EP2055144A1 - Verfahren und anordnung zur leistungsversorgung einer induktionsheizeinrichtung - Google Patents
Verfahren und anordnung zur leistungsversorgung einer induktionsheizeinrichtungInfo
- Publication number
- EP2055144A1 EP2055144A1 EP07801786A EP07801786A EP2055144A1 EP 2055144 A1 EP2055144 A1 EP 2055144A1 EP 07801786 A EP07801786 A EP 07801786A EP 07801786 A EP07801786 A EP 07801786A EP 2055144 A1 EP2055144 A1 EP 2055144A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching means
- pulse widths
- wave
- dead times
- pulse width
- 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
- H05B6/06—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 power to an induction heating device and to an arrangement for supplying power to an induction heating device.
- Such induction heating devices are used for example as induction coils in induction hobs.
- induction hobs 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 cause of the strong effects of the harmonics or, in particular, of the third harmonic lies essentially in the fact that the permeability of the magnetic components in the frequency converter changes with the amplitude of the inductor current flowing through the induction coil.
- the permeability of ferrites or the like which are used in an induction coil for field guidance, and those of the pot material decreases.
- the invention has for its object to provide an aforementioned method and a suitable arrangement with which problems of the prior art can be avoided and in particular reduced without changing the operating frequency at higher power at induction heaters network interference or distortion of power consumption from the supply network can be.
- a pulse width of the control of the switching means or of the frequency converter is changed in the course of a half-wave in a first basic embodiment of the invention. This is done by making a pulse width of a first switching means shorter and a pulse width of another second switching means longer by the half-time of a half-wave. In the second half of the half-wave, the pulse widths are again changed so that they are the same length again until the end of the half-wave. Preferably, the sum of the pulse widths (G1, G2) remains the same. The change may be unbalanced at half time.
- a change in the pulse widths is carried out symmetrically at half-time.
- a frequency converter or the power supply for the induction heating device may have a series resonant circuit. This consists of an induction coil for power transmission, resonant circuit capacitors and a half-bridge with switchable switching means. Such series resonant circuits are basically known for induction heating devices.
- the change in the pulse widths can be 10% to 40%.
- Particularly advantageous pulse widths are changed a maximum of 25%, so shortened or extended.
- both pulse widths are shortened in all or in two existing in a series resonant circuit switching means such that the dead times are extended in between. This also takes place in the course of a half-wave, whereby the dead times become longer until the half-time of the half-wave and then shorter again. In these dead times none of the switching means is driven.
- a change in the dead times is advantageously at a maximum of 100%, ie a maximum of doubling the dead times between the shortest dead time and the longest dead time. Particularly advantageously, the maximum change is somewhat lower, for example at 50% to 80%.
- the power at the induction coil can be reduced somewhat to reduce harmonics and thus reduce network perturbations.
- a shortening of the switch-on times or pulse widths of the switching means takes place, as well as the extension of the dead times, advantageously symmetrically to the half-time of the half-wave. So a uniform control and power generation is possible.
- a change of a pulse width or a dead time over a mains half-wave takes place as evenly as possible or distributed.
- a distribution may be such that the change of the pulse width or the dead time substantially corresponds to a sinusoidal curve.
- only one control is provided for a change in the switch-on, the pulse widths or the dead times of the switching means and no control. This eliminates the feedback for a control loop and the effort, in particular the Bescharisaufwand is considerably lower.
- An aforementioned arrangement thus has a frequency converter with a resonant circuit which is constructed from the induction coil, resonant circuit capacitors and a half-bridge with switchable switching means. Furthermore, a drive device for the switching means is provided, wherein the operating frequency or the switch-on times of the switching means can be influenced. In particular, so that the pulse widths or the dead times can be changed as mentioned above, wherein the operating frequency is equal and a pulse width shortened or a dead time is extended.
- FIG. 2 is a circuit diagram of an arrangement for powering an induction coil according to the invention
- Fig. 3 shows the progressions of the pulse widths and the dead times near the
- FIG. 4 shows the curves similar to FIG. 3 near the high point of a half-wave with changed pulse widths
- Fig. 5 shows the curves similar to Fig. 3 near the high point of a half-wave with changed dead times
- Fig. 6 shows the time courses of the impedance of the induction coil, the operating voltage, the amplitude of the inductor current, the pulse widths and the dead times according to the invention.
