EP1734789B1 - Verfahren und Anordnung zur Leistungsvorsorge einer Induktionsheizeinrichtung - Google Patents

Verfahren und Anordnung zur Leistungsvorsorge einer Induktionsheizeinrichtung Download PDF

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Publication number
EP1734789B1
EP1734789B1 EP06011351A EP06011351A EP1734789B1 EP 1734789 B1 EP1734789 B1 EP 1734789B1 EP 06011351 A EP06011351 A EP 06011351A EP 06011351 A EP06011351 A EP 06011351A EP 1734789 B1 EP1734789 B1 EP 1734789B1
Authority
EP
European Patent Office
Prior art keywords
frequency
supply voltage
working frequency
switching means
course
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.)
Not-in-force
Application number
EP06011351A
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German (de)
English (en)
French (fr)
Other versions
EP1734789A1 (de
Inventor
Jörg Bögel
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP1734789A1 publication Critical patent/EP1734789A1/de
Application granted granted Critical
Publication of EP1734789B1 publication Critical patent/EP1734789B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a method for supplying an induction heater with power and an arrangement for supplying power to an induction heater.
  • Such induction heating devices are widely used, for example, as induction coils in induction cooking fields. There is a desire for ever higher performance, in particular cooking operations of larger amounts of liquid, such as pasta water to be able to perform quickly.
  • the frequency converters necessary for the power supply exceed by standards specified limits with regard to the harmonics and system perturbations.
  • the cause of the strong effects of the harmonics or in particular the third harmonic is essentially that the permeability of the magnetic Components in the frequency converter with the amplitude of the inductor current flowing through the induction coil changes.
  • the permeability of ferrites or the like which are used in an induction coil for field guidance, and those of the pot material decreases. This in turn changes the inductance of the induction coil in the course of a half-wave of the supply voltage and, consequently, also the resonant frequency of a series resonant circuit, as used in the power supply.
  • the current consumption is ultimately distorted from the network or differs in its course from the predetermined course of the supply voltage.
  • the invention has for its object to provide an aforementioned method and an arrangement can be avoided with the problems of the prior art and in particular higher power can be generated in induction heaters or network interferences or distortions of power consumption can be reduced from the supply network.
  • an operating frequency of the switching means or of the entire frequency converter is slightly increased in the course of a half-wave of the supply voltage or operating voltage of the induction coil and then lowered again. This is done by basically establishing a frequency base value of the operating frequency. Based on this, the working frequency is first increased slightly in the course of the half-wave and then lowered again. This is done in such a way that at least at the zero crossings of the supply voltage the operating frequency is present with the basic frequency value and is increased therebetween.
  • the frequency converter or the power supply can have a series resonant circuit.
  • This consists of an induction coil, which represents the power transmission for the induction heater, resonant circuit capacitors and a half-bridge with the switchable switching means.
  • a series resonant circuit for induction heating is known.
  • the operating frequency then reaches a maximum when the supply voltage or operating voltage in turn reaches a maximum.
  • the course of the operating frequency during a half-wave of the supply voltage to that of the supply voltage itself basically similar.
  • the operating frequency can be changed as continuously and continuously as possible. This is possible by a corresponding control of the frequency converter or the switching means.
  • the course of the working frequency in a rising section is equal to that in a descending section.
  • the course of the working frequency during a half-wave is approximately mirror-symmetrical.
  • the point of mirror symmetry lies at the maximum or half the duration of the half-wave.
  • Such an aforementioned operating frequency is for example in the range of a few kHz, preferably 10kHz to 60kHz, more preferably about 20kHz.
  • An application according to the invention with which, for example, an aforementioned method can be carried out has a frequency converter which contains a previously described series resonant circuit.
  • a drive device is provided for the switching means. This is designed to change the operating frequency of the switching means or the frequency converter so that in the course of a half-wave of the supply voltage or operating voltage, the operating frequency of a frequency base value first increases up to a maximum and then drops back to the frequency base value , This has already been explained above.
  • FIG. 2 shows an arrangement or circuit arrangement 11 according to the invention.
  • a controller 13 controls a frequency converter 15 with two switching means T 1 and T 2 , for example, transistors. These form together with a DC link capacitor C Zw and resonant circuit capacitors C s, the control for the induction coil L. On the controller 13, especially the operating frequency for the switching means T 1 and T 2 and thus the frequency converter 15 is specified.
  • This course of the operating frequency f and the other variables according to FIG. 1 is shown by way of example in FIG. Starting from a basic frequency f G of approximately 20 kHz here, the operating frequency f increases in a manner similar to the profile of the operating voltage U across a half-wave and then returns to the basic frequency value f G. This results in the course shown for the inductor current I as well as a substantially constant impedance Z of the induction coil L. This course of the inductor current I in turn is now the sine wave of the operating voltage U b adapted again. Thus, as has been explained in detail before, disturbing network perturbations can be reliably avoided.
  • the induction coil L is used in an induction heating device or a heating device for an induction hob, then even more than 3 kW or 3.2 kW are possible, for example 3.5 kW to 3.7 or even 4 kW. Thus, stronger induction hobs can be built for faster parboiling or higher power transmission.
  • the effort for the control of the operating frequency f of the frequency converter 15 and the switching means T 1 and T 2 is not particularly serious. In particular, if the course of the operating frequency f is predetermined or controlled by a control process, the effort is kept within limits since it is possible to work with previously known progressions.
  • the inductor current I can be detected and the operating frequency f are controlled so that the inductor current I exactly has an exact sinusoidal shape or another predetermined shape.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Inverter Devices (AREA)
EP06011351A 2005-06-14 2006-06-01 Verfahren und Anordnung zur Leistungsvorsorge einer Induktionsheizeinrichtung Not-in-force EP1734789B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005028829A DE102005028829A1 (de) 2005-06-14 2005-06-14 Verfahren und Anordnung zur Leistungsversorgung einer Induktionsheizeinrichtung

