US20110070098A1 - Fan control system - Google Patents
Fan control system Download PDFInfo
- Publication number
- US20110070098A1 US20110070098A1 US12/767,312 US76731210A US2011070098A1 US 20110070098 A1 US20110070098 A1 US 20110070098A1 US 76731210 A US76731210 A US 76731210A US 2011070098 A1 US2011070098 A1 US 2011070098A1
- Authority
- US
- United States
- Prior art keywords
- micro controller
- signal
- control system
- fan
- logic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 230000007257 malfunction Effects 0.000 abstract description 12
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
-
- 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
- H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention relates to a fan control system. The fan control system includes a first micro controller, a second micro controller and a first logic circuit. The first micro controller provides at least one first control signal. The second micro controller is connected to the first micro controller. The second micro controller detects operational status of the first micro controller, and provides at least one second control signal. The first logic circuit receives the first control signal and the second control signal to process logic operation and to generate at least one driving signal to fan. The fan control system of the invention utilizes two micro controllers, when one of the two micro controllers malfunctions, the first logic circuit allows the other micro controller to continue proper operation of the fan, thereby preventing the problem of insufficient heat dissipation that results from malfunction of the single micro controller of a conventional fan control system.
Description
- 1. Field of the Invention
- The present invention relates to a control system, and more particularly, to a fan control system.
- 2. Description of the Related Art
-
FIG. 1 shows a schematic block diagram of a conventional fan control system. Theconventional control system 10 includes amicro controller 11 for providing pulse width modulation (PWM) signals to afan assembly 12. Thefan assembly 12 includes a plurality of fans for dissipating heat. Because theconventional control system 10 has only amicro controller 11, when themicro controller 11 malfunctions and cannot provide PWM signals to thefan assembly 12, the fans in thefan assembly 12 cannot work to dissipate heat from the whole system, causing the whole system to become unstable and fail to work properly. - Therefore, it is necessary to provide a fan control system to solve the above problem.
- The present invention provides a fan control system, comprising: a first micro controller, a second micro controller and a first logic circuit. The first micro controller provides at least one first control signal. The second micro controller is connected to the first micro controller. The second micro controller detects the operational status of the first micro controller, and provides at least one second control signal. The first logic circuit receives the first control signal and the second control signal to process logical operations and to generate at least one driving signal to at least one fan.
- The fan control system of the invention utilizes two micro controllers. When one of the two micro controllers malfunctions, the first logic circuit allows the other micro controller to continue proper operation of the fan, thereby preventing the problem of insufficient heat dissipation that results from malfunction of the single micro controller of a conventional fan control system. Furthermore, each of the two micro controllers can detect the operational status of the other so that when one of the two micro controllers malfunctions, an alarm is actuated to alert users to the need for repair.
-
FIG. 1 is a schematic block diagram of a conventional fan control system; and -
FIG. 2 is a schematic block diagram of the fan control system according to the present invention. -
FIG. 2 is a schematic block diagram of the fan control system according to the present invention. Thefan control system 20 of the invention comprises: a firstmicro controller 21, a secondmicro controller 22 and afirst logic circuit 23. The firstmicro controller 21 provides at least one first control signal to thefirst logic circuit 23. In this embodiment, the first control signal serves as a first pulse width modulation signal. - The second
micro controller 22 is connected to the firstmicro controller 21. The secondmicro controller 22 detects the operational status of the firstmicro controller 21, and provides at least one second control signal to thefirst logic circuit 23. Thefirst logic circuit 23 receives the first and second control signals to process logic operations and to generate at least one driving signal to at least one fan. In this embodiment, the fan is afan assembly 30 comprising twelve fans. - In this embodiment, the
first logic circuit 23 is a logic OR circuit to process a logical OR operation on the first and second control signals. The first control signal serves as the first pulse width modulation signal. When the secondmicro controller 22 detects the firstmicro controller 21 under normal operating conditions, and the second control signal serves as a low logic level signal (L). After the logical OR operation of thefirst logic circuit 23, the driving signal serves as the first pulse width modulation signal. - When the second
micro controller 22 detects the firstmicro controller 21 under abnormal operating conditions, the second control signal serves as a high logic level signal (H). After the logical OR operation of thefirst logic circuit 23, the driving signal serves as the high logic level signal (H). That is, when the firstmicro controller 21 malfunctions, the first control signal is unknown. Thus, the second control signal is set to serve as the high logic level signal (H) so that the fans continue to operate in full speed, thus avoiding the problem of insufficient heat dissipation that would otherwise result from fan failure. - In another embodiment, the first control signal serves as a first pulse width modulation signal. When the second