- FIG. 2 shows an arrangement or circuit arrangement 11 according to the invention.
- a controller 13 controls a frequency converter 15 on with two switching means Ti and T 2 , for example transistors. These form together with a DC link capacitor Cz w and resonant circuit capacitors C s the drive for the induction coil L. Above the control 13, the operating frequency for the switching means Ti and T 2 and thus the frequency converter 15 is given above all. Thus, the pulse widths G and the dead times H are given.
- 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 cost of controlling the pulse width G and the dead times H of the frequency converter 15 and the switching means Ti and T 2 is not particularly high. In particular, if their courses are given fixed or controlled by a control process, the effort is limited because you can work with predetermined progressions.
- FIG. 3 shows in a diagram the pulse widths G1 and G2 as well as the dead times H1 and H2 of the transistors T1 and T2 according to FIG. 2 at a time in the vicinity or at the line zero crossing. It can be seen from this that both the pulse widths G1 and G2 take the same length. Likewise, the intermediate dead times H1 and H2 are also the same length at this time.
- the pulse widths are changed according to the aforementioned first basic embodiment of the invention.
- the change in the pulse widths G1 is, as can be seen from FIG. 6, itself a sinusoidal curve or has a sinusoidal profile.
- the minimum pulse width G1 is found at the middle or high point of a network half-wave.
- the course G2, which is not shown, results from mirroring the profile for G1 on a line which runs horizontally through the maximum values for G1 in such a way that the sum (G1 + G2) is always constant.
- FIG. 5 it is shown how deviating from FIG. 4, although the pulse widths G1 and G2 remain the same, but the dead times H1 and H2 are changed therebetween.
- the dead times H1 and H2, ie before the respective pulse width G1 and G2, are extended by approximately 60% in comparison to FIG. Again, the schematic for H1 of Fig. 6 can be taken and at the same time for H2.
- both basic embodiments of the invention can be used together.
- the change in the pulse width or the dead time should be as analog or mirror-symmetrical as possible or in small steps over a mains half-wave.
- the formation of harmonics can be reduced or avoided, and on the other hand, it is possible to avoid noise generation as a result of resulting jumps in performance.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Inverter Devices (AREA)
- Induction Heating Cooking Devices (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL07801786T PL2055144T3 (pl) | 2006-08-25 | 2007-08-21 | Sposób i układ do zasilania mocą indukcyjnego urządzenia grzejnego |
| SI200730166T SI2055144T1 (sl) | 2006-08-25 | 2007-08-21 | Postopek in naprava za močnostno napajanje indukcijske grelne naprave |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006041964A DE102006041964A1 (de) | 2006-08-25 | 2006-08-25 | Verfahren und Anordnung zur Leistungsversorgung einer Induktionsheizeinrichtung |
| PCT/EP2007/007350 WO2008022765A1 (de) | 2006-08-25 | 2007-08-21 | Verfahren und anordnung zur leistungsversorgung einer induktionsheizeinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2055144A1 true EP2055144A1 (de) | 2009-05-06 |
| EP2055144B1 EP2055144B1 (de) | 2010-01-20 |
Family
ID=38564481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07801786A Not-in-force EP2055144B1 (de) | 2006-08-25 | 2007-08-21 | Verfahren und anordnung zur leistungsversorgung einer induktionsheizeinrichtung |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US7688601B2 (de) |
| EP (1) | EP2055144B1 (de) |
| JP (1) | JP5021743B2 (de) |
| CN (1) | CN101507351B (de) |
| AT (1) | ATE456285T1 (de) |
| CA (1) | CA2659168A1 (de) |
