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EP4588317A1 - Dispositif de table de cuisson à induction - Google Patents

Dispositif de table de cuisson à induction

Info

Publication number
EP4588317A1
EP4588317A1 EP23764670.8A EP23764670A EP4588317A1 EP 4588317 A1 EP4588317 A1 EP 4588317A1 EP 23764670 A EP23764670 A EP 23764670A EP 4588317 A1 EP4588317 A1 EP 4588317A1
Authority
EP
European Patent Office
Prior art keywords
switching element
induction hob
switching
hob device
bus capacitor
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.)
Pending
Application number
EP23764670.8A
Other languages
German (de)
English (en)
Inventor
Diego Puyal Puente
Arturo Acevedo Simon
Nicolas Blasco Rueda
Jorge ESPAÑOL LEZA
Alvaro HERNANDO CARNICER
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 EP4588317A1 publication Critical patent/EP4588317A1/fr
Pending legal-status Critical Current

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

Definitions

  • the object of the invention is in particular, but not limited to, to provide a generic device with improved properties in terms of efficiency.
  • the object is achieved according to the invention by the features of claims 1, 15 and 16, while advantageous refinements and developments of the invention can be found in the subclaims.
  • the invention is based on an induction hob device with at least one bus capacitor, with at least one rectifier and with a mains connection for connection to a power supply network, the bus capacitor being connected via at least a first charging path for charging during a positive mains voltage partial cycle and via at least a second charging path is connected to the mains connection via the rectifier for charging during a negative mains voltage partial cycle.
  • the induction hob device has a discharge unit which comprises at least two switching units, each with at least one switching element for temporarily discharging the bus capacitor via the power supply network, with one of the switching units acting as a high-side switching unit with a high-si- de switching element and one of the switching units is designed as a lowside switching unit with a lowside switching element and the switching elements are intended to enable a discharge path from the bus capacitor back to the power connection in a closed state.
  • an “induction hob device” is to be understood as meaning at least a part, in particular a sub-assembly, of an induction hob, and in particular additional accessory units for the hob can also be included, such as a sensor unit for externally measuring a temperature of a cooking utensil and/or a food item to be cooked.
  • the induction hob device can also include the entire induction hob.
  • An induction hob device having the induction hob device comprises at least one inductor, which in at least one operating state provides energy in the form of an alternating electromagnetic field to at least one object, in particular to a cooking utensil, and an inverter unit with at least two inverter switching elements for supplying energy to the inductor.
  • the inverter switching elements of the inverter unit can be designed as semiconductor switching elements, in particular as transistors, 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 at least one bus capacitor of the induction hob device is in an assembled state
  • Induction hob device having induction hob device is preferably arranged electrically parallel to the at least two inverter switching elements of the inverter unit.
  • At least two of the rectifier elements are assigned to the first charging path and are intended to connect the bus capacitor to the mains connection during the positive mains voltage partial cycle.
  • at least two of the rectifier elements are assigned to the second charging path and are intended to connect the bus capacitor to the mains connection during the negative mains voltage partial cycle.
  • the discharge unit is intended for an at least partial or complete discharge of the bus capacitor within at least one mains voltage partial cycle and for this purpose has the at least two switching elements which, in their closed state, activate the discharge path.
  • a “highside switching unit” or a “highside switching element” is to be understood as meaning a switching unit or a switching element which, in an assembled state of the induction hob device, is connected between a positive conductor, in particular a current-carrying conductor, of the mains connection and an electrical load , in particular the bus capacitor, is arranged.
  • a “highside switching unit” or a “lowside switching element” is to be understood as meaning a switching unit or a switching element which, in the assembled state of the induction hob device, is between a negative Conductor, in particular neutral conductor and / or neutral conductor, of the mains connection and the electrical load, in particular the bus capacitor, is arranged.
  • a “switching unit” is to be understood as meaning a unit which has at least one controllable switching element.
  • the discharge unit has a first switching unit, which is designed as the high-side switching unit and which has a first switching element, which is designed as the high-side switching element.
  • the discharge unit further has a second switching unit, which is designed as the low-side switching unit and which has a second switching element, which is designed as the low-side switching element.
  • dissipative elements in particular ohmic resistors
  • the use of dissipative elements, in particular ohmic resistors can be dispensed with, whereby the installation space requirement can be reduced and/or energy efficiency can be increased, in particular despite the additional voltage drop that occurs at the PN junction of the protective diode, which, however, is essentially independent of the current intensity.
  • requirements can on components, in particular on the switching element, can be reduced.
  • a switching element preferably a MOSFET, with a relatively low current strength can be used, whereby the installation space requirement and/or costs can be reduced.
  • An “intrinsic diode” of the switching element is intended to mean, in particular, a region of the switching element which acts like a diode, in particular like a PN junction.
  • the switching element can be designed as any single quadrant switch, also known as a “single quadrant switch” in technical terms, for example as a bipolar transistor (BJT), as a bipolar transistor with an insulated gate electrode (IGBT) without an intrinsic diode, as a thyristor (SCR) or even as Gate Turn Off Thyristor (GTO).
  • BJT bipolar transistor
  • IGBT insulated gate electrode
  • SCR thyristor
  • GTO Gate Turn Off Thyristor
  • the switching element can also be designed as any current-bidirectional two-quadrant switch, in technical language also “current-bidirectional two-quadrant switch”, preferably as a MOSFET, in particular with an intrinsic anti-parallel diode.
  • the switching element in particular designed as a MOSFET, as well as the protective diode preferably have a comparable voltage strength, in particular of at least 650 V and preferably in the range from 800 V to 1000 V, in order to be able to withstand voltage peaks, for example due to a lightning strike, without damage .
  • the discharge unit has a control unit for controlling the switching elements.
  • a “control unit” should be understood to mean an electronic unit that is intended to control and/or regulate at least the switching elements of the discharge unit.
  • the control unit comprises a computing unit and in particular, in addition to the computing unit, a storage unit with a control and/or regulation program stored therein, which is intended to be executed by the computing unit.
  • the control unit can be at least partially formed in one piece with a main control unit of an induction hob device having the induction hob device.
  • control unit is intended to control the switching elements to completely discharge the bus capacitor.
  • a particularly efficient complete discharge of the bus capacitor can be made possible by such a configuration.
  • control unit is intended to control the switching elements to partially discharge the bus capacitor. This advantageously makes it possible to particularly efficiently partially discharge the bus capacitor to a desired voltage.
  • the control unit in a first configuration of the discharge unit, is intended to control the switching elements to completely discharge the bus capacitor and, in a second configuration of the discharge unit, to control the switching elements to partially discharge the bus capacitor, wherein a degree of discharge of the bus capacitor
  • at least one of the switching elements can be varied based on a duty cycle that can be controlled by the control unit.
  • the switching elements be directly controllable by the control unit. In this way, a particularly compact and efficient design can advantageously be achieved. It is conceivable that all switching elements of the discharge unit can be controlled directly by the control unit. However, depending on the type and arrangement of the switching elements, direct control of at least one of the switching elements by the control unit is not possible or expedient in all embodiments of the present invention, which is why it is proposed that the discharge unit has at least one auxiliary switching element, via which at least one of the switching elements is connected Control unit can be controlled indirectly. Such a configuration can advantageously enable safe control of the switching elements.
  • the auxiliary switching element is preferably provided to isolate the control unit from the power supply network. Without being limited to this, the auxiliary switching element can be designed, for example, as an optocoupler or the like.
  • the discharge unit can comprise a plurality of auxiliary switching elements, in particular at least one auxiliary switching element for each switching element of the discharge unit.
  • the thyristor switching element could be, for example, as a GTO (Gate Turn Off) thyristor or as a GOT (Gate Commutated Thyristor) or as a IGCT (Integrated Gate Commutated Thyristor) or as a thyristor electrode or as a photothyristor or as an LTT (Light Triggered Thyristor) or as a DIAC or as a TRIAC, preferably as an optoTRIAC, or the like. It is conceivable that all switching elements of the discharge unit are designed as thyristor switching elements.
  • At least the first switching element of the discharge unit is designed as a thyristor element, wherein a second switching element, in particular the low-side switching element, can be designed as a different type of semiconductor switching element, for example as a transistor.
  • At least one of the switching elements is designed as an optoTRIAC.
  • switching elements designed as optoTRIAC an additional control voltage source for controlling the switching elements can advantageously be dispensed with. Efficiency, in particular cost efficiency, can thus advantageously be further improved.