micro controller 22 detects the firstmicro controller 21 under normal operating conditions, the second control signal serves as a low logic level signal (L) so that the driving signal serves as the first pulse width modulation signal. When the secondmicro controller 22 detects the firstmicro controller 21 under abnormal operating conditions, the second control signal serves as a second pulse width modulation signal so that the driving signal serves as the second pulse width modulation signal. - That is, when the first
micro controller 21 malfunctions, if the firstmicro controller 21 cannot work, and cannot provide the first control signal. Thus, the secondmicro controller 22 replaces the firstmicro controller 21 to take the control power, and the second control signal serves as the second pulse width modulation signal to make the fans work normally, thus avoiding the problem of insufficient heat dissipation that would otherwise result from fan failure. - The
fan control system 20 of the invention further comprises a rotatingspeed detector 26 for detecting the rotating speed of thefan assembly 30 and for generating at least one rotating speed signal to the secondmicro controller 22. The secondmicro controller 22 transmits the rotating speed signal to the firstmicro controller 21. According to the rotating speed signal, the firstmicro controller 21 can adjust the first control signal, or the secondmicro controller 22 can adjust the second control signal so as to control the rotating speed of thefan assembly 30 to be a predetermined speed. - The
fan control system 20 of the invention further comprises asecond logic circuit 24 and analarm 25, wherein the firstmicro controller 21 further provides at least one first alarm signal to thesecond logic circuit 24, the secondmicro controller 22 further provides at least one second alarm signal to thesecond logic circuit 24. Thesecond logic circuit 24 receives the first alarm signal and the second alarm signal to process logic operation and to generate at least one actuating signal to thealarm 25. - In this embodiment, the
second logic circuit 24 is a logic OR circuit. When one of the firstmicro controller 21 or the secondmicro controller 22 malfunctions, thesecond logic circuit 24 processes logical OR operation on the first alarm signal and the second alarm signal to generate the actuating signal to actuate thealarm 25. In this embodiment, the alarm can be a warning light or warning buzzer. - The first
micro controller 21 further comprises a firstcommunicating interface 211, and the secondmicro controller 22 further comprises a secondcommunicating interface 221, the firstcommunicating interface 211 and the secondcommunicating interface 221 connects to detect the operational status of the other. When the firstmicro controller 21 detects the secondmicro controller 22 under abnormal operating conditions, the firstmicro controller 21 provides the first alarm signal to actuate thealarm 25. When the secondmicro controller 22 detects the firstmicro controller 21 under abnormal operating conditions, the secondmicro controller 22 provides the second alarm signal to actuate thealarm 25. - Therefore, the fan control system of the invention utilizes two micro controllers. When one of the two micro controllers malfunctions, the first logic circuit allows the other micro controller to continue proper operation of the fan, thereby preventing the problem of insufficient heat dissipation that results from malfunction of the single micro controller of a conventional fan control system. Furthermore, each of the two micro controllers can detect the operational status of the other so that when one of the two micro controllers malfunctions, an alarm is actuated to alert users to the need for repair.
- While the embodiment of the present invention have been illustrated and described, various modifications and improvements can be made by those skilled in the art. The embodiments of the present invention are therefore described in an illustrative but not restrictive sense. It is intended that the present invention may not be limited to the particular forms as illustrated, and that all modifications that maintain the spirit and scope of the present invention are within the scope as defined in the appended claims.
Claims (8)
1. A fan control system, comprising:
a first micro controller, for providing at least one first control signal;
a second micro controller, for connecting the first micro controller and for detecting operational status of the first micro controller, the second micro controller for providing at least one second control signal; and
a first logic circuit, for receiving the first control signal and the second control signal to process logic operation and to generate at least one driving signal to at least one fan.
2. The fan control system according to claim 1 , wherein the first logic circuit is a logic OR circuit.
3. The fan control system according to claim 2 , wherein the first control signal is a first pulse width modulation signal, when the second micro controller detects the first micro controller under normal operating conditions, the second control signal serves as a low logic level signal so that the driving signal serves as the first pulse width modulation signal; when the second micro controller detects the first micro controller under abnormal operating conditions, the second control signal serves as a high logic level signal so that the driving signal serves as the high logic level signal.