| DE (2) | DE102006041964A1 (de) |
| ES (1) | ES2339721T3 (de) |
| PL (1) | PL2055144T3 (de) |
| SI (1) | SI2055144T1 (de) |
| WO (1) | WO2008022765A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100172167A1 (en) * | 2009-01-08 | 2010-07-08 | Yang Ye | Method and apparatus of an improvement in pwm switching patterns |
| EP2328384B1 (de) * | 2009-11-27 | 2017-03-15 | Electrolux Home Products Corporation N.V. | Induktionskochfeld und Verfahren zur Steuerung des Induktionskochfelds |
| CN104902600B (zh) * | 2014-03-06 | 2018-03-16 | 美的集团股份有限公司 | 电磁加热装置及其的控制方法 |
| ES2673132B1 (es) * | 2016-12-19 | 2019-03-28 | Bsh Electrodomesticos Espana Sa | Dispositivo de aparato de cocción por inducción. |
| CN108738179B (zh) * | 2017-04-14 | 2021-06-18 | 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 |
| DE112017007811A5 (de) * | 2017-08-02 | 2020-04-16 | Diehl Ako Stiftung & Co. Kg | Induktionsheizgerät |
| CN109688649B (zh) * | 2017-10-19 | 2021-02-26 | 佛山市顺德区美的电热电器制造有限公司 | 电磁加热设备、电磁加热系统及其控制方法和装置 |
| EP4581902A1 (de) * | 2022-08-30 | 2025-07-09 | BSH Hausgeräte GmbH | Gargerätevorrichtung |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE408518B (sv) * | 1974-05-17 | 1979-06-11 | Matsushita Electric Industrial Co Ltd | Induktionsuppvermningsanordning |
| CA1053761A (en) * | 1974-12-13 | 1979-05-01 | White-Westinghouse Corporation | Induction cooking apparatus |
| CN2195175Y (zh) * | 1994-06-04 | 1995-04-19 | 王昆生 | 开关型调压控流变频感应加热装置 |
| FR2726704B1 (fr) * | 1994-11-07 | 1997-01-31 | Breda Jean Pierre | Generateur haute frequence a resonance pour un appareil de chauffage a induction |
| US6528770B1 (en) * | 1999-04-09 | 2003-03-04 | Jaeger Regulation | Induction cooking hob with induction heaters having power supplied by generators |
| US6727482B2 (en) * | 2001-01-12 | 2004-04-27 | Nicholas Bassill | Apparatus and method for inductive heating |
| US6870144B2 (en) * | 2002-12-24 | 2005-03-22 | Lg Electronics Inc. | Inverter circuit of induction heating rice cooker |
| US7403400B2 (en) * | 2003-07-24 | 2008-07-22 | Harman International Industries, Incorporated | Series interleaved boost converter power factor correcting power supply |
| DE102005028829A1 (de) | 2005-06-14 | 2007-01-11 | E.G.O. Elektro-Gerätebau GmbH | Verfahren und Anordnung zur Leistungsversorgung einer Induktionsheizeinrichtung |
-
2006
- 2006-08-25 DE DE102006041964A patent/DE102006041964A1/de not_active Withdrawn
-
2007
- 2007-08-21 EP EP07801786A patent/EP2055144B1/de not_active Not-in-force
- 2007-08-21 JP JP2009524951A patent/JP5021743B2/ja not_active Expired - Fee Related
- 2007-08-21 DE DE502007002692T patent/DE502007002692D1/de active Active
- 2007-08-21 WO PCT/EP2007/007350 patent/WO2008022765A1/de not_active Ceased
- 2007-08-21 AT AT07801786T patent/ATE456285T1/de active
- 2007-08-21 CN CN2007800316411A patent/CN101507351B/zh not_active Expired - Fee Related
- 2007-08-21 SI SI200730166T patent/SI2055144T1/sl unknown
- 2007-08-21 ES ES07801786T patent/ES2339721T3/es active Active
- 2007-08-21 CA CA002659168A patent/CA2659168A1/en not_active Abandoned
- 2007-08-21 PL PL07801786T patent/PL2055144T3/pl unknown
-
2009
- 2009-02-25 US US12/392,147 patent/US7688601B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008022765A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5021743B2 (ja) | 2012-09-12 |
| EP2055144B1 (de) | 2010-01-20 |
| US7688601B2 (en) | 2010-03-30 |
| WO2008022765A1 (de) | 2008-02-28 |
| PL2055144T3 (pl) | 2010-06-30 |
| DE502007002692D1 (de) | 2010-03-11 |
| SI2055144T1 (sl) | 2010-03-31 |
| CN101507351A (zh) | 2009-08-12 |
| DE102006041964A1 (de) | 2008-04-03 |
| CN101507351B (zh) | 2012-02-15 |
| CA2659168A1 (en) | 2008-02-28 |
| ATE456285T1 (de) | 2010-02-15 |
| JP2010501973A (ja) | 2010-01-21 |
| ES2339721T3 (es) | 2010-05-24 |
| US20090160413A1 (en) | 2009-06-25 |
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