EP3127398B1 - Dispositif pour appareils de cuisson - Google Patents

Dispositif pour appareils de cuisson Download PDF

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Publication number
EP3127398B1
EP3127398B1 EP15716144.9A EP15716144A EP3127398B1 EP 3127398 B1 EP3127398 B1 EP 3127398B1 EP 15716144 A EP15716144 A EP 15716144A EP 3127398 B1 EP3127398 B1 EP 3127398B1
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EP
European Patent Office
Prior art keywords
time
driver
coil
cooking appliance
voltage
Prior art date
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Application number
EP15716144.9A
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German (de)
English (en)
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EP3127398A1 (fr
Inventor
Nicolas Blasco Rueda
Alvaro Cortes Blanco
Oscar Garcia-Izquierdo Gango
Diego Puyal Puente
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP3127398A1 publication Critical patent/EP3127398A1/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/081—Arrangement or mounting of control or safety devices on stoves

Definitions

  • the invention is based on a cooking device device according to the preamble of claim 1 and a method for operating a cooking device device according to the preamble of claim 11.
  • Hobs are known from the prior art which comprise a relay with an armature element and a driver coil as well as a driver circuit which is provided to provide an average coil voltage for the driver coil.
  • a control unit is provided to operate the driver coil with a constant mean coil voltage during a switching operation of the armature element.
  • the object of the invention is in particular to provide a generic cooking appliance device with improved properties in terms of switching speed and / or switching reliability.
  • the object is achieved by the characterizing features of the independent patent claims 1 and 11, while advantageous configurations and developments of the invention can be found in the subclaims.
  • the document WO2010 / 069788 A1 discloses a cooking appliance device according to the preamble of claim 1.
  • the invention is based on a cooking appliance device, in particular a hob device, with at least one mechanical switch, which has at least one armature element and at least one driver coil, which is provided at least to trigger at least one switching process of the at least one armature element, with at least one driver circuit which is used for this purpose it is provided to provide at least one mean coil voltage for the at least one driver coil, and with a control unit which is provided to provide at least one control signal for controlling, in particular the at least one switching operation, of the at least one driver circuit.
  • control unit is provided to switch the at least one switching process, in particular the at least one switching process, from a normal state to a working state of the at least one mechanical switch, into at least a first time sub-range and at least a second time sub-range subdivide and operate the at least one driver coil differently in the at least two time subregions by means of the at least one driver circuit.
  • a "cooking device device” is to be understood as meaning in particular at least a part, in particular a subassembly, of a cooking device, in particular a hob and preferably an induction hob.
  • the cooking appliance device can also include the entire cooking appliance, in particular the entire hob and preferably the entire induction hob.
  • the cooking appliance device preferably comprises at least one inverter and at least one inductor, which is provided to be supplied with a high-frequency heating current from the at least one inverter.
  • the high-frequency heating current is provided in particular for heating, in particular cooking utensils, in particular through eddy current and / or magnetic reversal effects.
  • the at least one mechanical switch is designed in particular as a contactor and / or preferably as a relay.
  • the at least one mechanical switch can be used as an on switch, in particular SPST switch, DPST switch, SPCO switch and / or SPTT switch, and / or as a toggle switch, in particular SPDT switch, DPDT switch and / or DPCO switch be trained.
  • the at least one mechanical switch is preferably arranged between the at least one inverter and the at least one inductor and in particular is provided in at least one operating state to interrupt and / or establish at least one conduction path between the at least one inverter and the at least one inductor.
  • a “conduction path” should be understood to mean in particular an electrically conductive connection between at least two points.
  • an "on switch” is to be understood as meaning in particular a switch which, in at least one operating state, is provided to establish and / or separate an electrical connection between at least two contacts of the switch and in particular in a further one, in particular from the at least one Operating status different, operating status an electrical insulation between all contacts of the switch exists.
  • a “toggle switch” is to be understood in particular as a switch which has at least three contacts and is provided in particular to establish and / or separate an electrically conductive connection between at least two of the at least three contacts, depending on the switch position.
  • a “switching process” should be understood to mean, in particular, a process in which the at least one armature element of the at least one mechanical switch performs a movement and in which the at least one mechanical switch changes its switching state in particular. In particular, the switching process begins with the beginning of the movement and ends when the at least one anchor element comes to a standstill again.
  • the at least one switching process preferably begins and ends in a time range with a duration of a maximum of 20 ms, preferably a maximum of 15 ms and particularly preferably a maximum of 10 ms.
  • the at least one mechanical switch is in particular in a non-conductive and / or in a bouncing state during the at least one switching process.
