fluid from the drain and jet fluid through the return.
- the pumping apparatus also includes a motor coupled to the pump to operate the pump, a sensor configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor.
- the pumping apparatus also includes a microcontroller coupled to the sensor and the switch.
- the microcontroller includes a model observer configured to receive a first value based on the signal and to generate a second value representative of a modeled pressure based on the first value.
- the microcontroller is configured to control the motor based on the second value.
- the invention provides a method of controlling a motor operating a pumping apparatus of a jetted fluid system having a vessel for holding a fluid, a drain, and a return.
- the pumping apparatus includes a pump having an inlet connectable to the drain, and an outlet connectable to the return.
- the pump is adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump.
- the method includes determining a power of the pump motor, applying the power to a model observer, and obtaining a value representative of a flow based on the power and the model observer.
- the method also includes determining whether the value indicates a condition of the pump, and controlling the motor to operate the pump based on the condition of the pump.
- the invention provides a method of controlling a motor operating a pumping apparatus of a jetted fluid system having a vessel for holding a fluid, a drain, and a return.
- the pumping apparatus includes a pump with an inlet connectable to the drain, and an outlet connectable to the return.
- the pump adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump.
- the method includes determining a power of the pump motor, applying the power to a model observer, and obtaining a value representative of a pressure based on the power and the model observer.
- the method also includes determining whether the value indicates a condition of the pump, and controlling the motor to operate the pump based on the condition of the pump.
- the invention provides a method of controlling a fluid-movement system having a motor and a pump.
- the motor is coupled to the pump to operate the pump.
- the method includes calibrating the system to obtain a calibration value for a motor parameter, obtaining a relationship between the motor parameter and a fluid parameter, and determining a trip value based on the calibration value and the relationship.
- the method also includes controlling the motor to operate the pump, and monitoring the operation of the pump.
- the monitoring act includes determining a value for the motor parameter, comparing the value to the trip value, and determining whether the comparison indicates a condition of the pump.
- the method of controlling the fluid-movement system also includes controlling the motor to operate the pump based on the condition of the pump.
- the invention provides a method of controlling a fluid-movement system having a motor and a pump.
- the motor is coupled to the pump to operate the pump.
- the method includes determining a relationship between an input power to the motor and a flow rate through the pump, determining a calibration value for the input power, and determining a percentage drop for the relationship.
- the method also includes determining a trip value based on the relationship, the calibration value, and the percentage drop, and monitoring the operation of the pump.
- the monitoring act includes determining a first value for the input power, comparing the first value to the trip value, and determining whether the first value indicates a condition of the pump.
- the method of controlling the fluid-movement system also includes controlling the motor to operate the pump based on the condition of the pump.
- FIG. 1 is a schematic representation of a jetted-spa incorporating the invention.
- FIG. 2 is a block diagram of a first controller capable of being used in the jetted-spa shown in FIG. 1 .
- FIGS. 3A and 3B are electrical schematics of the first controller shown in FIG. 2 .
- FIG. 4 is a block diagram of a second controller capable of being used in the jetted-spa shown in FIG. 1 .
- FIGS. 5A and 5B are electrical schematics of the second controller shown in FIG. 4 .
- FIG. 6 is a block diagram of a third controller capable of being used in the jetted-spa shown in FIG. 1 .
- FIG. 7 is a graph showing an input power signal and a derivative power signal as a function of time.
- FIG. 8 is a flow diagram illustrating a model observer.
- FIG. 9 is a graph showing an input power signal and a processed power signal as a function of time.
- FIG. 10 is a graph showing an average input power signal and a threshold value reading as a function of time.
- FIG. 11 is a graph showing characterization data and fluid pressure data as a function of flow rate.
- FIG. 12 is a chart showing a numeric relationship between input power and torque.
- FIG. 1 schematically represents a jetted-spa 100 incorporating the invention.
- the invention is not limited to the jetted-spa 100 and can be used in other jetted-fluid systems (e.g., pools, whirlpools, jetted-tubs, etc.). It is also envisioned that the invention can be used in other applications (e.g., fluid-pumping applications).
- the spa 100 includes a vessel 105 .
- the vessel 105 is a hollow container such as a tub, pool, tank, or vat that holds a load.
- the load includes a fluid, such as chlorinated water, and may include one or more occupants or items.
- the spa further includes a fluid-movement system 110 coupled to the vessel 105 .
- the fluid-movement system 110 includes a drain 115 , a pumping apparatus 120 having an inlet 125 coupled to the drain and an outlet 130 , and a return 135 coupled to the outlet 130 of the pumping apparatus 120 .
- the pumping apparatus 120 includes a pump 140 , a motor 145 coupled to the pump 140 , and a controller 150 for controlling the motor 145 .
- the pump 140 is a centrifugal pump and the motor 145 is an induction motor (e.g., capacitor-start, capacitor-run induction motor; split-phase induction motor; three-phase induction motor; etc.).
- the invention is not limited to this type of pump or motor.
- a brushless, direct current (DC) motor may be used in a different pumping application.
- a jetted-fluid system can include multiple drains, multiple returns, or even multiple fluid movement systems.
- the vessel 105 holds a fluid.
- the pump 140 causes the fluid to move from the drain 115 , through the pump 140 , and jet into the vessel 105 .
- This pumping operation occurs when the controller 150 controllably provides a power to the motor 145 , resulting in a mechanical movement by the motor 145 .
- the coupling of the motor 145 e.g., a direct coupling or an indirect coupling via a linkage system
- the operation of the controller 150 can be via an operator interface, which may be as simple as an ON switch.
- FIG. 2 is a block diagram of a first construction of the controller 150
- FIGS. 3A and 3B are electrical schematics of the controller 150 .
- the controller 150 is electrically connected to a power source 155 and the motor 145 .
- the controller 150 includes a power supply 160 .
- the power supply 160 includes resistors R 46 and R 56 ; capacitors C 13 , C 14 , C 16 , C 18 , C 19 , and C 20 ; diodes D 10 and D 11 ; zener diodes D 12 and D 13 ; power supply controller U 7 ; regulator U 6 ; and optical switch U 8 .
- the power supply 160 receives power from the power source 155 and provides the proper DC voltage (e.g., ⁇ 5 VDC and ⁇ 12 VDC) for operating the controller 150 .
- the controller 150 monitors motor input power and pump inlet side pressure to determine if a drain obstruction has taken place. If the drain 115 or plumbing is plugged on the suction side of the pump 140 , the pressure on that side of the pump 140 increases. At the same time, because the pump 140 is no longer pumping water, input power to the motor 145 drops. If either of these conditions occur, the controller 150 declares a fault, the motor 145 powers down, and a fault indicator lights.
- a voltage sense and average circuit 165 , a current sense and average circuit 170 , a line voltage sense circuit 175 , a triac voltage sense circuit 180 , and the microcontroller 185 perform the monitoring of the input power.
- One example voltage sense and average circuit 165 is shown in FIG. 3A .
- the voltage sense and average circuit 165 includes resistors R 34 , R 41 , and R 42 ; diode D 9 ; capacitor C 10 ; and operational amplifier U 4 A.
- the voltage sense and average circuit 165 rectifies the voltage from the power source 155 and then performs a DC average of the rectified voltage. The DC average is then fed to the microcontroller 185 .
- the current sense and average circuit 170 includes transformer T 1 and resistor R 45 , which act as a current sensor that senses the current applied to the motor.
- the current sense and average circuit also includes resistors R 25 , R 26 , R 27 , R 28 , and R 33 ; diodes D 7 and D 8 ; capacitor C 9 ; and operational amplifiers U 4 C and U 4 D, which rectify and average the value representing the sensed current.
- the resultant scaling of the current sense and average circuit 170 can be a negative five to zero volt value corresponding to a zero to twenty-five amp RMS value.
- the resulting DC average is then fed to the microcontroller 185 .
- the line voltage sense circuit 175 includes resistors R 23 , R 24 , and R 32 ; diode D 5 ; zener diode D 6 ; transistor Q 6 ; and NAND gate U 2 B.
- the line voltage sense circuit 175 includes a zero-crossing detector that generates a pulse signal.
- the pulse signal includes pulses that are generated each time the line voltage crosses zero volts.
- the triac voltage sense circuit 180 includes resistors R 1 , R 5 , and R 6 ; diode D 2 ; zener diode D 1 ; transistor Q 1 ; and NAND gate U 2 A.
- the triac voltage sense circuit includes a zero-crossing detector that generates a pulse signal.
- the pulse signal includes pulses that are generated each time the motor current crosses zero.
- microcontroller 185 that can be used with the invention is a Motorola brand microcontroller, model no. MC68HC908QY4CP.
- the microcontroller 185 includes a processor and a memory.
- the memory includes software instructions that are read, interpreted, and executed by the processor to manipulate data or signals.
- the memory also includes data storage memory.
- the microcontroller 185 can include other circuitry (e.g., an analog-to-digital converter) necessary for operating the microcontroller 185 .
- the microcontroller 185 receives inputs (signals or data), executes software instructions to analyze the inputs, and generates outputs (signals or data) based on the analyses.
- microcontroller 185 is shown and described, the functions of the microcontroller 185 can be implemented with other devices, including a variety of integrated circuits (e.g., an application-specific-integrated circuit), programmable devices, and/or discrete devices, as would be apparent to one of ordinary skill in the art. Additionally, it is envisioned that the microcontroller 185 or similar circuitry can be distributed among multiple microcontrollers 185 or similar circuitry. It is also envisioned that the microcontroller 185 or similar circuitry can perform the function of some of the other circuitry described (e.g., circuitry 165 - 180 ) above for the controller 150 .
- the microcontroller 185 in some constructions, can receive a sensed voltage and/or sensed current and determine an averaged voltage, an averaged current, the zero-crossings of the sensed voltage, and/or the zero crossings of the sensed current.
- the microcontroller 185 receives the signals representing the average voltage applied to the motor 145 , the average current through the motor 145 , the zero crossings of the motor voltage, and the zero crossings of the motor current. Based on the zero crossings, the microcontroller 185 can determine a power factor. The power factor can be calculated using known mathematical equations or by using a lookup table based on the mathematical equations. The microcontroller 185 can then calculate a power with the averaged voltage, the averaged current, and the power factor as is known. As will be discussed later, the microcontroller 185 compares the calculated power with a power calibration value to determine whether a fault condition (e.g., due to an obstruction) is present.
- a fault condition e.g., due to an obstruction
- a pressure (or vacuum) sensor circuit 190 and the microcontroller 185 monitor the pump inlet side pressure.
- One example pressure sensor circuit 190 is shown in FIG. 3A .
- the pressure sensor circuit 190 includes resistors R 16 , R 43 , R 44 , R 47 , and R 48 ; capacitors C 8 , C 12 , C 15 , and C 17 ; zener diode D 4 , piezoresistive sensor U 9 , and operational amplifier U 4 -B.
- the piezoresistive sensor U 9 is plumbed into the suction side of the pump 140 .
- the pressure sensor circuit 190 and microcontroller 185 translate and amplify the signal generated by the piezoresistive sensor U 9 into a value representing inlet pressure. As will be discussed later, the microcontroller 185 compares the resulting pressure value with a pressure calibration value to determine whether a fault condition (e.g., due to an obstruction) is present.
- a fault condition e.g., due to an obstruction
- the calibrating of the controller 150 occurs when the user activates a calibrate switch 195 .
- One example calibrate switch 195 is shown in FIG. 3A .
- the calibrate switch 195 includes resistor R 18 and Hall effect switch U 10 .
- the switch 195 When a magnet passes Hall effect switch U 10 , the switch 195 generates a signal provided to the microcontroller 185 .
- the microcontroller 185 Upon receiving the signal, the microcontroller 185 stores a pressure calibration value for the pressure sensor by acquiring the current pressure and stores a power calibration value for the motor by calculating the present power.
- the controller 150 controllably provides power to the motor 145 .
- the controller 150 includes a retriggerable pulse generator circuit 200 .
- the retriggerable pulse generator circuit 200 includes resistor R 7 , capacitor C 1 , and pulse generator U 1 A, and outputs a value to NAND gate U 2 D if the retriggerable pulse generator circuit 200 receives a signal having a pulse frequency greater than a set frequency determined by resistor R 7 and capacitor C 1 .
- the NAND gate U 2 D also receives a signal from power-up delay circuit 205 , which prevents nuisance triggering of the relay on startup.
- the output of the NAND gate U 2 D is provided to relay driver circuit 210 .
- the relay driver circuit 210 shown in FIG. 3A includes resistors R 19 , R 20 , R 21 , and R 22 ; capacitor C 7 ; diode D 3 ; and switches Q 5 and Q 4 .
- the relay driver circuit 210 controls relay K 1 .
- the microcontroller 185 also provides an output to triac driver circuit 215 , which controls triac Q 2 .
- the triac driver circuit 215 includes resistors R 12 , R 13 , and R 14 ; capacitor C 11 ; and switch Q 3 .
- relay K 1 needs to close and triac Q 2 needs to be triggered on.
- the controller 150 also includes a thermoswitch S 1 for monitoring the triac heat sink, a power supply monitor 220 for monitoring the voltages produced by the power supply 160 , and a plurality of LEDs DS 1 , DS 2 , and DS 3 for providing information to the user.
- a green LED DS 1 indicates power is applied to the controller 150
- a red LED DS 2 indicates a fault has occurred
- a third LED DS 3 is a heartbeat LED to indicate the microcontroller 185 is functioning.
- other interfaces can be used for providing information to the operator.
- the system 110 may have to draw air out of the suction side plumbing and get the fluid flowing smoothly.
- This “priming” period usually lasts only a few seconds, but could last a minute or more if there is a lot of air in the system.
- the water flow, suction side pressure, and motor input power remain relatively constant. It is during this normal running period that the circuit is effective at detecting an abnormal event.
- the microcontroller 185 includes a startup-lockout feature that keeps the monitor from detecting the abnormal conditions during the priming period.
- the spa operator can calibrate the controller 150 to the current spa running conditions.
- the calibration values are stored in the microcontroller 185 memory, and will be used as the basis for monitoring the spa 100 . If for some reason the operating conditions of the spa change, the controller 150 can be re-calibrated by the operator. If at any time during normal operations, however, the suction side pressure increases substantially (e.g., 12%) over the pressure calibration value, or the motor input power drops (e.g., 12%) under the power calibration value, the pump will be powered down and a fault indicator is lit.
- the controller 150 measures motor input power, and not just motor power factor or input current. Some motors have electrical characteristics such that power factor remains constant while the motor is unloaded. Other motors have an electrical characteristic such that current remains relatively constant when the pump is unloaded. However, the input power drops on pump systems when the drain is plugged, and water flow is impeded.
- the voltage sense and average circuit 165 generates a value representing the average power line voltage and the current sense and average circuit 170 generates a value representing the average motor current.
- Motor power factor is derived from the difference between power line zero crossing events and triac zero crossing events.
- the line voltage sense circuit 175 provides a signal representing the power line zero crossings.
- the triac zero crossings occur at the zero crossings of the motor current.
- the triac voltage sense circuit 180 provides a signal representing the triac zero crossings.
- the time difference from the zero crossing events is used to look up the motor power factor from a table stored in the microcontroller 185 . This data is then used to calculate the motor input power using equation e1.
- V avg *I avg *PF Motor_Input_Power [e1]
- the calculated motor_input_power is then compared to the calibrated value to determine whether a fault has occurred. If a fault has occurred, the motor is powered down and the fault LED DS 2 is lit.
- FIG. 4 is a block diagram of a second construction of the controller 150 a
- FIGS. 5A and 5B are an electrical schematic of the controller 150 a .
- the controller 150 a is electrically connected to a power source 155 and the motor 145 .
- the controller 150 a includes a power supply 160 a .
- the power supply 160 a includes resistors R 54 , R 56 and R 76 ; capacitors C 16 , C 18 , C 20 , C 21 , C 22 , C 23 and C 25 ; diodes D 8 , D 10 and D 11 ; zener diodes D 6 , D 7 and D 9 ; power supply controller U 11 ; regulator U 9 ; inductors L 1 and L 2 , surge suppressors MOV 1 and MOV 2 , and optical switch U 10 .
- the power supply 160 a receives power from the power source 155 and provides the proper DC voltage (e.g., +5 VDC and +12 VDC) for operating the controller 150 a.
- the controller 150 a monitors motor input power to determine if a drain obstruction has taken place. Similar to the earlier disclosed construction, if the drain 115 or plumbing is plugged on the suction side of the pump 140 , the pump 140 will no longer be pumping water, and input power to the motor 145 drops. If this condition occurs, the controller 150 a declares a fault, the motor 145 powers down, and a fault indicator lights.
- a voltage sense and average circuit 165 a , a current sense and average circuit 170 a , and the microcontroller 185 a perform the monitoring of the input power.
- One example voltage sense and average circuit 165 a is shown in FIG. 5A .
- the voltage sense and average circuit 165 a includes resistors R 2 , R 31 , R 34 , R 35 , R 39 , R 59 , R 62 , and R 63 ; diodes D 2 and D 12 ; capacitor C 14 ; and operational amplifiers U 5 C and U 5 D.
- the voltage sense and average circuit 165 a rectifies the voltage from the power source 155 and then performs a DC average of the rectified voltage. The DC average is then fed to the microcontroller 185 a .
- the voltage sense and average circuit 165 a further includes resistors R 22 , R 23 , R 27 , R 28 , R 30 , and R 36 ; capacitor C 27 ; and comparator U 7 A; which provide the sign of the voltage waveform (i.e., acts as a zero-crossing detector) to the microcontroller 185 a.
- the current sense and average circuit 170 a includes transformer T 1 and resistor R 53 , which act as a current sensor that senses the current applied to the motor 145 .
- the current sense and average circuit 170 a also includes resistors R 18 , R 20 , R 21 , R 40 , R 43 , and R 57 ; diodes D 3 and D 4 ; capacitor C 8 ; and operational amplifiers U 5 A and U 5 B, which rectify and average the value representing the sensed current.
- the resultant scaling of the current sense and average circuit 170 a can be a positive five to zero volt value corresponding to a zero to twenty-five amp RMS value.
- the resulting DC average is then fed to the microcontroller 185 a .
- the current sense and average circuit 170 a further includes resistors R 24 , R 25 , R 26 , R 29 , R 41 , and R 44 ; capacitor C 11 ; and comparator U 7 B; which provide the sign of the current waveform (i.e., acts as a zero-crossing detector) to microcontroller 185 a.
- microcontroller 185 a that can be used with the invention is a Motorola brand microcontroller, model no. MC68HC908QY4CP. Similar to what was discussed for the earlier construction, the microcontroller 185 a includes a processor and a memory. The memory includes software instructions that are read, interpreted, and executed by the processor to manipulate data or signals. The memory also includes data storage memory. The microcontroller 185 a can include other circuitry (e.g., an analog-to-digital converter) necessary for operating the microcontroller 185 a and/or can perform the function of some of the other circuitry described above for the controller 150 a . In general, the microcontroller 185 a receives inputs (signals or data), executes software instructions to analyze the inputs, and generates outputs (signals or data) based on the analyses.
- the microcontroller 185 a receives the signals representing the average voltage applied to the motor 145 , the average current through the motor 145 , the zero crossings of the motor voltage, and the zero crossings of the motor current. Based on the zero crossings, the microcontroller 185 a can determine a power factor and a power as was described earlier. The microcontroller 185 a can then compare the calculated power with a power calibration value to determine whether a fault condition (e.g., due to an obstruction) is present.
- a fault condition e.g., due to an obstruction
- the calibrating of the controller 150 a occurs when the user activates a calibrate switch 195 a .
- One example calibrate switch 195 a is shown in FIG. 5A , which is similar to the calibrate switch 195 shown in FIG. 3A .
- FIG. 5A One example calibrate switch 195 a is shown in FIG. 5A , which is similar to the calibrate switch 195 shown in FIG. 3A .
- other calibrate switches are possible.
- a calibration fob needs to be held near the switch 195 a when the controller 150 a receives an initial power. After removing the magnet and cycling power, the controller 150 a goes through priming and enters an automatic calibration mode (discussed below).
- the controller 150 a controllably provides power to the motor 145 .
- the controller 150 a includes a retriggerable pulse generator circuit 200 a .
- the retriggerable pulse generator circuit 200 a includes resistors R 15 and R 16 , capacitors C 2 and C 6 , and pulse generators U 3 A and U 3 B, and outputs a value to the relay driver circuit 210 a if the retriggerable pulse generator circuit 200 a receives a signal having a pulse frequency greater than a set frequency determined by resistors R 15 and R 16 , and capacitors C 2 and C 6 .
- the retriggerable pulse generators U 3 A and U 3 B also receive a signal from power-up delay circuit 205 a , which prevents nuisance triggering of the relays on startup.
- the relay driver circuits 210 a shown in FIG. 5A include resistors R 1 , R 3 , R 47 , and R 52 ; diodes D 1 and D 5 ; and switches Q 1 and Q 2 .
- the relay driver circuits 210 a control relays K 1 and K 2 . In order for current to flow to the motor, both relays K 1 and K 2 need to “close”.
- the controller 150 a further includes two voltage detectors 212 a and 214 a .
- the first voltage detector 212 a includes resistors R 71 , R 72 , and R 73 ; capacitor C 26 ; diode D 14 ; and switch Q 4 .
- the first voltage detector 212 a detects when voltage is present across relay K 1 , and verifies that the relays are functioning properly before allowing the motor to be energized.
- the second voltage detector 214 a includes resistors R 66 , R 69 , and R 70 ; capacitor C 9 ; diode D 13 ; and switch Q 3 .
- the second voltage detector 214 a senses if a two speed motor is being operated in high or low speed mode.
- the motor input power trip values are set according to what speed the motor is being operated. It is also envisioned that the controller 150 a can be used with a single speed motor without the second voltage detector 214 a (e.g., controller 150 b is shown in FIG. 6 ).
- the controller 150 a also includes an ambient thermal sensor circuit 216 a for monitoring the operating temperature of the controller 150 a , a power supply monitor 220 a for monitoring the voltages produced by the power supply 160 a , and a plurality of LEDs DS 1 and DS 3 for providing information to the user.
- a green LED DS 2 indicates power is applied to the controller 150 a
- a red LED DS 3 indicates a fault has occurred.
- other interfaces can be used for providing information to the operator.
- the controller 150 a further includes a clean mode switch 218 a , which includes switch U 4 and resistor R 10 .
- the clean mode switch can be actuated by an operator (e.g., a maintenance person) to deactivate the power monitoring function described herein for a time period (e.g., 30 minutes so that maintenance person can clean the vessel 105 ).
- a time period e.g. 30 minutes so that maintenance person can clean the vessel 105 .
- the red LED DS 3 can be used to indicate that controller 150 a is in a clean mode. After the time period, the controller 150 a returns to normal operation.
- the maintenance person can actuate the clean mode switch 218 a for the controller 150 a to exit the clean mode before the time period is completed.
- deactivate mode In some cases, it may be desirable to deactivate the power monitoring function for reasons other than performing cleaning operations on the vessel 105 . Such cases may be referred as “deactivate mode”, “disabled mode”, “unprotected mode”, or the like. Regardless of the name, this later mode of operation can be at least partially characterized by the instructions defined under the clean mode operation above. Moreover, when referring to the clean mode and its operation herein, the discussion also applies to these later modes for deactivating the power monitoring function and vice versa.
- the normal sequence of events for one method of operation of the controller 150 a , some of which may be similar to the method of operation of the controller 150 .
- the system 110 may have to prime (discussed above) the suction side plumbing and get the fluid flowing smoothly (referred to as “the normal running period”). It is during the normal running period that the circuit is most effective at detecting an abnormal event.
- the system 110 can enter a priming period.
- the priming period can be preset for a time duration (e.g., a time duration of 3 minutes), or for a time duration determined by a sensed condition.
- the system 110 enters the normal running period.
- the controller 150 a can include instructions to perform an automatic calibration to determine one or more calibration values after a first system power-up.
- One example calibration value is a power calibration value.
- the power calibration value is an average of monitored power values over a predetermined period of time.
- the power calibration value is stored in the memory of the microcontroller 185 , and will be used as the basis for monitoring the vessel 105 .
- the controller 150 a can be re-calibrated by the operator.
- the operator actuates the calibrate switch 195 a to erase the existing one or more calibration values stored in the memory of the microcontroller 185 .
- the operator then powers down the system 110 , particularly the motor 145 , and performs a system power-up.
- the system 110 starts the automatic calibration process as discussed above to determine new one or more calibration values. If at any time during normal operation, the monitored power varies from the power calibration value (e.g., varies from a 12.5% window around the power calibration value), the motor 145 will be powered down and the fault LED DS 3 is lit.
- the automatic calibration instructions include not monitoring the power of the motor 145 during a start-up period, generally preset for a time duration (e.g., 2 seconds), upon the system power-up.
- a time duration e.g. 2 seconds
- the system 110 enters the prime period, upon completion of the start-up period, and the power of the motor 145 is monitored to determine the power calibration value.
- the power calibration value is stored in the memory of the microcontroller 185 .
- the system 110 enters the normal running period. In subsequent system power-ups, the monitored power is compared against the power calibration value stored in the memory of the microcontroller 185 memory during the priming period.
- the system 110 enters the normal running period when the monitored power rises above the power calibration value during the priming period. In some cases, the monitored power does not rise above the power calibration value within the 3 minutes of the priming period. As a consequence, the motor 145 is powered down and a fault indicator is lit.
- the priming period of the automatic calibration can include a longer preset time duration (for example, 4 minutes) or an adjustable time duration capability.
- the controller 150 a can include instructions to perform signal conditioning operations to the monitored power.
- the controller 150 a can include instructions to perform an IIR filter to condition the monitored power.
- the IIR filter can be applied to the monitored power during the priming period and the normal operation period. In other cases, the IIR filter can be applied to the monitored power upon determining the power calibration value after the priming period.
- the controller 150 a measures motor input power, and not just motor power factor or input current. However, it is envisioned that the controllers 150 or 150 a can be modified to monitor other motor parameters (e.g., only motor current, only motor power factor, or motor speed). But motor input power is the preferred motor parameter for controller 150 a for determining whether the water is impeded. Also, it is envisioned that the controller 150 a can be modified to monitor other parameters (e.g., suction side pressure) of the system 110 .
- the microcontroller 185 a monitors the motor input power for an over power condition in addition to an under power condition.
- the monitoring of an over power condition helps reduce the chance that controller 150 a was incorrectly calibrated, and/or also helps detect when the pump is over loaded (e.g., the pump is moving too much fluid).
- the voltage sense and average circuit 165 a generates a value representing the averaged power line voltage and the current sense and average circuit 170 a generates a value representing the averaged motor current.
- Motor power factor is derived from the timing difference between the sign of the voltage signal and the sign of the current signal. This time difference is used to look up the motor power factor from a table stored in the microcontroller 185 a .
- the averaged power line voltage, the averaged motor current, and the motor power factor are then used to calculate the motor input power using equation e1 as was discussed earlier.
- the calculated motor input power is then compared to the calibrated value to determine whether a fault has occurred. If a fault has occurred, the motor is powered down and the fault indicator is lit.
- Redundancy is also used for the power switches of the controller 150 a .
- Two relays K 1 and K 2 are used in series to do this function. This way, a failure of either component will still leave one switch to turn off the motor 145 .
- the proper operation of both relays is checked by the microcontroller 185 a every time the motor 145 is powered-on via the relay voltage detector circuit 212 a.
- the microcontroller 185 a provides pulses at a frequency greater than a set frequency (determined by the retriggerable pulse generator circuits) to close the relays K 1 and K 2 . If the pulse generators U 3 A and U 3 B are not triggered at the proper frequency, the relays K 1 and K 2 open and the motor powers down.
- the microcontroller 185 , 185 a can calculate an input power based on parameters such as averaged voltage, averaged current, and power factor. The microcontroller 185 , 185 a then compares the calculated input power with the power calibration value to determine whether a fault condition (e.g., due to an obstruction) is present.
- Other constructions can include variations of the microcontroller 185 , 185 a and the controller 150 , 150 a operable to receive other parameters and determine whether a fault condition is present.
- the microcontroller 185 , 185 a can monitor the change of input power over a predetermine period of time. More specifically, the microcontroller 185 , 185 a determines and monitors a power derivative value equating about a change in input power divided by a change in time. In cases where the power derivative traverses a threshold value, the controller 150 , 150 a controls the motor 145 to shut down the pump 140 . This aspect of the controller 150 , 150 a may be operable in replacement of, or in conjunction with, other similar aspects of the controller 150 , 150 a , such as shutting down the motor 145 when the power level of the motor 145 traverses a predetermined value.
- FIG. 7 shows a graph indicating input power and power derivative as functions of time. More specifically, FIG. 7 shows a power reading (line 300 ) and a power derivate value (line 305 ), over a 30-second time period, of a motor 145 calibrated at a power threshold value of 5000 and a power derivative threshold of ⁇ 100.
- a water blockage in the fluid-movement system 110 (shown in FIG. 1 ) occurs at the 20-second mark. It can be observed from FIG. 7 that the power reading 300 indicates a power level drop below the threshold value of 5000 at the 27-second mark, causing the controller 150 , 150 a to shut down the pump 140 approximately at the 28-second mark.
- the power derivative value 305 drops below the ⁇ 100 threshold value at the 22-second mark, causing the controller 150 , 150 a to shut down the pump 140 approximately at the 23-second mark.
- Other parameters of the motor 145 e.g., torque
- the microcontroller 185 , 185 a can include instructions that correspond to a model observer, such as the exemplary model observer 310 shown in FIG. 8 .
- the model observer 310 includes a first filter 315 , a regulator 325 having a variable gain 326 and a transfer function 327 , a fluid system model 330 having a gain parameter (shown in FIG. 8 with the value of 1), and a second filter 335 .
- the fluid system model 330 is configured to simulate the fluid-movement system 110 .
- the first filter 315 and the second filter 335 can include various types of analog and digital filters such as, but not limited to, low pass, high pass, band pass, anti-aliasing, IIR, and/or FIR filters.
- a fluid system model may be defined utilizing various procedures.
- a model may be generated for this particular aspect of the controller 150 , 150 a from another model corresponding to a simulation of another system, which may not necessarily be a fluid system.
- a model may be generated solely based on controls knowledge of closed loop or feed back systems and formulas for fluid flow and power.
- a model may be generated by experimentation with a prototype of the fluid system to be modeled.
- the first filter 315 receives a signal (P) corresponding to a parameter of the motor 145 determined and monitored by the microcontroller 185 , 185 a (e.g., input power, torque, current, power factor, etc.).
- P a parameter of the motor 145 determined and monitored by the microcontroller 185 , 185 a
- the first filter 315 is configured to substantially eliminate the noise in the received signal (P), thus generating a filtered signal (PA).
- the first filter 315 may perform other functions such as anti-aliasing or filtering the received signal to a predetermined frequency range.
- the filtered signal (PA) enters a feed-back loop 340 of the model observer 310 and is processed by the regulator 325 .
- the regulator 325 outputs a regulated signal (ro) related to the fluid flow and/or pressure through the fluid-movement system 110 based on the monitored parameter.
- the regulated signal can be interpreted as a modeled flow rate or modeled pressure.
- the fluid system model 330 processes the regulated signal (ro) to generate a model signal (Fil), which is compared to the filtered signal (PA) through the feed-back loop 340 .
- the regulated signal (ro) is also fed to the second filter 335 generating a control signal (roP), which is subsequently used by the microcontroller 185 , 185 a to at least control the operation of the motor 145 .
- the regulated signal (ro), indicative of fluid flow and/or pressure is related to the monitored parameter as shown in equation [e2].
- equation [e2] allows a user to control the motor 145 based on a direct relationship between the input power or torque and a parameter of the fluid flow, such as flow rate and pressure, without having to directly measure the fluid flow parameter.
- FIG. 9 is a graph showing an input power (line 345 ) and a processed power or flow unit (line 350 ) as functions of time. More specifically, the graph of FIG. 9 illustrates the operation of the fluid-movement system 110 with the motor 145 having a threshold value of 5000. For this particular example, FIG. 9 shows that the pump inlet 125 blocked at the 5-second mark. The input power drops below the threshold mark of 5000, and therefore the controller 150 , 150 a shuts down the pump 140 approximately at the 12.5-second mark. Alternatively, the processed power signal drops below the threshold mark corresponding to 5000 at the 6-second mark, and therefore the controller 150 , 150 a shuts down the pump 140 approximately at the 7-second mark.
- the gain parameter of the fluid system model 330 is set to a value of 1, thereby measuring a unit of pressure with the same scale as the unit of power.
- the user can set the gain parameter at a different value to at least control aspects of the operation of the motor 145 , such as shut down time.
- the microcontroller 185 , 185 a can be configured for determining a floating the threshold value or trip value indicating the parameter reading, such as input power or torque, at which the controller 150 , 150 a shuts down the pump 140 .
- the term “floating” refers to varying or adjusting a signal or value.
- the microcontroller 185 , 185 a continuously adjusts the trip value based on average input power readings, as shown in FIG. 10 . More specifically, FIG.
- FIG. 10 shows a graph indicating an average input power signal (line 355 ) determined and monitored by the microcontroller 185 , 185 a , a trip signal (line 360 ) indicating a variable trip value, and a threshold value of about 4500 (shown in FIG. 10 with arrow 362 ) as a function of time.
- the threshold value 362 is a parameter indicating the minimum value that the trip value can be adjusted to.
- the microcontroller 185 , 185 a may calculate the average input power 355 utilizing various methods.
- the microcontroller 185 , 185 a may determine a running average based at least on signals generated by the current sense and average circuit 170 , 170 a and signals generated by the voltage sense and average circuit 165 , 165 a .
- the microcontroller 185 , 185 a may determine an input power average over relatively short periods of time. As shown in FIG. 10 , the average power determined by the microcontroller 185 , 185 a goes down from about 6000 to about 5000 in a substantially progressive manner over a time period of 80 units of time.
- the signal 360 indicating the trip value is adjusted down to about 10% from the value at the O-time unit mark to the 80-time unit mark and is substantially parallel to the average power 355 . More specifically, the microcontroller 185 , 185 a adjusts the trip value based on monitoring the average input power 355 .
- the average power signal 355 may define a behavior, such as the one shown in FIG. 10 , due to sustained clogging of the fluid-movement system 110 over a period of time, for example from the O-time unit mark to the 80-time unit mark.
- sustained clogging of the fluid-movement system 110 can be determined and monitored by the microcontroller 185 , 185 a in the form of the average power signal 355 .
- the microcontroller 185 , 185 a can also determine a percentage or value indicative of a minimum average input power allowed to be supplied to the motor 145 , or a minimum allowed threshold value such as threshold value 362 .
- the average power signal 355 returns to normal unrestricted fluid flow (shown in FIG. 10 between about the 84-time unit mark and about the 92-time unit mark, for example). As shown in FIG. 10 , unclogging the fluid-movement system 110 can result in relative desired fluid flow through the fluid-movement system 110 . As a consequence, the microcontroller 185 , 185 a senses an average power change as indicated near the 80-time unit mark in FIG. 10 showing as the average power returns to the calibration value.
- the microcontroller 185 , 185 a can determine and monitor the average input power over a relatively short amount of time. For example, the microcontroller 185 , 185 a can monitor the average power over a first time period (e.g., 5 seconds). The controller 185 , 185 a can also determine a variable trip value based on a predetermine percentage (e.g., 6.25%) drop of the average power calculated over the first time period. In other words, the variable trip value is adjusted based on the predetermined percentage as the microcontroller 185 , 185 a determines the average power. The controller 150 , 150 a can shut down the pump 140 when the average power drops to a value substantially equal or lower than the variable trip value and sustains this condition over a second period of time (e.g., 1 second).
- a second period of time e.g., 1 second
- the microcontroller 185 , 185 a can be configured to determine a relationship between a parameter of the motor 145 (such as power or torque) and pressure/flow through the fluid-movement system 110 for a specific motor/pump combination. More specifically, the controller 150 , 150 a controls the motor 145 to calibrate the fluid-movement system 110 based on the environment in which the fluid-movement system 110 operates.
- the environment in which the fluid-movement system 110 operates can be defined by the capacity of the vessel 105 , tubing configuration between the drain 115 and inlet 125 , tubing configuration between outlet 130 and return 135 (shown in FIG. 1 ), number of drains and returns, and other factors not explicitly discussed herein.
- Calibration of the fluid-movement system 110 is generally performed the first time the system is operated after installation. It is to be understood that the processes described herein are also applicable to recalibration procedures.
- calibration of the fluid-movement system 110 includes determining a threshold value based on characterizing a specific motor/pump combination and establishing a relationship between, for example, input power and pressure via a stored look-up table or an equation.
- FIG. 11 shows a chart having characterization data (line 365 ), measured in kilowatts and obtained through a calibration process, and a pump curve (line 370 ) indicating head pressure.
- the characterization data 365 and the pump curve 370 are graphed as a function of flow measured in gallons per minute (GPM).
- characterization data 365 Referring particularly to the characterization data 365 shown in FIG. 11 , if an operating point for the fluid-movement system 110 is determined at point 1 on the characterization data 365 , a 30% reduction in flow from 100 GPM to 70 GPM (point 2 on the characterization data 365 ) through the fluid-movement system 110 is monitored by the microcontroller 185 , 185 a and indicates a 7% reduction in input power.
- the operating set point can be established at point 2 , for example.
- a 30% reduction in flow from 70 GPM to 50 GPM (point 3 on the characterization data 365 ) through the fluid-movement system 110 is monitored by the microcontroller 185 , 185 a and indicates an 11% reduction in power.
- a 30% reduction in flow is a desired operating condition, thus a user (or microcontroller 185 , 185 a ) can establish a trip value or percentage based on the percent reduction (e.g., a reduction of 30% in flow) separate from the determined and monitored power.
- the microcontroller 185 , 185 a can include a timer function to operate the fluid-movement system 110 .
- the timer function of the microcontroller 185 , 185 a implements a RUN mode of the controller 150 , 150 a . More specifically regarding the RUN mode, the controller 150 , 150 a is configured to operate the motor 145 automatically over predetermined periods of time. In other words, the controller 150 , 150 a is configured to control the motor 145 based on predetermined time periods programmed in the microcontroller 185 , 185 a during manufacturing or programmed by a user.
- the timer function of the microcontroller 185 , 185 a implements an OFF mode of the controller 150 , 150 a . More specifically regarding the OFF mode, the controller 150 , 150 a is configured to operate the motor 145 only as a result of direct interaction of the user. In other words, the controller 150 , 150 a is configured to maintain the motor 145 off until a user directly operates the controller 150 , 150 a through the interface of the controller 150 , 150 a . In yet another example, the timer function of the microcontroller 185 , 185 a implements a PROGRAM mode of the controller 150 , 150 a .
- the controller 150 , 150 a is configured to maintain the motor 145 off until the user actuates one of the switches (e.g., calibrate switch 195 , 195 a , clean mode switch 218 a ) of the controller 150 , 150 a indicating a desired one-time window of operation of the motor 145 .
- the user can actuate one switch three times indicating the controller 150 , 150 a to operate the motor 145 for a period of three hours.
- the controller 150 , 150 a includes a run-off-program switch to operate the controller 150 , 150 a between the RUN, OFF, and PROGRAM modes. It is to be understood that the same or other modes of operation of the controller 150 , 150 a can be defined differently. Additionally, not all modes described above are necessary and the controller 150 , 150 a can include a different number and combinations of modes of operation.
- the microcontroller 185 , 185 a can be configured to determine and monitor a value corresponding to the torque of the motor 145 . More specifically, the microcontroller 185 , 185 a receives signals from at least one of the voltage sense and average circuit 165 , 165 a and the current sense and average circuit 170 , 170 a to help determine the torque of the motor 145 . As explained above, the microcontroller 185 , 185 a can also be configured to determine and monitor the speed of the motor 145 , allowing the microcontroller 185 , 185 a to determine a value indicative of the torque of the motor 145 and a relationship between the torque and the input power.
- the speed of the motor 145 remains substantially constant during operation of the motor 145 .
- the microcontroller 185 , 185 a can include instructions related to formulas or look-up tables that indicate a direct relationship between the input power and the torque of the motor 145 . Determining and monitoring the torque of the motor 145 allows the microcontroller 185 , 185 a to establish a trip value or a percentage based on torque to shut off the motor 145 in case of an undesired condition of the motor 145 .
- FIG. 12 shows a chart indicating a relationship between input power and torque for a motor 145 under the observation that the speed of the motor 145 changes less than 2%.
- the microcontroller 185 , 185 a can determine and monitor torque based on input power and under the assumption of constant speed.
- the fluid-movement system 110 can operate two or more vessels 105 .
- the fluid-movement system 110 can include a piping system to control fluid flow to a pool, and a second piping system to control fluid flow to a spa.
- the flow requirements for the pool and the spa are generally different and may define or require separate settings of the controller 150 , 150 a for the controller 150 , 150 a to operate the motor 145 to control fluid flow to the pool, the spa, or both.
- the fluid-movement system 110 can include one or more valves that may be manually or automatically operated to direct fluid flow as desired.
- the fluid-movement system 110 includes one solenoid valve
- a user can operate the valve to direct flow to one of the pool and the spa.
- the controller 150 , 150 a can include a sensor or receiver coupled to the valve to determine the position of the valve. Under the above mentioned conditions, the controller 150 , 150 a can run a calibration sequence and determine individual settings and trip values for the fluid system including the pool, the spa, or both.
- Other constructions can include a different number of vessels 105 , where fluid flow to the number of vessels 105 can be controller by one or more fluid-movement systems 110 .
- controller 150 , 150 a While numerous aspects of the controller 150 , 150 a were discussed above, not all of the aspects and features discussed above are required for the invention. Additionally, other aspects and features can be added to the controller 150 , 150 a shown in the figures.
Abstract
A pumping apparatus for a jetted-fluid system includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return. The apparatus includes a motor coupled to the pump to operate the pump, a sensor configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor. The apparatus also includes a microcontroller coupled to the sensor and the switch. The microcontroller includes a model observer configured to receive a first value based on the signal and to generate a second value representative of at least one of a modeled flow or a modeled pressure based on the first value. The microcontroller is configured to control the motor based on the second value.
Description
- The invention relates to a controller for a motor, and particularly, a controller for a motor operating a pump.
- Occasionally on a swimming pool, spa, or similar jetted-fluid application, the main drain can become obstructed with an object, such as a towel or pool toy. When this happens, the suction force of the pump is applied to the obstruction and the object sticks to the drain. This is called suction entrapment. If the object substantially covers the drain (such as a towel covering the drain), water is pumped out of the drain side of the pump. Eventually the pump runs dry, the seals burn out, and the pump can be damaged.
- Another type of entrapment is referred to as mechanical entrapment. Mechanical entrapment occurs when an object, such as a towel or pool toy, gets tangled in the drain cover. Mechanical entrapment may also effect the operation of the pump.
- Several solutions have been proposed for suction and mechanical entrapment. For example, new pool construction is required to have two drains, so that if one drain becomes plugged, the other can still flow freely and no vacuum entrapment can take place. This does not help existing pools, however, as adding a second drain to an in-ground, one-drain pool is very difficult and expensive. Modern pool drain covers are also designed such that items cannot become entwined with the cover.
- As another example, several manufacturers offer systems known as Safety Vacuum Release Systems (SVRS). SVRS often contain several layers of protection to help prevent both mechanical and suction entrapment. Most SVRS use hydraulic release valves that are plumbed into the suction side of the pump. The valve is designed to release (open to the atmosphere) if the vacuum (or pressure) inside the drain pipe exceeds a set threshold, thus releasing the obstruction. These valves can be very effective at releasing the suction developed under these circumstances. Unfortunately, they have several technical problems that have limited their use.
- In one embodiment, the invention provides a pumping apparatus for a jetted-fluid system having a vessel for holding a fluid, a drain, and a return. The pumping apparatus is connected to a power source and includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return. The pumping apparatus also includes a motor coupled to the pump to operate the pump, a sensor configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor. The pumping apparatus also includes a microcontroller coupled to the sensor and the switch. The microcontroller includes a model observer configured to receive a first value based on the signal and to generate a second value representative of at least one of a modeled flow or a modeled pressure based on the first value. The microcontroller is configured to control the motor based on the second value.
- In another embodiment, the invention provides a pumping apparatus for a jetted-fluid system having a vessel for holding a fluid, a drain, and a return. The pumping apparatus is connected to a power source and includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return. The pumping apparatus also includes a motor coupled to the pump to operate the pump, a sensor configured to generate a signal having a relation to a parameter of the motor, and a switch coupled to the motor and configured to control at least a characteristic of the motor. The pumping apparatus also includes a microcontroller coupled to the sensor and the switch. The microcontroller includes a model observer configured to receive a first value based on the signal and to generate a second value representative of a modeled pressure based on the first value. The microcontroller is configured to control the motor based on the second value.
- In another embodiment, the invention provides a method of controlling a motor operating a pumping apparatus of a jetted fluid system having a vessel for holding a fluid, a drain, and a return. The pumping apparatus includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump. The method includes determining a power of the pump motor, applying the power to a model observer, and obtaining a value representative of a flow based on the power and the model observer. The method also includes determining whether the value indicates a condition of the pump, and controlling the motor to operate the pump based on the condition of the pump.
- In another embodiment, the invention provides a method of controlling a motor operating a pumping apparatus of a jetted fluid system having a vessel for holding a fluid, a drain, and a return. The pumping apparatus includes a pump with an inlet connectable to the drain, and an outlet connectable to the return. The pump adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump. The method includes determining a power of the pump motor, applying the power to a model observer, and obtaining a value representative of a pressure based on the power and the model observer. The method also includes determining whether the value indicates a condition of the pump, and controlling the motor to operate the pump based on the condition of the pump.
- In another embodiment, the invention provides a method of controlling a fluid-movement system having a motor and a pump. The motor is coupled to the pump to operate the pump. The method includes calibrating the system to obtain a calibration value for a motor parameter, obtaining a relationship between the motor parameter and a fluid parameter, and determining a trip value based on the calibration value and the relationship. The method also includes controlling the motor to operate the pump, and monitoring the operation of the pump. The monitoring act includes determining a value for the motor parameter, comparing the value to the trip value, and determining whether the comparison indicates a condition of the pump. The method of controlling the fluid-movement system also includes controlling the motor to operate the pump based on the condition of the pump.
- In another embodiment, the invention provides a method of controlling a fluid-movement system having a motor and a pump. The motor is coupled to the pump to operate the pump. The method includes determining a relationship between an input power to the motor and a flow rate through the pump, determining a calibration value for the input power, and determining a percentage drop for the relationship. The method also includes determining a trip value based on the relationship, the calibration value, and the percentage drop, and monitoring the operation of the pump. The monitoring act includes determining a first value for the input power, comparing the first value to the trip value, and determining whether the first value indicates a condition of the pump. The method of controlling the fluid-movement system also includes controlling the motor to operate the pump based on the condition of the pump.
- Other features and aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
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FIG. 1 is a schematic representation of a jetted-spa incorporating the invention. -
FIG. 2 is a block diagram of a first controller capable of being used in the jetted-spa shown inFIG. 1 . -
FIGS. 3A and 3B are electrical schematics of the first controller shown inFIG. 2 . -
FIG. 4 is a block diagram of a second controller capable of being used in the jetted-spa shown inFIG. 1 . -
FIGS. 5A and 5B are electrical schematics of the second controller shown inFIG. 4 . -
FIG. 6 is a block diagram of a third controller capable of being used in the jetted-spa shown inFIG. 1 . -
FIG. 7 is a graph showing an input power signal and a derivative power signal as a function of time. -
FIG. 8 is a flow diagram illustrating a model observer. -
FIG. 9 is a graph showing an input power signal and a processed power signal as a function of time. -
FIG. 10 is a graph showing an average input power signal and a threshold value reading as a function of time. -
FIG. 11 is a graph showing characterization data and fluid pressure data as a function of flow rate. -
FIG. 12 is a chart showing a numeric relationship between input power and torque. - Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.
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FIG. 1 schematically represents a jetted-spa 100 incorporating the invention. However, the invention is not limited to the jetted-spa 100 and can be used in other jetted-fluid systems (e.g., pools, whirlpools, jetted-tubs, etc.). It is also envisioned that the invention can be used in other applications (e.g., fluid-pumping applications). - As shown in
FIG. 1 , thespa 100 includes avessel 105. As used herein, thevessel 105 is a hollow container such as a tub, pool, tank, or vat that holds a load. The load includes a fluid, such as chlorinated water, and may include one or more occupants or items. The spa further includes a fluid-movement system 110 coupled to thevessel 105. The fluid-movement system 110 includes adrain 115, apumping apparatus 120 having aninlet 125 coupled to the drain and anoutlet 130, and areturn 135 coupled to theoutlet 130 of thepumping apparatus 120. Thepumping apparatus 120 includes apump 140, amotor 145 coupled to thepump 140, and acontroller 150 for controlling themotor 145. For the constructions described herein, thepump 140 is a centrifugal pump and themotor 145 is an induction motor (e.g., capacitor-start, capacitor-run induction motor; split-phase induction motor; three-phase induction motor; etc.). However, the invention is not limited to this type of pump or motor. For example, a brushless, direct current (DC) motor may be used in a different pumping application. For other constructions, a jetted-fluid system can include multiple drains, multiple returns, or even multiple fluid movement systems. - Referring back to
FIG. 1 , thevessel 105 holds a fluid. When thefluid movement system 110 is active, thepump 140 causes the fluid to move from thedrain 115, through thepump 140, and jet into thevessel 105. This pumping operation occurs when thecontroller 150 controllably provides a power to themotor 145, resulting in a mechanical movement by themotor 145. The coupling of the motor 145 (e.g., a direct coupling or an indirect coupling via a linkage system) to thepump 140 results in themotor 145 mechanically operating thepump 140 to move the fluid. The operation of thecontroller 150 can be via an operator interface, which may be as simple as an ON switch. -
FIG. 2 is a block diagram of a first construction of thecontroller 150, andFIGS. 3A and 3B are electrical schematics of thecontroller 150. As shown inFIG. 2 , thecontroller 150 is electrically connected to apower source 155 and themotor 145. - With reference to
FIG. 2 andFIG. 3B , thecontroller 150 includes apower supply 160. Thepower supply 160 includes resistors R46 and R56; capacitors C13, C14, C16, C18, C19, and C20; diodes D10 and D11; zener diodes D12 and D13; power supply controller U7; regulator U6; and optical switch U8. Thepower supply 160 receives power from thepower source 155 and provides the proper DC voltage (e.g., ±5 VDC and ±12 VDC) for operating thecontroller 150. - For the
controller 150 shown inFIGS. 2 and 3A , thecontroller 150 monitors motor input power and pump inlet side pressure to determine if a drain obstruction has taken place. If thedrain 115 or plumbing is plugged on the suction side of thepump 140, the pressure on that side of thepump 140 increases. At the same time, because thepump 140 is no longer pumping water, input power to themotor 145 drops. If either of these conditions occur, thecontroller 150 declares a fault, themotor 145 powers down, and a fault indicator lights. - A voltage sense and
average circuit 165, a current sense andaverage circuit 170, a linevoltage sense circuit 175, a triacvoltage sense circuit 180, and themicrocontroller 185 perform the monitoring of the input power. One example voltage sense andaverage circuit 165 is shown inFIG. 3A . The voltage sense andaverage circuit 165 includes resistors R34, R41, and R42; diode D9; capacitor C10; and operational amplifier U4A. The voltage sense andaverage circuit 165 rectifies the voltage from thepower source 155 and then performs a DC average of the rectified voltage. The DC average is then fed to themicrocontroller 185. - One example current sense and
average circuit 170 is shown inFIG. 3A . The current sense andaverage circuit 170 includes transformer T1 and resistor R45, which act as a current sensor that senses the current applied to the motor. The current sense and average circuit also includes resistors R25, R26, R27, R28, and R33; diodes D7 and D8; capacitor C9; and operational amplifiers U4C and U4D, which rectify and average the value representing the sensed current. For example, the resultant scaling of the current sense andaverage circuit 170 can be a negative five to zero volt value corresponding to a zero to twenty-five amp RMS value. The resulting DC average is then fed to themicrocontroller 185. - One example line
voltage sense circuit 175 is shown inFIG. 3A . The linevoltage sense circuit 175 includes resistors R23, R24, and R32; diode D5; zener diode D6; transistor Q6; and NAND gate U2B. The linevoltage sense circuit 175 includes a zero-crossing detector that generates a pulse signal. The pulse signal includes pulses that are generated each time the line voltage crosses zero volts. - One example triac
voltage sense circuit 180 is shown inFIG. 3A . The triacvoltage sense circuit 180 includes resistors R1, R5, and R6; diode D2; zener diode D1; transistor Q1; and NAND gate U2A. The triac voltage sense circuit includes a zero-crossing detector that generates a pulse signal. The pulse signal includes pulses that are generated each time the motor current crosses zero. - One
example microcontroller 185 that can be used with the invention is a Motorola brand microcontroller, model no. MC68HC908QY4CP. Themicrocontroller 185 includes a processor and a memory. The memory includes software instructions that are read, interpreted, and executed by the processor to manipulate data or signals. The memory also includes data storage memory. Themicrocontroller 185 can include other circuitry (e.g., an analog-to-digital converter) necessary for operating themicrocontroller 185. In general, themicrocontroller 185 receives inputs (signals or data), executes software instructions to analyze the inputs, and generates outputs (signals or data) based on the analyses. Although themicrocontroller 185 is shown and described, the functions of themicrocontroller 185 can be implemented with other devices, including a variety of integrated circuits (e.g., an application-specific-integrated circuit), programmable devices, and/or discrete devices, as would be apparent to one of ordinary skill in the art. Additionally, it is envisioned that themicrocontroller 185 or similar circuitry can be distributed amongmultiple microcontrollers 185 or similar circuitry. It is also envisioned that themicrocontroller 185 or similar circuitry can perform the function of some of the other circuitry described (e.g., circuitry 165-180) above for thecontroller 150. For example, themicrocontroller 185, in some constructions, can receive a sensed voltage and/or sensed current and determine an averaged voltage, an averaged current, the zero-crossings of the sensed voltage, and/or the zero crossings of the sensed current. - The
microcontroller 185 receives the signals representing the average voltage applied to themotor 145, the average current through themotor 145, the zero crossings of the motor voltage, and the zero crossings of the motor current. Based on the zero crossings, themicrocontroller 185 can determine a power factor. The power factor can be calculated using known mathematical equations or by using a lookup table based on the mathematical equations. Themicrocontroller 185 can then calculate a power with the averaged voltage, the averaged current, and the power factor as is known. As will be discussed later, themicrocontroller 185 compares the calculated power with a power calibration value to determine whether a fault condition (e.g., due to an obstruction) is present. - Referring again to
FIGS. 2 and 3A , a pressure (or vacuum)sensor circuit 190 and themicrocontroller 185 monitor the pump inlet side pressure. One examplepressure sensor circuit 190 is shown inFIG. 3A . Thepressure sensor circuit 190 includes resistors R16, R43, R44, R47, and R48; capacitors C8, C12, C15, and C17; zener diode D4, piezoresistive sensor U9, and operational amplifier U4-B. The piezoresistive sensor U9 is plumbed into the suction side of thepump 140. Thepressure sensor circuit 190 andmicrocontroller 185 translate and amplify the signal generated by the piezoresistive sensor U9 into a value representing inlet pressure. As will be discussed later, themicrocontroller 185 compares the resulting pressure value with a pressure calibration value to determine whether a fault condition (e.g., due to an obstruction) is present. - The calibrating of the
controller 150 occurs when the user activates a calibrateswitch 195. One example calibrateswitch 195 is shown inFIG. 3A . The calibrateswitch 195 includes resistor R18 and Hall effect switch U10. When a magnet passes Hall effect switch U10, theswitch 195 generates a signal provided to themicrocontroller 185. Upon receiving the signal, themicrocontroller 185 stores a pressure calibration value for the pressure sensor by acquiring the current pressure and stores a power calibration value for the motor by calculating the present power. - As stated earlier, the
controller 150 controllably provides power to themotor 145. With references toFIGS. 2 and 3A , thecontroller 150 includes a retriggerablepulse generator circuit 200. The retriggerablepulse generator circuit 200 includes resistor R7, capacitor C1, and pulse generator U1A, and outputs a value to NAND gate U2D if the retriggerablepulse generator circuit 200 receives a signal having a pulse frequency greater than a set frequency determined by resistor R7 and capacitor C1. The NAND gate U2D also receives a signal from power-up delay circuit 205, which prevents nuisance triggering of the relay on startup. The output of the NAND gate U2D is provided to relaydriver circuit 210. Therelay driver circuit 210 shown inFIG. 3A includes resistors R19, R20, R21, and R22; capacitor C7; diode D3; and switches Q5 and Q4. Therelay driver circuit 210 controls relay K1. - The
microcontroller 185 also provides an output to triacdriver circuit 215, which controls triac Q2. As shown inFIG. 3A , thetriac driver circuit 215 includes resistors R12, R13, and R14; capacitor C11; and switch Q3. In order for current to flow to the motor, relay K1 needs to close and triac Q2 needs to be triggered on. - The
controller 150 also includes a thermoswitch S1 for monitoring the triac heat sink, apower supply monitor 220 for monitoring the voltages produced by thepower supply 160, and a plurality of LEDs DS1, DS2, and DS3 for providing information to the user. In the construction shown, a green LED DS1 indicates power is applied to thecontroller 150, a red LED DS2 indicates a fault has occurred, and a third LED DS3 is a heartbeat LED to indicate themicrocontroller 185 is functioning. Of course, other interfaces can be used for providing information to the operator. - The following describes the normal sequence of events for one method of operation of the
controller 150. When thefluid movement system 110 is initially activated, thesystem 110 may have to draw air out of the suction side plumbing and get the fluid flowing smoothly. This “priming” period usually lasts only a few seconds, but could last a minute or more if there is a lot of air in the system. After priming, the water flow, suction side pressure, and motor input power remain relatively constant. It is during this normal running period that the circuit is effective at detecting an abnormal event. Themicrocontroller 185 includes a startup-lockout feature that keeps the monitor from detecting the abnormal conditions during the priming period. - After the
system 110 is running smoothly, the spa operator can calibrate thecontroller 150 to the current spa running conditions. The calibration values are stored in themicrocontroller 185 memory, and will be used as the basis for monitoring thespa 100. If for some reason the operating conditions of the spa change, thecontroller 150 can be re-calibrated by the operator. If at any time during normal operations, however, the suction side pressure increases substantially (e.g., 12%) over the pressure calibration value, or the motor input power drops (e.g., 12%) under the power calibration value, the pump will be powered down and a fault indicator is lit. - As discussed earlier, the
controller 150 measures motor input power, and not just motor power factor or input current. Some motors have electrical characteristics such that power factor remains constant while the motor is unloaded. Other motors have an electrical characteristic such that current remains relatively constant when the pump is unloaded. However, the input power drops on pump systems when the drain is plugged, and water flow is impeded. - The voltage sense and
average circuit 165 generates a value representing the average power line voltage and the current sense andaverage circuit 170 generates a value representing the average motor current. Motor power factor is derived from the difference between power line zero crossing events and triac zero crossing events. The linevoltage sense circuit 175 provides a signal representing the power line zero crossings. The triac zero crossings occur at the zero crossings of the motor current. The triacvoltage sense circuit 180 provides a signal representing the triac zero crossings. The time difference from the zero crossing events is used to look up the motor power factor from a table stored in themicrocontroller 185. This data is then used to calculate the motor input power using equation e1. -
V avg *I avg *PF=Motor_Input_Power [e1] - The calculated motor_input_power is then compared to the calibrated value to determine whether a fault has occurred. If a fault has occurred, the motor is powered down and the fault LED DS2 is lit.
-
FIG. 4 is a block diagram of a second construction of thecontroller 150 a, andFIGS. 5A and 5B are an electrical schematic of thecontroller 150 a. As shown inFIG. 4 , thecontroller 150 a is electrically connected to apower source 155 and themotor 145. - With reference to
FIG. 4 andFIG. 5B , thecontroller 150 a includes apower supply 160 a. Thepower supply 160 a includes resistors R54, R56 and R76; capacitors C16, C18, C20, C21, C22, C23 and C25; diodes D8, D10 and D11; zener diodes D6, D7 and D9; power supply controller U11; regulator U9; inductors L1 and L2, surge suppressors MOV1 and MOV2, and optical switch U10. Thepower supply 160 a receives power from thepower source 155 and provides the proper DC voltage (e.g., +5 VDC and +12 VDC) for operating thecontroller 150 a. - For the
controller 150 a shown inFIG. 4 ,FIG. 5A , andFIG. 5B , thecontroller 150 a monitors motor input power to determine if a drain obstruction has taken place. Similar to the earlier disclosed construction, if thedrain 115 or plumbing is plugged on the suction side of thepump 140, thepump 140 will no longer be pumping water, and input power to themotor 145 drops. If this condition occurs, thecontroller 150 a declares a fault, themotor 145 powers down, and a fault indicator lights. - A voltage sense and
average circuit 165 a, a current sense andaverage circuit 170 a, and themicrocontroller 185 a perform the monitoring of the input power. One example voltage sense andaverage circuit 165 a is shown inFIG. 5A . The voltage sense andaverage circuit 165 a includes resistors R2, R31, R34, R35, R39, R59, R62, and R63; diodes D2 and D12; capacitor C14; and operational amplifiers U5C and U5D. The voltage sense andaverage circuit 165 a rectifies the voltage from thepower source 155 and then performs a DC average of the rectified voltage. The DC average is then fed to themicrocontroller 185 a. The voltage sense andaverage circuit 165 a further includes resistors R22, R23, R27, R28, R30, and R36; capacitor C27; and comparator U7A; which provide the sign of the voltage waveform (i.e., acts as a zero-crossing detector) to themicrocontroller 185 a. - One example current sense and
average circuit 170 a is shown inFIG. 5B . The current sense andaverage circuit 170 a includes transformer T1 and resistor R53, which act as a current sensor that senses the current applied to themotor 145. The current sense andaverage circuit 170 a also includes resistors R18, R20, R21, R40, R43, and R57; diodes D3 and D4; capacitor C8; and operational amplifiers U5A and U5B, which rectify and average the value representing the sensed current. For example, the resultant scaling of the current sense andaverage circuit 170 a can be a positive five to zero volt value corresponding to a zero to twenty-five amp RMS value. The resulting DC average is then fed to themicrocontroller 185 a. The current sense andaverage circuit 170 a further includes resistors R24, R25, R26, R29, R41, and R44; capacitor C11; and comparator U7B; which provide the sign of the current waveform (i.e., acts as a zero-crossing detector) tomicrocontroller 185 a. - One
example microcontroller 185 a that can be used with the invention is a Motorola brand microcontroller, model no. MC68HC908QY4CP. Similar to what was discussed for the earlier construction, themicrocontroller 185 a includes a processor and a memory. The memory includes software instructions that are read, interpreted, and executed by the processor to manipulate data or signals. The memory also includes data storage memory. Themicrocontroller 185 a can include other circuitry (e.g., an analog-to-digital converter) necessary for operating themicrocontroller 185 a and/or can perform the function of some of the other circuitry described above for thecontroller 150 a. In general, themicrocontroller 185 a receives inputs (signals or data), executes software instructions to analyze the inputs, and generates outputs (signals or data) based on the analyses. - The
microcontroller 185 a receives the signals representing the average voltage applied to themotor 145, the average current through themotor 145, the zero crossings of the motor voltage, and the zero crossings of the motor current. Based on the zero crossings, themicrocontroller 185 a can determine a power factor and a power as was described earlier. Themicrocontroller 185 a can then compare the calculated power with a power calibration value to determine whether a fault condition (e.g., due to an obstruction) is present. - The calibrating of the
controller 150 a occurs when the user activates a calibrateswitch 195 a. One example calibrateswitch 195 a is shown inFIG. 5A , which is similar to the calibrateswitch 195 shown inFIG. 3A . Of course, other calibrate switches are possible. In one method of operation for the calibrateswitch 195 a, a calibration fob needs to be held near theswitch 195 a when thecontroller 150 a receives an initial power. After removing the magnet and cycling power, thecontroller 150 a goes through priming and enters an automatic calibration mode (discussed below). - The
controller 150 a controllably provides power to themotor 145. With references toFIGS. 4 and 5A , thecontroller 150 a includes a retriggerablepulse generator circuit 200 a. The retriggerablepulse generator circuit 200 a includes resistors R15 and R16, capacitors C2 and C6, and pulse generators U3A and U3B, and outputs a value to therelay driver circuit 210 a if the retriggerablepulse generator circuit 200 a receives a signal having a pulse frequency greater than a set frequency determined by resistors R15 and R16, and capacitors C2 and C6. The retriggerable pulse generators U3A and U3B also receive a signal from power-up delay circuit 205 a, which prevents nuisance triggering of the relays on startup. Therelay driver circuits 210 a shown inFIG. 5A include resistors R1, R3, R47, and R52; diodes D1 and D5; and switches Q1 and Q2. Therelay driver circuits 210 a control relays K1 and K2. In order for current to flow to the motor, both relays K1 and K2 need to “close”. - The
controller 150 a further includes twovoltage detectors first voltage detector 212 a includes resistors R71, R72, and R73; capacitor C26; diode D14; and switch Q4. Thefirst voltage detector 212 a detects when voltage is present across relay K1, and verifies that the relays are functioning properly before allowing the motor to be energized. Thesecond voltage detector 214 a includes resistors R66, R69, and R70; capacitor C9; diode D13; and switch Q3. Thesecond voltage detector 214 a senses if a two speed motor is being operated in high or low speed mode. The motor input power trip values are set according to what speed the motor is being operated. It is also envisioned that thecontroller 150 a can be used with a single speed motor without thesecond voltage detector 214 a (e.g.,controller 150 b is shown inFIG. 6 ). - The
controller 150 a also includes an ambientthermal sensor circuit 216 a for monitoring the operating temperature of thecontroller 150 a, a power supply monitor 220 a for monitoring the voltages produced by thepower supply 160 a, and a plurality of LEDs DS1 and DS3 for providing information to the user. In the construction shown, a green LED DS2 indicates power is applied to thecontroller 150 a, and a red LED DS3 indicates a fault has occurred. Of course, other interfaces can be used for providing information to the operator. - The
