EP2200398A1 - Verfahren zur Stromversorgung mit der Leistung von zwei Induktoren und Kochgerät, bei dem dieses Verfahren umgesetzt ist - Google Patents

Verfahren zur Stromversorgung mit der Leistung von zwei Induktoren und Kochgerät, bei dem dieses Verfahren umgesetzt ist Download PDF

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EP2200398A1
EP2200398A1 EP09290980A EP09290980A EP2200398A1 EP 2200398 A1 EP2200398 A1 EP 2200398A1 EP 09290980 A EP09290980 A EP 09290980A EP 09290980 A EP09290980 A EP 09290980A EP 2200398 A1 EP2200398 A1 EP 2200398A1
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Prior art keywords
power
inductors
power supply
phase
inductor
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French (fr)
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EP2200398B1 (de
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Etienne Alirol
Didier Gouardo
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Groupe Brandt SAS
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FagorBrandt SAS
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    • 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 present invention relates to a power supply method of two inductors connected in parallel on the same power phase of a power supply.
  • the present invention relates to the power supply of the inductors of a cooking appliance, and in particular of a domestic hob using induction heating.
  • the inductors are respectively powered by inverters controlled at a working frequency according to the set power assigned to each inductor.
  • the inductor When the working frequency of the inverter is equal to the resonant frequency of the resonant circuit formed by the inductor and a kitchen utensil placed thereon, the inductor generates in the kitchen utensil as much power as possible and when the inverter is controlled to move the operating frequency away from this resonant frequency, the power generated by the inductor decreases.
  • the power delivered by the inductor or the power output varies depending on the container to be heated disposed on the inductor (size of the container, material, position relative to the inductor).
  • the power delivered at the inductor is measured by measuring a mean current flowing in the resonant circuit formed by the inductor and the container and multiplying the value of the average current by the value of the supply voltage.
  • This restored power is compared to the requested power demand and the working frequency of the inverter is modified to approach by the value of the power restored by the inductor, the value of the nominal power.
  • One solution to avoid the generation of noise is to mount the inductors in parallel on the same power phase of a power supply and to supply these inductors by inverters controlled by the same frequency generator.
  • hobs are known in which the inductors are powered by inverters controlled by a signal of identical frequency.
  • This mode of operation is therefore only well suited when the reference powers assigned by the user to the two inductors are close to one another.
  • Such a feeding device is known in the document FR 2 773 014 , in which each inductor is continuously supplied by an inverter, the adjustment of the consumed power being achieved by changing the operating frequency of the inverter.
  • the inductors are powered on a pro rata temporis of the requested power demand.
  • the instantaneous power is slaved to the sum of the reference power values associated with the two inductors, the sum of the nominal power values being limited in this case by the permissible power by an inductor.
  • the object of the present invention is to solve the abovementioned drawbacks and to propose a power supply method for two inductors connected in parallel, making it possible to optimize the power operating range of these two inductors, powered by inverters controlled by a same frequency generator.
  • the present invention relates to a power supply method with reference power values of two inductors connected in parallel on the same power phase of a power supply and powered respectively by two inverters controlled by the same generator. frequency.
  • the supply method comprises a cyclic power supply step over predetermined periods, the power supply step comprising, on each predetermined period, a mixed feed phase composed of a phase of supply in parallel of the two inductors in which the two inductors are respectively powered by said two inverters controlled at the same working frequency and alternating supply phase of the two inductors.
  • the power control is performed from the sum of the average powers delivered by the inductors, so that it is close to the sum of the set power values.
  • the average powers delivered by each inductor may themselves be remote from the value of the desired power associated with each inductor.
  • the parallel power supply phase smooths the power delivered by the inductors and the alternating power phase enables idle phases to be given during the operation of each inverter, avoiding overheating and premature wear of the electronic components used. artwork.
  • a first duration of the parallel power supply phase, a second duration of the alternating power supply phase and instantaneous power supply powers of the inductors during the parallel and alternating power supply phases are determined so that that the average powers delivered over said predetermined period by the inductors associated respectively with containers to be heated are substantially equal respectively to the reference power values respectively associated with the two inductors.
  • the power supply method in accordance with the invention thus makes it possible to guarantee that the average powers delivered by the inductors are as close as possible to the reference power values associated with each inductor by adjusting the times and the instantaneous powers of power on the inductors. two feeding phases, in parallel and alternating.
  • the instantaneous power admitted by each inductor fed by an inverter being between a minimum continuous power and a maximum continuous power
  • the mixed feed phase is implemented at least when the sum of the values setpoint power is greater than the maximum continuous power and at least one of the setpoint power values is less than a predetermined threshold value, greater than or equal to the value of the minimum continuous power.
  • an alternating power supply mode would necessarily lead to at least one of the inductors not reaching the desired reference power value.
  • the predetermined threshold value is substantially equal to a maximum value of minimum continuous power admitted by the two inductors.
  • At least one of the setpoint power values associated with an inductor is less than the minimum DC power value, a supply phase in parallel with an instantaneous power value necessarily greater than the continuous power value. minimum would then exceed the setpoint value associated with this inductor.
  • the two inductors are supplied with several alternating pulses during the alternating power supply phase.
  • the method comprises a preliminary step of determining the predetermined period as a function of the instantaneous powers of supply of the inductors during the phase of supply in parallel and alternately.
  • This preliminary step makes it possible to modify the value of the predetermined period during the supply of two inductors associated with containers to be heated, in order to better take into account instantaneous power differences during the supply step.
  • the method comprises a step of analyzing the inductors associated respectively with containers to be heated, this step being adapted to determine a function between the period of the chopper signal generated by the frequency generator controlling said inverters and instantaneous power supplying each inductor, said analysis step comprising measurements implemented for a sample of target power values allocated to said two inductors.
  • This analysis step makes it possible to know the power distribution during a phase of supply in parallel of the two inductors, this distribution being dependent in particular on the type of container (size, material) and its positioning above each inductor .
  • a cooking appliance and in particular a cooking hob, comprising at least two cooking hobs respectively comprising two inductors connected in parallel on the same power phase of a power supply and respectively powered respectively.
  • two inverters controlled by the same frequency generator comprises a processing unit adapted to to control at one and the same operating frequency said inverters and to implement a method of supplying power to power values of said two inductors according to the invention.
  • This cooking appliance has characteristics and advantages similar to those described above in relation to the power supply method used.
  • the electric cooking appliance is an induction cooktop 10 comprising four cooking hobs F1, F2, F3, F4.
  • Each cooking zone F1, F2, F3, F4 respectively comprises an inductor mounted on a power phase of a power supply 11, typically a mains power supply.
  • the hob is powered by 32 amps that can provide a maximum power of 7200 W at the hob 10, a power of 3600 W per phase.
  • each inductor of the firing heaters F1, F2, F3, F4 can in practice be made from one or more coils in which the electric current flows.
  • a control and power control card 12 makes it possible to support all the electronic and computer means necessary for controlling the hob 10.
  • the cooking hobs can also be identified by screen printing vis-à-vis the inductors placed under the cooking surface.
  • the hob 10 also comprises control and interface means 14 with the user, in particular enabling the user to control in power and in duration the operation of each focus F1, F2, F3, F4.
  • This cooktop has similar features and the same numerical references as the cooktop shown in figure 1 .
  • the embodiment of the figure 2 has only three foci, F1 foci, F2 identical to those previously described, and a larger F5 dual focus.
  • This double F5 fireplace is usually made of a central inductor and an annular inductor.
  • the central inductor is operated in isolation when a small container is placed on the F5 and the two inductors are operated simultaneously with larger containers.
  • the inductors of each home are mounted in pairs in parallel on the same power phase of the power supply.
  • the inductors associated with the first two foci F1, F2 are connected in parallel with a first power phase of the power supply, and the inductors associated with the other two foci F3, F4 are connected in parallel with the second power phase of the power supply. power supply.
  • figure 2 the inductors associated with the first two foci F1, F2 are connected in parallel on a first phase of the power supply, and the concentric inductors associated with the focal point F5 are connected in parallel with a second power phase of the power supply.
  • these two inductors I1, I2 are connected in parallel on a power phase of the power supply and controlled respectively by two inverters 31, 32.
  • Each inductor I1, I2 is connected in parallel with a capacitor C1, C2.
  • the inductor I1, I2 and the capacitor C1, C2 then form a resonant circuit whose resonant frequency varies as a function of the receptacle disposed above the inductor I1, I2.
  • Each inverter 31, 32 can operate from any electronic switching means, and for example, from a voltage-controlled transistor type switch, known as IGBT (acronym for the term " Insulated Gate Bipolar Transistor "). This switch is associated with a freewheeling diode.
