EP1878309A1 - Method and arrangement for supplying power to several induction coils in an induction apparatus - Google Patents
Method and arrangement for supplying power to several induction coils in an induction apparatusInfo
- Publication number
- EP1878309A1 EP1878309A1 EP06742762A EP06742762A EP1878309A1 EP 1878309 A1 EP1878309 A1 EP 1878309A1 EP 06742762 A EP06742762 A EP 06742762A EP 06742762 A EP06742762 A EP 06742762A EP 1878309 A1 EP1878309 A1 EP 1878309A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- induction
- frequency
- power
- coils
- frequency difference
- 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.)
- Granted
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
- H05B6/36—Coil arrangements
- H05B6/44—Coil arrangements having more than one coil or coil segment
-
- 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
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
-
- 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
Definitions
- the invention relates to a method for supplying power to a plurality of induction coils in an induction device and to an arrangement for carrying out this method.
- ferrites for magnetic field guidance are provided under induction coils. These ferrites are subject to magnetostriction, ie a change in length, depending on the operating frequency of the induction coil. This is at least partially true for used cookware.
- the working frequency of induction coils is usually above the audible range, the noise can be heard through intermodulation with another powered induction coil.
- audible mixing products can arise from the frequency difference of the operating frequencies and their harmonic harmonics.
- Further intermodulation can occur if two frequency converters for the induction coils are connected to a common supply voltage. sen are. In this case, one frequency converter modulates the supply voltage for the other frequency converter.
- the invention has for its object to provide an aforementioned method and an arrangement with which the problems of the prior art can be avoided and in particular an advantageous operation of multiple induction coils is possible with the lowest possible noise.
- Each induction coil is powered by its own frequency converter or drive unit.
- the operating frequencies or the frequencies of the respective frequency converter for the individual induction coils depending on a planned performance or by an operator by means of input for the performance required values with respect to a difference between the frequencies, ie a frequency difference, after the operation of multiple induction coils one of the following possible modes of operation:
- the frequency difference is almost zero, advantageously it is zero.
- the frequency difference is less than 1 kHz, so it is advantageous, but relatively low.
- the frequency difference is between 15 kHz and 25 kHz or is no longer in the audible range. In the first operating mode a) there can be no frequency differences. Thus, no disturbing intermodulation or no audible effects can arise.
- the frequencies are very close in operation.
- the frequency difference is even 500 Hz and less.
- the frequency difference is in a very high range for the human ear or is no longer in the audible range.
- the method operates exactly two induction coils, as described in the present application.
- each induction cooker may have a single induction coil.
- an induction cooking station may have an induction coil which consists of several partial coils and / or which can be driven by a plurality of power generators or frequency converters. This then corresponds to so-called multi-circuit heaters, as they are known from radiant heaters.
- Induction coils in particular for household use, such as an induction oven or an induction hob, are advantageously operated in a frequency range of about 16 kHz to 100 kHz.
- An advantageous procedure involving the operating mode c) can provide that the induction coils at the respective start of operation, that is, when several coils are to be operated, with the required values, which have been entered by an operator for each induction coil via an operating device, first with high frequency or the highest operating frequency of the system can be operated.
- the function as a cup detection coil is particularly advantageous. This makes it possible to detect whether an appropriate cooking vessel is to be heated via an induction coil. Subsequently, or in the event that at least two induction coils are actually to be operated, the frequencies are lowered with the frequency converters. This takes place until the total power of the induction coils corresponds to the total power of the required values for the individual powers.
- an induction coil is operated with more power than required and the other with less power. Otherwise, after one of the operating modes a) or b) could be moved.
- the sum of the powers at common frequency f g corresponds to the sum of the powers at different frequencies. she is at the same time the required total power for both induction coils.
- Another possibility may be to first try to satisfy the conditions with a first lower frequency difference, for example the said 18 kHz. If this is not the case, or if the intended algorithm does not work for the adjustment, then it can be attempted with a second somewhat higher frequency difference of about 24 kHz.
- a first lower frequency difference for example the said 18 kHz.
- Fig. 1 is a circuit diagram of an arrangement of two induction coils in an induction hob, each with a frequency converter
- Fig. 2 is a graph of the operating frequency f over time t
- Fig. 3 is a graph of the power P over time t.
- FIG. 1 an induction hob 11 is shown in section.
- an operating device 15 is arranged with two rotary knobs 16 and 17 for the power setting.
- the representation of the operating device 15 is to be understood very schematically and of course all other controls can be provided, in particular also so-called touch switch.
- the operating device 15 is connected to a controller 18 and, among other things, passes on the control commands by adjusting the rotary knobs 16 and 17 to the controller 18.
- the controller 18 in turn is connected to a first inverter 19, the supplied with a frequency fi, a first inductor L1 supplied, and with a second frequency converter 20, which with the frequency f 2, a second inductor L2.
- the induction coils L1 and L2 are arranged in a known manner below the hob plate 13. On its underside, ferrites 21 are arranged in a likewise known manner for influencing the magnetic field generated by the induction coils L. Above the induction coils L1 and L2 are on the hob plate 13 cookware re 22 and 23 put on. The larger cookware 23 illustrates to what extent the coupling of a higher power should or should be done here. This can also be seen in the position of the rotary knob 17, which is further adjusted to the right and thus to a higher power level than the left rotary knob 16.
- the rotary knob 16 is used to adjust the power for the induction cooker formed by the left induction coil L1 and the right rotary knob 17 for the induction cooker formed by the right induction coil L2.
- FIGS. 2 and 3 as described together below, it is shown how the inductors L1 and L2 are supplied with power P at a certain frequency of the supply voltage.
- the curves for the frequency and the power are shown in dashed lines for the coil L2.
- both induction coils L1 and L2 are operated with common frequency, namely with f ma ⁇ in the sense of a pan detection function. This is sufficiently known to the person skilled in the art and need not be explained in more detail here.
- suitable cookware namely the cookware 22 and 23, are set up and thus an operation is possible. Accordingly, power is released by the controller 18 and the frequency converters 19 and 20.
- the frequency set by the frequency converters 19 and 20 is lowered by an equal value to the value f g .
- This value f g results from the specifications that both inductors L1 and L2 are to be operated with the same frequency, namely f g , and with the powers Pi (f g ) and P2 (f g ).
- the powers Pi (f g ) and P ⁇ Cfg) result from the specification with f g and the value set and predetermined via the rotary knobs 16 and 17 for the total power generated. It can be seen to what extent in the first operation with the common frequency f g, the induction coil L1 with the power P- ⁇ (f g ) is operated, which is greater than the average intended power P 1 .
- the induction coil L2 is operated with a power P2 (f g ), which is below the average intended power P 2 . Then, the induction coil L1 operated at excessive power is increased in its operating frequency fi by a frequency difference ⁇ f, which in the present case is 18 kHz. Depending on this, both operating frequencies are lowered with the fixed frequency interval ⁇ f. To the same extent then increase the performance of the inductors L1 and L2 again. The reduction takes place until the frequencies f v i and f V 2 are reached with the powers Pi (f v ) and P2 (f v ). The sum of Pi (f v ) and P2 (f v ) corresponds to the sum of P- ⁇ (fg) and P2 (fg).
- the above-mentioned frequency difference of 18 kHz during the operating mode c) is present, which means a barely audible noise.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06742762T PL1878309T3 (en) | 2005-05-04 | 2006-05-02 | Method and arrangement for supplying power to several induction coils in an induction apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005021888A DE102005021888A1 (en) | 2005-05-04 | 2005-05-04 | Method and arrangement for power supply of a plurality of induction coils in an induction device |
PCT/EP2006/004081 WO2006117182A1 (en) | 2005-05-04 | 2006-05-02 | Method and arrangement for supplying power to several induction coils in an induction apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1878309A1 true EP1878309A1 (en) | 2008-01-16 |
EP1878309B1 EP1878309B1 (en) | 2012-07-25 |
Family
ID=36675889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06742762A Revoked EP1878309B1 (en) | 2005-05-04 | 2006-05-02 | Method and arrangement for supplying power to several induction coils in an induction apparatus |
Country Status (9)
Country | Link |
---|---|
US (1) | US7910865B2 (en) |
EP (1) | EP1878309B1 (en) |
JP (1) | JP5027115B2 (en) |
KR (1) | KR101260086B1 (en) |
CN (1) | CN101208994B (en) |
DE (1) | DE102005021888A1 (en) |
ES (1) | ES2389935T3 (en) |
PL (1) | PL1878309T3 (en) |
WO (1) | WO2006117182A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2392223A1 (en) * | 2010-12-27 | 2012-12-05 | BSH Electrodomésticos España S.A. | Cooking device |
EP4044767A4 (en) * | 2019-10-07 | 2023-11-08 | LG Electronics Inc. | Induction heating device and method for controlling induction heating device |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2338057T5 (en) * | 2007-01-23 | 2023-03-09 | Whirlpool Co | Control method for an induction cooker and induction cooker adapted to carry out said method |
DE102008042512A1 (en) * | 2008-09-30 | 2010-04-01 | BSH Bosch und Siemens Hausgeräte GmbH | Hob and method for operating a hob |
EP2194756B1 (en) * | 2008-12-02 | 2016-07-27 | Whirlpool Corporation | A method for controlling the induction heating system of a cooking appliance |
ATE520280T1 (en) * | 2008-12-22 | 2011-08-15 | Fagorbrandt Sas | METHOD FOR SUPPLYING POWER WITH THE POWER OF AT LEAST ONE INDUCTOR AND COOKING APPARATUS IN WHICH THIS METHOD IS IMPLEMENTED |
PL2200398T3 (en) * | 2008-12-22 | 2012-01-31 | Fagorbrandt Sas | Method for supplying power to two induction units and cooking device implementing said method |
TWI394547B (en) * | 2009-03-18 | 2013-05-01 | Delta Electronics Inc | Heating apparatus |
CN101848566B (en) * | 2009-03-23 | 2013-02-20 | 台达电子工业股份有限公司 | Heating device |
EP3771288B1 (en) | 2009-10-05 | 2021-12-15 | Whirlpool Corporation | Method for supplying power to induction cooking zones of an induction cooking hob having a plurality of power converters, and induction cooking hob using such method |
EP2328384B1 (en) * | 2009-11-27 | 2017-03-15 | Electrolux Home Products Corporation N.V. | An induction hob and a method for controlling an induction hob |
ES2390688B1 (en) | 2010-03-23 | 2013-10-22 | BSH Electrodomésticos España S.A. | Cooking countertop device, cooking hob and control procedure of said cooking hob |
JP5495960B2 (en) * | 2010-06-07 | 2014-05-21 | 三菱電機株式会社 | Induction heating cooker |
JP5605077B2 (en) * | 2010-08-19 | 2014-10-15 | パナソニック株式会社 | Induction heating cooker |
EP2506666B1 (en) * | 2011-03-28 | 2020-05-06 | BSH Hausgeräte GmbH | Cooking device |
EP2506665B1 (en) | 2011-03-28 | 2017-05-24 | BSH Hausgeräte GmbH | Cooking device |
EP2506664B1 (en) * | 2011-03-28 | 2016-02-24 | BSH Hausgeräte GmbH | Cooking device |
