EP2911472B2 - Dispositif d'appareil de cuisson, en particulier dispositif de plaque de cuisson, doté d'une pluralité d'onduleurs - Google Patents

Dispositif d'appareil de cuisson, en particulier dispositif de plaque de cuisson, doté d'une pluralité d'onduleurs Download PDF

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EP2911472B2
EP2911472B2 EP14198733.9A EP14198733A EP2911472B2 EP 2911472 B2 EP2911472 B2 EP 2911472B2 EP 14198733 A EP14198733 A EP 14198733A EP 2911472 B2 EP2911472 B2 EP 2911472B2
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European Patent Office
Prior art keywords
time
inverters
time intervals
control unit
inverter
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German (de)
English (en)
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EP2911472A3 (fr
EP2911472A2 (fr
EP2911472B1 (fr
Inventor
Luis Angel Barragan Perez
Alberto Dominguez Vicente
Sergio Llorente Gil
Arantxa Otin
Ramon Peinado Adiego
David Valeau Martin
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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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
    • 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
    • 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 is based on a cooking appliance device according to the preamble of claim 1.
  • Induction cooktops are known from the prior art which have two inverters and a control unit which is intended to operate the two inverters together periodically with one period and to operate them continuously at least within the period.
  • the control unit is provided for dividing the period duration into two time intervals.
  • an induction hob which has two inverters which are operated together periodically with a period.
  • a control unit can be provided for dividing the period duration into three time intervals, with none of the inverters being operated in one of the three time intervals. This operating mode is used in particular for low output powers.
  • a cooking appliance device with a first and a second heating frequency unit and with a control unit is known.
  • the control unit is intended to set a respective mean output power of the two heating frequency units while minimizing a flicker characteristic and to switch the two heating frequency units in a first time interval with a first set of frequencies and in a second time interval with a second set of frequencies that is different from the first set operate.
  • EP 2 506 666 A1 discloses a cooking appliance device with a first and a second heating frequency unit and a control unit, which is intended to operate the two heating frequency units together periodically with a period and to divide the period into at least two time intervals.
  • a heating device with a first and a second induction coil and a power supply unit which supplies the first induction coil with a first power and the second induction coil with a second power depending on a control signal.
  • the object of the invention consists in particular in providing a generic device with improved properties with regard to a power supply.
  • the object is achieved according to the invention by the features of patent claim 1, while advantageous configurations and developments of the invention can be found in the dependent claims.
  • the invention is based on a cooking appliance device, in particular a hob device, with a plurality of inverters, in particular at least two, preferably at least four and particularly preferably at least six inverters, which are each intended to operate at least one inductor, and with a control unit which is intended to operate at least some of the inverters together, at least in one operating state, and continuously at least within a first time window.
  • a cooking appliance device in particular a hob device
  • inverters in particular at least two, preferably at least four and particularly preferably at least six inverters, which are each intended to operate at least one inductor
  • a control unit which is intended to operate at least some of the inverters together, at least in one operating state, and continuously at least within a first time window.
  • the control unit is provided for dividing the first time window into a first number of time intervals which is greater by at least one, preferably by exactly one, than a second number of inverters to be operated simultaneously.
  • “A number of inverters to be operated simultaneously” should be understood to mean at least two inverters.
  • a number of time intervals corresponds to at least three time intervals.
  • a “cooking appliance device” is to be understood in particular as at least a part, in particular a subassembly, of a cooking appliance, in particular a hob and preferably an induction hob.
  • the cooking appliance device can also include the entire cooking appliance, in particular the entire hob and preferably the entire induction hob.
  • the inverters are intended to provide a high-frequency heating current for the inductors.
  • the inverters are operated in at least one operating state with a frequency of at least 1 kHz, advantageously at least 10 kHz, preferably at least 20 kHz and particularly preferably at most 100 kHz.
  • the high-frequency heating current flows in at least one operating state through at least one of the inductors and is intended in particular for heating, in particular cookware, in particular by eddy current and/or magnetic reversal effects.
  • a “time window” is to be understood in particular as a period of between 5 ms and 2.5 s, preferably between 8 ms and 2.3 s and particularly preferably between 9 ms and 2.1 s.
  • a minimum duration of the time window is specified by at least one flicker standard. Below this minimum period of time, the at least one flicker standard is violated.