controller 150 a further includes aclean mode switch 218 a, which includes switch U4 and resistor R10. The clean mode switch can be actuated by an operator (e.g., a maintenance person) to deactivate the power monitoring function described herein for a time period (e.g., 30 minutes so that maintenance person can clean the vessel 105). Moreover, the red LED DS3 can be used to indicate thatcontroller 150 a is in a clean mode. After the time period, thecontroller 150 a returns to normal operation. In some constructions, the maintenance person can actuate theclean mode switch 218 a for thecontroller 150 a to exit the clean mode before the time period is completed. - In some cases, it may be desirable to deactivate the power monitoring function for reasons other than performing cleaning operations on the
vessel 105. Such cases may be referred as “deactivate mode”, “disabled mode”, “unprotected mode”, or the like. Regardless of the name, this later mode of operation can be at least partially characterized by the instructions defined under the clean mode operation above. Moreover, when referring to the clean mode and its operation herein, the discussion also applies to these later modes for deactivating the power monitoring function and vice versa. - The following describes the normal sequence of events for one method of operation of the
controller 150 a, some of which may be similar to the method of operation of thecontroller 150. When thefluid movement system 110 is initially activated, thesystem 110 may have to prime (discussed above) the suction side plumbing and get the fluid flowing smoothly (referred to as “the normal running period”). It is during the normal running period that the circuit is most effective at detecting an abnormal event. - Upon a system power-up, the
system 110 can enter a priming period. The priming period can be preset for a time duration (e.g., a time duration of 3 minutes), or for a time duration determined by a sensed condition. After the priming period, thesystem 110 enters the normal running period. Thecontroller 150 a can include instructions to perform an automatic calibration to determine one or more calibration values after a first system power-up. One example calibration value is a power calibration value. In some cases, the power calibration value is an average of monitored power values over a predetermined period of time. The power calibration value is stored in the memory of themicrocontroller 185, and will be used as the basis for monitoring thevessel 105. - If for some reason the operating conditions of the
vessel 105 change, thecontroller 150 a can be re-calibrated by the operator. In some constructions, the operator actuates the calibrateswitch 195 a to erase the existing one or more calibration values stored in the memory of themicrocontroller 185. The operator then powers down thesystem 110, particularly themotor 145, and performs a system power-up. Thesystem 110 starts the automatic calibration process as discussed above to determine new one or more calibration values. If at any time during normal operation, the monitored power varies from the power calibration value (e.g., varies from a 12.5% window around the power calibration value), themotor 145 will be powered down and the fault LED DS3 is lit. - In one construction, the automatic calibration instructions include not monitoring the power of the
motor 145 during a start-up period, generally preset for a time duration (e.g., 2 seconds), upon the system power-up. In the case when thesystem 110 is operated for the first time, thesystem 110 enters the prime period, upon completion of the start-up period, and the power of themotor 145 is monitored to determine the power calibration value. As indicated above, the power calibration value is stored in the memory of themicrocontroller 185. After completion of the 3 minutes of the priming period, thesystem 110 enters the normal running period. In subsequent system power-ups, the monitored power is compared against the power calibration value stored in the memory of themicrocontroller 185 memory during the priming period. More specifically, thesystem 110 enters the normal running period when the monitored power rises above the power calibration value during the priming period. In some cases, the monitored power does not rise above the power calibration value within the 3 minutes of the priming period. As a consequence, themotor 145 is powered down and a fault indicator is lit. - In other constructions, the priming period of the automatic calibration can include a longer preset time duration (for example, 4 minutes) or an adjustable time duration capability. Additionally, the
controller 150 a can include instructions to perform signal conditioning operations to the monitored power. For example, thecontroller 150 a can include instructions to perform an IIR filter to condition the monitored power. In some cases, the IIR filter can be applied to the monitored power during the priming period and the normal operation period. In other cases, the IIR filter can be applied to the monitored power upon determining the power calibration value after the priming period. - Similar to
controller 150, thecontroller 150 a measures motor input power, and not just motor power factor or input current. However, it is envisioned that thecontrollers controller 150 a for determining whether the water is impeded. Also, it is envisioned that thecontroller 150 a can be modified to monitor other parameters (e.g., suction side pressure) of thesystem 110. - For some constructions of the
controller 150 a, themicrocontroller 185 a monitors the motor input power for an over power condition in addition to an under power condition. The monitoring of an over power condition helps reduce the chance thatcontroller 150 a was incorrectly calibrated, and/or also helps detect when the pump is over loaded (e.g., the pump is moving too much fluid). - The voltage sense and
average circuit 165 a generates a value representing the averaged power line voltage and the current sense andaverage circuit 170 a generates a value representing the averaged motor current. Motor power factor is derived from the timing difference between the sign of the voltage signal and the sign of the current signal. This time difference is used to look up the motor power factor from a table stored in themicrocontroller 185 a. The averaged power line voltage, the averaged motor current, and the motor power factor are then used to calculate the motor input power using equation e1 as was discussed earlier. The calculated motor input power is then compared to the calibrated value to determine whether a fault has occurred. If a fault has occurred, the motor is powered down and the fault indicator is lit. - Redundancy is also used for the power switches of the
controller 150 a. Two relays K1 and K2 are used in series to do this function. This way, a failure of either component will still leave one switch to turn off themotor 145. As an additional safety feature, the proper operation of both relays is checked by themicrocontroller 185 a every time themotor 145 is powered-on via the relayvoltage detector circuit 212 a. - Another aspect of the
controller 150 a is that themicrocontroller 185 a provides pulses at a frequency greater than a set frequency (determined by the retriggerable pulse generator circuits) to close the relays K1 and K2. If the pulse generators U3A and U3B are not triggered at the proper frequency, the relays K1 and K2 open and the motor powers down. - As previously indicated, the
microcontroller microcontroller microcontroller controller - One aspect of the
controller microcontroller microcontroller controller motor 145 to shut down thepump 140. This aspect of thecontroller controller motor 145 when the power level of themotor 145 traverses a predetermined value. - For example,
FIG. 7 shows a graph indicating input power and power derivative as functions of time. More specifically,FIG. 7 shows a power reading (line 300) and a power derivate value (line 305), over a 30-second time period, of amotor 145 calibrated at a power threshold value of 5000 and a power derivative threshold of −100. In this particular example, a water blockage in the fluid-movement system 110 (shown inFIG. 1 ) occurs at the 20-second mark. It can be observed fromFIG. 7 that thepower reading 300 indicates a power level drop below the threshold value of 5000 at the 27-second mark, causing thecontroller pump 140 approximately at the 28-second mark. It can also be observed that thepower derivative value 305 drops below the −100 threshold value at the 22-second mark, causing thecontroller pump 140 approximately at the 23-second mark. Other parameters of the motor 145 (e.g., torque) can be monitored by themicrocontroller - In another aspect of the
controller microcontroller exemplary model observer 310 shown inFIG. 8 . Themodel observer 310 includes afirst filter 315, aregulator 325 having avariable gain 326 and atransfer function 327, afluid system model 330 having a gain parameter (shown inFIG. 8 with the value of 1), and asecond filter 335. In particular, thefluid system model 330 is configured to simulate the fluid-movement system 110. Additionally, thefirst filter 315 and thesecond filter 335 can include various types of analog and digital filters such as, but not limited to, low pass, high pass, band pass, anti-aliasing, IIR, and/or FIR filters. - It is to be understood that the
model observer 310 is not limited to the elements described above. In other words, themodel observer 310 may not necessarily include all the elements described above and/or may include other elements or combination of elements not explicitly described herein. In reference particularly to thefluid system model 330, a fluid system model may be defined utilizing various procedures. In some cases, a model may be generated for this particular aspect of thecontroller - In reference to the
model observer 310 ofFIG. 8 , thefirst filter 315 receives a signal (P) corresponding to a parameter of themotor 145 determined and monitored by themicrocontroller first filter 315 is configured to substantially eliminate the noise in the received signal (P), thus generating a filtered signal (PA). However, thefirst filter 315 may perform other functions such as anti-aliasing or filtering the received signal to a predetermined frequency range. The filtered signal (PA) enters a feed-back loop 340 of themodel observer 310 and is processed by theregulator 325. Theregulator 325 outputs a regulated signal (ro) related to the fluid flow and/or pressure through the fluid-movement system 110 based on the monitored parameter. The regulated signal can be interpreted as a modeled flow rate or modeled pressure. Thefluid system model 330 processes the regulated signal (ro) to generate a model signal (Fil), which is compared to the filtered signal (PA) through the feed-back loop 340. The regulated signal (ro) is also fed to thesecond filter 335 generating a control signal (roP), which is subsequently used by themicrocontroller motor 145. - As shown in
FIG. 8 , the regulated signal (ro), indicative of fluid flow and/or pressure, is related to the monitored parameter as shown in equation [e2]. -
ro=(PA−Fil)*regulator [e2] - The relationship shown in equation [e2] allows a user to control the
motor 145 based on a direct relationship between the input power or torque and a parameter of the fluid flow, such as flow rate and pressure, without having to directly measure the fluid flow parameter. -
FIG. 9 is a graph showing an input power (line 345) and a processed power or flow unit (line 350) as functions of time. More specifically, the graph ofFIG. 9 illustrates the operation of the fluid-movement system 110 with themotor 145 having a threshold value of 5000. For this particular example,FIG. 9 shows that thepump inlet 125 blocked at the 5-second mark. The input power drops below the threshold mark of 5000, and therefore thecontroller pump 140 approximately at the 12.5-second mark. Alternatively, the processed power signal drops below the threshold mark corresponding to 5000 at the 6-second mark, and therefore thecontroller pump 140 approximately at the 7-second mark. - In this particular example, the gain parameter of the
fluid system model 330 is set to a value of 1, thereby measuring a unit of pressure with the same scale as the unit of power. In other examples, the user can set the gain parameter at a different value to at least control aspects of the operation of themotor 145, such as shut down time. - In another aspect of the
controller microcontroller controller pump 140. It is to be understood that the term “floating” refers to varying or adjusting a signal or value. In one example, themicrocontroller FIG. 10 . More specifically,FIG. 10 shows a graph indicating an average input power signal (line 355) determined and monitored by themicrocontroller FIG. 10 with arrow 362) as a function of time. In this particular case, thethreshold value 362 is a parameter indicating the minimum value that the trip value can be adjusted to. - The
microcontroller average input power 355 utilizing various methods. In one construction, themicrocontroller average circuit average circuit microcontroller FIG. 10 , the average power determined by themicrocontroller signal 360 indicating the trip value is adjusted down to about 10% from the value at the O-time unit mark to the 80-time unit mark and is substantially parallel to theaverage power 355. More specifically, themicrocontroller average input power 355. - In some cases, the
average power signal 355 may define a behavior, such as the one shown inFIG. 10 , due to sustained clogging of the fluid-movement system 110 over a period of time, for example from the O-time unit mark to the 80-time unit mark. In other words, sustained clogging of the fluid-movement system 110 can be determined and monitored by themicrocontroller average power signal 355. In these cases, themicrocontroller motor 145, or a minimum allowed threshold value such asthreshold value 362. When the fluid-movement system 110 is back-flushed with the purpose of unclogging the fluid-movement system 110, theaverage power signal 355 returns to normal unrestricted fluid flow (shown inFIG. 10 between about the 84-time unit mark and about the 92-time unit mark, for example). As shown inFIG. 10 , unclogging the fluid-movement system 110 can result in relative desired fluid flow through the fluid-movement system 110. As a consequence, themicrocontroller FIG. 10 showing as the average power returns to the calibration value. - In other cases, the
microcontroller microcontroller controller microcontroller controller pump 140 when the average power drops to a value substantially equal or lower than the variable trip value and sustains this condition over a second period of time (e.g., 1 second). - In another aspect of the
controller microcontroller movement system 110 for a specific motor/pump combination. More specifically, thecontroller motor 145 to calibrate the fluid-movement system 110 based on the environment in which the fluid-movement system 110 operates. The environment in which the fluid-movement system 110 operates can be defined by the capacity of thevessel 105, tubing configuration between thedrain 115 andinlet 125, tubing configuration betweenoutlet 130 and return 135 (shown inFIG. 1 ), number of drains and returns, and other factors not explicitly discussed herein. - Calibration of the fluid-
movement system 110 is generally performed the first time the system is operated after installation. It is to be understood that the processes described herein are also applicable to recalibration procedures. In one example, calibration of the fluid-movement system 110 includes determining a threshold value based on characterizing a specific motor/pump combination and establishing a relationship between, for example, input power and pressure via a stored look-up table or an equation.FIG. 11 shows a chart having characterization data (line 365), measured in kilowatts and obtained through a calibration process, and a pump curve (line 370) indicating head pressure. Thecharacterization data 365 and thepump curve 370 are graphed as a function of flow measured in gallons per minute (GPM). In the particular example shown inFIG. 11 , it is possible for a user (or themicrocontroller - Referring particularly to the
characterization data 365 shown inFIG. 11 , if an operating point for the fluid-movement system 110 is determined atpoint 1 on thecharacterization data 365, a 30% reduction in flow from 100 GPM to 70 GPM (point 2 on the characterization data 365) through the fluid-movement system 110 is monitored by themicrocontroller movement system 110, the operating set point can be established atpoint 2, for example. Particularly, a 30% reduction in flow from 70 GPM to 50 GPM (point 3 on the characterization data 365) through the fluid-movement system 110 is monitored by themicrocontroller microcontroller - In another aspect of the
controller microcontroller movement system 110. In one example, the timer function of themicrocontroller controller controller motor 145 automatically over predetermined periods of time. In other words, thecontroller motor 145 based on predetermined time periods programmed in themicrocontroller microcontroller controller controller motor 145 only as a result of direct interaction of the user. In other words, thecontroller motor 145 off until a user directly operates thecontroller controller microcontroller controller controller motor 145 off until the user actuates one of the switches (e.g., calibrateswitch clean mode switch 218 a) of thecontroller motor 145. For example, the user can actuate one switch three times indicating thecontroller motor 145 for a period of three hours. In some constructions, thecontroller controller controller controller - In another aspect of the
controller microcontroller motor 145. More specifically, themicrocontroller average circuit average circuit motor 145. As explained above, themicrocontroller motor 145, allowing themicrocontroller motor 145 and a relationship between the torque and the input power. In some constructions, the speed of themotor 145 remains substantially constant during operation of themotor 145. In these particular cases, themicrocontroller motor 145. Determining and monitoring the torque of themotor 145 allows themicrocontroller motor 145 in case of an undesired condition of themotor 145. For example,FIG. 12 shows a chart indicating a relationship between input power and torque for amotor 145 under the observation that the speed of themotor 145 changes less than 2%. Thus, themicrocontroller - In some constructions, the fluid-
movement system 110 can operate two ormore vessels 105. For example, the fluid-movement system 110 can include a piping system to control fluid flow to a pool, and a second piping system to control fluid flow to a spa. For this particular example, the flow requirements for the pool and the spa are generally different and may define or require separate settings of thecontroller controller motor 145 to control fluid flow to the pool, the spa, or both. The fluid-movement system 110 can include one or more valves that may be manually or automatically operated to direct fluid flow as desired. In an exemplary case where the fluid-movement system 110 includes one solenoid valve, a user can operate the valve to direct flow to one of the pool and the spa. Additionally, thecontroller controller vessels 105, where fluid flow to the number ofvessels 105 can be controller by one or more fluid-movement systems 110. - While numerous aspects of the
controller controller - The constructions described above and illustrated in the figures are presented by way of example only and are not intended as a limitation upon the concepts and principles of the invention. Various features and advantages of the invention are set forth in the following claims.
Claims (38)
1. A pumping apparatus for a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus being connectable to a power source and comprising:
a pump including an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return;
a motor coupled to the pump to operate the pump;
a sensor configured to generate a signal having a relation to a parameter of the motor;
a switch coupled to the motor and configured to control at least a characteristic of the motor; and
a microcontroller coupled to the sensor and the switch, the microcontroller including a model observer configured to receive a first value based on the signal and to generate a second value representative of at least one of a modeled flow or a modeled pressure based on the first value, the microcontroller configured to control the motor based on the second value.
2. The pumping apparatus of claim 1 , wherein the sensor includes a voltage sensor configured to generate a first signal having a relation to a voltage applied to the motor, and a current sensor configured to generate a second signal having a relation to a current applied to the motor, and wherein the microcontroller is configured to generate the first value based on the first signal and the second signal.