Publications (2)

Publication Number Publication Date
EP1734789A1 EP1734789A1 (de) 2006-12-20
EP1734789B1 true EP1734789B1 (de) 2008-01-16

Family

ID=37057223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011351A Not-in-force EP1734789B1 (de) 2005-06-14 2006-06-01 Verfahren und Anordnung zur Leistungsvorsorge einer Induktionsheizeinrichtung

Country Status (6)

Country Link
EP (1) EP1734789B1 (ja)
JP (1) JP2006353085A (ja)
CN (1) CN1882201B (ja)
AT (1) ATE384414T1 (ja)
DE (2) DE102005028829A1 (ja)
ES (1) ES2300080T3 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112862A1 (en) 2008-04-25 2009-10-28 Electrolux Home Products Corporation N.V. Method and arrangement for dynamic wave form correction

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041964A1 (de) 2006-08-25 2008-04-03 E.G.O. Elektro-Gerätebau GmbH Verfahren und Anordnung zur Leistungsversorgung einer Induktionsheizeinrichtung
EP2224787B1 (en) 2009-02-26 2019-01-23 Electrolux Home Products Corporation N.V. A method and device for controlling an induction heating cooking apparatus
ES2586575T3 (es) * 2011-05-19 2016-10-17 Whirlpool Corporation Procedimiento para incrementar el rango de regulación de los convertidores cuasi resonantes (QR) CA-CA
JP5894682B2 (ja) 2011-12-29 2016-03-30 アルチュリク・アノニム・シルケチ 誘導加熱調理器上で動作される無線台所器具
US10182472B2 (en) 2011-12-29 2019-01-15 Arcelik Anonim Sirketi Wireless kitchen appliance operated on induction heating cooker
CN105338674B (zh) * 2014-07-02 2019-04-30 浙江苏泊尔家电制造有限公司 一种电磁加热方法及采用该方法的电磁加热的电饭煲
EP3151632B1 (en) 2015-10-02 2018-06-13 Electrolux Appliances Aktiebolag Induction heating method and system
EP3151631B1 (en) 2015-10-02 2018-06-13 Electrolux Appliances Aktiebolag Induction heating method and system
CN106686785A (zh) * 2015-11-11 2017-05-17 佛山市顺德区美的电热电器制造有限公司 电磁加热装置及其控制方法
EP3177107B1 (de) * 2015-12-02 2024-01-24 E.G.O. Elektro-Gerätebau GmbH Verfahren zum betrieb eines induktionskochfelds
ES2673132B1 (es) * 2016-12-19 2019-03-28 Bsh Electrodomesticos Espana Sa Dispositivo de aparato de cocción por inducción.
EP3386270B1 (en) 2017-04-04 2019-11-27 Electrolux Appliances Aktiebolag Induction heating method and system
EP3967108A1 (de) * 2019-05-10 2022-03-16 BSH Hausgeräte GmbH Gargerätevorrichtung
DE102022202805A1 (de) 2022-03-22 2023-09-28 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Induktionskochfelds und Induktionskochfeld

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1053761A (en) * 1974-12-13 1979-05-01 White-Westinghouse Corporation Induction cooking apparatus
CN2471015Y (zh) * 2000-12-14 2002-01-09 上海思源电气有限公司 变频谐振电源
US6727482B2 (en) * 2001-01-12 2004-04-27 Nicholas Bassill Apparatus and method for inductive heating
JP4752159B2 (ja) * 2001-09-05 2011-08-17 パナソニック株式会社 高周波電源装置
JP3831298B2 (ja) * 2002-06-05 2006-10-11 株式会社日立製作所 電磁誘導加熱装置
JP4045138B2 (ja) * 2002-07-19 2008-02-13 日立アプライアンス株式会社 誘導加熱調理器
US6870144B2 (en) * 2002-12-24 2005-03-22 Lg Electronics Inc. Inverter circuit of induction heating rice cooker
JP4163662B2 (ja) * 2004-06-30 2008-10-08 日立アプライアンス株式会社 電磁誘導加熱装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112862A1 (en) 2008-04-25 2009-10-28 Electrolux Home Products Corporation N.V. Method and arrangement for dynamic wave form correction

Also Published As

Publication number Publication date
ATE384414T1 (de) 2008-02-15
CN1882201B (zh) 2011-07-27
EP1734789A1 (de) 2006-12-20
ES2300080T3 (es) 2008-06-01
CN1882201A (zh) 2006-12-20
JP2006353085A (ja) 2006-12-28
DE502006000298D1 (de) 2008-03-06
DE102005028829A1 (de) 2007-01-11

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