US3611017A - Regulated magnetron power supply - Google Patents

Regulated magnetron power supply Download PDF

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Publication number
US3611017A
US3611017A US18060A US3611017DA US3611017A US 3611017 A US3611017 A US 3611017A US 18060 A US18060 A US 18060A US 3611017D A US3611017D A US 3611017DA US 3611017 A US3611017 A US 3611017A
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US
United States
Prior art keywords
lamp
magnetron
power supply
photocell
glow
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Expired - Lifetime
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US18060A
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Royden R Freeland
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INT CRYSTAL Mfg CO
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INT CRYSTAL Mfg CO
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B9/00—Generation of oscillations using transit-time effects
    • H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
    • H03B9/10—Generation of oscillations using transit-time effects using discharge tubes using a magnetron
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
    • G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H02M1/092—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/902—Optical coupling to semiconductor

Definitions

  • TRIM 40662 26 VOLTAGE ADJUST F A l MAGNETRON References Cited UNlTED STATES PATENTS 3,414,798 12/1968 Nielsen Primary Examiner-John Kominski Attorney-Stevens, Davis, Miller & Mosher ABSTRACT: A means for regulating a magnetron power supply in which a portion of the magnetron power is used to energize a lamp. As the power increases the lamp will glow brighter. A photocell senses the glow of the lamp to decrease in resistance as the lamp glows brighter. The photocell is in the circuit of the transformer primary where its changing resistance will cause a correction in the voltage being fed to the magnetron.
  • the present invention has for its object to provide a means for controlling the magnetron wherein as magnetron current increases, a lamp in the magnetron circuit glows brighter and the luminescence of this lamp is detected by a photocell in the transformer primary circuit. The resistance of the photocell decreases as the lamp glows brighter and thus lowers the voltage in the transformer primary through a triac circuit.
  • the magnetron itself is generally designated within the dashed block H).
  • An input transformer 11 having a primary winding 12 and a secondary winding 13 is connected between a source of AC voltage, not shown, and the primary winding.
  • the secondary is connected through a rectifier 14 to the magnetron and to an adjustable resistor 15 to ground.
  • a lamp 16 is connected across the resistor 15 and is in optical relation with a photocell l7.
  • the photocell is in a diae-triac circuit in the circuit connected to the primary of the transformer and includes a triac 18, a diac 19. a voltage adjustable resistor 20 and resistors 21, 22, 23, 24 and capacitors Z5, 26, 27, 2B and an inductance 29.
  • the level at which the lamp 16 will glow is adjusted by the variable resistor 15.
  • the voltage supplied to the primary winding of the transformer can be adjusted by the adjustable resistor 20.
  • the adjusted lamp [6 will glow with an increasing intensity. This increasing intensity of the lamp will be detected by the photocell 17 which in turn will decrease in its resistance thus lowering the voltage delivered to the transformer primary through the triac circuit.
  • a controlled power supply circuit for a magnetron comprising an input, a transformer the primary of which is con nected to said input, a rectifier connected to the secondary of said transformer, a lamp and said magnetron connected to said rectifier with said lamp glowing with an intensity responsive to magnetron current, photocell means in optical alignment with said lamp and which changes its resistance respon sive to the intensity of the glow of said lamp, voltage control means connected to said input and said photocell and being responsive to change in the resistance of said photocell to cor rect the voltage to said transfonner primary supplying power to said magnetron.
  • a controlled power supply circuit according to claim I further comprising means to adjust the intensity of the mag netron current at which said lamp will begin to glow.
  • a controlled power supply circuit according to claim 1 wherein said voltage control means comprises a triac-disc circuit.

Abstract

A means for regulating a magnetron power supply in which a portion of the magnetron power is used to energize a lamp. As the power increases the lamp will glow brighter. A photocell senses the glow of the lamp to decrease in resistance as the lamp glows brighter. The photocell is in the circuit of the transformer primary where its changing resistance will cause a correction in the voltage being fed to the magnetron.