  • switching elements that are designed as optoTRIAC advantageously have intrinsic electrical insulation, so that additional insulation is dispensed with and cost efficiency can be further improved.
  • both switching elements are designed as NPN transistors.
  • cost efficiency can advantageously be further improved, since NPN transistors, in particular N-MOSFETs, are significantly more common on the market compared to PNP transistors and are therefore available in large quantities and from different manufacturers and are particularly inexpensive .
  • the switching elements designed as NPN transistors are preferably designed as N-MOSFETs.
  • FIG. 6 shows a further exemplary embodiment of an induction hob device in a schematic electrical circuit diagram
  • FIG. 7 shows five schematic diagrams to illustrate how the induction hob device of the exemplary embodiment in FIG. 5 works
  • FIG. 10 shows a further exemplary embodiment of an induction hob device in a schematic electrical circuit diagram
  • FIG. 11 shows six schematic diagrams to illustrate how the induction hob device of the exemplary embodiment in FIG. 9 works.
  • FIG 1 shows an induction hob 50a in a schematic representation.
  • the induction hob 50a includes a hob plate 52a and four inductors 54a, which are mounted under the hob plate 52a.
  • the induction hob device 10a has at least one bus capacitor 12a.
  • the induction hob device 10a has an electrical resistance 112a Charge the bus capacitor 12a, which is electrically arranged in series with the bus capacitor 12a.
  • an equivalent resistor 114a is shown for simplicity, which is arranged electrically in parallel to the bus capacitor 12a.
  • the equivalent resistor 114a represents all electrical loads that can be connected downstream of the bus capacitor 12a, for example inverters (not shown) of the main control unit 66a of the induction hob 50a and/or at least one of the inductors 54a (see FIG. 1) and/or the like.
  • the induction hob device 10a has a discharge unit 22a.
  • the discharge unit 22a comprises at least two switching units 23a, 25a, each with at least one switching element 24a, 26a for temporarily discharging the bus capacitor 12a via the power supply network.
  • a first switching unit 23a of the discharge unit 22a is designed as a high-side switching unit 27a.
  • a second switching unit 25a of the discharge unit 22a is designed as a low-side switching unit 29a.
  • the switching elements 24a, 26a are each designed as electromechanical relays.
  • a first switching element 24a of the discharge unit 22a is designed as a highside switching element 28a.
  • the highside switching element 28a is between a positive active conductor of the power connection 16a and the bus capacitor 12a.
  • Figure 4 shows six further schematic diagrams to illustrate how the induction hob device 10a functions in a second configuration of the discharge unit 22a.
  • the time in milliseconds is plotted on an abscissa 90a 'of a fourth diagram in FIG. 4.
  • An electrical voltage in volts is plotted on an ordinate 92a 'of the fourth diagram.
  • the fourth diagram shows the time profiles of a first control voltage 94a' and a second control voltage 96a', by means of which the control unit 34a controls the first switching element 24a and the second switching element 36a via the control voltage sources 68a, 70a in the second configuration of the discharge unit 22a.
  • activation of the switching elements 24a, 26a is provided at a maximum of the rectified AC mains voltage 82a in order to prevent overloading of the switching elements 24a, 26a due to current peaks, which occur, for example, when the switching elements 24a, 26a are activated before the maximum of the rectified AC mains voltage 82a, i.e. when the voltage increases, can be prevented.
  • the switching elements 24a, 26a are deactivated at the latest at the zero crossing of the AC mains voltage 76a.
  • control unit 34a is intended to deactivate the second switching element 26a at the latest at the zero crossing of the AC mains voltage 76a, since if the second switching element 26a is closed during the negative mains voltage partial cycle, a short circuit of the mains connection 16a would otherwise occur via the second switching element 26a.
  • the bus capacitor 12a is connected and charged to the mains connection 16a via the first charging path 18a during a positive mains voltage sub-cycle and/or via the second charging path 20a during a negative mains voltage sub-cycle via the rectifier 14a, namely on the capacitor voltage 88a (see third diagram of Figure 3), which in a charged state of the bus capacitor 12a corresponds to a peak value of the rectified AC mains voltage 82a (see second diagram of Figure 3), for example 400 V.
  • the bus capacitor 12a is then completely (see third diagram of FIG. 3) or partially (see third diagram of FIG. 4) discharged in the method, namely by the first switching element 24a and the second switching element 26a during an entire mains voltage partial cycle ( cf. fourth diagram of FIG ) is activated.
  • FIGS. 5 to 11 Four further exemplary embodiments of the invention are shown in FIGS. 5 to 11.
  • the following descriptions are essentially limited to the differences between the exemplary embodiments, with regard to the same components, features Male and functions can be referred to the description of the exemplary embodiment in Figures 1 to 4.
  • the letter a in the reference numbers of the exemplary embodiments in FIGS. 1 to 4 is replaced by the letters b to e in the reference numbers of the exemplary embodiments in FIGS. 5 to 11.