  • the at least one switching process can include releasing at least one electrically conductive connection, which the at least one mechanical switch has in at least one operating state, and / or, in particular, completely establishing at least one, in particular further, electrically conductive connection.
  • a “normal state” is to be understood as meaning, in particular, a rest state of the at least one mechanical switch, in particular an NC (normally closed) state and / or a NO (normally open) state.
  • the at least one anchor element has a conductive connection with a break contact in the normal state.
  • a “working state” should be understood to mean, in particular, a state of the at least one mechanical switch in which the at least one armature element is deflected from the idle state, in particular by a magnetic field generated by the at least one driver coil.
  • the at least one anchor element in the working state the at least one anchor element has a conductive connection with a working contact and / or is free of a conductive connection.
  • the at least one driver coil is provided to trigger at least one switching operation of the at least one armature element
  • the at least one driver coil is provided to generate at least one magnetic field which is provided to at least one movement of the to trigger at least one anchor element.
  • an "average coil voltage” should in particular be an effective time-averaged Voltage are understood, which is applied to the at least one driver coil in at least one operating state.
  • a “partial time range” should be understood to mean, in particular, part of a time duration of the at least one switching process.
  • control unit is provided to “operate differently” the at least one driver coil in the at least two time subranges
  • the control unit is intended to operate the at least one driver coil in such a way that at least one operating parameter is in which distinguishes at least two time sub-areas.
  • a generic cooking appliance device with improved properties with regard to switching speed and / or switching reliability can be provided.
  • a switching speed of the at least one switching operation of the at least one mechanical switch can be increased and a temperature dependency of the at least one mechanical switch can advantageously be minimized.
  • an efficiency can advantageously be increased.
  • a reduced self-heating of the at least one mechanical switch can be achieved and costs can be minimized.
  • the at least one second time sub-range preferably immediately follows the at least one first time sub-range in time.
  • the fact that two time ranges “immediately follow one another in time” is to be understood in particular as meaning that the two time ranges are, at least in terms of time, immediately one behind the other and in particular have at least one common point in time.
  • the sum of the at least one first time sub-range and the at least one second time sub-range preferably corresponds to a total duration of the at least one switching operation. In this way, an efficient switching process can advantageously be achieved.
  • the at least one first time sub-range includes at least one acceleration, in particular an acceleration from a rest position and / or a start of a movement, of the at least one anchor element, in particular an acceleration of the at least one switching process can be simplified.
  • the at least one second time sub-range advantageously includes at least one springing of the at least one anchor element.
  • a "springing" of the at least one armature element should in particular bounce at least two contacts of the at least one mechanical switch and / or a state in which the at least one mechanical switch changes from an NC (normally closed) state to an open state and can, in particular, execute spring oscillations there.
  • the at least one mechanical switch is designed as a changeover switch, the expression “springs” is to be understood as meaning, in particular, a bouncing of at least two contacts of the at least one switch. In this way, in particular, an advantageously simple switching process can be achieved.
  • the control unit is provided to operate the at least one driver coil in the at least one first time subrange with a higher mean coil voltage than in the at least one second time subrange.
  • the at least one driver coil has at least one point in time of the at least one first time sub-range and preferably during part of the at least one first time sub-range, which in particular makes up at least 30%, preferably at least 50% and particularly advantageously at least 70% of the at least one first part-time range higher coil voltage than during at least one point in time of the at least one second partial time range and preferably during a part of the at least one second partial time range, which in particular makes up at least 30%, preferably at least 50% and particularly advantageously at least 70% of the at least one second partial time range.
  • the mean coil voltage preferably reaches a steady state within the at least one first time subrange and within the at least one second time subrange, a voltage level of the steady state of the at least one first time subrange having a higher value than a voltage level of the steady state of the at least one second time subrange.
  • a “higher mean coil voltage” should be understood to mean, in particular, a mean coil voltage which is at least 5%, advantageously at least 10%, preferably at least 15% and particularly preferably at least 25% greater than a reference voltage. In this way, in particular, an advantageously quick switching process can be achieved.
  • the at least one driver circuit has a voltage supply unit for supplying the at least one driver coil and the control unit is provided in at least one operating state to generate at least one output voltage of the To vary the power supply unit.
  • a “voltage supply unit” is to be understood as meaning, in particular, a unit which is provided to provide at least one potential different from a ground potential at at least one connection.
  • the voltage supply unit preferably has at least one control connection, in particular at least one input connection and at least one output connection.
  • the voltage supply unit is preferably provided to provide an output voltage that is higher than an input voltage.
  • the voltage supply unit could, for example, have at least one switch and / or be designed as a switch.