Description

United States Patent Inventor Royden ll. Freeland Oklahoma City, Okla.
App]. No. 18,060
Filed Mar. 10, 1970 Patented Oct. 5, 1971 Assignee International Crystal Manulacturlng Company Oklahoma City, Okla.
REGULATED MAGNETRON POWER SUPPLY 3 Claims, I Drawing Flg.
U.S.Cl SIS/I07, 3l$/l58,315/279,33l/66,33l/86,33l/l86. 321/24, 323/21, 323/24 Int. Cl "02m 7/12 FieldolSearch 3l5/l07,
TRIM) 40662 26 VOLTAGE ADJUST F A l MAGNETRON References Cited UNlTED STATES PATENTS 3,414,798 12/1968 Nielsen Primary Examiner-John Kominski Attorney-Stevens, Davis, Miller & Mosher ABSTRACT: A means for regulating a magnetron power supply in which a portion of the magnetron power is used to energize a lamp. As the power increases the lamp will glow brighter. A photocell senses the glow of the lamp to decrease in resistance as the lamp glows brighter. The photocell is in the circuit of the transformer primary where its changing resistance will cause a correction in the voltage being fed to the magnetron.
REGULATION ADJUST IGILUIY PATENTED um 5:97:
, INVENTOR ROYDEN R. FREELAND Towns 20 F lllllllll lllll IIL REGULATED MAGNETRON POWER SUPPLY DISCLOSURE It is well known in the art relating to magnetrons that it is necessary for the anode voltage of the magnetron to remain substantially steady in order to obtain the proper functioning of the magnetron. The present invention has for its object to provide a means for controlling the magnetron wherein as magnetron current increases, a lamp in the magnetron circuit glows brighter and the luminescence of this lamp is detected by a photocell in the transformer primary circuit. The resistance of the photocell decreases as the lamp glows brighter and thus lowers the voltage in the transformer primary through a triac circuit.
It is another object of the present invention to provide a device which may be readily and economically produced.
The means for accomplishing the foregoing objects and other advantages, which will be apparent to those skilled in the art, are set forth in the following specification and claims and are illustrated in the accompanying drawing dealing with a basic embodiment of the present invention. Reference is made now to drawing in which the single figure is an electrical schematic of the present invention.
The magnetron itself is generally designated within the dashed block H). An input transformer 11 having a primary winding 12 and a secondary winding 13 is connected between a source of AC voltage, not shown, and the primary winding. The secondary is connected through a rectifier 14 to the magnetron and to an adjustable resistor 15 to ground. A lamp 16 is connected across the resistor 15 and is in optical relation with a photocell l7. The photocell is in a diae-triac circuit in the circuit connected to the primary of the transformer and includes a triac 18, a diac 19. a voltage adjustable resistor 20 and resistors 21, 22, 23, 24 and capacitors Z5, 26, 27, 2B and an inductance 29.
It is readily apparent from the drawing that the level at which the lamp 16 will glow is adjusted by the variable resistor 15. Also, the voltage supplied to the primary winding of the transformer can be adjusted by the adjustable resistor 20. As the magnetron current increases, the adjusted lamp [6 will glow with an increasing intensity. This increasing intensity of the lamp will be detected by the photocell 17 which in turn will decrease in its resistance thus lowering the voltage delivered to the transformer primary through the triac circuit.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore to be embraced therein.
lclaim:
l. A controlled power supply circuit for a magnetron comprising an input, a transformer the primary of which is con nected to said input, a rectifier connected to the secondary of said transformer, a lamp and said magnetron connected to said rectifier with said lamp glowing with an intensity responsive to magnetron current, photocell means in optical alignment with said lamp and which changes its resistance respon sive to the intensity of the glow of said lamp, voltage control means connected to said input and said photocell and being responsive to change in the resistance of said photocell to cor rect the voltage to said transfonner primary supplying power to said magnetron.
2. A controlled power supply circuit according to claim I further comprising means to adjust the intensity of the mag netron current at which said lamp will begin to glow.
3. A controlled power supply circuit according to claim 1 wherein said voltage control means comprises a triac-disc circuit.

Claims (3)

1. A controlled power supply circuit for a magnetron comprising an input, a transformer the primary of which is connected to said input, a rectifier connected to the secondary of said transformer, a lamp and said magnetron connected to said rectifier with said lamp glowing with an intensity responsive to magnetron current, photocell means in optical alignment with said lamp and which changes its resistance responsive to the intensity of the glow of said lamp, voltage control means connected to said input and said photocell and being responsive to change in the resistance of said photocell to correct the voltage to said transformer primary supplying power to said magnetron.
2. A controlled power supply circuit according to claim 1 further comprising means to adjust the intensity of the magnetron current at which said lamp will begin to glow.
3. A controlled power supply circuit according to claim 1 wherein said voltage control means comprises a triac-diac circuit.
US18060A 1970-03-10 1970-03-10 Regulated magnetron power supply Expired - Lifetime US3611017A (en)

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671849A (en) * 1971-06-21 1972-06-20 Floyd E Kingston Three-phase power controller
US3731183A (en) * 1971-09-29 1973-05-01 Inductotherm Corp Power control and phase angle correcting apparatus
JPS4966303U (en) * 1972-09-25 1974-06-10
JPS4965102A (en) * 1972-10-24 1974-06-24
US4012617A (en) * 1975-07-24 1977-03-15 Litton Systems, Inc. Power controller for microwave magnetron
US4125751A (en) * 1976-12-30 1978-11-14 Raytheon Company Microwave oven control circuit
DE2808498A1 (en) * 1978-02-28 1979-08-30 Licentia Gmbh Delay network pulse modulator for magnetron radar transmitter - has resonance charging and controlled switching circuits parallel to charging choke
US4268779A (en) * 1979-08-13 1981-05-19 General Electric Company Circuit for controlling current flow from an A.C. source to a load
US4394613A (en) * 1981-01-19 1983-07-19 California Institute Of Technology Full-charge indicator for battery chargers
US4398132A (en) * 1979-12-26 1983-08-09 Razin Gennady I Electron beam current stabilizing device
US4420668A (en) * 1981-06-25 1983-12-13 Litton Systems, Inc. Constant power microwave oven
US4495554A (en) * 1983-03-28 1985-01-22 International Business Machines Corporation Isolated power supply feedback
EP0147097A2 (en) * 1983-12-30 1985-07-03 AMP INCORPORATED (a New Jersey corporation) Fiber optic switching device
US4939330A (en) * 1986-07-04 1990-07-03 Alfastar Ab Method and arrangement for controlling output power of a plurality of magnetrons connected to a common power source
FR2668321A1 (en) * 1990-10-23 1992-04-24 Dassault Electronique MICROWAVE TRANSMISSION DEVICE.
US5171949A (en) * 1989-12-29 1992-12-15 Sanyo Electric Co., Ltd. Switching power supply for microwave oven
DE4425842A1 (en) * 1994-07-21 1996-02-01 Ant Nachrichtentech Cathode current regulator for TWT
EP1354386A1 (en) * 2001-01-03 2003-10-22 Fusion Uv Systems, Inc. Dual magnetrons powered by a single power supply

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414798A (en) * 1966-09-01 1968-12-03 Anchor Coupling Co Inc Constant voltage power supply utilizing independent reference and control circuits coupled to each other by an optical link

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3414798A (en) * 1966-09-01 1968-12-03 Anchor Coupling Co Inc Constant voltage power supply utilizing independent reference and control circuits coupled to each other by an optical link

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3671849A (en) * 1971-06-21 1972-06-20 Floyd E Kingston Three-phase power controller
US3731183A (en) * 1971-09-29 1973-05-01 Inductotherm Corp Power control and phase angle correcting apparatus
JPS4966303U (en) * 1972-09-25 1974-06-10
JPS4965102A (en) * 1972-10-24 1974-06-24
US4012617A (en) * 1975-07-24 1977-03-15 Litton Systems, Inc. Power controller for microwave magnetron
US4125751A (en) * 1976-12-30 1978-11-14 Raytheon Company Microwave oven control circuit
DE2808498A1 (en) * 1978-02-28 1979-08-30 Licentia Gmbh Delay network pulse modulator for magnetron radar transmitter - has resonance charging and controlled switching circuits parallel to charging choke
US4268779A (en) * 1979-08-13 1981-05-19 General Electric Company Circuit for controlling current flow from an A.C. source to a load
US4398132A (en) * 1979-12-26 1983-08-09 Razin Gennady I Electron beam current stabilizing device
US4394613A (en) * 1981-01-19 1983-07-19 California Institute Of Technology Full-charge indicator for battery chargers
US4420668A (en) * 1981-06-25 1983-12-13 Litton Systems, Inc. Constant power microwave oven
US4495554A (en) * 1983-03-28 1985-01-22 International Business Machines Corporation Isolated power supply feedback
EP0147097A2 (en) * 1983-12-30 1985-07-03 AMP INCORPORATED (a New Jersey corporation) Fiber optic switching device
EP0147097A3 (en) * 1983-12-30 1985-08-21 AMP INCORPORATED (a New Jersey corporation) Fiber optic switching device
US4939330A (en) * 1986-07-04 1990-07-03 Alfastar Ab Method and arrangement for controlling output power of a plurality of magnetrons connected to a common power source
US5171949A (en) * 1989-12-29 1992-12-15 Sanyo Electric Co., Ltd. Switching power supply for microwave oven
FR2668321A1 (en) * 1990-10-23 1992-04-24 Dassault Electronique MICROWAVE TRANSMISSION DEVICE.
EP0482967A1 (en) * 1990-10-23 1992-04-29 Dassault Electronique High frequency transmitting device
DE4425842A1 (en) * 1994-07-21 1996-02-01 Ant Nachrichtentech Cathode current regulator for TWT
EP1354386A1 (en) * 2001-01-03 2003-10-22 Fusion Uv Systems, Inc. Dual magnetrons powered by a single power supply
EP1354386A4 (en) * 2001-01-03 2006-10-04 Fusion Uv Sys Inc Dual magnetrons powered by a single power supply

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