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EP0269413A3 - Induction heating circuits for cooking appliances - Google Patents

Induction heating circuits for cooking appliances Download PDF

Info

Publication number
EP0269413A3
EP0269413A3 EP87310357A EP87310357A EP0269413A3 EP 0269413 A3 EP0269413 A3 EP 0269413A3 EP 87310357 A EP87310357 A EP 87310357A EP 87310357 A EP87310357 A EP 87310357A EP 0269413 A3 EP0269413 A3 EP 0269413A3
Authority
EP
European Patent Office
Prior art keywords
induction heating
circuit
thyristor
capacitor
turn
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Withdrawn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
EP87310357A
Other languages
German (de)
French (fr)
Other versions
EP0269413A2 (en
Inventor
Robert Ian Bullough
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.)
Creda Ltd
Original Assignee
Creda Ltd
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 Creda Ltd filed Critical Creda Ltd
Publication of EP0269413A2 publication Critical patent/EP0269413A2/en
Publication of EP0269413A3 publication Critical patent/EP0269413A3/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Withdrawn legal-status Critical Current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
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

In an induction heating circuit for a cooking appliance, a pan heating coil (L2) is powered at values determined by the state of conduction of a gate turn-off thyristor (VT1). To reduce the amplitude of current flow through the thyristor at turn-on, a circuit responsive to the voltage across a capacitor (CR) that resonates the pan coil (L2) is employed. The circuit is coupled to the resonant circuit comprising pan coil (L2) and capacitor (CR) by a saturating transformer (T1) and senses the instant when the voltage across capacitor (CR) reaches a minimum and this information is used to turn-on the thyristor (VT1).
EP87310357A 1986-11-25 1987-11-24 Induction heating circuits for cooking appliances Withdrawn EP0269413A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8628098A GB2199453B (en) 1986-11-25 1986-11-25 Improvements in or relating to induction heating circuits for cooking appliances
GB8628098 1986-11-25

Publications (2)

Publication Number Publication Date
EP0269413A2 EP0269413A2 (en) 1988-06-01
EP0269413A3 true EP0269413A3 (en) 1989-01-11

Family

ID=10607863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87310357A Withdrawn EP0269413A3 (en) 1986-11-25 1987-11-24 Induction heating circuits for cooking appliances

Country Status (2)

Country Link
EP (1) EP0269413A3 (en)
GB (1) GB2199453B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5358932A (en) * 1989-12-29 1994-10-25 Zymogenetics, Inc. Hybrid protein C
RU2453977C2 (en) * 2009-07-24 2012-06-20 Общество с ограниченной ответственностью "Силовая электроника" Control method for stand-alone inverter with resonance switching

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147910A (en) * 1976-06-04 1979-04-03 Matsushita Electric Industrial Co., Ltd. Power adjustment with variable frequency and duty-cycle control for induction heating apparatus
US4210792A (en) * 1976-07-27 1980-07-01 Tokyo Shibaura Electric Co., Ltd. Induction heating apparatus with load detecting and control circuit
US4338503A (en) * 1979-08-03 1982-07-06 Tokyo Shibaura Denki Kabushiki Kaisha Inductive heating apparatus
DE3445538A1 (en) * 1983-12-14 1985-06-27 Sanyo Electric Co., Ltd., Moriguchi, Osaka Induction heating apparatus
DE3447865A1 (en) * 1984-07-26 1986-02-06 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa INDUCTION HEATER
GB2181030A (en) * 1985-09-20 1987-04-08 Sony Corp High-frequency induction heating systems and methods of protecting circuits thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1529114A (en) * 1977-03-31 1978-10-18 Diamond Controls Ltd H Power supply circuits

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147910A (en) * 1976-06-04 1979-04-03 Matsushita Electric Industrial Co., Ltd. Power adjustment with variable frequency and duty-cycle control for induction heating apparatus
US4210792A (en) * 1976-07-27 1980-07-01 Tokyo Shibaura Electric Co., Ltd. Induction heating apparatus with load detecting and control circuit
US4338503A (en) * 1979-08-03 1982-07-06 Tokyo Shibaura Denki Kabushiki Kaisha Inductive heating apparatus
DE3445538A1 (en) * 1983-12-14 1985-06-27 Sanyo Electric Co., Ltd., Moriguchi, Osaka Induction heating apparatus
DE3447865A1 (en) * 1984-07-26 1986-02-06 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa INDUCTION HEATER
GB2181030A (en) * 1985-09-20 1987-04-08 Sony Corp High-frequency induction heating systems and methods of protecting circuits thereof

Also Published As

Publication number Publication date
GB8628098D0 (en) 1986-12-31
GB2199453A (en) 1988-07-06
EP0269413A2 (en) 1988-06-01
GB2199453B (en) 1990-11-14

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): BE DE ES FR GB IT NL

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Ipc: H05B 6/12

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17P Request for examination filed

Effective date: 19890527

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CREDA LIMITED

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CREDA LIMITED

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Effective date: 19900605

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920428

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BULLOUGH, ROBERT IAN