  • IGBT Insulated Gate Bipolar Transistor
  • Such an inverter is conventionally used in an induction cooktop and need not be described in more detail here.
  • each inverter 31, 32 is controlled at a frequency F T1 , F T2 .
  • This frequency command is managed by a processing unit 33.
  • the processing unit 33 is adapted to control the frequency at which the transistors of the inverters 31, 32 are conductive or lock.
  • the frequency signals F T1 , F T2 are identical for each inductor I1, I2 and hereinafter called working frequency F T.
  • the operation of the inverters 31, 32 at an identical working frequency F T thus makes it possible to eliminate the interference at the level of the inductors I1, I2, and thus to avoid the generation of annoying audible noise for the user.
  • the processing unit 33 is thus adapted to control a frequency generator 34 adapted to generate an identical working frequency F T for each inverter 31, 32.
  • measuring means 35, 36 respectively adapted to measure the current flowing between each inverter 31, 32 and the associated inductors I1, I2.
  • These measuring means 35, 36 make it possible in particular to measure the peak current Imax1, Imax2 and the switched current Icom1, Icom2 at the output of each inverter 31, 32.
  • the peak current Imax is deduced from the instantaneous current flowing in each inverter 31, 32.
  • the switching current Icom current for which the switch or associated freewheeling diode becomes conductive, is also deduced from the instantaneous current measured at the output of the inverter.
  • the processing algorithm described below makes it possible to distribute the power on each inductor I1, I2 taking into account different parameters.
  • the power distribution performed by the processing algorithm must make it possible to obtain at each inductor I1, I2 a power output close to the desired power demanded by the user.
  • This restored power corresponds. the power restored by each inductor I1, I2 over a predetermined period of time, hereinafter referred to as the Tprog program period.
  • the value of the program period Tprog is determined according to a maximum number of power variations allowed in one minute.
  • Tprog program period of fixed duration of the order of 10 s.
  • a setpoint power is defined by the user for the one and / or the other inductor I1, I2.
  • P1d is defined as the power demanded on the inductor I1 and P2d, the power demanded on the inductor I2.
  • a test step E41 first makes it possible to check whether the power at the hob 10 is requested only on one of the two inductors I1, I2.
  • the minimum continuous power allowed PminCont1, PminCont2 on each inductor I1, I2 depends in particular on the inverter 31, 32, and in particular the operation of the IGBT switch, that is to say, its switching possibilities.
  • the permissible minimum continuous power value PminCont1, PminCont2 can be between 600 and 1800 W depending on the operating temperature, the type of container and its size, and the size of the inductor.
  • the minimum continuous power admitted PminCont can be here equal to 1400 W.
  • PminCont1 for each inductor I1, I2 corresponds, for the period of the switching signal T generated by the frequency generator 34, a minimum value Tmin1, Tmin2 allowed.
  • the supply of the inductor I1 is carried out in a simple cut-off mode.
  • the inductor I1 is thus powered by controlling the inverter 31 with a decoding signal.
  • period Tmin1 corresponding to the minimum allowed value, dependent on the minimum continuous power allowed PminCont1.
  • the inductor I1 For each program period Tprog, the inductor I1 is supplied on a pro rata temporis of this period to reach the value of the requested power P1d.
  • the supply of the inductor I1 can be carried out according to a simple continuous mode illustrated in FIG. figure 5 .
  • the inductor I1 is continuously supplied by switching of the inverter 31 according to a working frequency F T associated with the requested power P1d.
  • the requested power P1d on the inductor I1 must also be less than a maximum allowed continuous power PmaxCont1 by the inductor I1, also dependent on the components of the inverter 31, and in particular the IGBT switch.
  • this maximum continuous power admitted PmaxCont1 can be of the order of 2300 W.
  • PmaxCont2 by each inductor I1, I2 corresponds to a maximum value Tmax1, Tmax2 allowed for the period of the switching signal T sent by the frequency generator 34 to the inverter 31, 32.
  • test steps E43, E44 are successively checked if each receptacle associated with each inductor I1, I2 accepts a mode operation. parallel.
  • the two inductors I1, I2 are supplied simultaneously with a respective control signal associated with the same period of the switching signal T, equal to the value Tp in this parallel mode.