  • FIG. 5 shows a further exemplary embodiment of an induction hob device 10b in a schematic electrical circuit diagram.
  • the induction hob device 10b comprises at least one bus capacitor 12b, a rectifier 14b and a network connection 16b for connection to a power supply network (not shown), the bus capacitor 12b via at least a first charging path (not shown here, cf .
  • Figure 2 is connected to the mains connection 16b via the rectifier 14b for charging during a positive mains voltage partial cycle and via at least a second charging path (not shown here, see Figure 2) for charging during a negative mains voltage partial cycle.
  • the discharge unit 22b has a zero crossing detector 116b, which is intended to detect a zero crossing of the AC mains voltage (not shown here, see Figures 3 and 4), which represents a transition from the positive mains voltage sub-cycle to the negative mains voltage sub-cycle.
  • a zero crossing detector 116b By means of the zero crossing detector 116b it can be ensured that the switching elements 24b, 26b, in particular the second switching element 26b, are deactivated in a timely manner by the control unit 34b.
  • control of the switching elements 24b, 26b can be adapted to a mains voltage cycle of an alternating mains voltage of the power supply network.
  • the discharge unit 22b namely the high-side switching unit 27b, has a first protection diode 118b.
  • the discharge unit 22b namely the low-side switching unit 29b
  • the high-side switching unit 27b and the low-side switching unit 29b are therefore designed as voltage-bidirectional two-quadrant switches.
  • FIG 6 shows a further exemplary embodiment of an induction hob device 10c in a schematic electrical circuit diagram.
  • the induction hob device 10c comprises at least one bus capacitor 12c, a rectifier 14c and a network connection 16c for connection to a power supply network (not shown), the bus capacitor 12c via at least a first charging path (not shown here, cf .
  • Figure 2 is connected to the mains connection 16c via the rectifier 14c for charging during a positive mains voltage sub-cycle and via at least a second charging path (not shown here, see Figure 2) for charging during a negative mains voltage sub-cycle.
  • the induction hob device 10c has a discharge unit 22c, which has at least two switching units 23c, 25c, namely a high-side switching unit 27c and a low-side switching unit 29c, each with at least one switching element 24c, 26c for temporarily discharging the bus capacitor 12c via the power supply network comprises, wherein a first switching element 24c is designed as a high-side switching element 28c and a second switching element 26c is designed as a low-side switching element 30c.
  • the switching elements 24c, 26c are intended to in a closed state a discharge path (not shown here, see figure
  • the discharge unit 22c has a control unit 34c for controlling the switching elements 24c, 26c. At least one of the switching elements 24c, 26c can be controlled directly by the control unit 34c. In the present case, both switching elements 24c, 26c can be controlled directly by the control unit 34c.
  • the discharge unit 22c only has a first control voltage source 68c.
  • the switching elements 24a, 26c can be controlled simultaneously by the control unit 34c using a first control voltage 94c (see FIG. 7) provided by the first control voltage source 68c.
  • Figure 7 shows five schematic diagrams to illustrate how the induction hob device 10c functions in a first configuration of the discharge unit 22c.
  • the time in milliseconds is plotted on an abscissa 78c of a second diagram in FIG. 7.
  • An electrical voltage in volts is plotted on an ordinate 80c of the second diagram.
  • the second diagram shows a time profile of a rectified AC mains voltage 82c, in which the rectifier 14c rectifies the AC mains voltage 76c in the operating state of the induction hob device 10c.
  • the time in milliseconds is plotted on an abscissa 84c of a third diagram in FIG. 7.
  • An electrical voltage in volts is plotted on an ordinate 86c of the third diagram.
  • the third diagram shows a time course of a capacitor voltage 88c present on the bus capacitor 12c in the first configuration of the discharge unit 22c.
  • FIG 8 shows a further exemplary embodiment of an induction hob device 10d in a schematic electrical circuit diagram.
  • the induction hob device 10d comprises at least one bus capacitor 12d, a rectifier 14d and a power connection 16d for connection to a power supply network (not shown), the bus capacitor 12d via at least a first charging path (not shown here, see Figure 2) for charging during a positive mains voltage sub-cycle and via at least a second charging path (not shown here, see Figure 2) for charging during a negative mains voltage sub-cycle via the rectifier 14d with the mains connection 16d connected is.
  • the induction hob device 10d has a discharge unit 22d, which has at least two switching units 23d, 25d, namely a high-side switching unit 27d and a low-side switching unit 29d, each with at least one switching element 24d, 26d for temporarily discharging the bus capacitor 12d via the power supply network comprises, wherein a first switching element 24d is designed as a high-side switching element 28d and a second switching element 26d is designed as a low-side switching element 30d.
  • the switching elements 24d, 26d are intended to enable a discharge path (not shown here, see FIG. 2) from the bus capacitor 12d back to the power supply connection 16d in a closed state.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rectifiers (AREA)