3. The pumping apparatus of claim 1 , wherein the sensor includes a voltage sensor and a current sensor, and wherein the first value includes a motor power value.
4. The pumping apparatus of claim 1 , wherein first value includes a motor torque value.
5. The pumping apparatus of claim 1 , wherein the model observer includes a model that simulates the pumping apparatus.
6. The pumping apparatus of claim 1 , wherein the model observer includes a model that simulates at least part of the jetted-fluid system.
7. The pumping apparatus of claim 1 , wherein the microcontroller is further configured to
monitor the second value,
determine whether the monitored second value indicates an undesired flow of fluid through the pump, and
control the motor to cease operation of the pump when the determination indicates an undesired flow of fluid through the pump and zero or more other conditions exist.
8. A pumping apparatus for a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus being connectable to a power source and comprising:
a pump including an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return;
a motor coupled to the pump to operate the pump;
a sensor configured to generate a signal having a relation to a parameter of the motor;
a switch coupled to the motor and configured to control at least a characteristic of the motor; and
a microcontroller coupled to the sensor and the switch, the microcontroller including a model observer configured to receive a first value based on the signal and to generate a second value representative of a modeled pressure based on the first value, the microcontroller configured to control the motor based on the second value.
9. The pumping apparatus of claim 8 , wherein the sensor includes a voltage sensor configured to generate a first signal having a relation to a voltage applied to the motor, and a current sensor configured to generate a second signal having a relation to a current applied to the motor, and wherein the microcontroller is configured to generate the first value based on the first signal and the second signal.
11. The pumping apparatus of claim 8 , wherein the sensor includes a voltage sensor and a current sensor, and wherein the first value includes a motor power value.
12. The pumping apparatus of claim 8 , wherein first value includes a motor torque value.
13. The pumping apparatus of claim 8 , wherein the model observer includes a model that simulates the pumping apparatus.
14. The pumping apparatus of claim 8 , wherein the model observer includes a model that simulates at least part of the jetted-fluid system.
15. The pumping apparatus of claim 8 , wherein the microcontroller is further configured to
monitor the second value,
determine whether the monitored second value indicates an undesired flow of fluid through the pump, and
control the motor to cease operation of the pump when the determination indicates an undesired flow of fluid through the pump and zero or more other conditions exist.
16. A method of controlling a motor operating a pumping apparatus of a jetted fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus comprising a pump having an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump, the method comprising:
determining a power of the pump motor;
applying the power to a model observer;
obtaining a value representative of a flow based on the power and the model observer;
determining whether the value indicates a condition of the pump; and
controlling the motor to operate the pump based on the condition of the pump.
17. The method of claim 16 , wherein monitoring the operation of the pump further comprises
determining a torque of the motor; and
applying the torque to the model observer.
18. The method of claim 16 , wherein monitoring the operation of the pump further comprises providing the model observer with a fluid system model simulating at least a portion of the jetted-fluid system.
19. The method of claim 16 , wherein determining whether the value indicates a condition of the pump further comprises
determining a trip value; and
comparing the value with the trip value.
20. A method of controlling a motor operating a pumping apparatus of a jetted fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus comprising a pump having an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump, the method comprising:
determining a power of the pump motor;
applying the power to a model observer;
obtaining a value representative of a pressure based on the power and the model observer;
determining whether the value indicates a condition of the pump; and
controlling the motor to operate the pump based on the condition of the pump.
21. The method of claim 20 , wherein monitoring the operation of the pump further comprises
determining a torque of the motor; and
applying the torque to the model observer.
22. The method of claim 20 , wherein monitoring the operation of the pump further comprises providing the model observer with a fluid system model simulating at least a portion of the jetted-fluid system.
23. The method of claim 20 , wherein determining whether the value indicates a condition of the pump further comprises
determining a trip value; and
comparing the value with the trip value.
24. A method of controlling a fluid-movement system including a motor and a pump, the motor being coupled to the pump to operate the pump, the method comprising:
calibrating the system to obtain a calibration value for a motor parameter;
obtaining a relationship between the motor parameter and a fluid parameter;
determining a trip value based on the calibration value and the relationship;
controlling the motor to operate the pump;
monitoring the operation of the pump, the monitoring act including
determining a value for the motor parameter,
comparing the value to the trip value, and
determining whether the comparison indicates a condition of the pump; and
further controlling the motor to operate the pump based on the condition of the pump.
25. The method of claim 24 , wherein the fluid parameter includes a flow rate.
26. The method of claim 24 , wherein the fluid parameter includes a pressure of the pump
27. The method of claim 24 , wherein the motor parameter includes motor input power.
28. The method of claim 24 , wherein the motor parameter includes motor torque.
29. The method of claim 24 , wherein the determining a trip value includes determining at least one characterization value based on the motor and the pump, and determining the trip value based on the at least one characterization value and the calibration value.
30. The method of claim 24 , wherein the calibrating the system includes calculating a calibration value related to torque.
31. The method of claim 24 , wherein the determining a trip value includes obtaining a second value based on the calibration value and the relationship, and wherein the calculating the trip value includes determining a percentage reduction of the second value.
32. The method of claim 24 , wherein the controlling the motor based on the condition of the pump includes inhibiting current through the motor to stop operation of the pumping apparatus.
33. The method of claim 24 , wherein the relationship includes an equation relating the fluid parameter and the motor parameter.
34. The method of claim 24 , wherein the relationship includes a table relating the fluid parameter and the motor parameter.
35. A method of controlling a fluid-movement system including a motor and a pump, the motor being coupled to the pump to operate the pump, the method comprising:
determining a relationship between an input power to the motor and a flow rate through the pump;
determining a calibration value for the input power;
determining a percentage drop for the relationship;
determining a trip value based on the relationship, the calibration value, and the percentage drop;
monitoring the operation of the pump, the monitoring act comprising
determining a first value for the input power,
comparing the first value to the trip value, and
determining whether the first value indicates a condition of the pump; and
controlling the motor to operate the pump based on the condition of the pump.
36. The method of claim 35 , wherein the controlling the motor based on the condition of the pump includes inhibiting current through the motor to stop operation of the pumping apparatus.
37. The method of claim 35 the determining a trip value includes applying the calibration value to the relationship to result in a flow rate value, adjusting the flow rate value by a percentage, applying the flow rate value to the relationship to result in the trip value.
38. The method of claim 35 , wherein the relationship includes an equation relating the fluid parameter and the motor parameter.
39. The method of claim 35 , wherein the relationship includes a table relating the fluid parameter and the motor parameter.
Priority Applications (5)
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EP07118126A EP1911977A3 (en) | 2006-10-13 | 2007-10-09 | Controller for A Motor and a Method of Controlling the Motor |
CA002606642A CA2606642A1 (en) | 2006-10-13 | 2007-10-12 | Controller for a motor and a method of controlling the motor |
US12/506,372 US8177519B2 (en) | 2006-10-13 | 2009-07-21 | Controller for a motor and a method of controlling the motor |
US12/506,417 US20090290990A1 (en) | 2006-10-13 | 2009-07-21 | Controller for a motor and a method of controlling the motor |
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US11/549,518 US20080095638A1 (en) | 2006-10-13 | 2006-10-13 | Controller for a motor and a method of controlling the motor |
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US12/506,372 Expired - Fee Related US8177519B2 (en) | 2006-10-13 | 2009-07-21 | Controller for a motor and a method of controlling the motor |
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US20050226731A1 (en) * | 2004-04-09 | 2005-10-13 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
US20090053072A1 (en) * | 2007-08-21 | 2009-02-26 | Justin Borgstadt | Integrated "One Pump" Control of Pumping Equipment |
US20090053073A1 (en) * | 2007-08-20 | 2009-02-26 | Charles Barry Ward | Condensate Pump |
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US20110002792A1 (en) * | 2004-04-09 | 2011-01-06 | Bartos Ronald P | Controller for a motor and a method of controlling the motor |
US20110061415A1 (en) * | 2005-03-25 | 2011-03-17 | Charles Barry Ward | Condensate Pump |
US20110085917A1 (en) * | 2005-03-25 | 2011-04-14 | Charles Barry Ward | Condensate Pump |
US8133034B2 (en) | 2004-04-09 | 2012-03-13 | Regal Beloit Epc Inc. | Controller for a motor and a method of controlling the motor |
US8281425B2 (en) | 2004-11-01 | 2012-10-09 | Cohen Joseph D | Load sensor safety vacuum release system |
US8436559B2 (en) | 2009-06-09 | 2013-05-07 | Sta-Rite Industries, Llc | System and method for motor drive control pad and drive terminals |
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US8465262B2 (en) | 2004-08-26 | 2013-06-18 | Pentair Water Pool And Spa, Inc. | Speed control |
US8469675B2 (en) | 2004-08-26 | 2013-06-25 | Pentair Water Pool And Spa, Inc. | Priming protection |
US8480373B2 (en) | 2004-08-26 | 2013-07-09 | Pentair Water Pool And Spa, Inc. | Filter loading |
US8500413B2 (en) | 2004-08-26 | 2013-08-06 | Pentair Water Pool And Spa, Inc. | Pumping system with power optimization |
US20130211615A1 (en) * | 2012-02-14 | 2013-08-15 | Emerson Electric Co. | Relay Switch Control and Related Methods |
US8564233B2 (en) | 2009-06-09 | 2013-10-22 | Sta-Rite Industries, Llc | Safety system and method for pump and motor |
US8602745B2 (en) | 2004-08-26 | 2013-12-10 | Pentair Water Pool And Spa, Inc. | Anti-entrapment and anti-dead head function |
US8801389B2 (en) | 2004-08-26 | 2014-08-12 | Pentair Water Pool And Spa, Inc. | Flow control |
US9031702B2 (en) | 2013-03-15 | 2015-05-12 | Hayward Industries, Inc. | Modular pool/spa control system |
US9243413B2 (en) | 2010-12-08 | 2016-01-26 | Pentair Water Pool And Spa, Inc. | Discharge vacuum relief valve for safety vacuum release system |
US9404500B2 (en) | 2004-08-26 | 2016-08-02 | Pentair Water Pool And Spa, Inc. | Control algorithm of variable speed pumping system |
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US20170213451A1 (en) | 2016-01-22 | 2017-07-27 | Hayward Industries, Inc. | Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment |
US9885360B2 (en) | 2012-10-25 | 2018-02-06 | Pentair Flow Technologies, Llc | Battery backup sump pump systems and methods |
US10465676B2 (en) | 2011-11-01 | 2019-11-05 | Pentair Water Pool And Spa, Inc. | Flow locking system and method |
US20200319621A1 (en) | 2016-01-22 | 2020-10-08 | Hayward Industries, Inc. | Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment |
US10947981B2 (en) | 2004-08-26 | 2021-03-16 | Pentair Water Pool And Spa, Inc. | Variable speed pumping system and method |
WO2021262348A1 (en) * | 2020-06-26 | 2021-12-30 | Saudi Arabian Oil Company | Methods for controlling pump flow rate based on pump flow rate estimation using pump head and performance curves and pump control systems having the same |
US11761665B2 (en) | 2019-01-08 | 2023-09-19 | Regal Beloit America, Inc. | Motor controller for electric blowers |
US11841022B2 (en) * | 2020-01-06 | 2023-12-12 | Regal Beloit America, Inc. | Control system for electric fluid moving apparatus |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080095639A1 (en) * | 2006-10-13 | 2008-04-24 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
DE102007050662A1 (en) * | 2007-10-24 | 2009-04-30 | Continental Teves Ag & Co. Ohg | Method and device for calibrating or diagnosing a motor vehicle brake system with a clocked pump |
US8135529B2 (en) * | 2008-09-23 | 2012-03-13 | Delta Electronics, Inc. | Method for controlling constant-pressure fluid |
US10054115B2 (en) | 2013-02-11 | 2018-08-21 | Ingersoll-Rand Company | Diaphragm pump with automatic priming function |
KR20160008513A (en) * | 2013-03-13 | 2016-01-22 | 프랭클린 컨트롤 시스템즈, 아이엔씨. | Apparatus, system, and/or method for intelligent motor protection and/or control |
US20140271231A1 (en) * | 2013-03-15 | 2014-09-18 | Fluid Management Operations Llc | Apparatus and Method for Processing Coating Compositions |
EP2910788B1 (en) * | 2014-02-25 | 2018-04-04 | TACO ITALIA S.r.l. | Method for controlling a pumping station within a fluid circulation system, related circulation system and pumping station for realizing said method |
US20160224033A1 (en) * | 2015-01-16 | 2016-08-04 | United Services Automobile Association ("USAA") | Computer monitoring system, apparatus and method for controlling appliance operation |
US10527043B2 (en) | 2015-03-27 | 2020-01-07 | Regal Beloit America, Inc. | Motor, controller and associated method |
US9970434B2 (en) | 2015-05-17 | 2018-05-15 | Regal Beloit America, Inc. | Motor, controller and associated method |
Citations (87)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1061919A (en) * | 1912-09-19 | 1913-05-13 | Clifford G Miller | Magnetic switch. |
US2767277A (en) * | 1952-12-04 | 1956-10-16 | James F Wirth | Control system for power operated fluid pumps |
US3191935A (en) * | 1962-07-02 | 1965-06-29 | Brunswick Corp | Pin detection means including electrically conductive and magnetically responsive circuit closing particles |
US3558910A (en) * | 1968-07-19 | 1971-01-26 | Motorola Inc | Relay circuits employing a triac to prevent arcing |
US3781925A (en) * | 1971-11-26 | 1974-01-01 | G Curtis | Pool water temperature control |
US3838597A (en) * | 1971-12-28 | 1974-10-01 | Mobil Oil Corp | Method and apparatus for monitoring well pumping units |
US3953777A (en) * | 1973-02-12 | 1976-04-27 | Delta-X Corporation | Control circuit for shutting off the electrical power to a liquid well pump |
US3963375A (en) * | 1974-03-12 | 1976-06-15 | Curtis George C | Time delayed shut-down circuit for recirculation pump |
