GB1421578A - Induction heat cooking apparatus - Google Patents

Induction heat cooking apparatus

Info

Publication number
GB1421578A
GB1421578A GB1433473A GB1433473A GB1421578A GB 1421578 A GB1421578 A GB 1421578A GB 1433473 A GB1433473 A GB 1433473A GB 1433473 A GB1433473 A GB 1433473A GB 1421578 A GB1421578 A GB 1421578A
Authority
GB
United Kingdom
Prior art keywords
coil
circuit
current
oscillator
load
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.)
Expired
Application number
GB1433473A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1421578A publication Critical patent/GB1421578A/en
Expired 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
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Inverter Devices (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)

Abstract

1421578 Automatic control of induction heating WESTINGHOUSE ELECTRIC CORP 26 March 1973 [13 April 1972] 14334/73 Heading G3R Cooking apparatus includes an induction heating coil forming part of a series resonant circuit in an oscillator. D.C. supply lines are switched across the coil circuit at the resonant frequency by current derived from the current in the coil, and the load current is regulated by automatically adjusting the D.C. supply voltage. As shown, a pancake induction coil 10 is supplied from an A.C. source 112 over a controllable rectifier arrangement 18 and an oscillator 16. Firing signals for the controlled rectifiers 124, 126 are produced by a circuit 30 in response to variations in load current and the Q-factor of the load circuit. Transistors 34, 40 in the oscillator are switched by a current transformer 52 in synchronism with current in the coil 10 and series capacitors 20, 22 to connect the coil in alternate polarity across D.C. lines 36, 42. A starter circuit 64 for the oscillator includes a breakdown device 70 such as a diac or Shockley diode. To ensure at least a minimum load on the oscillator, a dummy load resistor 81 is provided, and the current through either this resistor or through the coil 10 is sensed by a transformer 84 to provide a signal for comparison with a reference voltage determined by a potentiometer 170 and Zener diodes 156, 158 in control circuit 30. A programmable uni-junction transistor 210 is included in a ramp and pedestal circuit 153 forming the output stage of control circuit 30.
GB1433473A 1972-04-13 1973-03-26 Induction heat cooking apparatus Expired GB1421578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00243715A US3806688A (en) 1972-04-13 1972-04-13 Induction heat cooking apparatus

Publications (1)

Publication Number Publication Date
GB1421578A true GB1421578A (en) 1976-01-21

Family

ID=22919831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1433473A Expired GB1421578A (en) 1972-04-13 1973-03-26 Induction heat cooking apparatus

Country Status (8)

