EP4098078A1

EP4098078A1 - Induction cooking device

Info

Publication number: EP4098078A1
Application number: EP21700212.0A
Authority: EP
Inventors: Arturo Acevedo Simon; Sandra Aranda Vazquez; Nicolas Blasco Rueda; Carlos CALVO MESTRE; Cristina Diez Esteban; Jose Miguel Gil Narvion; Diego Puyal Puente; Francisco Villuendas Lopez
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2020-01-31
Filing date: 2021-01-13
Publication date: 2022-12-07
Also published as: WO2021151661A1; US20230049426A1

Abstract

The invention relates to an induction cooking device (10a-d), in particular an induction hob device, comprising at least one independent heating unit (12a-d) having an inductor (14a-d), and comprising a power supply unit (16a-d) for providing an alternating current for the heating unit (12a-d). According to the invention, in order to provide a generic device with improved properties in terms of flexibility and/or efficiency, the power supply unit (16a-d) has a configuration unit (18a-d), which is provided for a change of configuration of the power supply unit (16a-d) between a half-bridge topology and a full-bridge topology in order to supply the entire heating unit (12a-d).

Description

Induction cooking device

The invention relates to an induction cooking device according to the preamble of claim 1 and a method for operating an induction cooking device according to the preamble of claim 16.

From US 6,528,770 B1 an induction hob with a first heating unit with a first inductor and an additional first inductor, a second Heizein unit with a second inductor and a power supply unit with two inverters for supplying the heating units is known. In a half-bridge topology, the first heating unit with the first inductor and the second heating unit with the second inductor can each be supplied separately via one of the inverters. To provide a higher heating power, the first heating unit with the first inductor and with the additional first inductor in a full bridge configuration can be operated simultaneously with the inverter, while the second heating unit cannot be operated simultaneously. The second heating unit cannot be operated in a full bridge topology. The entire first heating unit with the first inductor and the additional first inductor cannot be operated in a half-bridge topology.

The object of the invention is in particular, but not limited to, to provide a generic device with improved properties in terms of flexibility and / or efficiency. The object is achieved according to the invention by the features of claims 1 and 16, while advantageous configurations and developments of the invention can be found in the subclaims.

The invention is based on an induction cooking device, in particular an induction hob device, with at least one independent heating unit, comprising at least one inductor, and with a power supply unit for providing an alternating current for the heating unit.

It is proposed that the power supply unit has a configuration unit which is provided for a configuration change of the power supply unit between a half-bridge topology and a full-bridge topology for supplying the entire heating unit. Such a configuration can in particular provide an induction cooking device with improved properties in terms of flexibility and / or efficiency. In particular, the configuration unit can advantageously operate the entire heating unit both in a half-bridge topology to provide low to medium heating outputs and in a full-bridge topology to provide high to very high heating outputs. In addition, additional heating units can advantageously also be operated in a half-bridge topology or in a full-bridge topology. In this way, a high degree of flexibility can be provided for a user. In addition, an especially efficient operation of an induction cooking appliance at low to medium heating outputs can advantageously be achieved, while there is also the possibility of operation in a boost operating mode at high to very high heating outputs. In addition, there is advantageously the option of changing a resonance capacitance of the power supply unit, as a result of which switching frequencies close to the resonance frequency can be achieved in different operating situations and thus reactive power losses can be minimized.

By switching off individual resonance capacitors, efficiency in a half-bridge topology can advantageously be further improved. By optionally connecting further resonance capacitors, efficiency in a full bridge topology can advantageously be increased. The induction cooking appliance device can advantageously be operated both in the full bridge topology and in the half bridge topology, in each case in a ZVS mode, whereby switching losses in particular can advantageously be reduced and, in particular, energy efficiency can be further improved. Furthermore, costs can advantageously be reduced and / or a particularly compact design can be achieved in that two single-pole changeover switches of the configuration unit can be replaced to form a two-pole changeover switch.

An “induction cooking device”, in particular an “induction cooking field device”, is to be understood as meaning in particular at least one part, in particular a sub-assembly, of an induction cooking device, in particular an induction hob. The induction cooking appliance could, for example, be designed as an induction grill and / or as an induction oven and / or as a combination appliance with an additional microwave function. The induction cooking appliance is preferably designed as an induction hob. It is particularly conceivable that the induction hob is designed as a matrix induction hob. In particular, the induction cooking device, in particular in particular the induction hob device, including the entire induction cooking device, in particular the entire induction hob.

A “heating unit” is to be understood in particular as a unit which in particular can have a plurality of inductors and which is provided to supply energy, in particular in the form of an alternating magnetic field, to at least one receiving element. For this purpose, the heating unit has at least one inductor. The heating unit can in particular have precisely one inductor. Alternatively, it is conceivable that the heating unit has a plurality of inductors which, in particular, are arranged in a matrix-like manner and / or in particular can be controlled individually and / or jointly. An “independent” heating unit is to be understood in particular as a heating unit which can be operated independently of other heating units, in particular independently of one and / or more further heating unit (s). In particular, a heating power provided by the heating unit can be set independently of a heating power provided by other heating units. An “entire heating unit” should be understood to mean, in particular, all inductors that are assigned to the heating unit.

An “inductor” is to be understood here in particular as an element which has at least one induction coil and / or is designed as an induction coil and which is provided to supply energy, in particular in the form of an alternating magnetic field, to at least one receiving element in at least one operating state . The receiving element is designed in particular as a part and / or a subassembly of a receiving unit and is provided in particular to receive the energy provided by the heating unit, in particular by the at least one inductor of the heating unit. The receiving unit can in particular be part of the induction cooking device. Alternatively, it is conceivable that the receiving unit is designed as a unit that is independent of the induction cooking device and / or as part of a further device that is independent of the induction cooking device. The receiving unit can in particular be provided to be set up in an area above the heating unit and / or another heating unit. The receiving unit could be designed, for example, as a cookware and in particular at least one secondary coil as a receiving element for receiving the information loaded by the inductor of the heating unit and / or a further inductor of the further heating unit. have mounted energy. Alternatively or additionally, 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 cooking utensils, in which eddy currents and / or magnetic reversal effects are caused by the inductor in an operating state of the heating unit, which are converted into heat.

A “power supply unit” is to be understood as meaning, in particular, a unit which, in at least one operating state, provides a particularly high-frequency alternating current for the at least one heating unit, in particular for the inductor of the heating unit. The power supply unit comprises at least one inverter. The inverter comprises at least two inverter switching elements. An inverter switching element has at least one control contact via which it can be controlled, in particular by a control unit. In particular, the inverter switching element is designed as a semiconductor switching element, in particular as a transistor, advantageously as a bipolar transistor with a preferably insulated gate electrode (IGBT). Alternatively, the inverter switching element can be designed as a mechanical and / or electromechanical switching element, in particular as a relay. For example, the switching element can be designed as an FET, as a MOSFET, preferably as an RC-IGBT and particularly preferably as a HEMT transistor.

A “configuration unit” is to be understood in particular as a unit of the power supply unit which has at least one configuration element with at least one electrical pole and at least two electrical contacts. Via the configuration element of the configuration unit, in particular a first configuration of the power supply unit can be made by establishing a first electrically conductive connection via a first electrical contact of the two electrical contacts and a further configuration of the power supply unit by establishing a further electrically conductive connection via a second electrical contact of the two electrical contacts can be achieved. The configuration unit advantageously has a plurality of configuration elements, which in particular are designed to be controllable independently of one another. In particular, it is also conceivable that at least two of the configuration elements are formed by a common switch, for example a two-pole changeover switch, and can be controlled jointly and simultaneously. The con- The configuration unit can in particular be designed at least partially in one piece with the power supply unit. In this context, “at least partially formed in one piece” is to be understood in particular to mean that the configuration unit and the power supply unit are electrically conductively connected to one another in at least one operating state and in particular form at least one common circuit.

A “half-bridge topology” is to be understood in particular as a topology of the power supply unit in which the heating unit can be supplied with an alternating current via exactly one inverter made up of two inverter switching elements.

In the half-bridge topology of the power supply unit, provision of low to medium heating capacities is provided by the heating unit in particular. A “full bridge topology” is to be understood as meaning, in particular, a topology of the power supply unit in which the heating unit can be supplied with an alternating current via exactly two inverters connected electrically in parallel, each with two inverter switching elements. In the full bridge topology of the power supply unit, provision of high to very high heating powers is provided by the heating unit in particular.

“Provided” is to be understood in particular as specifically programmed, designed and / or equipped. The fact that an object is provided for a specific function is to be understood in particular to mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

It is further proposed that the induction cooking appliance device has an independent further heating unit, comprising at least one further inductor, which can be supplied by the power supply unit at the same time as the heating unit. In particular, this can increase flexibility for a user. In particular, both the heating unit and the further heating unit can advantageously each be operated in a half-bridge topology and in each case in a full-bridge topology.

It is also proposed that the heating unit and the further heating unit can be operated simultaneously in a half-bridge topology by the configuration unit. In particular, the entire heating unit and the entire further heating unit by the Configuration unit can be operated simultaneously in a half-bridge topology. Flexibility for a user can thereby advantageously be increased. In particular, the heating unit and the further heating unit can also advantageously be operated particularly efficiently at the same time.

In addition, it is proposed that the power supply unit have a supply sub-unit which comprises at least one inverter and at least one resonance capacitor unit for supplying the heating unit, and a further supply unit which comprises at least one further inverter and at least one further resonance capacitor unit for supplying the further heating unit . A “supply subunit” is to be understood as meaning, in particular, a subunit of the power supply unit which provides at least one circuit for an independent supply of at least one heating unit. A “resonance capacitor unit” is to be understood as meaning, in particular, a unit of the supply subunit which has at least one resonance capacitor. The at least one resonance capacitor of the resonance capacitor unit forms, in at least one operating state of the induction cooking device, a resonant circuit with an inverter switching element of the inverter of the supply subunit and at least one inductor of at least one heating unit, which is supplied with an alternating current by the supply subunit.

It is also proposed that the supply subunit and the further supply subunit are electrically connected in series via at least one switching element of the configuration unit. In this way, a particularly simple configuration change of the power supply unit can advantageously be made possible. Furthermore, a particularly high level of operating convenience can be provided for a user in this way.

It is also proposed that the supply subunit and the further supply subunit are electrically cyclically connected in series via at least one further switching element of the configuration unit. In this context, “cyclically” should in particular be understood to mean that the supply subunit and the further supply subunit can be alternately connected in series via the switching element and via the further switching element. A configuration change can advantageously be further simplified in this way. In particular, a quick configuration change from a configuration for supplying the heating unit in a full bridge topology to a ner further configuration for supplying the further subunit in a full bridge configuration.

It is also proposed that the supply subunit and the further supply subunit are designed to be identical to one another. In this way, a manufacturing process can advantageously be simplified. In addition, production costs can advantageously be reduced, in particular due to economies of scale. In this way, a particularly inexpensive induction cooking appliance device with advantageous properties in terms of flexibility and / or efficiency can also advantageously be provided.

It is also proposed that the induction cooking device has a control unit which operates the power supply unit in a ZVS mode. A “ZVS mode” is to be understood in particular as an operating mode in which the control unit operates the power supply unit, in particular at least one inverter of the power supply unit, with at least one essentially voltage-free switching process, which is known as “zero voltage switching (ZVS ) "Is known, operates. An “at least essentially voltage-free switching process” is to be understood as meaning, in particular, a switching process in which a voltage that is applied and / or drops to an inverter switching element, in particular during the switching process, is at least essentially vanishingly low, in particular essentially zero. A “vanishingly low value” is to be understood in particular as a value which is in particular at least a factor 10, advantageously a factor 50, preferably a factor 100 and particularly preferably a factor 500 lower than a maximum operating value. The control unit preferably operates the power supply unit in the ZVS mode using a special control strategy known in English under the term “Assymetrical Voltage Cancelation (AVC) Control”. As a result, the control unit can advantageously be operated in the ZVS mode over a particularly wide frequency range, whereby switching losses can advantageously be minimized over a large heating power range. Alternatively, it is conceivable that the control unit operates the power supply unit in the ZVS mode using a further special control strategy, which is known in English under the term “Phase Shift (PS) Control”. It would also be conceivable for the control unit to load the power supply unit in a ZCS mode, using a suitable special control strategy. drives. A “ZCS mode” is to be understood in particular as an operating mode in which the control unit, in particular at least one inverter of the power supply unit, with at least one essentially current-free switching process, i.e. a switching process in which, in particular during the switching process, a through the Inverter switching element to be switched, the current flowing assumes a negligibly low value and which is known in English under the term "zero current switching (ZCS)" operates.

It is further proposed that the configuration unit has at least one two-pole changeover switch which is provided to at least participate in the configuration change and which in particular has the switching element. In particular, the two-pole changeover switch can have the switching element and the further switching element. As a result, a number of components and / or costs can advantageously be reduced. Furthermore, a particularly space-saving and / or compact arrangement of components can advantageously be made possible. Alternatively, the switching element and / or the further switching element could each be designed as a single-pole changeover switch. A “single pole changeover switch” is to be understood in particular as an electrical switch which is known in English by the term “Single Pole Double Throw (SPDT)” and which has at least one pole and at least two connections for a production and / or separation of an electrical one Has conductive connection and is provided in particular to open a first circuit and at the same time to close a second circuit. A “two-pole changeover switch” is to be understood in particular as an electrical switch which is known in English as “Double Pole Double Throw (DPDT)” and which, in particular in contrast to a single-pole changeover switch, has at least two poles each has at least two connections. A two-pole changeover switch can in particular be understood as a switch which has two single-pole changeover switches that can be switched simultaneously and jointly.

It is also proposed that the configuration unit is provided to change at least one resonance capacitance of the power supply unit. In this way, energy efficiency can advantageously be increased further. In particular, the resonance capacity can advantageously be adapted to different operating situations, which advantageously results in reactive power losses in the respective operating situations Power supply unit can each be reduced and preferably minimized. A “resonance capacitance” should be understood to mean the capacitance of a capacitor and / or several capacitors which, in at least one operating state of the induction cooking device with at least one inverter switching element and at least one inductor of the heating unit, form a resonant circuit.

At a certain switching frequency of the inverter, the so-called resonance frequency, a heating power provided by the inductor is at a maximum and in particular no reactive power losses occur. If a value of the resonance capacity of the resonant circuit changes, then a value of the resonance frequency of the resonant circuit also changes. For a particularly efficient operation, a switching frequency close to the resonance frequency should therefore be aimed for, which in the present case is made possible in various operating situations by changing the resonance capacitance by means of the configuration unit.

In addition, it is proposed that the power supply unit have at least one resonance capacitor element which can be switched off by the configuration unit in a half-bridge configuration of the power supply unit. In this way, flexibility can advantageously be increased further. In particular, the resonance capacitance of at least one resonant circuit in the half-bridge configuration of the power supply unit can advantageously be reduced, whereby in particular a relative distance from a switching frequency to a resonance frequency can be reduced and thus reactive power losses can be reduced. A reduced number of resonance capacitor elements to be operated can also advantageously reduce further losses caused by parasitic effects such as ohmic line losses and / or dielectric polarity reversal losses of resonance capacitor elements. In this way, the induction cooking device device can advantageously be operated particularly energy-efficiently in operating modes in which the heating unit and / or the additional heating unit provide low to medium heating outputs in the half-bridge configuration, which in particular also provides a high added value for a user, for example through Savings in energy costs, can be achieved.

It is also proposed that the power supply unit have at least one resonance capacitor element, in particular a further resonance capacitor element, which leads to a change in the resonance capacitance of the power supply unit is provided in a full bridge configuration. In this way, efficiency can advantageously be increased. In particular, the resonance capacity of the power supply unit in the full bridge configuration of the power supply unit can advantageously be adapted to a specific operating situation.

It is also proposed that the resonance capacitor element be arranged so that it can be connected in parallel to an inverter of the power supply unit in order to increase the resonance capacitance. Flexibility can advantageously be increased in this way. In addition, energy efficiency can advantageously be increased. In particular, a relative distance between a resonant frequency and a switching frequency can advantageously be minimized, particularly in operating modes of the induction cooking device device in which high to very high heating powers are provided by the heating unit in the full bridge configuration, thereby reducing reactive power losses.

As an alternative or in addition, it is proposed that the resonance capacitor element, in particular a further resonance capacitor element, be arranged so that it can be connected in series with an inverter of the power supply unit in order to reduce the resonance capacitance. Flexibility can advantageously be increased in this way. Furthermore, energy efficiency can advantageously be increased. In particular, a relative distance between a resonance frequency and a switching frequency can advantageously be minimized, especially in operating modes of the induction cooking appliance device in which medium to high heating powers are provided by the heating unit in a full bridge configuration, thereby reducing reactive power losses.

The invention is also based on a method for operating an Induktionsgar device device with at least one independent heating unit, comprising at least one inductor, and with a power supply unit for providing an alternating current for the heating unit.

It is proposed that the power supply unit for supplying the entire heating unit be configured between a half-bridge topology and a full-bridge topology. In this way, a particularly flexible and / or efficient method for operating the induction cooking appliance device can advantageously be provided.

The Induktionsgargerätvorrichtung should not be limited to the application and embodiment described above. In particular, the induction cooking appliance Device for fulfilling a mode of operation described herein have a number of individual elements, components and units that differs from a number mentioned herein.

Further advantages emerge from the following description of the drawings. In the drawing voltage, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

Fig. 1 shows an induction cooking appliance with an induction cooking appliance device, comprising a heating unit, a further heating unit and a power supply unit in a schematic view,

2 shows the power supply unit with a configuration unit in a schematic electrical circuit diagram,

Fig. 3 the power supply unit with the configuration unit in a white direct schematic electrical circuit diagram,

4 is a diagram showing an effect of a change in a resonance capacitance of the power supply unit.

Fig. 5 is a further schematic electrical circuit diagram of the Stromversor supply unit in a configuration with a changed resonance capacitance,

6 shows a schematic illustration of a method for operating the induction cooking appliance device,

7 shows a further exemplary embodiment of an induction cooking appliance device with a power supply unit with a resonance capacitor element that can be connected in parallel in a schematic electrical circuit diagram,

Fig. 8 shows a further embodiment of an Induktionsgargerätevorrichtung with a power supply unit with a serially connectable Re sonanzkondensatorelement in a schematic electrical circuit diagram and

9 shows a further embodiment of an induction cooking appliance device with a heating unit and a further heating unit, each comprising two inductors, and with a power supply unit in a schematic electrical circuit diagram.

FIG. 1 shows an induction cooking appliance 60a with an induction cooking appliance device 10a.

The induction cooking appliance 60a is designed as an induction hob. The Induktionsgar device device 10a has an independent heating unit 12a. The heating unit 12a comprises an inductor 14a. The Induktionsgargerätvorrichtung 10a has a Stromver supply unit 16a. The power supply unit 16a is provided for providing an alternating current for the heating unit 12a. The power supply unit 12a has a configuration unit 18a (see FIG. 2). The configuration unit 18a is provided for changing the configuration of the power supply unit 16a between a half-bridge topology and a full-bridge topology for supplying the entire heating unit 12a.

The induction cooking appliance device 10a has an independent further heating unit 28a. The further heating unit 28a comprises a further inductor 30a. The further inductor 30a of the further heating unit 12a can be supplied with an alternating current by the power supply unit 16a. The further heating unit 28a can be supplied by the power supply unit 16a at the same time as the heating unit 12a.

The induction cooking appliance device 10a has a control unit 48a. The control unit 48a is provided to control the power supply unit 16a. The control unit operates the power supply unit 16a in a ZVS mode (see FIG. 4).

The heating unit 12a and the further heating unit 28a can be operated simultaneously in a half-bridge topology by the configuration unit 18a (cf. FIG. 2).

Figure 2 shows an electrical circuit diagram of the power supply unit 16a with the configuration unit 18a. The configuration unit 18a has a first configuration element 62a with two contacts 64a, 66a and a second configuration element 68a with two contacts 70a, 72a. The power supply unit 16a has a supply subunit 32a for supplying the heating unit 12a. The supply subunit 32a has an inverter 34a and a resonance capacitor unit 36a. To configure the power supply unit 16a to supply the heating unit 12a in a half-bridge topology, the configuration unit 18a makes a first electrically conductive connection by means of the first configuration element 62a via the contact 64a between the inductor 14a of the heating unit 12a and the inverter 34a. The configuration unit 18a uses the second configuration element 68a to produce a second electrically conductive connection between the inductor 14a of the heating unit 12a and the inverter 34a via the contact 70a.

The configuration unit 18a has a further first configuration element 74a with two contacts 76a, 78a and a further second configuration element 80a with two contacts 82a, 84a. The power supply unit 16a has a further supply sub-unit 38a to supply the further heating unit 28a. The further supply subunit 38a has a further inverter 40a and a further resonance capacitor unit 42a. To configure the power supply unit 16a to supply the further heating unit 28a in a half-bridge topology, the configuration unit 18a uses the further first configuration element 74a to establish a first electrically conductive connection between the further inductor 30a of the further heating unit 28a and the further inverter via the contact 76a 40a ago. The configuration unit 18a uses the further second configuration element 80a to produce a second electrically conductive connection between the inductor 30a of the further heating unit 28a and the further inverter 40a via the contact 82a.

The supply subunit 32a and the further supply subunit 38a are designed to be identical to one another.

The configuration unit 18a has a switching element 44a. When the switching element is open, the heating unit 12a and the further heating unit 28a can be operated simultaneously in a half-bridge topology by the configuration unit 18a.

In a closed state of the switching element 44a, the supply subunit 32a and the further supply subunit 38a are electrically connected in series.

In the closed state of the switching element 44a, a power supply of the entire heating unit 12a is made possible by the power supply unit 16a in a full bridge topology by a configuration change by means of the configuration unit 18a. For the change in configuration, the configuration unit 18a first of all separates the electrically conductive connection via the contact 64a by means of the first configuration element 62a and establishes a new electrically conductive connection via the contact 66a. The configuration unit 18a separates the electrically conductive connection via the contact 70a by means of the second configuration element 68a and establishes a new electrically conductive connection via the contact 72a. The configuration unit 18a separates the configuration change by means of the further first configuration element 74a, the electrically conductive connection via the contact 76a and establishes a new electrically conductive de connection via the contact 78a. The configuration unit 18a separates the electrically conductive connection via the contact 82a by means of the further second configuration element 80a and establishes a new electrically conductive connection via the contact 84a. In the full bridge topology, the power supply unit 16a supplies the inductor 14a of the heating unit 12a with an alternating voltage via the inverter 34a and via the further inverter 40a.

The configuration unit 18a has a further switching element 46a. In an open state of the further switching element 46a, the heating unit 12a and the further heating unit 28a can each be operated simultaneously in a half-bridge topology by the configuration unit 18a.

In a closed state of the further switching element 46a, the supply subunit 32a and the further supply subunit 38a are electrically connected cyclically in series.

Closing the further switching element 46a enables the entire further heating unit 28a to be supplied with power in a full-bridge topology by means of a further configuration change by means of the configuration unit 18a.

FIG. 3 shows the power supply unit 16a with the configuration unit 18a. The configuration unit 18a has a two-pole changeover switch 50a. The two-pole changeover switch 50a comprises the switching element 44a and the further switching element 46a. The two-pole changeover switch 50a is provided to assist in a configuration change.

FIG. 4 shows a diagram to illustrate an effect of a change in a resonance capacitance. A switching frequency at which the control unit 48a operates the power supply unit 16a is plotted on an abscissa 94a of the diagram. A heating power is plotted on an ordinate 96a. A first heating power curve 98a shows a course of a first heating power in a first operating mode of the induction cooking device device 10a at a first resonance capacitance. The first heating power curve 98a has a maximum at a first resonance frequency 100a. A first minimum switching frequency 108a is required to achieve a maximum heating power 106a in the ZVS mode of the control unit. To reduce the heating power to a target heating power 110a, an increase in the switching frequency to a first target heating power switching frequency 112a is necessary. A second heating power curve 102a shows a course of a second heating power in a second operating mode of the induction cooking device device 10a with a lower second resonance capacitance. The second heating power curve 102a has a maximum at a higher second resonance frequency 104a. A second minimum switching frequency 114a is required for operation in a ZVS mode. To achieve the target heating power 110a, a second target heating power switching frequency 116a is required. A first relative distance 118a between the first target heating power frequency 112a and the first resonance frequency 100a in the first operating mode is greater than a second relative distance 120 between the second target heating power frequency 116a and the second resonance frequency 104a. The second operating mode consequently enables the induction cooking appliance device 10a to operate more efficiently than in the first operating mode.

The configuration unit 18a is provided to change at least one resonance capacitance of the power supply unit 16a.

FIG. 5 shows the power supply unit 16a with the configuration unit 18a in a half-bridge configuration 56a with the switching element 44a open and the further switching element 46a open. In the half-bridge configuration 56a, the heating unit 12a and the further heating unit 28a can each be operated simultaneously and independently of one another. The resonance capacitor unit 36a of the supply subunit 32a of the power supply unit 16a has a first resonance capacitor element 86a and a second resonance capacitor element 88a. In the half-bridge configuration 56a, the first resonance capacitor element 86a or the second resonance capacitor element 88a can be switched off by the configuration unit. In Figure 5, the first resonance capacitor element 86a is shown switched off. To reduce the resonance capacitance, the configuration unit disconnects by means of the first configuration element 62a through the electrically conductive connection of the resonance capacitor element 86a via the contact 64a. The further resonance capacitor unit 42a of the further supply subunit 38a of the power supply unit 16a has a further first resonance capacitor element 90a and a further second resonance capacitor element 92a. In the half-bridge configuration 56a, the further first resonance capacitor element 90a or the further second resonance capacitor element 92a can be switched off by the configuration unit. In Figure 5, the further first resonance capacitor element 90a is switched off Darge presents. In order to reduce the resonance capacitance, the configuration unit separates the electrically conductive connection of the further first resonance capacitor element 90a via the contact 76a by means of the further first configuration element 74a.

FIG. 6 shows a schematic view of a method for operating the induction cooking device device 10a. The method comprises a first method step 122a, a second method step 124a and a third method step 126a. In the first method step 122a, the power supply unit 16a supplies the entire heating unit 12a via the supply subunit 32a in a half-bridge topology. In the second method step 124a, the configuration unit 18a configures the power supply unit 16a from the half-bridge topology to a full-bridge topology. In the third method step 126a, the power supply unit 16a supplies the entire heating unit 12a via the supply subunit 32 and via the further supply subunit 38a in the full bridge topology.

In FIGS. 7 to 9, three further exemplary embodiments of the invention are shown. The following descriptions are essentially limited to the differences between the exemplary embodiments, reference being made to the description of the exemplary embodiment in FIGS. 1 to 6 with regard to components, features and functions that remain the same. To distinguish the exemplary embodiments, the letter a in the reference symbols of the exemplary embodiment in FIGS. 1 to 6 is replaced by the letter b in the reference symbols of the exemplary embodiment in FIG. 7, by the letter c in the reference symbols of the exemplary embodiment in FIG. 8 and by the letter d in the reference numerals of the exemplary embodiment in FIG. 9 have been replaced. With regard to components with the same designation, in particular with regard to components with the same reference numerals, reference can in principle also be made to the drawings and / or the description of the exemplary embodiment in FIGS. 1 to 6. FIG. 7 shows a further exemplary embodiment of an induction cooking appliance device 10b with a power supply unit 16b. The induction cooking device device 10b differs from the induction cooking device device 10a in that a power supply unit 16b has further elements compared to the power supply unit 16a. FIG. 7 shows an electrical circuit diagram of the power supply unit 16b of the induction cooking appliance device 10b. The power supply unit 16b has a resonance capacitor element 54b. The resonance capacitor element 54b is provided to change the resonance capacitance in a full bridge configuration of the power supply unit 16b to supply a heating unit 12b. In order to increase the resonance capacitance, the resonance capacitor element 54b is arranged such that it can be connected in parallel to an inverter 34b of the power supply unit 16b. The power supply unit 16b has a further resonance capacitor element 128b. The further resonance capacitor element 128b is provided to change the resonance capacitance in a full bridge configuration of the power supply unit 16b to supply a further heating unit 28b. In order to increase the resonance capacitance, the resonance capacitor element 128b is arranged such that it can be connected in parallel to a further inverter 40b of the power supply unit.

FIG. 8 shows a further exemplary embodiment of an induction cooking appliance device 10c. The induction cooking device device 10c differs from the induction cooking device device 10b only with regard to a different arrangement of resonance capacitor elements compared to the power supply unit 16b. The Stromver supply unit 16c has a resonance capacitor element 54c. The resonance capacitor element 54c is provided to change the resonance capacitance in a full bridge configuration of the power supply unit 16c to supply a heating unit 12c. In order to reduce the resonance capacitance, the resonance capacitor element 54c is arranged such that it can be connected in series with an inverter 34c of the power supply unit 16c. The power supply unit 16c has a further resonance capacitor element 128c. The resonance capacitor element 128c is provided to change the resonance capacitance in a full bridge configuration of the power supply unit 16c to supply a further heating unit 28c. To reduce the resonance capacitance, the resonance capacitor element 128c is arranged to be connected in series with a further inverter 40c of the power supply unit 16c. FIG. 9 shows a further exemplary embodiment of an induction cooking appliance device 10d with a power supply unit 16d. The induction cooking device device 10d differs from the induction cooking device device 10a with regard to a heating unit 12d and with regard to a further heating unit 28d. The heating unit 12d has two inductors 14d, 130d. The power supply unit 16d has a supply dividing unit 32d for supplying the heating unit 12d. The supply subunit 32d comprises an inverter 34d and a resonance capacitor unit 36d. The resonance capacitor unit 36d comprises a first resonance capacitor element 86d and a second resonance capacitor element 88d, which form a first resonant circuit with the inductor 14d and the inverter 34d. The resonance capacitor unit 36d comprises a third resonance capacitor element 138d and a fourth resonance capacitor element 140d, which together with the inductor 130d form a second resonant circuit. The power supply unit 16d has a configuration unit 18d, which is provided for a configuration change of the power supply unit 16d between a half-bridge topology and a full-bridge topology to supply the entire heating unit 12d or supply one of the inductors 14d, 130d. The configuration unit 18d has two switching elements 44d, 130d. The inductor 14d of the heating unit 12d can be switched on and / or off by means of the switching element 44d. The inductor 130d can be switched on and / or off by means of the switching element 134d. The further heating unit 28d has two further inductors 30d, 132d. The power supply unit 16d has a further supply subunit 38d for supplying the further heating unit 28d. The supply subunit 38d comprises a further inverter 40d and a further resonance capacitor unit 42d. The further resonance capacitor unit 42d comprises a further first resonance capacitor element 90d and a further second resonance capacitor element 92d, which form a further first resonant circuit with the further inductor 30d and the further inverter 40d. The further resonance capacitor unit 42d comprises a further third resonance capacitor element 142d and a further fourth resonance capacitor element 144d, which together with the inductor 132d form a further second resonant circuit. The configuration unit 18d is provided for a configuration change of the power supply unit 16d between a half-bridge topology and a full-bridge topology for supplying the entire heating unit 28d or for supplying one of the further inductors 30d, 132d of the further heating unit 28d. The configuration unit has two further switching elements 46d, 136d. By means of the further switching element 46d, the further inductor 30d can be switched on and / or off. The further inductor 132d can be switched on and / or off by means of the further switching element 136d.

Reference number

10 induction cooking device 12 heating unit 14 inductor

16 Power supply unit

18 Configuration unit

28 additional heating unit

30 more inductor

32 Supply subunit

34 inverters

36 Resonance Capacitor Unit

38 additional supply subunits

40 more inverters

42 further resonance capacitor unit

44 switching element

46 further switching element

48 control unit

50 two-pole changeover switch

54 resonance capacitor element

56 Half-bridge configuration

60 induction cooker

62 first configuration element

64 Contact

66 Contact

68 second configuration element 70 contact 72 contact

74 further first configuration element 76 contact Contact further second configuration element contact contact first resonance capacitor element second resonance capacitor element further first resonance capacitor element further second resonance capacitor element abscissa ordinate first heating output curve first resonance frequency second heating output curve second resonance frequency maximum heating output first minimum switching frequency target heating output first target heating output switching frequency second minimum switching frequency further target heating output switching frequency first third step relative distance Resonance capacitor element inductor further inductor switching element further switching element third resonance capacitor element fourth resonance capacitor element further third resonance capacitor element further fourth resonance capacitor element

Claims

Expectations

1. Induktionsgargerätvorrichtung (10a-d), in particular Induktionskochfeldvorrich device, with at least one independent heating unit (12a-d), comprising at least one inductor (14a-d), and with a power supply unit (16a-d) for providing an alternating current for the Heating unit (12a-d), characterized in that the power supply unit (16a-d) has a configuration unit (18a-d) which is used to change the configuration of the power supply unit (16a-d) between a half-bridge topology and a full-bridge topology. Topology for supplying the entire heating unit (12a-d) is provided.

2. Induktionsgargerätvorrichtung (10a-d) according to claim 1, characterized by an independent further heating unit (28a-d), comprising at least one further inductor (30a-d), which by the power supply unit (16a-d) simultaneously to the heating unit ( 12a-d) can be supplied.

3. Induktionsgargerätevorrichtung (10a-d) according to claim 2, characterized in that the heating unit (12a-d) and the further heating unit (28a-d) by the configuration unit (18a-d) can be operated simultaneously in a half-bridge topology.

4. Induktionsgargerätvorrichtung (10a-d) according to claim 2 or 3, characterized in that the power supply unit (16a-d) has a supply part (32a-d) which has at least one inverter (34a-d) and at least one resonance capacitor unit (36a- d) comprises for supplying the heating unit (12a-d), and has a further supply subunit (38a-d) which comprises at least one further inverter (40a-d) and at least one further resonance capacitor unit (42a-d) for supplying the others Heating unit (28a-d).

5. Induktionsgargerätevorrichtung (10a-c) according to claim 4, characterized in that the supply subunit (32a-c) and the further supply subunit (38a-c) via at least one switching element (44a-c) of the configuration unit (18a-c) are electrically connected in series.

6. Induktionsgargerätevorrichtung (10a-c) according to claim 5, characterized in that the supply subunit (32a-c) and the further supply subunit (38a-c) via at least one further switching element (46a-c) of the configuration unit electrically cyclically in series are switched.

7. Induktionsgargerätevorrichtung (10a-d) according to any one of claims 4 to 6, characterized in that the supply subunit (32a-d) and the white direct supply subunit (40a-d) are designed to be identical to one another.

8. Induktionsgargerätevorrichtung (10a-d) according to one of the preceding Ansprü surface, characterized by a control unit (48a) which operates the Stromversor supply unit (16a-d) in a ZVS mode.

9. Induktionsgargerätvorrichtung (10a-d) according to one of the preceding claims, characterized in that the configuration unit (18a-d) has at least one two-pole changeover switch (50a) which is provided to at least participate in the configuration change, and which in particular the switching element (44a-d).

10. Induktionsgargerätevorrichtung (10a-d) according to one of the preceding Ansprü surface, characterized in that the configuration unit (18a-d) is provided to change at least one resonance capacitance of the power supply unit (16a-d).

11. Induktionsgargerätvorrichtung (10a-d) according to claim 10, characterized in that the power supply unit (16a-d) has at least one resonance capacitor element (86a-d, 88a-d, 90a-d, 92a-d) which is in a half-bridge -Configuration of the power supply unit (16a-d) can be switched off by the configuration unit (18a-d).

12. Induktionsgargerätvorrichtung (10b-c) according to claim 10 or 11, characterized in that the power supply unit (16b-c) has at least one resonance capacitor element (54b-c, 128b-c) which leads to a change in the resonance capacitance of the power supply unit ( 16b-c) is provided in a full bridge configuration.

13. Induktionsgargerätevorrichtung (10b) according to claim 12, characterized in that the resonance capacitor element (54b, 128b) to increase the resonance capacity parallel to an inverter (34b, 40b) of the power supply unit (16b) can be connected.

14. Induktionsgargerätevorrichtung (10c) according to claim 12 or 13, characterized in that the resonance capacitor element (54c, 128c) is arranged to reduce the resonance capacitance in series with an inverter (34c, 40c) of the power supply unit (16c) can be connected.

15. Induction cooking appliance (60a), in particular induction hob, with an induction cooking appliance device (10a-d) according to one of the preceding claims.

16. A method for operating an induction cooking appliance device (10a-d), in particular according to one of claims 1 to 14, with at least one independent heating unit (12a-d), comprising at least one inductor (14a-d), and with a power supply unit (16a -d) for providing an alternating current for the heating unit (12a-d), characterized in that the power supply unit (16a-d) is configured to supply the entire heating unit (12a-d) between a half-bridge topology and a full-bridge topology .