US4021700A (en) * | 1975-06-04 | 1977-05-03 | Borg-Warner Corporation | Digital logic control system for three-phase submersible pump motor |
US4168413A (en) * | 1978-03-13 | 1979-09-18 | Halpine Joseph C | Piston detector switch |
US4185187A (en) * | 1977-08-17 | 1980-01-22 | Rogers David H | Electric water heating apparatus |
US4319712A (en) * | 1980-04-28 | 1982-03-16 | Ofer Bar | Energy utilization reduction devices |
US4370098A (en) * | 1980-10-20 | 1983-01-25 | Esco Manufacturing Company | Method and apparatus for monitoring and controlling on line dynamic operating conditions |
US4371315A (en) * | 1980-09-02 | 1983-02-01 | International Telephone And Telegraph Corporation | Pressure booster system with low-flow shut-down control |
US4428434A (en) * | 1981-06-19 | 1984-01-31 | Gelaude Jonathon L | Automatic fire protection system |
US4449260A (en) * | 1982-09-01 | 1984-05-22 | Whitaker Brackston T | Swimming pool cleaning method and apparatus |
US4473338A (en) * | 1980-09-15 | 1984-09-25 | Garmong Victor H | Controlled well pump and method of analyzing well production |
US4504773A (en) * | 1981-09-10 | 1985-03-12 | Kureha Kagaku Kogyo Kabushiki Kaisha | Capacitor discharge circuit |
US4505643A (en) * | 1983-03-18 | 1985-03-19 | North Coast Systems, Inc. | Liquid pump control |
US4514989A (en) * | 1984-05-14 | 1985-05-07 | Carrier Corporation | Method and control system for protecting an electric motor driven compressor in a refrigeration system |
US4541029A (en) * | 1982-10-06 | 1985-09-10 | Tsubakimoto Chain Co. | Over-load and light-load protection for electric machinery |
US4676914A (en) * | 1983-03-18 | 1987-06-30 | North Coast Systems, Inc. | Microprocessor based pump controller for backwashable filter |
US4695779A (en) * | 1986-05-19 | 1987-09-22 | Sargent Oil Well Equipment Company Of Dover Resources, Incorporated | Motor protection system and process |
US4758697A (en) * | 1983-11-04 | 1988-07-19 | Societe Internationale de Promotion Commerciale | Intermittent supply control device for electric appliances of in particular a hotel room |
US4781525A (en) * | 1987-07-17 | 1988-11-01 | Minnesota Mining And Manufacturing Company | Flow measurement system |
US4837656A (en) * | 1987-02-27 | 1989-06-06 | Barnes Austen Bernard | Malfunction detector |
US4839571A (en) * | 1987-03-17 | 1989-06-13 | Barber-Greene Company | Safety back-up for metering pump control |
US4841404A (en) * | 1987-10-07 | 1989-06-20 | Spring Valley Associates, Inc. | Pump and electric motor protector |
US4864287A (en) * | 1983-07-11 | 1989-09-05 | Square D Company | Apparatus and method for calibrating a motor monitor by reading and storing a desired value of the power factor |
US4907610A (en) * | 1986-08-15 | 1990-03-13 | Crystal Pools, Inc. | Cleaning system for swimming pools and the like |
US4998097A (en) * | 1983-07-11 | 1991-03-05 | Square D Company | Mechanically operated pressure switch having solid state components |
US5079784A (en) * | 1989-02-03 | 1992-01-14 | Hydr-O-Dynamic Systems, Inc. | Hydro-massage tub control system |
US5100298A (en) * | 1989-03-07 | 1992-03-31 | Ebara Corporation | Controller for underwater pump |
US5234286A (en) * | 1992-01-08 | 1993-08-10 | Kenneth Wagner | Underground water reservoir |
US5324170A (en) * | 1984-12-31 | 1994-06-28 | Rule Industries, Inc. | Pump control apparatus and method |
US5347664A (en) * | 1990-06-20 | 1994-09-20 | Kdi American Products, Inc. | Suction fitting with pump control device |
US5422014A (en) * | 1993-03-18 | 1995-06-06 | Allen; Ross R. | Automatic chemical monitor and control system |
US5545012A (en) * | 1993-10-04 | 1996-08-13 | Rule Industries, Inc. | Soft-start pump control system |
US5550753A (en) * | 1987-05-27 | 1996-08-27 | Irving C. Siegel | Microcomputer SPA control system |
US5548854A (en) * | 1993-08-16 | 1996-08-27 | Kohler Co. | Hydro-massage tub control system |
US5559720A (en) * | 1987-05-27 | 1996-09-24 | Irving C. Siegel | Spa control system |
US5601413A (en) * | 1996-02-23 | 1997-02-11 | Great Plains Industries, Inc. | Automatic low fluid shut-off method for a pumping system |
US5624237A (en) * | 1994-03-29 | 1997-04-29 | Prescott; Russell E. | Pump overload control assembly |
US5633540A (en) * | 1996-06-25 | 1997-05-27 | Lutron Electronics Co., Inc. | Surge-resistant relay switching circuit |
US5632468A (en) * | 1993-02-24 | 1997-05-27 | Aquatec Water Systems, Inc. | Control circuit for solenoid valve |
US5727933A (en) * | 1995-12-20 | 1998-03-17 | Hale Fire Pump Company | Pump and flow sensor combination |
US5777833A (en) * | 1996-02-02 | 1998-07-07 | Schneider Electric Sa | Electronic relay for calculating the power of a multiphase electric load based on a rectified wave signal and a phase current |
US5930092A (en) * | 1992-01-17 | 1999-07-27 | Load Controls, Incorporated | Power monitoring |
US5947700A (en) * | 1997-07-28 | 1999-09-07 | Mckain; Paul C. | Fluid vacuum safety device for fluid transfer systems in swimming pools |
US6043461A (en) * | 1993-04-05 | 2000-03-28 | Whirlpool Corporation | Over temperature condition sensing method and apparatus for a domestic appliance |
US6045333A (en) * | 1997-12-01 | 2000-04-04 | Camco International, Inc. | Method and apparatus for controlling a submergible pumping system |
US6059536A (en) * | 1996-01-22 | 2000-05-09 | O.I.A. Llc | Emergency shutdown system for a water-circulating pump |
US6171073B1 (en) * | 1997-07-28 | 2001-01-09 | Mckain Paul C. | Fluid vacuum safety device for fluid transfer and circulation systems |
US6199224B1 (en) * | 1996-05-29 | 2001-03-13 | Vico Products Mfg., Co. | Cleaning system for hydromassage baths |
US6238188B1 (en) * | 1998-08-17 | 2001-05-29 | Carrier Corporation | Compressor control at voltage and frequency extremes of power supply |
US6342841B1 (en) * | 1998-04-10 | 2002-01-29 | O.I.A. Llc | Influent blockage detection system |
US6354805B1 (en) * | 1999-07-12 | 2002-03-12 | Danfoss A/S | Method for regulating a delivery variable of a pump |
US6390781B1 (en) * | 1999-07-15 | 2002-05-21 | Itt Manufacturing Enterprises, Inc. | Spa pressure sensing system capable of entrapment detection |
US6504338B1 (en) * | 2001-07-12 | 2003-01-07 | Varidigm Corporation | Constant CFM control algorithm for an air moving system utilizing a centrifugal blower driven by an induction motor |
US6522034B1 (en) * | 1999-09-03 | 2003-02-18 | Yazaki Corporation | Switching circuit and multi-voltage level power supply unit employing the same |
US6534940B2 (en) * | 2001-06-18 | 2003-03-18 | Smart Marine Systems, Llc | Marine macerator pump control module |
US6543940B2 (en) * | 2001-04-05 | 2003-04-08 | Max Chu | Fiber converter faceplate outlet |
US6590188B2 (en) * | 1998-09-03 | 2003-07-08 | Balboa Instruments, Inc. | Control system for bathers |
US6616413B2 (en) * | 1998-03-20 | 2003-09-09 | James C. Humpheries | Automatic optimizing pump and sensor system |
US6623245B2 (en) * | 2001-11-26 | 2003-09-23 | Shurflo Pump Manufacturing Company, Inc. | Pump and pump control circuit apparatus and method |
US6676831B2 (en) * | 2001-08-17 | 2004-01-13 | Michael Lawrence Wolfe | Modular integrated multifunction pool safety controller (MIMPSC) |
US20040009075A1 (en) * | 2001-11-26 | 2004-01-15 | Meza Humberto V. | Pump and pump control circuit apparatus and method |
US6696676B1 (en) * | 1999-03-30 | 2004-02-24 | General Electric Company | Voltage compensation in combination oven using radiant and microwave energy |
US6709240B1 (en) * | 2002-11-13 | 2004-03-23 | Eaton Corporation | Method and apparatus of detecting low flow/cavitation in a centrifugal pump |
US20040064292A1 (en) * | 2002-09-27 | 2004-04-01 | Beck Thomas L. | Control system for centrifugal pumps |
US6715996B2 (en) * | 2001-04-02 | 2004-04-06 | Danfoss Drives A/S | Method for the operation of a centrifugal pump |
US6732387B1 (en) * | 2003-06-05 | 2004-05-11 | Belvedere Usa Corporation | Automated pedicure system |
US20040090197A1 (en) * | 2002-11-08 | 2004-05-13 | Schuchmann Russell P. | Method and apparatus of detecting disturbances in a centrifugal pump |
US6768279B1 (en) * | 1994-05-27 | 2004-07-27 | Emerson Electric Co. | Reprogrammable motor drive and control therefore |
US20050097665A1 (en) * | 2003-04-16 | 2005-05-12 | Paramount Leisure Industries, Inc. | Hydraulic suction fuse for swimming pools |
US20050123408A1 (en) * | 2003-12-08 | 2005-06-09 | Koehl Robert M. | Pump control system and method |
US20050133088A1 (en) * | 2003-12-19 | 2005-06-23 | Zorba, Agio & Bologeorges, L.P. | Solar-powered water features with submersible solar cells |
US20050158177A1 (en) * | 2003-07-09 | 2005-07-21 | A.O. Smith Corporation | Switch assembly, electric machine having the switch assembly, and method of controlling the same |
US6941785B2 (en) * | 2003-05-13 | 2005-09-13 | Ut-Battelle, Llc | Electric fuel pump condition monitor system using electrical signature analysis |
US20060045750A1 (en) * | 2004-08-26 | 2006-03-02 | Pentair Pool Products, Inc. | Variable speed pumping system and method |
US7163380B2 (en) * | 2003-07-29 | 2007-01-16 | Tokyo Electron Limited | Control of fluid flow in the processing of an object with a fluid |
US20070061051A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070058313A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070160480A1 (en) * | 2006-01-06 | 2007-07-12 | Itt Industries | No water / dead head detection pump protection algorithm |
US20070177985A1 (en) * | 2005-07-21 | 2007-08-02 | Walls James C | Integral sensor and control for dry run and flow fault protection of a pump |
US7417834B2 (en) * | 2005-04-22 | 2008-08-26 | Balboa Instruments, Inc. | Shutoff system for pool or spa |
US20090035151A1 (en) * | 2005-04-08 | 2009-02-05 | Ebara Corporation | Vacuum pump self-diagnosis method, vacuum pump self-diagnosis system, and vacuum pump central monitoring system |
Family Cites Families (71)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2946049A1 (en) * | 1979-11-15 | 1981-05-27 | Hoechst Ag, 6000 Frankfurt | Circulation pump flow-rate regulation system - measures pump loading and rotation to obtain actual flow-rate |
US4420787A (en) | 1981-12-03 | 1983-12-13 | Spring Valley Associates Inc. | Water pump protector |
GB8315154D0 (en) * | 1983-06-02 | 1983-07-06 | Ideal Standard | Pump protection system |
US4678404A (en) * | 1983-10-28 | 1987-07-07 | Hughes Tool Company | Low volume variable rpm submersible well pump |
DE3402120A1 (en) * | 1984-01-23 | 1985-07-25 | Rheinhütte vorm. Ludwig Beck GmbH & Co, 6200 Wiesbaden | METHOD AND DEVICE FOR CONTROLLING DIFFERENT OPERATING PARAMETERS FOR PUMPS AND COMPRESSORS |
US4581900A (en) | 1984-12-24 | 1986-04-15 | Borg-Warner Corporation | Method and apparatus for detecting surge in centrifugal compressors driven by electric motors |
US4647825A (en) | 1985-02-25 | 1987-03-03 | Square D Company | Up-to-speed enable for jam under load and phase loss |
DE3542370C2 (en) * | 1985-11-30 | 2003-06-05 | Wilo Gmbh | Procedure for regulating the head of a pump |
US4697464A (en) | 1986-04-16 | 1987-10-06 | Martin Thomas E | Pressure washer systems analyzer |
USRE33874E (en) * | 1986-05-22 | 1992-04-07 | Franklin Electric Co., Inc. | Electric motor load sensing system |
US4703387A (en) * | 1986-05-22 | 1987-10-27 | Franklin Electric Co., Inc. | Electric motor underload protection system |
US4896101A (en) | 1986-12-03 | 1990-01-23 | Cobb Harold R W | Method for monitoring, recording, and evaluating valve operating trends |
US6965815B1 (en) * | 1987-05-27 | 2005-11-15 | Bilboa Instruments, Inc. | Spa control system |
US4885655A (en) | 1987-10-07 | 1989-12-05 | Spring Valley Associates, Inc. | Water pump protector unit |
US4996646A (en) | 1988-03-31 | 1991-02-26 | Square D Company | Microprocessor-controlled circuit breaker and system |
US4971522A (en) * | 1989-05-11 | 1990-11-20 | Butlin Duncan M | Control system and method for AC motor driven cyclic load |
US5167041A (en) | 1990-06-20 | 1992-12-01 | Kdi American Products, Inc. | Suction fitting with pump control device |
US5255148A (en) | 1990-08-24 | 1993-10-19 | Pacific Scientific Company | Autoranging faulted circuit indicator |
US5172089A (en) | 1991-06-14 | 1992-12-15 | Wright Jane F | Pool pump fail safe switch |
US5473497A (en) | 1993-02-05 | 1995-12-05 | Franklin Electric Co., Inc. | Electronic motor load sensing device |
US5959534A (en) | 1993-10-29 | 1999-09-28 | Splash Industries, Inc. | Swimming pool alarm |
US5577890A (en) * | 1994-03-01 | 1996-11-26 | Trilogy Controls, Inc. | Solid state pump control and protection system |
US5570481A (en) | 1994-11-09 | 1996-11-05 | Vico Products Manufacturing Co., Inc. | Suction-actuated control system for whirlpool bath/spa installations |
CA2163137A1 (en) | 1995-11-17 | 1997-05-18 | Ben B. Wolodko | Method and apparatus for controlling downhole rotary pump used in production of oil wells |
US6074180A (en) | 1996-05-03 | 2000-06-13 | Medquest Products, Inc. | Hybrid magnetically suspended and rotated centrifugal pumping apparatus and method |
US5971712A (en) | 1996-05-22 | 1999-10-26 | Ingersoll-Rand Company | Method for detecting the occurrence of surge in a centrifugal compressor |
US5833437A (en) * | 1996-07-02 | 1998-11-10 | Shurflo Pump Manufacturing Co. | Bilge pump |
US5883489A (en) | 1996-09-27 | 1999-03-16 | General Electric Company | High speed deep well pump for residential use |
US6092992A (en) | 1996-10-24 | 2000-07-25 | Imblum; Gregory G. | System and method for pump control and fault detection |
US5690476A (en) | 1996-10-25 | 1997-11-25 | Miller; Bernard J. | Safety device for avoiding entrapment at a water reservoir drain |
US6468052B2 (en) | 1997-07-28 | 2002-10-22 | Robert M. Downey | Vacuum relief device for fluid transfer and circulation systems |
DE19736079A1 (en) | 1997-08-20 | 1999-02-25 | Uwe Unterwasser Electric Gmbh | Water flow generation unit especially for swimming pool |
US5907281A (en) * | 1998-05-05 | 1999-05-25 | Johnson Engineering Corporation | Swimmer location monitor |
JPH11348794A (en) | 1998-06-08 | 1999-12-21 | Koyo Seiko Co Ltd | Power steering device |
JP2000179339A (en) | 1998-12-18 | 2000-06-27 | Aisin Seiki Co Ltd | Cooling water circulating device |
TW470815B (en) * | 1999-04-30 | 2002-01-01 | Arumo Technos Kk | Method and apparatus for controlling a vacuum pump |
US6468042B2 (en) | 1999-07-12 | 2002-10-22 | Danfoss Drives A/S | Method for regulating a delivery variable of a pump |
US6157304A (en) | 1999-09-01 | 2000-12-05 | Bennett; Michelle S. | Pool alarm system including motion detectors and a drain blockage sensor |
US6481973B1 (en) * | 1999-10-27 | 2002-11-19 | Little Giant Pump Company | Method of operating variable-speed submersible pump unit |
US6501629B1 (en) | 2000-10-26 | 2002-12-31 | Tecumseh Products Company | Hermetic refrigeration compressor motor protector |
US6638023B2 (en) | 2001-01-05 | 2003-10-28 | Little Giant Pump Company | Method and system for adjusting operating parameters of computer controlled pumps |
US6534947B2 (en) * | 2001-01-12 | 2003-03-18 | Sta-Rite Industries, Inc. | Pump controller |
US20030106147A1 (en) | 2001-12-10 | 2003-06-12 | Cohen Joseph D. | Propulsion-Release Safety Vacuum Release System |
US6636135B1 (en) | 2002-06-07 | 2003-10-21 | Christopher J. Vetter | Reed switch control for a garbage disposal |
US6806677B2 (en) | 2002-10-11 | 2004-10-19 | Gerard Kelly | Automatic control switch for an electric motor |
US6875961B1 (en) | 2003-03-06 | 2005-04-05 | Thornbury Investments, Inc. | Method and means for controlling electrical distribution |
US6998807B2 (en) | 2003-04-25 | 2006-02-14 | Itt Manufacturing Enterprises, Inc. | Active sensing and switching device |
US7327275B2 (en) | 2004-02-02 | 2008-02-05 | Gecko Alliance Group Inc. | Bathing system controller having abnormal operational condition identification capabilities |