Abstract

L'invention concerne un dispositif de table de cuisson à induction (10a-e) comprenant au moins un condensateur de bus (12a-e), au moins un redresseur (14a-e), une connexion de réseau (16a-e) pour la connexion à un réseau d'alimentation électrique, le condensateur de bus (12a-e) étant connecté à la connexion de réseau (16a-e) par l'intermédiaire du redresseur (14a-e) via au moins un trajet de charge (18a-e) pour la charge pendant un cycle partiel de tension de réseau positive et via au moins un second trajet de charge (20a-e) pour la charge pendant un cycle partiel de tension de réseau négative, et comprenant une unité de décharge (22a-e) ayant au moins deux unités de commutation (23a-e, 25a-e) avec au moins un élément de commutation respectif (24a-e, 26a-e) pour décharger périodiquement le condensateur de bus (12a-e) par l'intermédiaire du réseau d'alimentation électrique, l'une des unités de commutation (23a-e) étant conçue comme une unité de commutation côté haut (27a-e) avec un élément de commutation côté haut (28a-e) et l'une des unités de commutation (25a-e) étant conçue comme une unité de commutation côté bas (29a-e) avec un élément de commutation côté bas (30a-e), et les éléments de commutation (24a-e), 26a-e) étant conçus de telle sorte qu'à l'état fermé, ils libèrent un trajet de décharge (32a-e) du condensateur de bus (12a-e) vers la connexion de réseau (16a-e).
EP23764670.8A 2022-09-16 2023-09-08 Dispositif de table de cuisson à induction Pending EP4588317A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22382855 2022-09-16
PCT/EP2023/074701 WO2024056532A1 (fr) 2022-09-16 2023-09-08 Dispositif de table de cuisson à induction

Publications (1)

Publication Number Publication Date
EP4588317A1 true EP4588317A1 (fr) 2025-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP23764670.8A Pending EP4588317A1 (fr) 2022-09-16 2023-09-08 Dispositif de table de cuisson à induction

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EP (1) EP4588317A1 (fr)
WO (1) WO2024056532A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025237998A1 (fr) * 2024-05-16 2025-11-20 BSH Hausgeräte GmbH Dispositif de plaque de cuisson à induction, plaque de cuisson à induction et procédé de fonctionnement d'un dispositif de plaque de cuisson à induction

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096122A1 (fr) 2020-11-06 2022-05-12 Intell Properties B.V. Agencement de circuit pour un appareil de cuisson à induction, appareil de cuisson à induction et procédé de fonctionnement d'un appareil de cuisson à induction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2628875T3 (es) * 2011-10-11 2017-08-04 BSH Hausgeräte GmbH Equipo de calentamiento por inducción
FR3000361B1 (fr) * 2012-12-20 2014-12-26 Fagorbrandt Sas Procede et disposiif d'alimentation en puissance des moyens d'induction
KR20220039031A (ko) * 2020-09-21 2022-03-29 엘지전자 주식회사 무소음 용기 감지 기능을 제공하는 유도 가열 장치 및 그의 동작 방법

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096122A1 (fr) 2020-11-06 2022-05-12 Intell Properties B.V. Agencement de circuit pour un appareil de cuisson à induction, appareil de cuisson à induction et procédé de fonctionnement d'un appareil de cuisson à induction

Also Published As

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