EP0248669A3 - Power supply circuits for magnetrons - Google Patents

Power supply circuits for magnetrons Download PDF

Info

Publication number
EP0248669A3
EP0248669A3 EP87304959A EP87304959A EP0248669A3 EP 0248669 A3 EP0248669 A3 EP 0248669A3 EP 87304959 A EP87304959 A EP 87304959A EP 87304959 A EP87304959 A EP 87304959A EP 0248669 A3 EP0248669 A3 EP 0248669A3
Authority
EP
European Patent Office
Prior art keywords
inductor
supply
power supply
high frequency
supply circuits
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.)
Withdrawn
Application number
EP87304959A
Other languages
German (de)
French (fr)
Other versions
EP0248669A2 (en
Inventor
David Gurwicz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electrolux AB
Original Assignee
Electrolux AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electrolux AB filed Critical Electrolux AB
Publication of EP0248669A2 publication Critical patent/EP0248669A2/en
Publication of EP0248669A3 publication Critical patent/EP0248669A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/66—Circuits
    • H05B6/68—Circuits for monitoring or control

Abstract

This invention relates to power supply circuits for example, for driving a magnetron employed in a microwave cooker. In more detail the power supply circuit of the invention comprises an inductor, a high frequency switch connected in series with the inductor the series arrangement of the inductor and switch being adapted for connection to a pulsating d.c. supply derived from a rectified a.c. supply without addition of smoothing means, and a path in which is disposed a load and which provides a unifirectional conductive path for energy in the inductor during periods when, in operation, the inductor is disconnected from the d.c. supply, the high frequency switch being adapted to connect the inductor to the d.c. supply when the current in the inductor falls to zero so that the power supply takes from the a.c. supply at any given constant frequency of switching a current ave from which is in phase with and of the same harmonic content as the corresponding part of the a.c. voltage supply wave form.
EP87304959A 1986-06-04 1987-06-04 Power supply circuits for magnetrons Withdrawn EP0248669A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8613567 1986-06-04
GB868613567A GB8613567D0 (en) 1986-06-04 1986-06-04 Power supply circuits

Publications (2)

Publication Number Publication Date
EP0248669A2 EP0248669A2 (en) 1987-12-09
EP0248669A3 true EP0248669A3 (en) 1989-03-29

Family

ID=10598925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304959A Withdrawn EP0248669A3 (en) 1986-06-04 1987-06-04 Power supply circuits for magnetrons

Country Status (3)

Country Link
EP (1) EP0248669A3 (en)
JP (1) JPS6332832A (en)
GB (1) GB8613567D0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000040056A1 (en) * 1998-12-23 2000-07-06 United Automation Limited Magnetron controller with transformer controlling the inrush current
FR2880235B1 (en) * 2004-12-23 2007-03-30 Satelec Soc GAS PLASMA STERILIZATION DEVICE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284976A1 (en) * 1974-09-10 1976-04-09 Matsushita Electric Ind Co Ltd POWER SUPPLY MEANS FOR A MAGNETRON
FR2324116A1 (en) * 1975-09-12 1977-04-08 Matsushita Electric Ind Co Ltd POWER SOURCE FOR MAGNETRON
DE2728616A1 (en) * 1976-07-23 1978-01-26 Hitachi Ltd POWER SUPPLY ARRANGEMENT
US4281372A (en) * 1979-10-22 1981-07-28 General Electric Company Power supply for magnetron and the like loads
US4302651A (en) * 1977-11-30 1981-11-24 Varo Semiconductor, Inc. High-voltage SCR circuit for microwave oven and the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284976A1 (en) * 1974-09-10 1976-04-09 Matsushita Electric Ind Co Ltd POWER SUPPLY MEANS FOR A MAGNETRON
FR2324116A1 (en) * 1975-09-12 1977-04-08 Matsushita Electric Ind Co Ltd POWER SOURCE FOR MAGNETRON
DE2728616A1 (en) * 1976-07-23 1978-01-26 Hitachi Ltd POWER SUPPLY ARRANGEMENT
US4302651A (en) * 1977-11-30 1981-11-24 Varo Semiconductor, Inc. High-voltage SCR circuit for microwave oven and the like
US4281372A (en) * 1979-10-22 1981-07-28 General Electric Company Power supply for magnetron and the like loads

Also Published As

Publication number Publication date
JPS6332832A (en) 1988-02-12
EP0248669A2 (en) 1987-12-09
GB8613567D0 (en) 1986-07-09

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Inventor name: GURWICZ, DAVID