  • a maximum duration of the time window is defined by a thermal inertia of the cooking utensil.
  • the control unit is preferably provided to subdivide an operating time of the cooking appliance device into at least one, preferably at least two, advantageously several time windows, preferably with the same time duration, which in particular follow one another directly.
  • “at least some of the inverters” should be understood to mean at least two inverters.
  • control unit is intended to "operate continuously" at least some of the inverters at least within a time window is to be understood to mean that the at least two inverters have a finite output power, at least within the time window, which is different from zero .
  • an “output power” of an inverter should be understood to mean, in particular, a power which is made available at at least one output of the inverter in at least one operating state.
  • the output power is fed to at least one inductor.
  • the output power preferably corresponds at least essentially to a power consumption of the inverter.
  • a “power consumption” of an inverter is to be understood in particular as power that is provided in particular by a power grid and is consumed by the inverter at least in one operating state.
  • the fact that the output power “at least essentially” corresponds to the power consumption of the inverter should be understood in this context to mean that the two power values deviate from one another by a maximum of 5%, preferably a maximum of 3% and particularly preferably a maximum of 1%.
  • a “time interval” should be understood to mean in particular a time period between 0.1 ms and 1.5 s, preferably between 1 ms and 1 s and particularly preferably between 0.1 s and 0.5 s.
  • the inverters are operated at least essentially with a constant output power, at least for the duration of one of the time intervals, which in particular has a relative fluctuation of at most 5%, preferably at most 3% and particularly preferably at most 1%.
  • a configuration according to the invention makes it possible to provide a generic device with improved properties with regard to a power supply. Furthermore, a maximum output power can advantageously be increased and/or in particular an efficiency of the cooking appliance device can be increased. Furthermore, operational reliability can advantageously be increased. Furthermore, the cooking appliance device can advantageously be adapted to different requirements. Furthermore, in particular a particularly uniform power output can be achieved and advantageously a selected setpoint power can be provided as exactly as possible.
  • the control unit is preferably provided for the purpose of switching at least two of the operated inverters, preferably all operated inverters, in at least one of the time intervals, preferably in all time intervals, in particular in all time intervals of a time window, with at least one moving by at least 15 kHz, preferably at least 16 kHz and particularly preferred to operate at least 17 kHz different frequency or the same frequency. In this way, in particular, a possible intermodulation hum can be reduced and/or avoided.
  • control unit is provided to operate the inverters operated in the first time window in such a way that for each of the operated inverters an output power averaged over the first time window corresponds at least essentially to a setpoint power assigned by the control unit.
  • the expression “to be operated in this way” is to be understood in this context in particular as meaning that the control unit is intended to select an operating parameter in such a way that an output power averaged over the first time window corresponds at least essentially to a setpoint power assigned by the control unit.
  • An "operating parameter” should be understood as meaning the duration of the time intervals and/or the frequency and/or a duty cycle and/or the output power of the inverters.
  • a "duty cycle” is to be understood in particular as a ratio of a time duration in which a periodic control signal of the inverter assumes a switch-on value within a period duration to the period duration of the control signal.
  • the output power of the inverters can be changed by changing the duty cycle.
  • an “average output power” is to be understood in particular as an output power averaged over time, which corresponds in particular to an arithmetic mean of the output powers of the individual time intervals of the time window, in particular an individual time window.
  • the phrase that the averaged output power “at least essentially” corresponds to a setpoint power assigned by the control unit is to be understood in particular to mean that the two power values deviate from one another by a maximum of 5%, preferably a maximum of 3% and particularly preferably a maximum of 1%.
  • a "setpoint power" is to be understood in particular as a power which is to be effectively provided by at least one of the inverters.
  • the setpoint power assigned by the control unit can correspond to a power selected by a user.
  • the total power consumption of the inverters is at least substantially constant, in particular in a time interval, at least in one operating state, at least over two consecutive time intervals, preferably at least within the first time window, a requested target power can advantageously be provided and the efficiency of the cooking appliance device can be increased. Furthermore, a flicker can be avoided at least to a large extent.
  • a total power consumption of the inverters, at least in one operating state is advantageously at least essentially constant over all successive time intervals, preferably at least within a time window.
  • a “total power consumption of the inverters” is to be understood in particular as a sum of the power consumptions of all operated inverters, in particular in a time interval.
  • a relative deviation in the total power consumption of the inverters in at least two consecutive time intervals is a maximum of 2%, preferably a maximum of 1.5% and particularly preferably a maximum of 1%.
  • a total power consumption of the inverters, in particular in a time interval, at least in one operating state is at least significantly different over at least two consecutive time intervals, preferably at least within the first time window.
  • a total power consumption of the inverters, at least in one operating state is advantageously at least significantly different over all time intervals, preferably at least within the first time window.
  • the phrase "at least significantly" different is to be understood in particular as meaning that a relative deviation in the total power consumption of the inverters in at least two consecutive time intervals is at least 2%, preferably at least 3% and particularly preferably at least 4% and in particular at most 40%, preferably at most 20% and particularly preferably a maximum of 10%. In this way, in particular, a maximum achievable power and/or a maximum achievable desired power can be increased.
  • an output power of at least one first inverter increases at least significantly in consecutive, in particular all, time intervals of the first time window and an output power of at least one second inverter in consecutive, in particular all, time intervals of the first time window at least significantly decreases.
  • an output power of an inverter “at least significantly increases and/or decreases” is to be understood in particular as meaning that a relative deviation in the power consumption of an inverter in successive time intervals is at least 2%, advantageously at least 10%, preferably at least 20% and in particular preferably at least 40%.
  • a flicker in particular can be reduced as a result.
  • operational reliability of the cooking appliance device can advantageously be increased, since in particular power fluctuations, in particular when changing between two intervals, can be minimized.
  • the second time window is directly adjacent to the first time window and that both time windows have the same number of time intervals with identical operating parameters, with the time intervals of the second time window being arranged in the reverse order compared to the time intervals of the first time window.
  • a "reverse order" is to be understood in particular as meaning that the control unit is intended to arrange the time intervals of the first time window in the second time window in such a way that the time intervals in the second time window are mirrored in comparison to an end point of the first time window have order.
  • an “end point of the first time window” is to be understood in particular as a point in time of the first time window which in particular directly adjoins a further time window, preferably the second time window.
  • the time intervals of the second Timeslots can also be arranged in any order. As a result, flicker can be further reduced and operational reliability, in particular when lifting a cooking utensil, can be further increased.
  • FIG 1 shows an exemplary cooking appliance designed as an induction hob with a cooking appliance device according to the invention in a schematic plan view.
  • the cooking appliance device has a hob plate with two heating zones 14 .
  • the cooking appliance device also has an operating unit 16 .
  • the operating unit 16 is used for the input and/or selection of a power level by a user.
  • the cooking appliance device has two inverters 10 in the present case.
  • the inverters 10 are arranged below the hob plate of the cooking appliance.
  • the cooking appliance device has two inductors (not shown).
  • the two inductors are arranged below the hob plate.
  • Each inductor is associated with one of the two heating zones 14 .
  • each inductor is associated with one of the two inverters 10 .
  • the hob device has a control unit 12 .
  • the control unit 12 has at least one computing unit and at least one memory unit.
  • a control program is stored in the storage unit and can be retrieved during operation of the cooking appliance device.
  • the control unit 12 is intended to operate the two inverters 10 .
  • the control unit 12 together with the inductors forms a detection unit for detecting a cooking utensil.
  • the control unit 12 can use the inductors as inductive sensors for detecting the cooking utensil.
  • each of the two inverters 10 is intended to supply one of the inductors with a high-frequency heating current, as a result of which cooking utensils placed on the cooktop plate in particular can be heated inductively.
  • a cooking appliance device is not limited to two inverters and/or two inductors, but can have any number of inverters and/or inductors.
  • a cooking appliance device according to the invention can also be provided for a matrix hob.
  • a cooking appliance device can also have an additional switching unit, which is provided to interrupt a conduction path between inverters and inductors and/or to assign multiple inverters to an inductor.
  • an operator can select a power level for each of the two heating zones 14 using the operating unit 16 .
  • the control unit 12 can set a target power P obj1 , P obj2 for the two inverters 10 on the basis of the selected value.
  • the power level selected by the operator corresponds directly to the target power P obj1 , P obj2 of the two inverters 10. If cooking utensil is now to be heated, the control unit 12 and/or the detection unit first checks whether cooking utensil suitable for inductive heating is on the Heating zones 14 of the hob plate is placed.
  • the control unit 12 and/or the detection unit determines a power-frequency curve of a given combination of inductor and cooking utensil in a known manner for different duty cycles.
  • the control unit 12 changes a frequency of a control signal of the inverters 10 step by step, starting from a maximum frequency f max to a respective minimum frequency f min1 , f min2 .
  • the results in figure 2 power-frequency curves shown.
  • the frequency of the inverters 10 is entered on an abscissa axis 22 and the output power of the inverters 10 is entered on an ordinate axis 24 .
  • the first of the two inverters 10 has a maximum output power of 2300 W.
  • the second inverter 10 has a maximum output power of 2350 W.
  • figure 3 shows exemplary power-time curves, not true to scale, for the two inverters 10.
  • a time is plotted on an abscissa axis 26 and the output power of the inverters 10 is plotted on an ordinate axis 28.
  • the control unit 12 can be provided to continuously provide an output power.
  • the control unit 12 is intended to operate the inverters 10 continuously.
  • the control unit 12 In an operating state in which the inverters 10 are to be operated simultaneously and cannot be operated continuously, the control unit 12 is intended to operate the inverters 10 together and continuously at least within a first time window T a and to split the first time window T a into one Number M of time intervals t a , t b , t c to be divided, with a number N of inverters 10 to be operated simultaneously.
  • a number of columns corresponds to the number M of time intervals t a , t b , t c .
  • the matrix A thus corresponds to an N x M matrix.
  • an M x 1 vector x is composed of a normalized time duration r j of the time intervals t a , t b , t c , with a time duration of one of the time intervals ta , t b , t c being defined in particular by a duration of the time window T a , T b is normalized.
  • an N x 1 vector b is composed of the setpoint power P obj1 , P obj2 of the inverter 10 .
  • the matrix equation or the system of equations can be solved if the number M is at least as large as the number N.
  • control unit 12 is intended to divide the first time window T a into a number M of time intervals, which is equal to a number N of inverters to be operated simultaneously, the matrix equation has no solution because it is an overdetermined system of equations (N > M).
  • control unit 12 is provided to keep a total power consumption P Ta , P Tb , P Tc of the inverters 10 constant over successive time intervals t a , t b , t c .
  • ⁇ P ij ⁇ P obji for everybody j
  • the cooking appliance device now proposes that the control unit 12 is intended to divide the first time window T a into a first number M of time intervals t a , t b , t c which is at least one greater than a second number N an inverters 10 to be operated at the same time.
  • a total power consumption P Ta , P Tb , P Tc of the inverter 10, at least in one operating state can be different over at least two consecutive time intervals ta, tb , tc , whereby in particular a maximum output power of the cooking appliance device can be increased.
  • a total power consumption P Ta , P Tb , P Tc of the inverters 10 can be constant over at least two consecutive time intervals ta, tb , tc , as a result of which equation (3) is satisfied in particular.
  • an underdetermined system of equations results when solving the matrix equation, which results in an infinite number of solutions for a division of the time intervals t a , t b , t c .
  • the control unit 12 is provided to select the time intervals t a , t b , t c in such a way that the most efficient possible operation of the cooking appliance device is made possible.
  • Such a control program and/or maximum and/or minimum durations of the time intervals t a , t b , t c and/or the time windows T a , T b are stored in the memory unit of the control unit 12c.
  • the first time window T a has a fixed duration of 1 s.
  • the three time intervals t a , t b , t c have different durations.
  • a first time interval t a has a duration of 460 ms.
  • a second time interval t b has a duration of 490 ms.
  • a third time interval t c has a duration of 50 ms.
  • the three time intervals ta , tb, tc differ in a duration of the time intervals ta , tb , tc , a frequency f1a, f1b, f1c , f2a , f2b , f2c two inverters 10 and in an output power P 1a , P 1b , P 1c , P 2a , P 2b , P 2c of the two inverters 10.
  • the first inverter 10 has a constant output power P 1a and/or a constant frequency f 1a over the entire duration of the first time interval ta. Furthermore, the first inverter 10 has an output power P 1a over the entire duration of the first time interval t a which corresponds to the maximum output power of the first inverter 10 . In the present case, the first inverter 10 thus has an output power P 1a of 2300 W over the entire duration of the first time interval t a . Furthermore, the first inverter 10 has a frequency f 1a over the entire duration of the first time interval ta, which corresponds to the minimum frequency f min1 of the first inverter 10 (cf. figure 2 ).
  • the first inverter 10 has a higher frequency f 1b in the second time interval t b than in the first time interval t a . Furthermore, the first inverter 10 has a constant output power P 1c and/or a constant frequency f 1c over the entire duration of the third time interval t c . In this case, the first inverter 10 has a lower output power P 1c in the third time interval t c than in the second time interval t b . In the present case, the first inverter 10 has an output power P 1c of 850 W over the entire duration of the third time interval t c .
  • the first inverter 10 has a higher frequency f 1c in the third time interval t c than in the second time interval t b . Furthermore, the first inverter 10 has a frequency f 1c of 58.8 kHz over the entire duration of the third time interval t c .
  • control unit 12 is provided to operate the first inverter 10 operated in the first time window T a in such a way that for the first inverter 10 an output power P ave1 averaged over the first time window T a corresponds to the setpoint power P obj1 assigned by the control unit 12 .
  • the setpoint power P obj1 requested by the control unit 12 and/or an operator is 1900 W.
  • the output power P ave1 of the first inverter 10 averaged over the first time window T a is also 1900 W.
  • the second inverter 10 has a constant output power P 2a and/or a constant frequency f 2a over the entire duration of the first time interval ta.
  • the second inverter 10 has an output power P 2a of 710 W over the entire duration of the first time interval t a .
  • the second inverter 10 has a frequency f 2a of 58.7 kHz over the entire duration of the first time interval ta.
  • the second inverter 10 has a constant output power P 2b and/or a constant frequency f 2b over the entire duration of the second time interval t b .
  • the second inverter 10 has a greater output power P 2b in the second time interval t b than in the first time interval t a .
  • the second inverter 10 has an output power P 2b of 1600 W over the entire duration of the second time interval t b .
  • the second inverter 10 has a lower frequency f 2b in the second time interval t b than in the first time interval t a .
  • the second inverter 10 has a frequency f 2b of 46.3 kHz over the entire duration of the second time interval t b .
  • the second inverter 10 has a constant output power P 2c and/or a constant frequency f 2c over the entire duration of the third time interval t c . Furthermore, the second inverter 10 has an output power P 2c over the entire duration of the third time interval t c which corresponds to the maximum output power of the first inverter 10 . In this case, the second inverter 10 has a greater output power P 2c in the third time interval t c than in the second time interval t b . In the present case, the first inverter 10 thus has an output power P 2c of 2350 W over the entire duration of the third time interval t c .
  • the second inverter 10 has a frequency f 2c over the entire duration of the third time interval t c which corresponds to the minimum frequency f min2 of the second inverter 10 (cf. figure 2 ).
  • the second inverter 10 thus has a lower frequency f 2c in the third time interval t c than in the second time interval t b .
  • the second inverter 10 has a frequency f 2c of 41.8 kHz over the entire duration of the third time interval t c .
  • the control unit 12 is provided to operate the second inverter 10 operated in the first time window T a in such a way that for the second inverter 10 an output power P ave2 averaged over the first time window T a corresponds to the setpoint power P obj2 assigned by the control unit 12 .
  • the setpoint power P obj2 requested by the control unit 12 and/or an operator is 1200 W.
  • the output power P ave2 of the second inverter 10 averaged over the first time window T a is also 1200 W.
  • control unit 12 is provided to the two inverters 10 at least in one of To operate time intervals t a , t b , t c with a frequency that differs by at least 15 kHz or the same frequency.
  • the first inverter 10 has a higher output power P 1a and/or a lower frequency f 1a than the second inverter 10 over the entire duration of the first time interval ta.
  • the first inverter 10 has a higher output power P 1b than the second inverter 10 over the entire duration of the second time interval t b .
  • the first inverter 10 has the same frequency f 1b as the second inverter 10 over the entire duration of the second time interval t b .
  • the two inverters 10 are thus operated at the same frequency over the entire duration of the second time interval t b .
  • the first inverter 10 has a lower output power P 1c and/or a higher frequency f 1c than the second inverter 10 over the entire duration of the third time interval t c .
  • the two inverters 10 are operated over the entire duration of the first time interval t a and over the entire duration of the third time interval t c at a frequency that differs by 17 kHz.
  • the output power P 1a , P 1b , P 1c of the first inverter 10 increases in successive time intervals t a , t b , t c of the first time window T a and the output power P 2a , P 2b , P 2c of the second inverter 10 falls in successive ones Time intervals t a , t b , t c of the first time window T a .
  • the total power consumption P Ta , P Tb , P Tc in one of the time intervals ta, t b , t c results from a summation of the output power P 1a , P 1b , P 1c of the first inverter 10 in one of the time intervals t a , t b , t c and the output power P 2a , P 2b , P 2c of the second inverter 10 in the same time interval t a , t b , t c .
  • the total power consumption P Ta , P Tb , P Tc of the two inverters 10 is different, at least in one operating state, at least over two consecutive time intervals t a , t b , t c and differs in particular by at least 200 W, which in particular maximum output power can be increased.
  • a total power consumption of the inverters, at least in one operating state can also be constant over at least two consecutive time intervals.
  • figure 4 12 shows exemplary power-time curves for the two inverters 10 for the first time window T a and a second time window T b
  • figure 5 shows exemplary frequency-time curves for the two inverters 10 for the first time window T a and the second time window T b
  • a time is plotted on an abscissa axis 30 and the output power of the inverters 10 is plotted on an ordinate axis 32
  • a time is plotted on an abscissa axis 34 and the frequency of the inverter 10 is plotted on an ordinate axis 36
  • the second time window T b is directly adjacent to the first time window T a .
  • the control unit 12 is provided to operate the two inverters 10 together at least in one operating state and continuously at least within the second time window Tb and to divide the second time window Tb into a third number of time intervals ta , tb , tc , which is greater by at least one than a fourth number of inverters 10 to be operated simultaneously within the time window T b .
  • the second time window T b has a fixed time duration, which is identical to the time duration of the first time window T a .
  • the second time window Tb thus has a fixed time duration of 1 s.
  • a duration of a second time window can also differ from a duration of a first time window. Provision can also be made to vary a number of time windows with a mains frequency and/or a multiple of the mains frequency, in particular twice the mains frequency.
  • the two inverters 10 are also operated simultaneously in the second time window Tb, so that the control unit 12 is intended to divide the second time window Tb into three time intervals ta, tb , tc , which in particular are at the three time intervals ta , t b , t c into which the first time window T a is divided are identical.
  • the two time windows T a , T b have the same number of time intervals ta , t b , t c with identical operating parameters, in particular frequencies and output powers, with the time intervals ta , t b , t c of the second time window T b however, are arranged in a reverse order compared to the time intervals t a , t b , t c of the first time window T a .
  • An output power P ave3 of the first inverter 10 averaged over the second time window T b corresponds to the output power P ave1 of the first inverter 10 averaged over the first time window T a .
  • an output power P ave4 of the second inverter 10 averaged over the second time window T b corresponds the output power P ave2 of the second inverter 10 averaged over the first time window T a .
  • P ave4 averaged over the second time window T b corresponds to a setpoint power P obj1 , P obj2 assigned by the control unit 12 .
  • FIG 6 shows schematically a maximum achievable power range of the two inverters 10.
  • the output power of the first inverter 10 is plotted on an abscissa axis 38 and the output power of the second inverter 10 is plotted on an ordinate axis 40.
  • the cooking device according to the invention has a larger maximum power range than a maximum power range of a cooking device from the prior art.
  • the area 18 shows a performance range which cannot be reached by a cooking appliance device of the prior art, in particular since the cooking appliance device is operated in a state in which no flicker occurs. A maximum power range of about 94% of an entire power range can be achieved.
  • the area 20 shows a power range which cannot be reached by a cooking appliance device according to the invention.
  • the maximum power range is only limited by a maximum mains voltage that can be supplied and/or a maximum current and/or by a flicker limit value of a flicker standard. Overall, in the present case, a maximum power range of about 98% of an entire power range can be achieved. The maximum achievable power range is thus increased compared to the maximum achievable power range of the prior art, since operation in a range between a state without flicker and the flicker limit value is possible.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)

Claims (8)

  1. Dispositif d'appareil de cuisson, notamment dispositif de table de cuisson, comprenant une pluralité d'onduleurs (10) qui sont ménagés pour faire respectivement fonctionner au moins un inducteur, et comprenant une unité de commande (12) qui est ménagée pour faire fonctionner au moins une partie des onduleurs (10) en commun dans au moins un état de fonctionnement et en continu au moins dans un premier créneau horaire (Ta), l'unité de commande (12) étant ménagée pour diviser le premier créneau horaire (Ta) en un premier nombre (M) d'intervalles de temps (ta, tb, tc), lequel est au moins supérieur de un à un deuxième nombre (N) d'onduleurs (10) à faire fonctionner simultanément, l'unité de commande (12) étant ménagée pour diviser le premier créneau horaire (Ta) en le premier nombre (M) d'intervalles de temps (ta, tb, tc) de manière à ce que des intervalles de temps successifs (ta, tb, tc) dans le premier créneau horaire (Ta) se distinguent au moins dans un paramètre de fonctionnement, à savoir dans une fréquence et/ou dans une densité d'impulsions et/ou dans une puissance de sortie, caractérisé en ce que l'unité de commande (12) est ménagée pour faire fonctionner au moins une partie des onduleurs (10) en commun au moins dans un état de fonctionnement et en continu au moins dans un deuxième créneau horaire (Tb) qui est différent du premier créneau horaire (Ta), dans lequel le premier créneau horaire (Ta) et le deuxième créneau horaire (Tb)se distinguent au moins dans un paramètre de fonctionnement et l'unité de commande (12) étant ménagée pour diviser le deuxième créneau horaire (Tb) en un troisième nombre d'intervalles de temps (ta, tb, tc), lequel est au moins supérieur de un à un quatrième nombre d'onduleurs (10) à faire fonctionner simultanément, l'unité de commande (12) étant ménagée pour diviser le deuxième créneau horaire (Tb) en le troisième nombre d'intervalles de temps (ta, tb, tc) de manière à ce que des intervalles de temps successifs (ta, tb, tc) dans le deuxième créneau horaire (Tb) se distinguent au moins dans un paramètre de fonctionnement, à savoir dans une fréquence et /ou dans une densité d'impulsions et/ou dans une puissance de sortie.
  2. Dispositif d'appareil de cuisson selon la revendication 1, caractérisé en ce que l'unité de commande (12) est ménagée pour faire fonctionner au moins deux des onduleurs (10) exploités pendant au moins un des intervalles de temps (ta, tb, tc) avec au moins une fréquence se distinguant d'au moins 15 kHz ou avec la même fréquence.
  3. Dispositif d'appareil de cuisson selon la revendication 1 ou 2, caractérisé en ce que l'unité de commande (12) est ménagée pour faire fonctionner les onduleurs (10) exploités dans le premier créneau horaire (Ta) de manière à ce que pour chacun des onduleurs (10) exploités, une puissance de sortie (Pave1, Pave2), dont la moyenne est calculée pendant le premier créneau horaire (Ta), corresponde au moins essentiellement à une puissance théorique (Pobj1, Pobj2) attribuée par l'unité de commande (12).
  4. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une puissance absorbée totale (PTa, PTb, PTc) des onduleurs (10) au moins dans un état de fonctionnement est au moins essentiellement constante au moins pendant deux intervalles de temps successifs (ta, tb, tc).
  5. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une puissance absorbée totale (PTa, PTb, PTc) des onduleurs (10) au moins dans un état de fonctionnement est au moins essentiellement différente au moins pendant deux intervalles de temps successifs (ta, tb, tc).
  6. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une puissance de sortie (P1a, P1b, P1c) au moins d'un premier onduleur (10) augmente au moins essentiellement pendant des intervalles de temps successifs (ta, tb, tc) du premier créneau horaire (Ta) et en ce qu'une puissance de sortie (P2a, P2b, P2c) au moins d'un deuxième onduleur (10) baisse au moins essentiellement pendant des intervalles de temps successifs (ta, tb, tc) du premier créneau horaire (Ta).
  7. Dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes, caractérisé en ce que le deuxième créneau horaire (Tb) est directement contigu au premier créneau horaire (Ta) et en ce que les deux créneaux (Ta, Tb) présentent un même nombre d'intervalles de temps (ta, tb, tc) avec des paramètres de fonctionnement identiques, les intervalles de temps (ta, tb, tc) du deuxième créneau (Tb) étant disposés en ordre inverse en comparaison avec les intervalles de temps (ta, tb, tc) du premier créneau horaire (Ta).
  8. Appareil de cuisson, notamment table de cuisson à induction, comprenant un dispositif d'appareil de cuisson selon l'une quelconque des revendications précédentes.