  • the processing unit 33 is adapted to control the power so that the two powers measured on each inductor I1, I2 are not too far respectively from the setpoint value P1d, P2d and the sum of the measured powers. are not too far from the sum of the setpoints P1d + P2d.
  • a comparison step E45 also makes it possible to check whether the sum of the requested powers P1d + P2d is greater than the maximum continuous power allowed PmaxCont1, PmaxCont2 by each inductor I1, I2.
  • PmaxCont Max PmaxCont ⁇ 1 , PmaxCont ⁇ 2
  • the supply of the two inductors I1, I2 is carried out alternately as illustrated in FIG. figure 5 .
  • a test step E46 also makes it possible to check whether the sum of the powers requested P1d + P2d is less than the minimum continuous power allowed PminCont1, PminCont2 on each inductor I1, I2.
  • PminCont min PminCont ⁇ 1 , PminCont ⁇ 2
  • the supply of the two inductors I1, I2 is implemented according to an incomplete alternating mode.
  • the supply of the two inductors I1, I2 is implemented in a complete alternating mode.
  • the alternating power supply power Palt of each inductor I1, I2 is fixed at the minimum permissible continuous power PminCont.
  • the operating time of the inverters 31, 32 supplying each inductor I1, I2 is determined, over each program period Tprog, so that the average power P1m, P2m over this program period Tprog, restored by each inductor I1, I2, is the as close as possible to the requested power P1d, P2d.
  • the two inductors I1, I2 are supplied with several alternating pulses during the program period Tprog in order to homogenise the time the power supplied to each inductor I1, I2.
  • This length of the smallest pulse ⁇ is set by the processing unit 33 and corresponds to the minimum time necessary to alternate the operation of the two inverters 31, 32 at the level of the processing unit 33.
  • this smaller pulse length ⁇ may be of the order of 100 milliseconds.
  • the requested power P2d on the inductor I2 is lower than the requested power P1d on the inductor I1, the requested power P2d controls the number of pulses of smaller length ⁇ .
  • a number n of pulses ⁇ of alternation is thus obtained. Then dividing the overall operating time of the inductor I1 over the program period Tprog, calculated pro rata temporis to obtain the requested power P1d on the inductor I1 by addressing the instantaneous power Palt on the inductor I1, by the number n pulses ⁇ , it is possible to determine the length of each operating pulse of the first inductor I1.
  • the complete alternating mode is implemented in the same way, preferably by alternating pulses ⁇ over the program period Tprog.
  • the alternating power Palt supplied to each inductor I1, I2 is for example equal to the sum of the requested powers P1d + P2d since this sum of the reference powers is well between the minimum value of the maximum permissible continuous powers PmaxCont1 , PmaxCont2 and the maximum value of the permissible minimum continuous powers PminCont1, PminCont2 by the inductors I1, I2.
  • the lowest power demand on the two inductors I1, I2 determines the number n of pulses ⁇ of alternation over the program period Tprog, the length of each pulse ⁇ of alternation depending on the power demanded on each inductor I1, I2.
  • a power supply step on each program period Tprog, in which a mixed power phase is implemented, composed of a power supply phase. parallel of the two inductors I1, I2 and an alternating supply phase of the two inductors I1, I2.
  • the total power consumed is controlled by the power supplied by the mains supply, and for example, is equal to 3600 W.
  • each power P1p and P2p is not necessarily equal although the working frequency F T of the inverters 31, 32, corresponding to the period of the switching signal Tp, is identical.
  • a test step E48 then makes it possible to compare the period of the switching signal Tp during parallel operation to the minimum value Tmin allowed for the period of the switching signal T and to the maximum value Tmax allowed for the period of the switching signal. T.
  • Tmin and Tmax depend on the electronic components and are related to the powers PminCont1, PminCont2 and PmaxCont1, PmaxCont2 that can be delivered by switching the inverters 31, 32.
  • the minimum value Tmin allowed for the period of the chopper signal T is the maximum value of the minimum values Tmin1, Tmin2 allowed for the period of the chopping signal T on each inverter 31, 32 and the maximum value Tmax allowed for the period of the chime signal.
  • switching T is the minimum value of the maximum values Tmax1, Tmax2 allowed for the period of the switching signal T on each inverter 31, 32:
  • Tmin max Tmin ⁇ 1 , Tmin ⁇ 2
  • Tmax min Tmax ⁇ 1 , Tmax ⁇ 2
  • the parallel mode can not be implemented and, at the end of the step E48 test, the complete alternating mode is implemented as described above.
  • the period of the parallel switching signal Tp lies between the minimum value Tmin and the maximum value Tmax allowed for the period of the switching signal, it is determined for one first inductor, and for example the inductor I1, the instantaneous power on this inductor according to the characterization of the container described above.
  • a comparison step E50 again makes it possible to verify that the value of the instantaneous power P1p during the parallel phase is much greater than the minimum continuous power allowed PminCont1 by the inductor I1 and lower than the maximum continuous power allowed PmaxCont1 by the inductor. I1.
  • the parallel mode can not be implemented and the power supply method of the two inductors I1, I2 implements as indicated above the complete alternating mode.
  • calculation steps E51 and comparison E52 are implemented in a similar manner to the calculation steps E49 and comparison E50 for the second inductor I2.
  • the parallel mode can not be implemented and the power supply method of the two inductors I1, I2 implements as indicated above the complete alternating mode.
  • the threshold value Vs is greater than or equal to the minimum permissible continuous power value PminCont1, PminCont2 for each inductor I1, I2.
  • the threshold value Vs is preferably greater than the values of the permissible minimum continuous power PminCont1, PminCont2 in order to artificially increase the power demanded on each inductor I1, I2 so as to limit the temperature rise of the IGBT switches.
  • the threshold value Vs may also be equal to the maximum value of the permissible minimum continuous power PminCont1 for the inductor I1 and the minimum continuous power admitted PminCont2 for the inductor I2.
  • the threshold value Vs may be between 1400 W and 1700 W.
  • this threshold value Vs may be equal to 1650 W.
  • the mixed feed phase is implemented when at least one of the set power values P1d, P2d is lower than this threshold value Vs.
  • the maximum value of the reference power values P1d, P2d at the threshold value Vs is compared with the comparison step E53.
  • the complete parallel mode can not be implemented, and the incomplete parallel mode is then implemented as will be described later with reference to FIG. figure 5 .
  • the complete parallel mode can not be implemented without departing too far from the user-requested setpoint values P1d, P2d and the incomplete parallel mode is then implemented.
  • the parallel power supply can then be used to supply the two inductors I1, I2 simultaneously during the entire program period Tprog.
  • this mixed feed is implemented when the sum of the two requested powers P1d and P2d is greater than the maximum continuous power admitted PmaxCont by the inductors I1, I2, and here substantially equal to 2300 W, and when at least 1 one of the two requested powers P1d, P2d is less than a predetermined threshold value Vs, of the order of the minimum continuous power admitted PminCont by the inductors I1, I2.
  • the mixed feed phase implements an alternating parallel mode during a program period Tprog.
  • the program period Tprog is a succession of sector periods.
  • the number of sector periods which constitute the program period Tprog is determined as a function of the power difference existing between the instantaneous power P1 p, P2p supplying the inductors I1, I2 during the parallel phase and the instantaneous power Palt supplying the inductors I1, I2 during the alternating phase.
  • the sum of the two absorbed powers P1p + P2p by each inductor I1, I2 is equal to the power available on the supply phase, and here 3600 W.
  • each inductor I1, I2 are equal and between a value of 1800 W and 2300 W.
  • the system consisting of the inductors I1, I2 absorbs 3600 W during the phase parallel feeding phase. mixed feed, then the instantaneous power Palt sent alternately on the two inductors I1, I2.
  • This power difference thus makes it possible to determine beforehand the maximum length of the program period Tprog.
  • Tprog program period of sufficiently long length for example equal to 15 seconds, likely to be suitable for the largest power difference, of the order of 1800 W.
  • the duration of the program period Tprog can be variable and determined case by case as a function of the actual difference between the instantaneous powers P1p, P2p.
  • the program period Tprog can vary between 4 and 15 s.
  • the user thus has a feeling of regularity in the power delivered to the container.
  • the duration Np of the parallel supply phase, the duration Nalt of the alternating power supply phase and the instantaneous powers P1 p, P2p, the supply voltage of the inductors I1, I2 during the supply phases in parallel and alternately are determined such that the average powers P1m, P2m delivered over the program period Tprog by the inductors I1, I2 associated respectively with containers to be heated are close to the desired power values P1d, P2d respectively associated with the two inductors I1, I2 and requested by the user.
  • the method implements calculation means making it possible to determine the duration Np of the parallel feeding phase.
  • N1alt and N2alt being the respective duration of supply during the alternating phase of each inductor I1, I2, that is to say the overall duration of supply of each inductor I1, I2.
  • np NPROG ⁇ Palt 2 - Palt ⁇ P ⁇ 1 ⁇ m + P ⁇ 2 ⁇ m / Palt 2 - Palt ⁇ P ⁇ 1 ⁇ p + P ⁇ 2 ⁇ p .
  • P1p and P2p are known by the calculation and P1 m and P2m are equal to the requested setpoints P1d and P2d.
  • the duration Np of the parallel supply phase is thus determined as a function of the duration Nprog of the program period Tprog, of the power Palt in the alternating phase, of the reference powers P1d, P2d requested on each inductor I1, I2 and instantaneous powers P1 p, P2p absorbed by each inductor I1, I2 during the parallel supply phase.
  • the value of the power Palt is necessarily between the maximum value of the minimum permissible continuous powers PminCont1, PminCont2 by the inductors I1, I2 and the minimum value of the maximum permissible continuous powers PmaxCont1, PmaxCont2 by the inductors I1, I2, that is, that is, between approximately 1400 W and 2300 W.
  • a value of the high power Palt for example at least 1800 W.
  • this value of the instantaneous power Palt can be set to the minimum value of the maximum permissible continuous powers PmaxCont1, PmaxCont2.
  • the value of the power Palt during the alternating phase it is possible to determine by the Flicker standard the value of the duration Nprog of the program period Tprog by the difference between the power consumed during the parallel phase (here 3600 W corresponding to the power of the mains phase) and the power consumed during the alternating power phase Palt.
  • this value of the duration Nprog can also be fixed and equal for example to 10 s.
  • One solution during the alternating feed phase is successively supplying the inductor I1 for a duration N1alt then the inductor I2 for a duration N2alt, or vice versa.
  • a second solution as illustrated in figure 5 consists of cutting into several pulses each duration N1alt, N2alt of the alternate feeding phase of each inductor I1, I2 in order to smooth the power distribution on the containers and to obtain a better average of the power in the container.
  • the distribution of the power supply on several alternating pulses is implemented starting from the minimum power demanded on one or the other of the two inductors I1, I2 and the minimum length of each pulse ⁇ , composed of a number of periods mains.
  • the number n of pulses ⁇ of minimum length obtained by division can not not be integer, so that, for example, the last building pulse ⁇ of the first inductor I1 is greater than the minimum length.
  • the duration of each pulse ⁇ for the alternate supply phase of the second inductor I2, obtained by division may also not correspond to an integer so that the duration of certain pulses ⁇ are prolonged to distribute the duration global N2alt on the alternating power phase.
  • the sum of the duration of the pulses ⁇ is equal to the overall duration N1alt, N2alt calculated for each inductor I1, I2 during the alternate feeding phase.
  • the mixed feed phase implements an incomplete parallel mode and comprises a parallel feed phase followed by an alternating feed phase in which only one of the inductors I1, I2 is fed, that is, ie the inductor I1, I2 for which the reference power P1d, P2d is greater than the predetermined threshold value Vs.
  • This mixed feed mode coupling a parallel power supply and alternating power supply inductors I1, I2 makes it possible to obtain at best on each inductor I1, I2 the requested reference power P1d, P2d during each program period Tprog.
  • An analysis step is carried out prior to a parallel supply phase or a mixed feed phase of inductors I1, I2.
  • this analysis step is carried out regularly during the power supply of the two inductors I1, I2, since the position of the pan on the furnace F1, F2 can vary during cooking and that the behavior
  • the resonant of the system constituted by the inductor I1, I2 and the pan can be modified in time, as the temperature rise in the container.
  • the analysis step comprises for each inductor I1, I2 a series of measurements implemented for a sample of target power values assigned to each inductor I1, I2.
  • the sample of nominal power values may comprise in particular a minimum reference power value Pmin equal to the minimum continuous power value admitted PminCont1, PminCont2 by each inductor I1, I2 and a maximum reference power value Pmax equal to the permissible maximum continuous power value PmaxCont1, PmaxCont2 by each inductor I1, I2.
  • Samples of desired power values may also include intermediate command power values between the minimum setpoint power value Pmin and the maximum setpoint power value Pmax used previously.