4. The fan control system according to claim 2 , wherein the first control signal is a first pulse width modulation signal, when the second micro controller detects the first micro controller under normal operating conditions, the second control signal serves as a low logic level signal so that the driving signal serves as the first pulse width modulation signal; when the second micro controller detects the first micro controller under abnormal operating conditions, the second control signal serves as a second pulse width modulation signal so that the driving signal serves as the second pulse width modulation signal.
5. The fan control system according to claim 1 , further comprising a rotating speed detector for detecting the rotating speed of the fan and for generating at least one rotating speed signal to the second micro controller, the second micro controller transmits the rotating speed signal to the first micro controller.
6. The fan control system according to claim 1 , further comprising a second logic circuit and an alarm, wherein the first micro controller is used for further providing at least one first alarm signal to the second logic circuit, the second micro controller is used for further providing at least one second alarm signal to the second logic circuit, the second logic circuit receives the first alarm signal and the second alarm signal to process logic operation and to generate at least one actuating signal to the alarm.
7. The fan control system according to claim 6 , wherein the second logic circuit is a logic OR circuit, when one of the first micro controller or the second micro controller is under abnormal operating conditions, the second logic circuit processes logical OR operation on the first alarm signal and the second alarm signal to generate the actuating signal to actuate the alarm.
8. The fan control system according to claim 7 , wherein the first micro controller further comprises a first communicating interface, and the second micro controller further comprises a second communicating interface, the first communicating interface and the second communicating interface connects to detect the operational status of the first micro controller and the second micro controller.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW098131448 | 2009-09-18 | ||
TW098131448A TWI413358B (en) | 2009-09-18 | 2009-09-18 | Used for fan control systems |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110070098A1 true US20110070098A1 (en) | 2011-03-24 |
Family
ID=43756775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/767,312 Abandoned US20110070098A1 (en) | 2009-09-18 | 2010-04-26 | Fan control system |
Country Status (2)
Country | Link |
---|---|
US (1) | US20110070098A1 (en) |
TW (1) | TWI413358B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140142764A1 (en) * | 2012-11-20 | 2014-05-22 | Inventec Corporation | Fan rotational speed control system and method for controlling rotational speed of fan |
US20140188284A1 (en) * | 2012-12-29 | 2014-07-03 | Hon Hai Precision Industry Co., Ltd. | Fan control system for shipping container |
CN103970632A (en) * | 2014-05-27 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | Method for restoring default fan rotating speed of Smart Rack cabinet |
EP3056829A1 (en) * | 2015-02-11 | 2016-08-17 | Electrolux Appliances Aktiebolag | Method for checking the functions of a plurality of fans |
WO2016184231A1 (en) * | 2015-05-18 | 2016-11-24 | 中兴通讯股份有限公司 | Method of controlling fan rotation speed via fan board and device utilizing same |
CN111271308A (en) * | 2020-01-19 | 2020-06-12 | 珠海格力电器股份有限公司 | Multi-fan control method, multi-fan system, main controller and chip circuit thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107575414A (en) * | 2017-10-27 | 2018-01-12 | 郑州云海信息技术有限公司 | A kind of fan control protection circuit and guard method |
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US5115388A (en) * | 1990-02-26 | 1992-05-19 | Fuji Electric Co., Ltd. | Temperature response protection circuit for bridge inverter |
JPH05167281A (en) * | 1991-12-17 | 1993-07-02 | Toshiba Corp | Cooling fan unit |
US6368064B1 (en) * | 2000-12-01 | 2002-04-09 | 3Com Corporation | Apparatus and method of providing redundant power and redundant fan speed control to a plurality of fans |
US20030137267A1 (en) * | 1999-12-23 | 2003-07-24 | John Blake | Fan speed control system |