EP14198733.9A 2013-12-20 2014-12-18 Dispositif d'appareil de cuisson, en particulier dispositif de plaque de cuisson, doté d'une pluralité d'onduleurs Active EP2911472B2 (fr)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
ES2720746A1 (es) * 2018-01-08 2019-07-24 Bsh Electrodomesticos Espana Sa Dispositivo de campo de coccion
ES2754787A1 (es) * 2018-10-17 2020-04-20 Bsh Electrodomesticos Espana Sa Dispositivo de Aparato de cocción
KR102620662B1 (ko) * 2018-10-18 2024-01-04 삼성전자주식회사 조리 기기 및 이의 제어 방법
ES2764740A1 (es) * 2018-12-04 2020-06-04 Bsh Electrodomesticos Espana Sa Dispositivo de aparato de cocción

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Publication number Priority date Publication date Assignee Title
WO2006117182A1 (fr) † 2005-05-04 2006-11-09 E.G.O. Elektro-Gerätebau GmbH Procede et dispositif d'alimentation electrique de plusieurs bobines d'induction d'un appareil d'induction
EP1951003A1 (fr) † 2007-01-23 2008-07-30 Whirlpool Corporation Procédé de commande d'induction d'une plaque de cuisson et d'induction d'une plaque de cuisson adaptée à un tel procédé
DE102008042512A1 (de) † 2008-09-30 2010-04-01 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld und Verfahren zum Betreiben eines Kochfelds
EP1494505B1 (fr) † 2003-06-30 2010-11-24 Elatronic Ag Méthode et dispositif de régulation de puissance pour plaques à inductions
KR20110092071A (ko) † 2010-02-08 2011-08-17 엘지전자 주식회사 유도가열 조리기기
EP2528412A1 (fr) † 2010-01-20 2012-11-28 Panasonic Corporation Appareil de chauffage par induction
EP2846607A1 (fr) † 2013-09-05 2015-03-11 Electrolux Appliances Aktiebolag Table de cuisson par induction comprenant une zone de cuisson avec trois ou plusieurs bobines d'induction et procédé permettant de commander une zone de cuisson

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TWI394547B (zh) * 2009-03-18 2013-05-01 Delta Electronics Inc 加熱裝置
EP2506665B1 (fr) * 2011-03-28 2017-05-24 BSH Hausgeräte GmbH Dispositif d'appareil de cuisson
ES2632582T3 (es) * 2011-03-28 2017-09-14 BSH Hausgeräte GmbH Dispositivo de aparato de cocción
ES2798178T3 (es) * 2011-03-28 2020-12-09 Bsh Hausgeraete Gmbh Dispositivo de aparato de cocción

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1494505B1 (fr) † 2003-06-30 2010-11-24 Elatronic Ag Méthode et dispositif de régulation de puissance pour plaques à inductions
WO2006117182A1 (fr) † 2005-05-04 2006-11-09 E.G.O. Elektro-Gerätebau GmbH Procede et dispositif d'alimentation electrique de plusieurs bobines d'induction d'un appareil d'induction
EP1951003A1 (fr) † 2007-01-23 2008-07-30 Whirlpool Corporation Procédé de commande d'induction d'une plaque de cuisson et d'induction d'une plaque de cuisson adaptée à un tel procédé
DE102008042512A1 (de) † 2008-09-30 2010-04-01 BSH Bosch und Siemens Hausgeräte GmbH Kochfeld und Verfahren zum Betreiben eines Kochfelds
EP2528412A1 (fr) † 2010-01-20 2012-11-28 Panasonic Corporation Appareil de chauffage par induction
KR20110092071A (ko) † 2010-02-08 2011-08-17 엘지전자 주식회사 유도가열 조리기기
EP2846607A1 (fr) † 2013-09-05 2015-03-11 Electrolux Appliances Aktiebolag Table de cuisson par induction comprenant une zone de cuisson avec trois ou plusieurs bobines d'induction et procédé permettant de commander une zone de cuisson
EP3024300A1 (fr) † 2013-09-05 2016-05-25 Electrolux Appliances Aktiebolag Table de cuisson par induction comprenant une zone de cuisson avec trois ou plusieurs bobines d'induction et procédé permettant de commander une zone de cuisson

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EP2911472A2 (fr) 2015-08-26
EP2911472B1 (fr) 2020-03-11

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