Country Link
US (1) US3806688A (en)
JP (1) JPS499742A (en)
CA (1) CA963540A (en)
DE (1) DE2317565A1 (en)
ES (1) ES413621A1 (en)
FR (1) FR2180092A1 (en)
GB (1) GB1421578A (en)
IT (1) IT983807B (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1446737A (en) * 1972-11-15 1976-08-18 Matsushita Electric Ind Co Ltd Induction cooking appliances
SE408518B (en) * 1974-05-17 1979-06-11 Matsushita Electric Ind Co Ltd INDUCTION HEATING DEVICE
US4051426A (en) * 1974-05-31 1977-09-27 White-Westinghouse Corporation Shoot through protected current driven transistor inverter circuit
US3925633A (en) * 1974-09-06 1975-12-09 Donald F Partridge Circuit for controlling power flow from a high frequency energy source to a plurality of high frequency loads
US4010342A (en) * 1974-10-29 1977-03-01 Roper Corporation Induction cooking appliance having improved protection circuits
JPS5169240A (en) * 1974-12-11 1976-06-15 Shinko Electric Co Ltd INBAATASHIKYUDOKANETSUSOCHINO HIKANETSUBUTSUKENCHIHOHO
CA1053761A (en) * 1974-12-13 1979-05-01 White-Westinghouse Corporation Induction cooking apparatus
US4013859A (en) * 1975-06-04 1977-03-22 Environment/One Corporation Induction cooking unit having cooking load sensing device and essentially zero stand-by power loss
DE2651516C2 (en) * 1976-11-11 1986-03-06 Sachs Systemtechnik Gmbh, 8720 Schweinfurt Circuit for generating an open magnetic field
US4169222A (en) * 1977-07-26 1979-09-25 Rangaire Corporation Induction cook-top system and control
JPS58831B2 (en) * 1978-09-27 1983-01-08 東洋製罐株式会社 High frequency induction heating circuit
US4308443A (en) * 1979-05-01 1981-12-29 Rangaire Corporation Induction cook-top with improved touch control
US4453068A (en) * 1979-05-01 1984-06-05 Rangaire Corporation Induction cook-top system and control
JPS5693286A (en) * 1979-12-27 1981-07-28 Tokyo Shibaura Electric Co Induction heating cooking device
GB2108786B (en) * 1981-11-05 1985-12-11 Sanyo Electric Co Induction heating apparatus
JPS5882796U (en) * 1981-11-30 1983-06-04 シャープ株式会社 Electromagnetic cooker
AU543894B2 (en) * 1982-09-13 1985-05-09 Tokyo Shibaura Denki Kabushiki Kaisha Electromagnetic induction heating apparatus
FR2607994B1 (en) * 1986-12-05 1993-11-26 Electricite De France REGULATION SYSTEM OF AN INVERTER GENERATOR WITH SWITCHES SUPPLYING AN INDUCTION LOAD
US5434144A (en) * 1994-03-04 1995-07-18 The Procter & Gamble Company Methods of using cyclic polyanionic polyol derivatives for regulating skin wrinkles
DE19654269C2 (en) * 1995-12-27 2000-02-17 Lg Electronics Inc Induction cooker
US5968398A (en) * 1997-05-16 1999-10-19 The Lepel Corporation Apparatus and method for non-contact detection and inductive heating of heat retentive food server warming plates
US5908574A (en) * 1998-04-17 1999-06-01 Garland Commercial Industries, Inc. Induction radiant broiler
US6384387B1 (en) * 2000-02-15 2002-05-07 Vesture Corporation Apparatus and method for heated food delivery
AR030511A1 (en) * 2000-12-22 2003-08-20 Patricio Lagos Lehuede AN INVESTOR OR CONVERTER BY CURRENT INJECTION PROVIDED WITH A CIRCUIT WHOSE FREQUENCY OF GENERATION OF THE ALTERNATE VOLTAGE IS ADJUSTED BY THE FREQUENCY OF RESONANCE OF THE LOAD, CYCLE TO CYCLE, WITHOUT DELAYS
CA2358602A1 (en) * 2001-10-09 2003-04-09 Norax Canada Inc. Resonance controlled conductive heating
US6953919B2 (en) 2003-01-30 2005-10-11 Thermal Solutions, Inc. RFID-controlled smart range and method of cooking and heating
US7573005B2 (en) * 2004-04-22 2009-08-11 Thermal Solutions, Inc. Boil detection method and computer program
ES2382862B1 (en) * 2009-10-26 2013-05-08 BSH Electrodomésticos España S.A. COOKING HOB WITH AT LEAST TWO HEATING ELEMENTS AND A POWER ELECTRONICS PROVISION
US20150114954A1 (en) * 2013-10-29 2015-04-30 Sarge Holdings Co., Llc Portable induction heater

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB954372A (en) * 1959-08-04 1964-04-08 Licentia Gmbh A decimal-binary converter
NL296248A (en) * 1962-08-09
US3436644A (en) * 1966-07-29 1969-04-01 Trw Inc High frequency modulated static inverter
US3448367A (en) * 1966-09-19 1969-06-03 Gen Electric Inverter inhibit circuits
US3432774A (en) * 1967-08-08 1969-03-11 Atomic Energy Commission Voltage-tuned wien bridge oscillator
GB1246860A (en) * 1968-02-10 1971-09-22 Wandel & Goltermann Direct current converter
US3566243A (en) * 1968-09-30 1971-02-23 Pillar Corp High frequency power supply
US3584282A (en) * 1969-04-01 1971-06-08 Westinghouse Electric Corp Current limiting system for motor control
US3596165A (en) * 1969-07-24 1971-07-27 Tektronix Inc Converter circuit having a controlled output
US3684853A (en) * 1971-10-18 1972-08-15 Gen Electric Induction surface heating unit system

Also Published As

Publication number Publication date
FR2180092A1 (en) 1973-11-23
IT983807B (en) 1974-11-11
JPS499742A (en) 1974-01-28
AU5375373A (en) 1974-09-26
ES413621A1 (en) 1975-12-16
US3806688A (en) 1974-04-23
DE2317565A1 (en) 1973-10-31
CA963540A (en) 1975-02-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees