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EP4074142B1 - Dispositif à induction - Google Patents

Dispositif à induction

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Publication number
EP4074142B1
EP4074142B1 EP20816174.5A EP20816174A EP4074142B1 EP 4074142 B1 EP4074142 B1 EP 4074142B1 EP 20816174 A EP20816174 A EP 20816174A EP 4074142 B1 EP4074142 B1 EP 4074142B1
Authority
EP
European Patent Office
Prior art keywords
induction
control
phase shift
control unit
alternating current
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.)
Active
Application number
EP20816174.5A
Other languages
German (de)
English (en)
Other versions
EP4074142A1 (fr
Inventor
Tomas Cabeza Gozalo
Alberto Dominguez Vicente
Jorge ESPAÑOL LEZA
Manuel Fernandez Martinez
Sergio Llorente Gil
Ramon Peinado Adiego
Jorge VILLA LOPEZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4074142A1 publication Critical patent/EP4074142A1/fr
Application granted granted Critical
Publication of EP4074142B1 publication Critical patent/EP4074142B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1236—Cooking devices induction cooking plates or the like and devices to be used in combination with them adapted to induce current in a coil to supply power to a device and electrical heating devices powered in this way
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like

Definitions

  • the invention relates to an induction device according to the preamble of claim 1 and a method for operating an induction device according to the preamble of claim 11.
  • An induction cooking appliance device with at least one control and/or regulating unit is already known from the prior art, which is provided to repetitively control and supply with energy at least one induction target in at least one periodic continuous heating operating state, to which at least one operating period is assigned, and to operate the induction target in at least one switch-on interval of the operating period with a heating power, in particular a target heating power or a power surplus compared to a target heating power, wherein the control and/or regulating unit is provided to vary a heating current frequency for the induction target in the switch-on interval of the operating period in the continuous heating operating state in order to thus enable low-noise operation.
  • EP 3 484 242 A1 An induction cooking device with at least two induction heating elements and with at least one control unit is described, which in at least one operating state operates the induction heating elements in at least a first time interval with a phase shift.
  • a cooking appliance device is described with at least two inverters, which are each provided to operate at least one inductor, and with a control unit which is provided to operate the at least two inverters jointly in at least one time window of a continuous operating state and to divide the at least one time window into at least two time intervals.
  • the prior art already discloses an induction cooking appliance device with at least two induction heating elements and with at least one control unit, which in at least one operating state controls the induction heating elements in at least one first time interval with a first phase shift and in at least one second time interval different from the first time interval with a phase shift different from the first different second phase shift, in order to enable improved heat distribution.
  • the object of the invention is, in particular but not limited to, to provide a generic device with improved properties regarding safe and/or convenient operation. This object is achieved according to the invention by the features of claims 1 and 11, while advantageous embodiments and further developments of the invention can be found in the subclaims.
  • the invention is based on an induction device, in particular an induction cooking device, with a plurality of independently controllable induction targets and with at least one control unit which is provided to repeatedly control the induction targets with at least one alternating current frequency and to supply them with energy within a control period consisting of a first control interval and at least one second control interval.
  • control unit operates at least two of the induction targets with a first phase shift in the first control interval in order to minimize interference.
  • the inventive design makes it possible to provide a generic cooking appliance with improved properties regarding safe and/or comfortable operation, in particular low-noise operation and/or in particular with regard to compliance with EMC standards and/or flicker conformity.
  • noise resulting from intermodulation can advantageously be minimized.
  • This makes it possible, in particular, to avoid adverse acoustic exposure to an operator, thereby achieving a high level of operating comfort and, in particular, a positive operating impression for the operator, particularly with regard to acoustic quality.
  • an induction device with improved conformity to legal guidelines, in particular guidelines regarding EMC conformity and/or flicker conformity can advantageously be achieved using simple technical means.
  • an “induction device” is understood to mean, in particular, at least one part, in particular a subassembly, of an induction device, which has a primary function in the form of energy transmission to at least one external unit.
  • the induction device could, for example, be designed as a part and/or a subassembly of an induction charger, wherein the external unit could have at least one receiving element, for example, a secondary coil, and could, for example, be designed as a handheld power tool, such as a drill and/or an electric screwdriver and/or a hammer drill and/or a saw, or as a mobile device such as a smartphone and/or tablet and/or laptop.
  • the induction device could be designed as part of a transformer and, in particular, comprise at least one primary coil of a transformer.
  • the induction device is preferably designed as an induction cooking device, for example, as an induction oven or an induction grill, and particularly preferably as an induction hob, and is provided for heating the external unit, which can, in particular, be designed as a cooking utensil.
  • an “induction target” is to be understood as an inductor or a plurality of inductors, which is/are part of the induction device and which can be jointly controlled by the control unit.
  • An “inductor” is to be understood here in particular as an element that has at least one induction coil and is intended to supply energy, in particular in the form of an alternating magnetic field, to at least one receiving element, in particular a receiving element of the external unit, in at least one operating state.
  • an induction target can be intended in particular to supply energy to the receiving element for the purpose of heating.
  • the external unit could, for example, be designed as a cooking utensil and have at least one secondary coil as a receiving element for receiving the energy provided by the inductor.
  • the receiving element could also be designed as a metallic heating means, in particular as an at least partially ferromagnetic heating means, for example as a ferromagnetic base of a cooking utensil, in which, in the operating state, eddy currents and/or remagnetization effects are caused by the inductor, which in Heat can be converted.
  • the plurality of inductors can be arranged in a matrix, whereby the matrix-like inductors can form a variable cooking surface.
  • Each of the induction targets is assigned, in particular, at least one inverter unit, which can be designed, in particular, as a resonant inverter and/or as a dual half-bridge inverter.
  • the inverter unit comprises, in particular, at least two switching elements that can be individually controlled by the control unit.
  • a "switching element" is to be understood, in particular, as an element that is intended to establish and/or break an electrically conductive connection between two points, in particular contacts of the switching element.
  • the switching element has at least one control contact via which it can be switched.
  • the switching element is designed as a semiconductor switching element, in particular as a transistor, for example, as a metal-oxide-semiconductor field-effect transistor (MOSFET) or organic field-effect transistor (OFET), advantageously as a bipolar transistor with a preferably insulated gate electrode (IGBT).
  • MOSFET metal-oxide-semiconductor field-effect transistor
  • OFET organic field-effect transistor
  • the switching element is designed as a mechanical and/or electromechanical switching element, in particular as a relay.
  • a “control unit” is understood to mean, in particular, an electronic unit that is at least partially integrated into the induction device and is intended, in particular, to control at least one of the inverter units.
  • the control unit preferably comprises a computing unit and, in particular, in addition to the computing unit, a memory unit with at least one control program stored therein, which is intended to be executed by the computing unit.
  • a “control period” is understood to mean, in particular, a period of time in which the control unit repetitively controls the induction targets using at least one control strategy.
  • a “control strategy” is understood to mean, in particular, a specific control of a unit, in particular of at least two induction targets, and/or a specific method and/or a specific algorithm that is applied to the unit, in particular to the induction targets.
  • the control strategy can, in particular, comprise at least one phase shift.
  • a "control interval” is understood to mean, in particular, a partial period of the control period in which the control unit controls the induction targets using precisely one specific control strategy and maintains this control strategy during this partial period.
  • a control interval in particular, a number of simultaneously transmitted by the control unit operated induction targets remain constant.
  • the terms "first”, “second”, and “further” are to be understood purely as a designation to better distinguish the respective control intervals and do not imply any temporal order and/or ranking of the respective control intervals.
  • the first control interval can be subordinate to the second control interval and/or further control intervals, or vice versa.
  • the first control interval can be longer or shorter than the second control interval and/or further control intervals, or all control intervals can each last the same length of time.
  • Interference can also, alternatively or additionally, be caused by the occurrence of a ripple current, i.e., an alternating current of any frequency and waveform, which is superimposed on a direct current and manifests itself in an undesirable hum.
  • a ripple current i.e., an alternating current of any frequency and waveform
  • Interference in this context does not include, in particular, technical malfunctions, defects, and/or other undesirable phenomena, such as uneven heat distribution.
  • phase shift should be understood in particular as meaning that an oscillation of a control signal of a first inverter unit, with which a first induction target is controlled, and an oscillation of a further control signal a further inverter unit, with which a further induction target is controlled, have spaced-apart zero crossings.
  • the phase shift assumes an amount that corresponds to the distance between the zero crossings and is specified as a phase angle. The amount of the phase shift will be considered below based on the control signal by which the control unit first controls and supplies energy to a specific induction target in the respective control interval.
  • control unit operate at least one additional induction target with a further first phase shift in the first control interval.
  • control unit it would be conceivable for the control unit to operate three induction targets simultaneously in the first control interval, namely a second induction target with the first phase shift relative to a first induction target and a further induction target with the further first phase shift relative to the first induction target. This advantageously minimizes interference in different operating situations, for example, when a different number of induction targets are to be operated simultaneously.
  • control unit operate at least one further induction target with a further second phase shift in the second control interval.
  • control unit it would be conceivable for the control unit to operate exactly two induction targets simultaneously with the first phase shift in the first control interval and three induction targets simultaneously in the second control interval, namely a second induction target with the second phase shift relative to a first induction target and a further induction target with the further second phase shift relative to the first induction target. This advantageously minimizes interference in different operating situations, for example, when a different number of induction targets are operated simultaneously.
  • the duration of at least one of the control intervals, in particular of all control intervals be shorter than half a period of an AC mains voltage. This advantageously allows the control unit to react, particularly very quickly and automatically, to a changed operating situation, for example, the switching on and/or off of individual induction targets by a user, while simultaneously minimizing interference. Furthermore, it is proposed that the duration of the control period be shorter than half a period of an AC mains voltage. This advantageously allows flicker compliance to be improved.
  • the alternating current frequency and the further alternating current frequency can be spaced apart by a certain amount, in particular by an amount of at least 20 kHz, without the alternating current frequency and the further alternating current frequency having a common integer multiple.
  • the further alternating current frequency be an integer multiple of the alternating current frequency.
  • the alternating current frequency at which the first two induction targets are operated could be 35 kHz and the further alternating current frequency at which a further induction target is operated could be 70 kHz. This can advantageously minimize interference, in particular in cases in which at least two induction targets of the induction device have to be operated at different alternating current frequencies for technical reasons, e.g. due to differing output powers.
  • control unit operates at least two of the induction targets, in particular the at least two induction targets, with the same alternating current frequency in at least one of the control intervals, in particular the first control interval.
  • the same alternating current frequency With the same alternating current frequency, a phase shift with in particular using simple technical means and at the same time minimising interference.
  • the solution according to the invention comprises that the control unit calculates a phase angle of the first phase shift from a quotient of 180° and a number of induction targets to be operated simultaneously within the first control interval.
  • the control unit calculates all phase angles of all phase shifts from 180° and a number of induction targets to be operated simultaneously within the first control interval.
  • the control unit in particular comprises a computing unit.
  • two induction targets could be operated simultaneously in one of the control intervals, so that the computing unit of the control unit calculates the phase angle from 180° divided by two to be 90°.
  • interference which can vary greatly depending on the number of induction targets operated simultaneously within a control interval, can advantageously be minimized by the control unit, in particular automatically.
  • control unit selects at least one suitable phase angle for the first phase shift from a catalog of suitable phase angles based on a number of induction targets to be operated simultaneously within the first control interval.
  • control unit selects at least one suitable phase angle for the respective phase shift from a catalog of suitable phase angles based on a number of induction targets to be operated simultaneously within a respective control interval.
  • the control unit comprises, in particular, at least one memory unit in which the catalog is stored so that it can be retrieved by the control unit.
  • the catalog can, in particular, contain a plurality of suitable phase angles, in particular those determined experimentally through tests.
  • phase angles contained in the catalog are adapted to a specific application of the induction device, for example, a specific operating mode.
  • a first catalog of a first induction device which is part of a first induction device
  • a second catalog of a second induction device which is part of a second induction device that differs from the first, particularly with regard to a field of application.
  • the catalog can be expanded and/or adapted with additional suitable phase angles, so that new empirical findings regarding suitable phase angles can be added, for example, through a software update.
  • At least two of the induction targets be operated with a phase shift. This advantageously allows for particularly quiet operation of the induction device.
  • the induction device is not intended to be limited to the application and embodiment described above.
  • the induction device may have a number of individual elements, components, and units that differs from the number stated herein to fulfill a functionality described herein.
  • FIG 1 shows an induction appliance 100a with an induction device 10a.
  • the induction appliance 100a is designed as an induction cooking appliance, specifically as an induction hob.
  • the induction device 10a is designed as an induction cooking appliance.
  • the induction device 10a has a plurality of induction targets 12a, 14a, 16a, 18a.
  • the induction device 10a has a control unit 20a.
  • the induction targets 12a, 14a, 16a, 18a can be controlled independently by the control unit 20a.
  • the control unit 20a is provided to control the induction targets 12a, 14a, 16a, 18a within a control period 22a (cf. Figure 4 ) repetitively with at least one alternating current frequency 24a and to supply it with energy.
  • the control unit 20a has a computing unit 92a and a memory unit 94a.
  • FIG. 2 shows a circuit diagram of the induction device 10a in a schematic representation.
  • Each of the induction targets 12a is assigned an inverter unit 38a.
  • Each of the inverter units 38a has a first switching element 40a and a second switching element 42a.
  • the first switching element 40a and the second switching element 42a are each designed as transistors, specifically as bipolar transistors with an insulated gate electrode.
  • the control unit 20a repetitively controls the respective induction targets 12a, 14a, 16a, 18a via the inverter units 38a assigned to the respective induction targets 12a, 14a, 16a, 18a at the alternating current frequency 24a.
  • the control period 22a consists of several control intervals 26a, 28a, 30a.
  • the duration of all control intervals 26a, 28a, and 30a together results in the duration of the control period 22a (cf. Figure 4 ). Consequently, the duration of all control intervals 26a, 28a, 30a is shorter than half the period 86a of the AC mains voltage 72a.
  • a power provided by the induction target 12a of the induction targets 12a, 14a, 16a, 18a is plotted on an ordinate axis 48a of the second diagram.
  • a time is plotted on an abscissa axis 54a of a third diagram.
  • a power provided by the induction target 14a is plotted on an ordinate axis 52a of the third diagram.
  • a time is plotted on an abscissa axis 58a of a fourth diagram.
  • a power provided by the induction target 16a is plotted on an ordinate axis 56a of the fourth diagram.
  • a time is plotted on an abscissa axis 62a of a fifth diagram.
  • the control unit 20a operates the induction target 14a, the induction target 16a, and the induction target 18a simultaneously, each at the same AC frequency 24a.
  • the control unit 20a operates the induction target 16a with a second phase shift 34a relative to the induction target 14a and the induction target 18a with the second phase shift 34a relative to the induction target 14a.
  • the second phase shift 34a differs from the first phase shift 32a.
  • Figure 5 shows a schematic representation of a method for operating the induction device 10a with a plurality of independently controllable induction targets 12a, 14a, 16a, 18a.
  • the control unit 20a determines a number of induction targets 12a, 14a, 16a, 18a to be operated simultaneously within the first control interval 26a.
  • a second method step 104a at least two of the induction targets 12a, 14a, 16a, 18a are repetitively controlled with the alternating current frequency 18a within the control period 22a and supplied with energy. To minimize interference, two of the induction targets 12a, 14a, 16a, 18a are operated with the first phase shift 32a in the first control interval 26a.
  • the Figure 6 relates to an embodiment of an induction device 10b not according to the invention.
  • the induction device 10b is designed identically to the induction device 10a in terms of its structural design and differs only in terms of programming of a control unit 20b.
  • Figure 6 shows a synopsis of several diagrams illustrating a control period 22b of the control unit 20b in an exemplary operating state.
  • the control period 22b comprises a first control interval 26b, a second control interval 28b, and two further control intervals 30b.
  • a time is plotted on an abscissa axis 46b of a first diagram.
  • a total power inductively provided by the induction targets 12b, 14b, 16b, 18b is plotted on an ordinate axis 44b of the first diagram.
  • a time is plotted on an abscissa axis 50b of a second diagram.
  • a power provided by the induction target 12b is plotted on an ordinate axis 48b of the second diagram.
  • a time is plotted on an abscissa axis 54b of a third diagram.
  • a power provided by the induction target 14b is plotted on an ordinate axis 52b of the third diagram.
  • a time is plotted on an abscissa axis 58b of a fourth diagram.
  • a power provided by the third induction target 16b is plotted on an ordinate axis 56b of the fourth diagram.
  • a time is plotted on an abscissa axis 62b of a fifth diagram.
  • the control unit 20b operates the induction target 14b and the induction target 16b with a first phase shift 32b. From a catalog stored in a memory unit 94b of the control unit 20b, the control unit 20b determines a suitable phase angle 36b for the first phase shift 32b from a number of induction targets 12b, 14b, 16b, 18b to be operated simultaneously in the first control interval 26b.
  • the control unit 20b operates the further induction target 18b with a further first phase shift 96b.
  • the control unit 20b operates the induction target 14b, the induction target 16b, and the induction target 18b, each at the same AC frequency 24b.
  • the control unit 20b operates the induction target 14b and the induction target 16b with a second phase shift 34b.
  • the second phase shift 34b is different from the first phase shift 32b.
  • the control unit 20b operates the further induction target 18b with a further second phase shift 98b relative to the induction target 14b.
  • FIG. 7 shows a circuit diagram of an alternative induction device 10c in a schematic representation.
  • the induction device 10c has four induction targets 12c, 14c, 16c, 18c. Each of the induction targets is supplied with electrical energy in a matrix multi-inverter topology.
  • Each of the induction targets 12c, 14c, 16c, 18c has five inductors 106c.
  • Each of the induction targets 12c, 14c, 16c, 18c is assigned an inverter unit 38ac.
  • Each of the inverter units 38c has a first switching element 40c and five second switching elements 42c.
  • Each of the switching elements 40a, 42c is designed as a transistor, specifically as an insulated-gate bipolar transistor. By means of the switching elements 42c, a separate control of the individual inductors 106c of the respective induction targets 12c, 14c, 16c, 18c is possible.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Induction Heating Cooking Devices (AREA)