ES2632582T3 (en) * | 2011-03-28 | 2017-09-14 | BSH Hausgeräte GmbH | Cooking appliance |
US9198233B2 (en) | 2011-06-09 | 2015-11-24 | General Electric Company | Audible noise manipulation for induction cooktop |
CN103574707B (en) * | 2012-08-07 | 2016-05-04 | 美的集团股份有限公司 | For Poewr control method and the bull electromagnetic stove of bull electromagnetic stove |
ITTO20120896A1 (en) | 2012-10-15 | 2014-04-16 | Indesit Co Spa | INDUCTION HOB |
US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
EP2731402B1 (en) | 2012-11-09 | 2015-08-19 | Electrolux Home Products Corporation N.V. | A method for controlling an induction cooking hob with a plurality of induction coils and an induction cooking hob |
FR3000361B1 (en) * | 2012-12-20 | 2014-12-26 | Fagorbrandt Sas | METHOD AND DEVICE FOR POWER SUPPLYING INDUCTION MEANS |
EP2836053B1 (en) * | 2013-08-05 | 2017-09-13 | Electrolux Appliances Aktiebolag | Induction hob and method for operating an induction hob |
EP2846607B1 (en) | 2013-09-05 | 2016-05-18 | Electrolux Appliances Aktiebolag | An induction cooking hob including a cooking area with three or more induction coils and a method for controlling a cooking area |
EP2911472B2 (en) | 2013-12-20 | 2022-11-09 | BSH Hausgeräte GmbH | Cooking appliance, in particular cooking hob device, with a plurality of inverters |
ES2564888B1 (en) * | 2014-09-24 | 2017-01-05 | BSH Electrodomésticos España S.A. | Cooking appliance device and procedure for putting into operation a cooking appliance device |
CN106247416B (en) * | 2016-08-10 | 2018-10-23 | 深圳拓邦股份有限公司 | More kitchen range electromagnetic ovens and its Poewr control method |
CN107087319B (en) * | 2017-05-15 | 2020-11-17 | 深圳拓邦股份有限公司 | Control method and device for multi-burner induction cooker |
EP3432682A1 (en) | 2017-07-18 | 2019-01-23 | Whirlpool Corporation | Method for operating an induction cooking hob and cooking hob using such method |
US10993292B2 (en) | 2017-10-23 | 2021-04-27 | Whirlpool Corporation | System and method for tuning an induction circuit |
US11140751B2 (en) | 2018-04-23 | 2021-10-05 | Whirlpool Corporation | System and method for controlling quasi-resonant induction heating devices |
CN109140543B (en) * | 2018-06-08 | 2020-03-31 | 浙江绍兴苏泊尔生活电器有限公司 | Noise reduction method for electromagnetic heating cooker |
US20210321494A1 (en) * | 2018-08-30 | 2021-10-14 | Lg Electronics Inc. | Induction heating device and method of controlling the same |
ES2754787A1 (en) | 2018-10-17 | 2020-04-20 | Bsh Electrodomesticos Espana Sa | Cooking Appliance Device (Machine-translation by Google Translate, not legally binding) |
ES2754793A1 (en) | 2018-10-17 | 2020-04-20 | Bsh Electrodomesticos Espana Sa | Cooking Appliance Device (Machine-translation by Google Translate, not legally binding) |
ES2754813A1 (en) | 2018-10-17 | 2020-04-20 | Bsh Electrodomesticos Espana Sa | Cooking Appliance Device (Machine-translation by Google Translate, not legally binding) |
KR102620662B1 (en) * | 2018-10-18 | 2024-01-04 | 삼성전자주식회사 | Cooking apparatus and method for controlling thereof |
ES2764740A1 (en) | 2018-12-04 | 2020-06-04 | Bsh Electrodomesticos Espana Sa | Cooking appliance device (Machine-translation by Google Translate, not legally binding) |
ES2764900A1 (en) * | 2018-12-04 | 2020-06-04 | Bsh Electrodomesticos Espana Sa | Cooking appliance device (Machine-translation by Google Translate, not legally binding) |
CN111692616B (en) * | 2019-03-12 | 2022-05-27 | 泰科电子(上海)有限公司 | Multi-cooking-range electromagnetic oven |
EP3967108A1 (en) * | 2019-05-10 | 2022-03-16 | BSH Hausgeräte GmbH | Cooking appliance |
WO2020263905A1 (en) * | 2019-06-24 | 2020-12-30 | Dhf America, Llc. | System and method of decomposing a fluidic product having particles |
CN114698172B (en) * | 2020-12-29 | 2023-01-24 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
CN114698171B (en) * | 2020-12-29 | 2023-01-24 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment and power control method and power control device thereof |
CN114698166B (en) * | 2020-12-29 | 2023-06-16 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus, noise suppressing method, heating control system, and storage medium |
DE102021208013A1 (en) * | 2021-07-26 | 2023-01-26 | E.G.O. Elektro-Gerätebau GmbH | Method of operating a kitchen appliance and kitchen appliance |
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US4112287A (en) * | 1976-11-04 | 1978-09-05 | White-Westinghouse Corporation | Central oscillator for induction range using triac burner controls |
JPS57179296U (en) * | 1981-05-08 | 1982-11-13 | ||
JPS5871587A (en) | 1981-10-22 | 1983-04-28 | 三洋電機株式会社 | Multiport induction heating cooking device |
JPS59149683A (en) | 1983-01-28 | 1984-08-27 | 株式会社東芝 | Induction heating cooking device |
US4564733A (en) * | 1983-08-11 | 1986-01-14 | Whirlpool Corporation | Current limiting control circuit for induction range |
JP2667008B2 (en) * | 1989-06-30 | 1997-10-22 | 株式会社東芝 | Electromagnetic cooker |
JPH09185986A (en) * | 1995-12-28 | 1997-07-15 | Sanyo Electric Co Ltd | Electromagnetic cooker |
DE19813996A1 (en) | 1998-03-28 | 1999-10-07 | Aeg Hausgeraete Gmbh | Cooker with structure for heating both by induction and resistance |
US6528770B1 (en) * | 1999-04-09 | 2003-03-04 | Jaeger Regulation | Induction cooking hob with induction heaters having power supplied by generators |
FR2792158B1 (en) | 1999-04-09 | 2001-05-18 | Jaeger Regulation | MODULAR INDUCTION COOKING FIREPLACE WITH REDUCED RADIATION AND METHOD OF MAKING |
JP3884664B2 (en) * | 2002-03-01 | 2007-02-21 | 松下電器産業株式会社 | Induction heating device |
ES2201937B1 (en) | 2003-11-03 | 2005-02-01 | Bsh Electrodomesticos España, S.A. | PROCEDURE FOR THE OPERATION OF A CONVERTER CIRCUIT. |
-
2005
- 2005-05-04 DE DE102005021888A patent/DE102005021888A1/en not_active Withdrawn
-
2006
- 2006-05-02 WO PCT/EP2006/004081 patent/WO2006117182A1/en active Application Filing
- 2006-05-02 CN CN2006800230030A patent/CN101208994B/en not_active Expired - Fee Related
- 2006-05-02 EP EP06742762A patent/EP1878309B1/en not_active Revoked
- 2006-05-02 PL PL06742762T patent/PL1878309T3/en unknown
- 2006-05-02 KR KR1020077025580A patent/KR101260086B1/en not_active IP Right Cessation
- 2006-05-02 JP JP2008509361A patent/JP5027115B2/en not_active Expired - Fee Related
- 2006-05-02 ES ES06742762T patent/ES2389935T3/en active Active
-
2007
- 2007-11-02 US US11/934,480 patent/US7910865B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006117182A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2392223A1 (en) * | 2010-12-27 | 2012-12-05 | BSH Electrodomésticos España S.A. | Cooking device |
EP4044767A4 (en) * | 2019-10-07 | 2023-11-08 | LG Electronics Inc. | Induction heating device and method for controlling induction heating device |
Also Published As
Publication number | Publication date |
---|---|
US20080087661A1 (en) | 2008-04-17 |
CN101208994A (en) | 2008-06-25 |
CN101208994B (en) | 2011-11-02 |
PL1878309T3 (en) | 2012-12-31 |
KR101260086B1 (en) | 2013-05-02 |
ES2389935T3 (en) | 2012-11-05 |
WO2006117182A1 (en) | 2006-11-09 |
US7910865B2 (en) | 2011-03-22 |
EP1878309B1 (en) | 2012-07-25 |
DE102005021888A1 (en) | 2007-02-15 |
JP5027115B2 (en) | 2012-09-19 |
JP2008541343A (en) | 2008-11-20 |
KR20080020987A (en) | 2008-03-06 |
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