  • a relationship of the type P A x T + B is thus defined for each inductor I1, I2 covered with a container.
  • this relationship makes it possible to know the instantaneous power distribution on each inductor I1, I2, in particular when it operates in parallel with a period of the switching signal Tp.
  • the maximum setpoint power values Pmax and minimum Pmin are very close to each other, that is to say that the curve illustrated in FIG. the figure 6 is a straight segment of very small dimensions, or even reduced to a point, the operation of this system in parallel with another inductor-container system will not be possible.
  • the working frequency F T can be determined from the functions determined during the analysis step, connecting the period of the signal of cutting T p generated by the frequency generator 34 controlling the two inverters 31, 32 and the instantaneous power P1 p, P2p supplying each inductor I1, I2, the sum of the instantaneous powers P1p, P2p supplying each inductor I1, I2 during the parallel mode being equal to the maximum power provided by the power phase of the power supply.
  • a parallel supply phase can not be implemented for a container R2 (white square curve) and a container R6 (black diamond curve).
  • At least one of the instantaneous powers P1p, P2p can be outside the limits of authorized powers, for example between 1400 and 2300 Watts.
  • This type of container can be powered at low power.
  • the invention can be implemented with a half-bridge generator structure.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)
  • General Induction Heating (AREA)
  • Cookers (AREA)
  • Induction Heating Cooking Devices (AREA)
EP09290980A 2008-12-22 2009-12-21 Verfahren zur Stromversorgung mit der Leistung von zwei Induktoren und Kochgerät, bei dem dieses Verfahren umgesetzt ist Revoked EP2200398B1 (de)

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PL09290980T PL2200398T3 (pl) 2008-12-22 2009-12-21 Sposób zasilania mocą dwóch induktorów oraz urządzenie do gotowania realizujące wspomniany sposób

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FR0858975 2008-12-22

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EP2200398B1 EP2200398B1 (de) 2011-08-10

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Cited By (10)

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EP2469972A1 (de) * 2010-12-27 2012-06-27 BSH Bosch und Siemens Hausgeräte GmbH Gargerätevorrichtung
EP2469971A1 (de) * 2010-12-27 2012-06-27 BSH Bosch und Siemens Hausgeräte GmbH Gargerätevorrichtung
ES2392612A1 (es) * 2011-03-31 2012-12-12 Bsh Electrodomésticos España, S.A. Dispositivo electrodoméstico.
EP2605614A1 (de) * 2011-12-13 2013-06-19 FagorBrandt SAS Vorrichtung zur Stromversorgung über einen Wechselrichter, insbesondere für ein Induktionskochgerät
WO2013064967A3 (de) * 2011-11-04 2013-08-15 BSH Bosch und Siemens Hausgeräte GmbH Induktionsheizvorrichtung
EP2506669B1 (de) 2011-03-29 2016-10-12 BSH Hausgeräte GmbH Schaltungsvorrichtung
EP2590475A3 (de) * 2011-11-04 2018-06-20 BSH Hausgeräte GmbH Induktionsheizvorrichtung
ES2754813A1 (es) * 2018-10-17 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de Aparato de cocción
EP3809800A1 (de) 2019-10-18 2021-04-21 Groupe Brandt Verfahren zur leistungsteuerung mindestens eines induktors, und induktionskochgerät für die umsetzung dieses verfahrens
EP4195875A1 (de) 2021-12-10 2023-06-14 SABAF S.p.A. Induktionskochfeld und verfahren zur steuerung eines induktionskochfelds

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
ES2564888B1 (es) * 2014-09-24 2017-01-05 BSH Electrodomésticos España S.A. Dispositivo de aparato de cocción y procedimiento para la puesta en funcionamiento de un dispositivo de aparato de cocción

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US4847746A (en) 1987-03-20 1989-07-11 Deutsche Thomson-Brandt Gmbh Inverter to feed a load having an inductive component
EP0460279A2 (de) * 1990-06-07 1991-12-11 Matsushita Electric Industrial Co., Ltd. Kochstelle mit Induktionserwärmung
FR2773014A1 (fr) 1997-12-23 1999-06-25 Europ Equip Menager Dispositif d'alimentation de plusieurs circuits resonants par un generateur de puissance a onduleur
FR2783370A1 (fr) 1998-09-11 2000-03-17 Europ Equip Menager Dispositif d'alimentation a onduleur dont la puissance delivree est controlee
WO2005043737A2 (de) * 2003-11-03 2005-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur vermeidung bzw. reduktion von störschall in einer umrichterschaltung bei gleichzeitigem betrieb mehrerer ausgänge
WO2006117182A1 (de) * 2005-05-04 2006-11-09 E.G.O. Elektro-Gerätebau GmbH Verfahren und anordnung zur leistungsversorgung mehrerer induktionsspulen bei einem induktionsgerät
EP1951003A1 (de) * 2007-01-23 2008-07-30 Whirlpool Corporation Verfahren zur Regelung eines Induktionskochfeldes und zur Ausführung dieses Verfahrens adaptiertes Induktionskochfeld

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US4847746A (en) 1987-03-20 1989-07-11 Deutsche Thomson-Brandt Gmbh Inverter to feed a load having an inductive component
EP0286044A2 (de) * 1987-04-10 1988-10-12 Thomson Electromenager S.A. Schaltung zur Stromversorgung einer induktiven Kochstelle
EP0460279A2 (de) * 1990-06-07 1991-12-11 Matsushita Electric Industrial Co., Ltd. Kochstelle mit Induktionserwärmung
FR2773014A1 (fr) 1997-12-23 1999-06-25 Europ Equip Menager Dispositif d'alimentation de plusieurs circuits resonants par un generateur de puissance a onduleur
FR2783370A1 (fr) 1998-09-11 2000-03-17 Europ Equip Menager Dispositif d'alimentation a onduleur dont la puissance delivree est controlee
WO2005043737A2 (de) * 2003-11-03 2005-05-12 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zur vermeidung bzw. reduktion von störschall in einer umrichterschaltung bei gleichzeitigem betrieb mehrerer ausgänge
WO2006117182A1 (de) * 2005-05-04 2006-11-09 E.G.O. Elektro-Gerätebau GmbH Verfahren und anordnung zur leistungsversorgung mehrerer induktionsspulen bei einem induktionsgerät
EP1951003A1 (de) * 2007-01-23 2008-07-30 Whirlpool Corporation Verfahren zur Regelung eines Induktionskochfeldes und zur Ausführung dieses Verfahrens adaptiertes Induktionskochfeld

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2469971A1 (de) * 2010-12-27 2012-06-27 BSH Bosch und Siemens Hausgeräte GmbH Gargerätevorrichtung
EP2469972A1 (de) * 2010-12-27 2012-06-27 BSH Bosch und Siemens Hausgeräte GmbH Gargerätevorrichtung
EP2506669B1 (de) 2011-03-29 2016-10-12 BSH Hausgeräte GmbH Schaltungsvorrichtung
ES2392612A1 (es) * 2011-03-31 2012-12-12 Bsh Electrodomésticos España, S.A. Dispositivo electrodoméstico.
EP2590475A3 (de) * 2011-11-04 2018-06-20 BSH Hausgeräte GmbH Induktionsheizvorrichtung
WO2013064967A3 (de) * 2011-11-04 2013-08-15 BSH Bosch und Siemens Hausgeräte GmbH Induktionsheizvorrichtung
CN103891401A (zh) * 2011-11-04 2014-06-25 Bsh博世和西门子家用电器有限公司 感应加热装置
CN103891401B (zh) * 2011-11-04 2016-03-09 Bsh家用电器有限公司 感应加热装置
EP2605614A1 (de) * 2011-12-13 2013-06-19 FagorBrandt SAS Vorrichtung zur Stromversorgung über einen Wechselrichter, insbesondere für ein Induktionskochgerät
ES2754813A1 (es) * 2018-10-17 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de Aparato de cocción
EP3809800A1 (de) 2019-10-18 2021-04-21 Groupe Brandt Verfahren zur leistungsteuerung mindestens eines induktors, und induktionskochgerät für die umsetzung dieses verfahrens
FR3102335A1 (fr) 2019-10-18 2021-04-23 Groupe Brandt Procédé de commande en puissance d'au moins un inducteur et appareil de cuisson à induction pour la mise en œuvre du procédé
EP4195875A1 (de) 2021-12-10 2023-06-14 SABAF S.p.A. Induktionskochfeld und verfahren zur steuerung eines induktionskochfelds

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PL2200398T3 (pl) 2012-01-31
ES2370296T3 (es) 2011-12-14
EP2200398B1 (de) 2011-08-10

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