Claims (11)

  1. Dispositif à induction (10a, 10c), en particulier dispositif pour appareil de cuisson à induction, comprenant une pluralité de cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) pouvant être commandées indépendamment et au moins une unité de commande (20a), qui est conçue pour commander, avec au moins une fréquence de courant alternatif (24a), et alimenter en énergie les cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) au cours d'une période de commande (22a) composée d'un premier intervalle de commande (26a) et d'au moins un deuxième intervalle de commande (28a) de manière répétée,
    dans lequel les cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) sont configurées sous forme d'inducteurs distincts ou sous forme d'une pluralité d'inducteurs (106c), qui peuvent être commandés en commun par l'unité de commande (10a),
    dans lequel l'unité de commande (20a) active, pour minimiser les effets perturbateurs, au moins deux des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) dans le premier intervalle de commande (26a) avec un premier décalage de phase (32a), caractérisé en ce que l'unité de commande (20a) calcule un angle de phase (36a) du premier décalage de phase (32a) à partir d'un quotient entre 180° et un nombre d'inducteurs à activer (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) simultanément dans le premier intervalle de commande (26a).
  2. Dispositif à induction (10a, 10c) selon la revendication 1, caractérisé en ce que l'unité de commande (20a) active les au moins deux cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) dans le deuxième intervalle de commande (28a) avec un deuxième décalage de phase (34a) différent du premier décalage de phase (32a).
  3. Dispositif à induction (10a, 10b, 10c) selon la revendication 1 ou 2, caractérisé en ce que l'unité de commande (20a, 20b) active dans le premier intervalle de commande (26a, 26b) au moins une autre des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) avec un autre premier décalage de phase.
  4. Dispositif à induction (10a, 10c) selon l'une des revendications précédentes, caractérisé en ce que l'unité de commande (20a) active dans le deuxième intervalle de commande (28a, 28b) au moins une autre des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) avec un autre deuxième décalage de phase.
  5. Dispositif à induction (10a, 10c) selon l'une des revendications précédentes, caractérisé en ce qu'une durée d'au moins un des intervalles de commande (26a, 28a, 30a), en particulier de tous les intervalles de commande (26a, 28a, 30a), est respectivement plus courte qu'une demi-période (86a) d'une tension alternative de réseau (72a).
  6. Dispositif à induction (10a, 10c) selon l'une des revendications précédentes, caractérisé en ce qu'une durée (88a) de la période de commande (22a) est plus courte qu'une demi-période (86a) d'une tension alternative de réseau (72a).
  7. Dispositif à induction (10a, 10c) selon l'une des revendications précédentes, caractérisé en ce que l'unité de commande (20a) active, dans au moins un des intervalles de commande (26a, 28a, 30a), au moins une des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) avec la fréquence de courant alternatif (24a) et au moins une autre des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) avec une autre fréquence de courant alternatif différente de la fréquence de courant alternatif (24a).
  8. Dispositif à induction (10a, 10c) selon la revendication 7, caractérisé en ce que l'autre fréquence de courant alternatif est un multiple entier de la fréquence de courant alternatif (24a).
  9. Dispositif à induction (10a, 10c) selon l'une des revendications 1 à 6, caractérisé en ce que l'unité de commande active, dans au moins un des intervalles de commande (26a, 28a, 30a), en particulier le premier intervalle de commande (26a), au moins deux des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c), en particulier les au moins deux cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) avec la même fréquence de courant alternatif (24a).
  10. Appareil de cuisson à induction (100a), en particulier table de cuisson à induction, comprenant un dispositif à induction (10a, 10c) selon l'une des revendications précédentes.
  11. Procédé de fonctionnement d'un dispositif à induction (10a, 10c), en particulier d'un dispositif pour appareil de cuisson à induction, en particulier selon l'une des revendications 1 à 9, comprenant une pluralité de cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) pouvant être commandées indépendamment, qui sont configurées sous forme d'inducteur ou d'une pluralité d'inducteurs,
    dans lequel les cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) sont commandées, avec au moins une fréquence de courant alternatif (24a), et alimentées en énergie au cours d'une période de commande (22a) composée d'au moins deux intervalles de commande (26a, 28a, 30a) successifs de manière répétée,
    dans lequel au moins deux des cibles d'induction (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) sont activées avec un décalage de phase (32a), pour minimiser les effets perturbateurs, dans au moins un des intervalles de commande (26a, 28a, 30a), caractérisé en ce qu'un angle de phase (36a) du premier décalage de phase (32a) est calculé à partir d'un quotient entre 180° et un nombre d'inducteurs à activer (12a, 14a, 16a, 18a, 12c, 14c, 16c, 18c) simultanément dans le premier intervalle de commande (26a).
EP20816174.5A 2019-12-13 2020-12-02 Dispositif à induction Active EP4074142B1 (fr)

Applications Claiming Priority (2)

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PCT/EP2020/084249 WO2021115871A1 (fr) 2019-12-13 2020-12-02 Dispositif à induction

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ES2378607B1 (es) * 2009-11-05 2013-03-14 BSH Electrodomésticos España S.A. Campo de cocción con al menos dos inductores de calentamiento.
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
ES2716422A1 (es) * 2017-11-08 2019-06-12 Bsh Electrodomesticos Espana Sa Dispositivo de aparato de cocción por inducción.
ES2729738A1 (es) * 2018-05-04 2019-11-05 Bsh Electrodomesticos Espana Sa Dispositivo de inducción

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WO2021115871A1 (fr) 2021-06-17
US20230009984A1 (en) 2023-01-12

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