US20030188222A1 (en) * | 2002-03-29 | 2003-10-02 | International Business Machines Corporation | Fail-over control in a computer system having redundant service processors |
US20040130868A1 (en) * | 2003-01-08 | 2004-07-08 | Schwartz William H. | Cooling system including redundant fan controllers |
US20050066672A1 (en) * | 2003-09-25 | 2005-03-31 | Kabushiki Kaisha Toshiba | Electronic apparatus that allows cooling fan to be driven with certainty even at the time of software malfunction/lock-up or at the time of controller failure |
US20050257213A1 (en) * | 2004-05-14 | 2005-11-17 | International Business Machines Corporation | Management module failover across multiple blade center chassis |
US20070101193A1 (en) * | 1997-05-13 | 2007-05-03 | Johnson Karl S | Diagnostic and managing distributed processor system |
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US20090312874A1 (en) * | 2008-06-11 | 2009-12-17 | Advanced Micro Devices Inc. | Apparatus and Method for Providing Cooling to Multiple Components |
US20100123987A1 (en) * | 2008-11-18 | 2010-05-20 | Pietrzyk Arthur P | Apparatus for Fault Tolerant Digital Outputs |
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TW200712915A (en) * | 2005-09-15 | 2007-04-01 | Asustek Comp Inc | Electronic device capable of detecting an object and method thereof |
-
2009
- 2009-09-18 TW TW098131448A patent/TWI413358B/en active
-
2010
- 2010-04-26 US US12/767,312 patent/US20110070098A1/en not_active Abandoned
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US5115388A (en) * | 1990-02-26 | 1992-05-19 | Fuji Electric Co., Ltd. | Temperature response protection circuit for bridge inverter |
JPH05167281A (en) * | 1991-12-17 | 1993-07-02 | Toshiba Corp | Cooling fan unit |
US20070101193A1 (en) * | 1997-05-13 | 2007-05-03 | Johnson Karl S | Diagnostic and managing distributed processor system |
US20030137267A1 (en) * | 1999-12-23 | 2003-07-24 | John Blake | Fan speed control system |
US6368064B1 (en) * | 2000-12-01 | 2002-04-09 | 3Com Corporation | Apparatus and method of providing redundant power and redundant fan speed control to a plurality of fans |
US20030188222A1 (en) * | 2002-03-29 | 2003-10-02 | International Business Machines Corporation | Fail-over control in a computer system having redundant service processors |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140142764A1 (en) * | 2012-11-20 | 2014-05-22 | Inventec Corporation | Fan rotational speed control system and method for controlling rotational speed of fan |
US20140188284A1 (en) * | 2012-12-29 | 2014-07-03 | Hon Hai Precision Industry Co., Ltd. | Fan control system for shipping container |
US9488991B2 (en) * | 2012-12-29 | 2016-11-08 | Shenzhen Treasure City Technology Co., Ltd. | Fan control system for shipping container |
CN103970632A (en) * | 2014-05-27 | 2014-08-06 | 浪潮电子信息产业股份有限公司 | Method for restoring default fan rotating speed of Smart Rack cabinet |
EP3056829A1 (en) * | 2015-02-11 | 2016-08-17 | Electrolux Appliances Aktiebolag | Method for checking the functions of a plurality of fans |
WO2016128236A1 (en) * | 2015-02-11 | 2016-08-18 | Electrolux Appliances Aktiebolag | Method for checking the functions of a plurality of fans |
CN107208916A (en) * | 2015-02-11 | 2017-09-26 | 伊莱克斯家用电器股份公司 | For the method for the function of checking multiple fans |
US10584708B2 (en) | 2015-02-11 | 2020-03-10 | Electrolux Appliances Aktiebolag | Method for checking the functions of a plurality of fans |
WO2016184231A1 (en) * | 2015-05-18 | 2016-11-24 | 中兴通讯股份有限公司 | Method of controlling fan rotation speed via fan board and device utilizing same |
CN106286357A (en) * | 2015-05-18 | 2017-01-04 | 中兴通讯股份有限公司 | A kind of fan board fan rotational frequency control method and device |
CN111271308A (en) * | 2020-01-19 | 2020-06-12 | 珠海格力电器股份有限公司 | Multi-fan control method, multi-fan system, main controller and chip circuit thereof |
Also Published As
Publication number | Publication date |
---|---|
TWI413358B (en) | 2013-10-21 |
TW201112610A (en) | 2011-04-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SUNONWEALTH ELECTRIC MACHINE INDUSTRY CO., LTD., T Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HORNG, ALEX;CHEN, CHIA-HUNG;CHENG, CHUNG-KEN;REEL/FRAME:024289/0211 Effective date: 20100422 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |