EP1935214A2 - Induktionsheizeinrichtung und zugehöriges betriebs- und topferkennungsverfahren - Google Patents
Induktionsheizeinrichtung und zugehöriges betriebs- und topferkennungsverfahrenInfo
- Publication number
- EP1935214A2 EP1935214A2 EP06818258A EP06818258A EP1935214A2 EP 1935214 A2 EP1935214 A2 EP 1935214A2 EP 06818258 A EP06818258 A EP 06818258A EP 06818258 A EP06818258 A EP 06818258A EP 1935214 A2 EP1935214 A2 EP 1935214A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- low
- resonant circuit
- point
- switching means
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 80
- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 32
- 230000010355 oscillation Effects 0.000 claims description 56
- 239000003990 capacitor Substances 0.000 claims description 35
- 238000010411 cooking Methods 0.000 claims description 34
- 230000003111 delayed effect Effects 0.000 claims description 2
- 230000003534 oscillatory effect Effects 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 description 9
- 238000013016 damping Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 230000004044 response Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
-
- 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
- H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
- H05B2213/05—Heating plates with pan detection means
Definitions
- the invention relates to a method for operating an induction heating device according to the preamble of claim 1, a method for pan detection for an induction heating device according to the preamble of claim 9 and an induction heating device according to the preamble of claim 10.
- Induction cooking appliances or induction cookers are becoming increasingly popular. Advantageous is their high efficiency and the rapid response to a change in the cooking level.
- the disadvantage is the high price compared to glass ceramic hobs with radiant heaters.
- Induction cooking appliances usually comprise one or more induction heating devices associated with a respective cooking area with an induction coil which is supplied with an alternating voltage or an alternating current, whereby eddy currents are induced in a cookware to be heated which is magnetically coupled to the induction coil.
- the eddy currents cause heating of the cookware.
- the mains input or AC line voltage is usually first rectified by means of a rectifier into a DC supply voltage or DC link voltage and then to generate the high-frequency drive voltage by means of one or more switching means, generally insulated gate bipolar. Transistors (IGBT), processed.
- IGBT insulated gate bipolar. Transistors
- a widespread in Europe converter variant forms a half-bridge circuit of two IGBTs, wherein the induction coil and two capacitors, which are connected in series between the intermediate circuit voltage and the reference potential, form a series resonant circuit.
- the induction coil is connected to a connection to a connection point of the two capacitors and to its other connection to a connection point of the two IGBTs forming the half-bridge.
- This converter version is powerful and reliable, but relatively expensive due to the two IGBTs required.
- a variant optimized from a cost point of view uses only one switching means or an IGBT, wherein the induction coil and a capacitor form a parallel resonant circuit. Between the output terminals of the rectifier, parallel to the DC link capacitor, the parallel resonant circuit of induction coil and capacitor and the IGBT are connected in series.
- this converter variant there is a risk that in unfavorable operating conditions, for example, when using unfavorable cookware, an overload of the components can be caused. This usually leads to a reduced service life of such induction heating devices.
- the object of the invention is therefore to provide a method for operating an induction heater, a method for pan detection for an induction heater and an induction heater, in which the induction heaters have a converter with only one switching means or an IGBT and the operating conditions change allow a reliable and component-saving operation with high life of the induction heater.
- the invention achieves this object by a method for operating an induction heater according to claim 1, a method for pan detection for an induction heater according to claim 9 and an induction heater according to claim 10.
- the inventive method is used to operate an induction heating with an induction coil, a capacitor which is connected in parallel to the induction coil, wherein the induction coil and the capacitor form a parallel resonant circuit, and a controllable switching means, in series with the parallel resonant circuit between one of an AC line voltage generated DC link voltage and a reference potential is looped in and is controlled such that a vibration of the parallel resonant circuit is effected during a heating operation.
- the maximum value is preferably less than 50V, more preferably less than 10V. This allows a particularly component-preserving and thus low-wear operation of the induction heater, since the switching means is switched on exactly when there is no or only a small voltage at the connection node of the parallel resonant circuit and the switching means.
- the oscillating circuit is supplied with just enough energy during the charging or charging phase that the voltage at the connecting node of the parallel resonant circuit and the switching means in the subsequent oscillation cycle just swings back to the desired voltage value, ie in the low or high voltage Reversing point has the desired voltage level. If the on-time is set too short, the voltage at the node in the subsequent oscillation cycle is too high at the bottom, causing a current spike when the switch is turned on.
- the reference voltage is preferably the ground potential.
- all suitable voltage-resistant switching means can be used as the switching means, in particular, these are high-voltage-proof insulated gate bipolar transistors (IGBTs).
- IGBTs high-voltage-proof insulated gate bipolar transistors
- the switch-on time duration is determined or adjusted such that a low-point voltage in subsequent oscillation cycles is equal to the reference voltage. In this case, the switch-on of the switching means is virtually de-energized.
- the switch-on time duration is increased in comparison with a switch-on time period of a preceding oscillation cycle when the low-point voltage exceeds a predetermined threshold value.
- a stepwise adjustment or regulation of the low-point voltage can be achieved. If the low point voltage in one oscillation cycle n is too high, this means that too little energy was fed into the resonant circuit in one oscillation cycle n-1, i. the switch-on time was too short.
- the switch-on period is therefore to be increased, for example, with a predetermined step size. If, in the oscillation cycle n + 1, the low-point voltage again exceeds the threshold value, the on-time is increased again.
- the on-time can also be reduced from a low point voltage of OV in successive oscillation cycles until, for example, the low point voltage is slightly greater than OV but less than an adjustable threshold. In this way, a dynamic tracking of the switch-on time is possible if the resonant circuit parameters, for example, due to a displacement of a cooking vessel on a hotplate change.
- the lowest point of the oscillation or of the respective oscillation cycles is determined by derivation or differentiation. Determining a voltage waveform at the connection node of the parallel resonant circuit and the switching means determined. By deriving the low point of the voltage curve or a vibration cycle can be easily determined, since there the value of the derivative is zero.
- the low-point voltage is compared with a reference voltage and, depending on the result of the comparison, a comparison signal is generated which indicates whether the low-point voltage is greater or less than the reference voltage.
- the reference voltage is generated as a function of the switching state of the switching means.
- a cooking vessel is located on a cooking surface or heating zone associated with the induction heater, wherein a cooking vessel is detected when no low points of vibration cycles at the connection node of the parallel resonant circuit and the switching means can be determined in the area of a zero crossing of the mains AC voltage.
- the damping of the resonant circuit depends strongly on whether a cooking vessel is in a heating zone of the induction heater or not. When a magnetically acting cooking vessel is placed on a cooking surface, the resonant circuit damping increases greatly, because the resonant circuit energy is removed, which is absorbed by the cooking vessel.
- the DC link voltage decreases so much in the range of a zero crossing of the AC line voltage that no training with detectable low points more. Consequently, if no low points are detectable in the area of the zero crossing of the network, it can be deduced that a cooking vessel is present. This is possible continuously during an active heating operation.
- the switching means is closed for a short time, whereby an oscillation of the parallel resonant circuit is excited.
- the number of oscillation cycles occurring is determined by determining and counting low points of the oscillation at a connection node of the parallel resonant circuit and the switching means.
- the presence of a cooking pot or pot is determined depending on whether the number of oscillation cycles falls below a predefinable threshold.
- a resonant circuit damping is dependent on whether or not a cooking vessel is located in a heating zone of the induction heating device.
- the resonant circuit damping increases sharply. In this case, no oscillation and hence no low points of the oscillation are detectable after just a few oscillation cycles or periods. If no cooking vessel is placed on a cooking surface, the vibration and thus also the low points of the vibration is much longer detectable, i. the number of counted or countable low points is much larger compared to the more damped oscillation with a cooking vessel. The number of counted low points can therefore be used as an indicator of the presence of a cooking vessel.
- the induction heating device which is particularly suitable for carrying out one of the aforementioned methods, comprises , ,
- an induction coil a capacitor, which is connected in parallel to the induction coil, wherein the induction coil and the capacitor form a parallel resonant circuit, and a controllable switching means, which is looped in series with the parallel resonant circuit between a DC link voltage and a reference voltage and is driven such that during a heating operation, a vibration of the parallel resonant circuit is effected.
- a subsampling device for determining a low point of a vibration cycle at a connection node of the parallel resonant circuit and the switching device, a low-voltage detection device for detecting a low-point voltage at the low point of the oscillation cycle and a control device coupled to the low-point detection device and the low-point voltage determination device, which is set up such that the Switching means is turned on in the low point of the oscillation cycle for a turn-on, which is determined in dependence on the low-point voltage such that a low-point voltage in subsequent oscillation cycles does not exceed a predetermined maximum value.
- the control unit may be, for example, a microcontroller.
- the low-point detection device comprises a first capacitor, a first resistor, an overvoltage limiting means, in particular a Zener diode, and a second resistor, wherein the first capacitor, the first resistor and the overvoltage limiting means connect in series between the connection nodes of the parallel resonant circuit and the switching means and a reference potential are looped in and the second resistor is connected between a supply voltage and a connection node of the first resistor and the overvoltage limiting means and at the connection node of the first resistor and the overvoltage limiting means is present a low point signal indicating a low point.
- the named components form a differentiator that differentiates or derives a voltage curve at the connection node of the parallel resonant circuit and the switching means. In this way, a low-level detection of the voltage curve can be realized simply because the transition from a negative to a positive slope of the voltage curve, a rising edge of the low-level signal is generated.
- the second resistor causes the low point signal to be raised to a supply voltage level at a constant voltage at the connection node.
- the subsurface voltage determination device comprises a voltage divider, which is looped between the connection nodes of the parallel resonant circuit and the switching means and a reference potential and generates a divided oscillating circuit voltage, a Referenzwoodser- generating device for generating a reference voltage and a comparator, with the resonant circuit voltage and the reference voltage is applied and in response generates a comparator signal indicating whether the resonant circuit voltage is greater or less than the reference voltage.
- the low-point voltage determination device preferably comprises a delay element which outputs the oscillatory circuit voltage to the comparator with a delay. This allows easier evaluation of the comparator signal in the control unit
- the reference voltage generating device is set up such that the reference voltage is generated as a function of the switching state of the switching device.
- 1 is a circuit diagram of an embodiment of an induction heater
- FIG. 2 shows signal waveforms of signals of the induction heating device of FIG. 1 during a heating operation
- FIG. 3 shows waveforms of the signals of FIG. 2 during pot detection, if there is no pot
- Fig. 4 shows waveforms of the signals of Fig. 2 during pot detection, if a pot is present.
- Fig. 1 shows a circuit diagram of an embodiment of an induction heater with terminals 1 for connecting an AC mains voltage UN, for example, with 230V and 50Hz mains frequency, which is rectified by a bridge rectifier 2.
- a bridge rectifier 2 At an exit of the bridge rectifier 2 is connected to a so-called DC link voltage UZ, which is buffered by a DC link capacitor 3.
- An induction coil 4 and a capacitor 25 are connected in parallel and form a parallel resonant circuit.
- a controllable switching means in the form of an IGBT 24 and a current measuring resistor 23 are connected in series with the parallel resonant circuit between the intermediate circuit voltage UZ and a reference potential in the form of the ground voltage GND.
- the IGBT 24 is driven by a control unit in the form of a microcontroller 19, wherein a driver circuit 20 is looped between a control output of the microcontroller 19 and the gate terminal of the IGBT 24 to generate the necessary drive level of the IGBT.
- a freewheeling diode 26 is connected in parallel with the collector-emitter path of the IGBT 24.
- a measuring voltage applied to the current measuring resistor 23 is filtered by an RC filter from the resistor 22 and the capacitor 21 and applied to an associated input of the microcontroller 19.
- the DC link capacitor 3 After applying the mains AC voltage UN or when the induction heater is not operated in a heating mode, the DC link capacitor 3 charges to a peak value of the mains AC voltage UN, for example, to 325V at 230V AC line voltage.
- a voltage UC at the collector of the IGBT or at a connection node N1 of the parallel resonant circuit and the IGBT assumes approximately ground potential GND, since the current measuring resistor 23 is dimensioned very low.
- the induction heating device is operated in such a way or the IGBT 24 is controlled such that the resonant circuit in the charging phase, i. when the IGBT 24 is switched on, just enough energy is supplied that the voltage UC at the node N1 or at the collector of the IGBT 24 will swing through to the ground potential GND in a subsequent oscillation cycle.
- a switch-on period of the IGBT 24 is suitable to choose. Just at the time when the voltage UC at node N1 has reached its lowest potential, i. at the low point of a vibration cycle, the IGBT 24 must be turned on again to recharge the resonant circuit for the subsequent oscillation cycle or the subsequent period.
- a low-point detection device in the form of a capacitor 5, a resistor 7, an overvoltage limiting means in the form of a Zener diode 12 and a resistor 6 is provided in that the resistor 7 and the Zener diode 12 are connected in series between the connection node N1 and the ground potential GND and the resistor 6 is connected between a supply voltage UV and a connection node N2 of the resistor 7 and the Zener diode 12.
- At the connection node N2 is a signal or a voltage TS, whose history indicates a low point.
- the voltage UC is derived or differentiated at the node N1 or between the collector and the emitter of the IGBT 24, ie at or shortly after the low point of a vibration cycle at the node N1 turns a rising edge of the voltage TS.
- the zener diode 12 limits the occurring voltage levels of the voltage TS to values which can be processed by the microcontroller 19, for example to approximately -0.6V to 5.6V. For example, with a rising oscillation at the node N1, the voltage TS assumes voltage values of approximately + 5V and during a declining oscillation values of approximately -0.6V, for example.
- the voltage UC at the node N1 does not change, for example, when the IGBT 24 is turned on, a positive potential is applied to the cathode of the Zener diode 12 via the resistor 6. Consequently, when the differentiated voltage at the node N1 changes from negative values to positive values or from negative values to a value of zero, a positive voltage edge arises at the Zener diode 12 or the voltage TS.
- the voltage TS is transmitted via a diode 13 to an associated input of the microcontroller 19 for evaluation.
- the microcontroller 19 can therefore detect a low point of a vibration cycle at the node N1 based on a rising edge of the voltage TS, and turn on the IGBT 24 synchronously to the low point.
- a drive voltage of the IGBT 24 is divided down by a voltage divider of resistors 8 and 14 to an evaluable level and fed back.
- the diode 13, between the voltage TS and the associated input of the microcontroller 19 is looped, causes in conjunction with the feedback drive voltage that the second rising edge of the voltage TS is transmitted to the input of the microcontroller 19.
- a low-voltage detection means in the form of a voltage divider of resistors 9 and 15, which is connected between the connection nodes N1 and GND are grounded and produce a divided oscillator circuit voltage US, a reference voltage generating device with resistors 10 and 11 for generating a reference voltage UR and a comparator 18 is provided, which is acted upon by the resonant circuit voltage US and the reference voltage UR and generates a comparator signal UK in dependence thereon , which indicates whether the resonant circuit voltage US is greater or smaller than the reference voltage UR, and is applied to an associated input of the microcontroller 19 for evaluation.
- the resonant circuit voltage US is limited by a diode 16 to about 0.7V, which is looped between the input of the comparator 18, on which the resonant circuit voltage US is applied, and ground GND.
- a capacitor 17 connected in parallel to the diode 16 causes a change in the voltage UC at the node N1 at the input of the comparator 18 to take effect only with a slight delay.
- the resistors 10 and 11 for generating the reference voltage UR are connected in series between the control output of the microcontroller 19 for driving the IGBTs 24 and the supply voltage UV, wherein the reference voltage UR is present at the connection node between the resistors 10 and 11.
- the reference voltage UR is consequently generated as a function of the switching state of the switching means or of the level of a voltage UTR at the control output of the microcontroller MC.
- the resistors 10 and 11 are dimensioned in such a way that the reference voltage UR when the IGBT 24 is switched on is smaller than the forward voltage of the diode 16 and, when the IGBT 24 is switched off, greater than the forward voltage of the diode 16.
- the comparator signal UK always signals, independently of the voltage UC at the node N1, that the resonant circuit voltage US is smaller than the reference voltage UR.
- the resonant circuit voltage US is approximately OV, since at on or through IGBT 24 in about OV at the collector or on Waiting for node N1. Consequently, the comparator signal UK always signals after expiration of the delay time that the resonant circuit voltage US is smaller than the reference voltage UR.
- the induction heating device shown is operated such that the switch-on time of the IGBT 24 is synchronized with the low point of the voltage UC at the node N1 or the collector voltage.
- the switch-on time or the switch-off time of the IGBT 24 is determined by the minimum oscillator energy, which is necessary for swinging the voltage UC at the node N1 to the ground potential when the IGBT 24 is switched off. Therefore, to determine the associated turn-on time, the microcontroller 19 increases the on-time of the IGBT 24 until the voltage UC at the time of turn-on, i. at the vibration low, less than a predefined value near OV. This switch-on time or operating point corresponds to the smallest continuous power output.
- Smaller powers are set by applying the conventional so-called 1/3 or 2/3 half-wave operation and, if necessary, additionally clocking the IGBT 24 by periodically switching it on and off.
- An increase in power within a half cycle is possible by extending the switch-on period beyond the minimum switch-on period described above.
- FIG. 2 shows the voltage UC, the signal or the voltage TS and the voltage UTR at the control output of the microcontroller 19 for controlling the operation of the induction heating device the driver 20 or the IGBT 24 is used.
- a low level of the voltage UTR causes a turn on of the IGBT 24 and a high level a lock.
- the voltage UC is approximately 0V when the IGBT is ON and the voltage TS is approximately 5V.
- the voltage UC increases approximately sinusoidally in a first oscillation cycle.
- the voltage TS remains unchanged at approx. 5V.
- the voltage UC has exceeded its peak value, it decreases sinusoidally to about OV.
- the voltage TS goes slowly back to about OV.
- the voltage UTR at its control output in the case shown a level of OV of the voltage UTR causes a switched IGBT 24.
- the IGBT remains switched on for so long or the voltage UTR remains at a level of OV for so long that the energy fed into the resonant circuit is just sufficient for the voltage UC to just go back through to OV in a subsequent, second oscillation cycle.
- the described method is repeated for the subsequent oscillation cycles.
- FIG. 3 shows waveforms of the signals of FIG. 2 during pan detection if there is no pot
- FIG. 4 shows waveforms during pan detection in case a pot is present.
- the voltage UTR of the IGBT 24 is initially switched through briefly by a short voltage pulse, whereby a vibration of the parallel resonant circuit is excited.
- a positive edge of the voltage TS is generated.
- the microcontroller 19 counts the positive edges and thus the number of occurring oscillation cycles.
- the flanks or low point number in FIG. 3 exceed the defined threshold value, ie, by definition, there is no cooking vessel in the heating zone. Since the number of edges in Fig. 4 falls below the threshold, it can be concluded that a cooking vessel in the heating zone.
- the evaluation of the low points or the use of the subsurface detection device can consequently be used for optimum operation of the induction heating device and for pan detection during a heating operation and for pan detection for enabling the heating operation.