US20050193485A1 (en) * | 2004-03-02 | 2005-09-08 | Wolfe Michael L. | Machine for anticipatory sensing and intervention to avoid swimmer entrapment |
US8133034B2 (en) | 2004-04-09 | 2012-03-13 | Regal Beloit Epc Inc. | Controller for a motor and a method of controlling the motor |
US20110002792A1 (en) | 2004-04-09 | 2011-01-06 | Bartos Ronald P | Controller for a motor and a method of controlling the motor |
EP1585205B1 (en) | 2004-04-09 | 2017-12-06 | Regal Beloit America, Inc. | Pumping apparatus and method of detecting an entrapment in a pumping apparatus |
US20080095639A1 (en) | 2006-10-13 | 2008-04-24 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
US7437215B2 (en) | 2004-06-18 | 2008-10-14 | Unico, Inc. | Method and system for improving pump efficiency and productivity under power disturbance conditions |
US8019479B2 (en) | 2004-08-26 | 2011-09-13 | Pentair Water Pool And Spa, Inc. | Control algorithm of variable speed pumping system |
US7854597B2 (en) | 2004-08-26 | 2010-12-21 | Pentair Water Pool And Spa, Inc. | Pumping system with two way communication |
US8469675B2 (en) * | 2004-08-26 | 2013-06-25 | Pentair Water Pool And Spa, Inc. | Priming protection |
US8602745B2 (en) | 2004-08-26 | 2013-12-10 | Pentair Water Pool And Spa, Inc. | Anti-entrapment and anti-dead head function |
US7845913B2 (en) * | 2004-08-26 | 2010-12-07 | Pentair Water Pool And Spa, Inc. | Flow control |
US8480373B2 (en) * | 2004-08-26 | 2013-07-09 | Pentair Water Pool And Spa, Inc. | Filter loading |
US7686589B2 (en) * | 2004-08-26 | 2010-03-30 | Pentair Water Pool And Spa, Inc. | Pumping system with power optimization |
US8281425B2 (en) | 2004-11-01 | 2012-10-09 | Cohen Joseph D | Load sensor safety vacuum release system |
JP4191669B2 (en) * | 2004-11-26 | 2008-12-03 | カシオ計算機株式会社 | Antenna, wristwatch, and antenna manufacturing method |
US7236692B2 (en) * | 2004-12-01 | 2007-06-26 | Balboa Instruments, Inc. | Spa heater system and methods for controlling |
US20060146462A1 (en) | 2005-01-04 | 2006-07-06 | Andy Hines | Enhanced safety stop device for pools and spas |
US20070258827A1 (en) | 2006-05-02 | 2007-11-08 | Daniel Gierke | Sump pump system |
US7931447B2 (en) | 2006-06-29 | 2011-04-26 | Hayward Industries, Inc. | Drain safety and pump control device |
US20080095638A1 (en) | 2006-10-13 | 2008-04-24 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
US7690897B2 (en) * | 2006-10-13 | 2010-04-06 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
US8104110B2 (en) * | 2007-01-12 | 2012-01-31 | Gecko Alliance Group Inc. | Spa system with flow control feature |
WO2010039580A1 (en) | 2008-10-01 | 2010-04-08 | A.O. Smith Corporation | Controller for a motor and a method of controlling the motor |
-
2006
- 2006-10-13 US US11/549,518 patent/US20080095638A1/en not_active Abandoned
-
2007
- 2007-10-09 EP EP07118126A patent/EP1911977A3/en not_active Ceased
- 2007-10-12 CA CA002606642A patent/CA2606642A1/en not_active Abandoned
-
2009
- 2009-07-21 US US12/506,417 patent/US20090290990A1/en not_active Abandoned
- 2009-07-21 US US12/506,372 patent/US8177519B2/en not_active Expired - Fee Related
Patent Citations (101)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1061919A (en) * | 1912-09-19 | 1913-05-13 | Clifford G Miller | Magnetic switch. |
US2767277A (en) * | 1952-12-04 | 1956-10-16 | James F Wirth | Control system for power operated fluid pumps |
US3191935A (en) * | 1962-07-02 | 1965-06-29 | Brunswick Corp | Pin detection means including electrically conductive and magnetically responsive circuit closing particles |
US3558910A (en) * | 1968-07-19 | 1971-01-26 | Motorola Inc | Relay circuits employing a triac to prevent arcing |
US3781925A (en) * | 1971-11-26 | 1974-01-01 | G Curtis | Pool water temperature control |
US3838597A (en) * | 1971-12-28 | 1974-10-01 | Mobil Oil Corp | Method and apparatus for monitoring well pumping units |
US3953777A (en) * | 1973-02-12 | 1976-04-27 | Delta-X Corporation | Control circuit for shutting off the electrical power to a liquid well pump |
US3963375A (en) * | 1974-03-12 | 1976-06-15 | Curtis George C | Time delayed shut-down circuit for recirculation pump |
US4021700A (en) * | 1975-06-04 | 1977-05-03 | Borg-Warner Corporation | Digital logic control system for three-phase submersible pump motor |
US4185187A (en) * | 1977-08-17 | 1980-01-22 | Rogers David H | Electric water heating apparatus |
US4168413A (en) * | 1978-03-13 | 1979-09-18 | Halpine Joseph C | Piston detector switch |
US4319712A (en) * | 1980-04-28 | 1982-03-16 | Ofer Bar | Energy utilization reduction devices |
US4371315A (en) * | 1980-09-02 | 1983-02-01 | International Telephone And Telegraph Corporation | Pressure booster system with low-flow shut-down control |
US4473338A (en) * | 1980-09-15 | 1984-09-25 | Garmong Victor H | Controlled well pump and method of analyzing well production |
US4370098A (en) * | 1980-10-20 | 1983-01-25 | Esco Manufacturing Company | Method and apparatus for monitoring and controlling on line dynamic operating conditions |
US4428434A (en) * | 1981-06-19 | 1984-01-31 | Gelaude Jonathon L | Automatic fire protection system |
US4504773A (en) * | 1981-09-10 | 1985-03-12 | Kureha Kagaku Kogyo Kabushiki Kaisha | Capacitor discharge circuit |
US4449260A (en) * | 1982-09-01 | 1984-05-22 | Whitaker Brackston T | Swimming pool cleaning method and apparatus |
US4541029A (en) * | 1982-10-06 | 1985-09-10 | Tsubakimoto Chain Co. | Over-load and light-load protection for electric machinery |
US4505643A (en) * | 1983-03-18 | 1985-03-19 | North Coast Systems, Inc. | Liquid pump control |
US4676914A (en) * | 1983-03-18 | 1987-06-30 | North Coast Systems, Inc. | Microprocessor based pump controller for backwashable filter |
US4998097A (en) * | 1983-07-11 | 1991-03-05 | Square D Company | Mechanically operated pressure switch having solid state components |
US4864287A (en) * | 1983-07-11 | 1989-09-05 | Square D Company | Apparatus and method for calibrating a motor monitor by reading and storing a desired value of the power factor |
US4758697A (en) * | 1983-11-04 | 1988-07-19 | Societe Internationale de Promotion Commerciale | Intermittent supply control device for electric appliances of in particular a hotel room |
US4514989A (en) * | 1984-05-14 | 1985-05-07 | Carrier Corporation | Method and control system for protecting an electric motor driven compressor in a refrigeration system |
US5324170A (en) * | 1984-12-31 | 1994-06-28 | Rule Industries, Inc. | Pump control apparatus and method |
US4695779A (en) * | 1986-05-19 | 1987-09-22 | Sargent Oil Well Equipment Company Of Dover Resources, Incorporated | Motor protection system and process |
US4907610B1 (en) * | 1986-08-15 | 1997-10-07 | Crystal Pools Inc | Cleaning system for swimming pools and the like |
US4907610A (en) * | 1986-08-15 | 1990-03-13 | Crystal Pools, Inc. | Cleaning system for swimming pools and the like |
US4837656A (en) * | 1987-02-27 | 1989-06-06 | Barnes Austen Bernard | Malfunction detector |
US4839571A (en) * | 1987-03-17 | 1989-06-13 | Barber-Greene Company | Safety back-up for metering pump control |
US5550753A (en) * | 1987-05-27 | 1996-08-27 | Irving C. Siegel | Microcomputer SPA control system |
US6253227B1 (en) * | 1987-05-27 | 2001-06-26 | Balboa Instruments, Inc. | Spa control system |
US5559720A (en) * | 1987-05-27 | 1996-09-24 | Irving C. Siegel | Spa control system |
US4781525A (en) * | 1987-07-17 | 1988-11-01 | Minnesota Mining And Manufacturing Company | Flow measurement system |
US4841404A (en) * | 1987-10-07 | 1989-06-20 | Spring Valley Associates, Inc. | Pump and electric motor protector |
US5079784A (en) * | 1989-02-03 | 1992-01-14 | Hydr-O-Dynamic Systems, Inc. | Hydro-massage tub control system |
US5100298A (en) * | 1989-03-07 | 1992-03-31 | Ebara Corporation | Controller for underwater pump |
US5347664A (en) * | 1990-06-20 | 1994-09-20 | Kdi American Products, Inc. | Suction fitting with pump control device |
US5234286A (en) * | 1992-01-08 | 1993-08-10 | Kenneth Wagner | Underground water reservoir |
US5930092A (en) * | 1992-01-17 | 1999-07-27 | Load Controls, Incorporated | Power monitoring |
US5632468A (en) * | 1993-02-24 | 1997-05-27 | Aquatec Water Systems, Inc. | Control circuit for solenoid valve |
US5422014A (en) * | 1993-03-18 | 1995-06-06 | Allen; Ross R. | Automatic chemical monitor and control system |
US6043461A (en) * | 1993-04-05 | 2000-03-28 | Whirlpool Corporation | Over temperature condition sensing method and apparatus for a domestic appliance |
US5548854A (en) * | 1993-08-16 | 1996-08-27 | Kohler Co. | Hydro-massage tub control system |
US5545012A (en) * | 1993-10-04 | 1996-08-13 | Rule Industries, Inc. | Soft-start pump control system |
US5624237A (en) * | 1994-03-29 | 1997-04-29 | Prescott; Russell E. | Pump overload control assembly |
US6768279B1 (en) * | 1994-05-27 | 2004-07-27 | Emerson Electric Co. | Reprogrammable motor drive and control therefore |
US5727933A (en) * | 1995-12-20 | 1998-03-17 | Hale Fire Pump Company | Pump and flow sensor combination |
US6059536A (en) * | 1996-01-22 | 2000-05-09 | O.I.A. Llc | Emergency shutdown system for a water-circulating pump |
US5777833A (en) * | 1996-02-02 | 1998-07-07 | Schneider Electric Sa | Electronic relay for calculating the power of a multiphase electric load based on a rectified wave signal and a phase current |
US5601413A (en) * | 1996-02-23 | 1997-02-11 | Great Plains Industries, Inc. | Automatic low fluid shut-off method for a pumping system |
US6199224B1 (en) * | 1996-05-29 | 2001-03-13 | Vico Products Mfg., Co. | Cleaning system for hydromassage baths |
US5633540A (en) * | 1996-06-25 | 1997-05-27 | Lutron Electronics Co., Inc. | Surge-resistant relay switching circuit |
US5947700A (en) * | 1997-07-28 | 1999-09-07 | Mckain; Paul C. | Fluid vacuum safety device for fluid transfer systems in swimming pools |
US6171073B1 (en) * | 1997-07-28 | 2001-01-09 | Mckain Paul C. | Fluid vacuum safety device for fluid transfer and circulation systems |
US6045333A (en) * | 1997-12-01 | 2000-04-04 | Camco International, Inc. | Method and apparatus for controlling a submergible pumping system |
US6616413B2 (en) * | 1998-03-20 | 2003-09-09 | James C. Humpheries | Automatic optimizing pump and sensor system |
US6342841B1 (en) * | 1998-04-10 | 2002-01-29 | O.I.A. Llc | Influent blockage detection system |
US6238188B1 (en) * | 1998-08-17 | 2001-05-29 | Carrier Corporation | Compressor control at voltage and frequency extremes of power supply |
US6590188B2 (en) * | 1998-09-03 | 2003-07-08 | Balboa Instruments, Inc. | Control system for bathers |
US6696676B1 (en) * | 1999-03-30 | 2004-02-24 | General Electric Company | Voltage compensation in combination oven using radiant and microwave energy |
US6354805B1 (en) * | 1999-07-12 | 2002-03-12 | Danfoss A/S | Method for regulating a delivery variable of a pump |
US6390781B1 (en) * | 1999-07-15 | 2002-05-21 | Itt Manufacturing Enterprises, Inc. | Spa pressure sensing system capable of entrapment detection |
US6522034B1 (en) * | 1999-09-03 | 2003-02-18 | Yazaki Corporation | Switching circuit and multi-voltage level power supply unit employing the same |
US6715996B2 (en) * | 2001-04-02 | 2004-04-06 | Danfoss Drives A/S | Method for the operation of a centrifugal pump |
US6543940B2 (en) * | 2001-04-05 | 2003-04-08 | Max Chu | Fiber converter faceplate outlet |
US6534940B2 (en) * | 2001-06-18 | 2003-03-18 | Smart Marine Systems, Llc | Marine macerator pump control module |
US6504338B1 (en) * | 2001-07-12 | 2003-01-07 | Varidigm Corporation | Constant CFM control algorithm for an air moving system utilizing a centrifugal blower driven by an induction motor |
US6676831B2 (en) * | 2001-08-17 | 2004-01-13 | Michael Lawrence Wolfe | Modular integrated multifunction pool safety controller (MIMPSC) |
US20040009075A1 (en) * | 2001-11-26 | 2004-01-15 | Meza Humberto V. | Pump and pump control circuit apparatus and method |
US6623245B2 (en) * | 2001-11-26 | 2003-09-23 | Shurflo Pump Manufacturing Company, Inc. | Pump and pump control circuit apparatus and method |
US20040064292A1 (en) * | 2002-09-27 | 2004-04-01 | Beck Thomas L. | Control system for centrifugal pumps |
US20040062658A1 (en) * | 2002-09-27 | 2004-04-01 | Beck Thomas L. | Control system for progressing cavity pumps |
US6933693B2 (en) * | 2002-11-08 | 2005-08-23 | Eaton Corporation | Method and apparatus of detecting disturbances in a centrifugal pump |
US20040090197A1 (en) * | 2002-11-08 | 2004-05-13 | Schuchmann Russell P. | Method and apparatus of detecting disturbances in a centrifugal pump |
US6709240B1 (en) * | 2002-11-13 | 2004-03-23 | Eaton Corporation | Method and apparatus of detecting low flow/cavitation in a centrifugal pump |
US20050097665A1 (en) * | 2003-04-16 | 2005-05-12 | Paramount Leisure Industries, Inc. | Hydraulic suction fuse for swimming pools |
US20060101571A1 (en) * | 2003-04-16 | 2006-05-18 | Paramount Leisure Industries, Inc. | Manually resettable hydraulic suction fuse for swimming pools |
US7213275B2 (en) * | 2003-04-16 | 2007-05-08 | Paramount Leisure Industries, Inc. | Float operated hydraulic suction fuse for swimming pools |
US7089606B2 (en) * | 2003-04-16 | 2006-08-15 | Paramount Leisure Industries, Inc. | Manually resettable hydraulic suction fuse for swimming pools |
US7055189B2 (en) * | 2003-04-16 | 2006-06-06 | Paramount Leisure Industries, Inc. | Hydraulic suction fuse for swimming pools |
US20060107453A1 (en) * | 2003-04-16 | 2006-05-25 | Paramount Leisure Industries, Inc. | Float operated hydraulic suction fuse for swimming pools |
US6895608B2 (en) * | 2003-04-16 | 2005-05-24 | Paramount Leisure Industries, Inc. | Hydraulic suction fuse for swimming pools |
US6941785B2 (en) * | 2003-05-13 | 2005-09-13 | Ut-Battelle, Llc | Electric fuel pump condition monitor system using electrical signature analysis |
US6732387B1 (en) * | 2003-06-05 | 2004-05-11 | Belvedere Usa Corporation | Automated pedicure system |
US20050158177A1 (en) * | 2003-07-09 | 2005-07-21 | A.O. Smith Corporation | Switch assembly, electric machine having the switch assembly, and method of controlling the same |
US7163380B2 (en) * | 2003-07-29 | 2007-01-16 | Tokyo Electron Limited | Control of fluid flow in the processing of an object with a fluid |
US20050123408A1 (en) * | 2003-12-08 | 2005-06-09 | Koehl Robert M. | Pump control system and method |
US20050133088A1 (en) * | 2003-12-19 | 2005-06-23 | Zorba, Agio & Bologeorges, L.P. | Solar-powered water features with submersible solar cells |
US20060045750A1 (en) * | 2004-08-26 | 2006-03-02 | Pentair Pool Products, Inc. | Variable speed pumping system and method |
US20090035151A1 (en) * | 2005-04-08 | 2009-02-05 | Ebara Corporation | Vacuum pump self-diagnosis method, vacuum pump self-diagnosis system, and vacuum pump central monitoring system |
US7417834B2 (en) * | 2005-04-22 | 2008-08-26 | Balboa Instruments, Inc. | Shutoff system for pool or spa |
US20070177985A1 (en) * | 2005-07-21 | 2007-08-02 | Walls James C | Integral sensor and control for dry run and flow fault protection of a pump |
US20070058315A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070056956A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070056955A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070058314A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070058313A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070061051A1 (en) * | 2005-09-09 | 2007-03-15 | Maddox Harold D | Controlling spas |
US20070160480A1 (en) * | 2006-01-06 | 2007-07-12 | Itt Industries | No water / dead head detection pump protection algorithm |
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Also Published As
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CA2606642A1 (en) | 2008-04-13 |
US8177519B2 (en) | 2012-05-15 |
EP1911977A3 (en) | 2011-01-19 |
EP1911977A2 (en) | 2008-04-16 |
US20090280014A1 (en) | 2009-11-12 |
US20090290990A1 (en) | 2009-11-26 |
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