- the embodiments shown enable a reliable and component-saving operation of the induction heater, although it has a converter with only one switching means or an IGBT.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06818258T PL1935214T3 (pl) | 2005-10-14 | 2006-10-13 | Indukcyjne urządzenie grzejne i przynależny sposób eksploatacji i rozpoznawania garnka |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005050036A DE102005050036A1 (de) | 2005-10-14 | 2005-10-14 | Induktionsheizeinrichtung und zugehöriges Betriebs- und Topferkennungsverfahren |
PCT/EP2006/009915 WO2007042317A2 (de) | 2005-10-14 | 2006-10-13 | Induktionsheizeinrichtung und zugehöriges betriebs- und topferkennungsverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1935214A2 true EP1935214A2 (de) | 2008-06-25 |
EP1935214B1 EP1935214B1 (de) | 2014-04-30 |
Family
ID=37622266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06818258.3A Active EP1935214B1 (de) | 2005-10-14 | 2006-10-13 | Induktionsheizeinrichtung und zugehöriges betriebs- und topferkennungsverfahren |
Country Status (9)
Country | Link |
---|---|
US (1) | US8901466B2 (de) |
EP (1) | EP1935214B1 (de) |
JP (1) | JP5255445B2 (de) |
CN (1) | CN101326856B (de) |
CA (1) | CA2625764A1 (de) |
DE (1) | DE102005050036A1 (de) |
ES (1) | ES2480941T3 (de) |
PL (1) | PL1935214T3 (de) |
WO (1) | WO2007042317A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2282606A1 (de) | 2009-08-05 | 2011-02-09 | Coprecitec, S.L. | Steuerungsverfahren für eine Induktionsvorrichtung und Induktionsvorrichtung |
CN103731945A (zh) * | 2012-10-11 | 2014-04-16 | 美的集团股份有限公司 | 防止电磁加热装置停振的控制方法及控制电路 |
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DE102005050038A1 (de) * | 2005-10-14 | 2007-05-24 | E.G.O. Elektro-Gerätebau GmbH | Verfahren zum Betrieb einer Induktionsheizeinrichtung |
DE102006046408A1 (de) * | 2006-09-20 | 2008-04-03 | Hansgrohe Ag | Einrichtung zur Dampferzeugung für eine Dampfkabine und Dampfkabine |
ES2356441B1 (es) * | 2008-12-19 | 2012-03-13 | Bsh Electrodomésticos España, S.A. | Campo de cocción con un inductor, un inversor y un dispositivo de conexión. |
ES2352772B1 (es) * | 2008-12-19 | 2012-01-26 | Bsh Electrodomésticos España, S.A. | Campo de cocción con varios elementos de calentamiento y al menos un grupo constructivo de la electrónica de potencia. |
US9006624B2 (en) | 2010-07-22 | 2015-04-14 | General Electric Company | Resonant frequency detection for induction resonant inverter |
EP2506662B1 (de) * | 2011-04-02 | 2016-09-07 | Electrolux Home Products Corporation N.V. | Induktionskochfeld mit Topferkennungsvorrichtung und Verfahren zum Betreiben eines Induktionkochfelds |
WO2013064329A1 (en) | 2011-11-03 | 2013-05-10 | Arcelik Anonim Sirketi | An induction heating cooker |
EP2774260B9 (de) | 2011-11-03 | 2016-01-06 | Arçelik Anonim Sirketi | Induktionsherd |
EP2774452A1 (de) * | 2011-11-03 | 2014-09-10 | Arçelik Anonim Sirketi | Induktionsherd |
EP2774453B1 (de) | 2011-11-03 | 2015-08-05 | Arçelik Anonim Sirketi | Induktionsherd |
US9066373B2 (en) | 2012-02-08 | 2015-06-23 | General Electric Company | Control method for an induction cooking appliance |
US9344006B2 (en) | 2012-05-29 | 2016-05-17 | Infineon Technologies Austria Ag | Driving circuit for a transistor |
ITTO20120896A1 (it) | 2012-10-15 | 2014-04-16 | Indesit Co Spa | Piano cottura a induzione |
US10605464B2 (en) | 2012-10-15 | 2020-03-31 | Whirlpool Corporation | Induction cooktop |
EP2741570B1 (de) * | 2012-12-04 | 2016-04-06 | Electrolux Home Products Corporation N.V. | Verfahren und Steuereinheit zur Steuerung eines Kochvorgangs auf einem Induktionskochfeld |
EP2744299A1 (de) * | 2012-12-11 | 2014-06-18 | BSH Bosch und Siemens Hausgeräte GmbH | Hausgeräteinduktionsheizvorrichtung |
ES2606687T3 (es) * | 2012-12-12 | 2017-03-27 | Arçelik Anonim Sirketi | Placa cocción de calentamiento por inducción |
DE102013209720A1 (de) | 2013-05-24 | 2014-11-27 | E.G.O. Elektro-Gerätebau GmbH | Verfahren zum Ermitteln eines Stroms und Induktionsheizeinrichtung |
DE102013220734B3 (de) * | 2013-10-14 | 2014-12-11 | E.G.O. Elektro-Gerätebau GmbH | Verfahren zum Betreiben einer Induktionsheizeinrichtung und Induktionsheizeinrichtung |
DE102013221145B4 (de) * | 2013-10-17 | 2015-10-08 | E.G.O. Elektro-Gerätebau GmbH | Induktionsheizeinrichtung |
EP2999302B1 (de) * | 2014-09-18 | 2019-11-27 | Electrolux Appliances Aktiebolag | Induktionskochfeld und Verfahren zur Erkennung der Präsenz eines Kochgeschirrs |
CN105790546B (zh) * | 2014-12-17 | 2018-09-04 | 佛山市顺德区美的电热电器制造有限公司 | 电磁谐振电路及其控制方法和控制系统 |
CN105992419B (zh) * | 2015-03-04 | 2022-09-06 | 佛山市顺德区美的电热电器制造有限公司 | 电磁加热系统及其开关管的过零开通检测方法、装置 |
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- 2006-10-13 ES ES06818258.3T patent/ES2480941T3/es active Active
- 2006-10-13 EP EP06818258.3A patent/EP1935214B1/de active Active
- 2006-10-13 CA CA002625764A patent/CA2625764A1/en not_active Abandoned
- 2006-10-13 JP JP2008534941A patent/JP5255445B2/ja not_active Expired - Fee Related
- 2006-10-13 CN CN2006800463488A patent/CN101326856B/zh not_active Expired - Fee Related
- 2006-10-13 WO PCT/EP2006/009915 patent/WO2007042317A2/de active Application Filing
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2008
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Cited By (4)
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EP2282606A1 (de) | 2009-08-05 | 2011-02-09 | Coprecitec, S.L. | Steuerungsverfahren für eine Induktionsvorrichtung und Induktionsvorrichtung |
US8405411B2 (en) | 2009-08-05 | 2013-03-26 | Coprecitec, S.L. | Control method for an induction apparatus, and induction apparatus |
CN103731945A (zh) * | 2012-10-11 | 2014-04-16 | 美的集团股份有限公司 | 防止电磁加热装置停振的控制方法及控制电路 |
CN103731945B (zh) * | 2012-10-11 | 2015-12-02 | 美的集团股份有限公司 | 防止电磁加热装置停振的控制方法及控制电路 |
Also Published As
Publication number | Publication date |
---|---|
CA2625764A1 (en) | 2007-04-19 |
EP1935214B1 (de) | 2014-04-30 |
JP2009512146A (ja) | 2009-03-19 |
WO2007042317A2 (de) | 2007-04-19 |
US20100006563A1 (en) | 2010-01-14 |
PL1935214T3 (pl) | 2014-09-30 |
CN101326856B (zh) | 2012-05-30 |
US8901466B2 (en) | 2014-12-02 |
DE102005050036A1 (de) | 2007-05-31 |
CN101326856A (zh) | 2008-12-17 |
ES2480941T3 (es) | 2014-07-29 |
WO2007042317A3 (de) | 2007-08-02 |
JP5255445B2 (ja) | 2013-08-07 |
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