  • the at least one switch could be provided in at least one operating state to connect the at least one driver circuit to at least one of at least two power supply units and / or at least one of at least two outputs of at least one power supply unit.
  • operation of the at least one driver circuit and / or an average coil voltage can advantageously be varied in a simple manner.
  • the voltage supply unit could for example comprise at least one rectifier, in particular an AC-DC converter.
  • the voltage supply unit preferably has at least one DC voltage converter, in particular a DC-DC converter, and is preferably designed as a DC voltage converter.
  • the DC / DC converter can be used in particular as a flyback converter, single-ended flux converter, push-pull flux converter, resonance converter, multiphase converter, bridgeless PFC converter, step-down converter, step-up converter, inverse converter, synchronous converter, SEPIC converter, Cuk converter, Zeta converter, double inverter, split-piad converter Buck converter, cascaded boost converter and / or preferably be designed as a positive and / or negative charge pump. Operation of the at least one driver circuit and / or an average coil voltage can thereby be varied in a particularly advantageous manner.
  • the at least one control signal is a pulse-width modulated signal.
  • the pulse-width-modulated signal can have different duty cycles for different time ranges, in particular for the at least one first time subrange and the at least one second time subrange.
  • a "duty cycle" is intended to mean, in particular, a ratio of a time period in which a, preferably periodic, control signal from the control unit sets a switch-on value, in particular a high level, assumes, to be understood in a defined time range, preferably a period duration, of the control signal.
  • a control signal that is constant at times and that only has a high level at least in the defined time range has a duty cycle of 1.
  • a control signal that is constant at times and that has only a low level at least in the defined time range has a duty cycle of 0. In this way, in particular, simple and advantageously efficient control of the at least one mechanical switch can be achieved.
  • the at least one control signal has at least two different duty cycles during the at least one switching process. In this way, in particular, an efficient and advantageously faster switching process can be achieved. Furthermore, an advantageously simple control algorithm can be provided.
  • control unit is provided in at least one operating state, in particular at least during the at least one first time subrange, the mean coil voltage at least temporarily, preferably at least during the entire at least one first time subrange, above a normal voltage value, in particular a nominal voltage value, which to raise at least one driver coil.
  • a “normal voltage value” is to be understood as meaning, in particular, a minimum voltage value which is required in order to trigger and / or carry out a switching process of the at least one mechanical switch.
  • a “nominal voltage value” is to be understood in particular as a, in particular optimal, voltage value specified by a manufacturer, which is required to trigger and / or carry out a switching operation of the at least one mechanical switch, in particular as efficiently and / or quickly as possible.
  • the control unit is preferably provided in at least one further operating state, in particular different from the at least one operating state, in particular at least during the at least one second time subrange, to operate the at least one driver coil with the normal voltage value and / or the nominal voltage value.
  • the control unit is provided to increase the mean coil voltage above a normal voltage value
  • a value of the mean coil voltage is at least 5%, advantageously at least 10%, preferably at least 15% and particularly preferably at least 25% greater than the normal stress value.
  • the control unit is preferably provided to increase the mean coil voltage at least temporarily to twice the normal voltage value and / or the nominal voltage value. As a result, a switching speed can be increased in a particularly advantageous, simple and particularly efficient manner.
  • a method according to the invention is based on a method for operating a cooking appliance device, in particular a hob device, with at least one mechanical switch, which has at least one armature element and at least one driver coil, which is provided to trigger at least one switching process of the at least one armature element, and with at least a driver circuit, which is provided to provide at least one mean coil voltage for the at least one driver coil.
  • the at least one switching process be subdivided into at least a first time subrange and at least one second time subrange and the at least one driver coil is operated differently in the at least two time subranges by means of the at least one driver circuit.
  • a switching speed and / or a switching reliability of the at least one switching operation of the at least one mechanical switch can be increased and, advantageously, a temperature dependency of the at least one mechanical switch can be minimized.
  • FIG. 1 shows an exemplary cooking device 32 designed as an induction hob in a schematic top view.
  • the cooking appliance 32 has a hob plate with four heating zones 34. Each heating zone 34 is provided to heat exactly one cookware element (not shown).
  • the cooking device 32 comprises a cooking device device.
  • the cooking appliance device has an operating unit 36.
  • the operating unit 36 is used for the input and / or selection of a power level by a user.
  • the cooking device device comprises a control unit 28.
  • the control unit 28 has a computing unit, a storage unit and an operating program stored in the storage unit, which is provided to be executed by the computing unit.
  • FIG. 2 shows a schematic circuit diagram of the cooking appliance device.
  • the cooking appliance device has four inductors 38, 40, 42, 44. Each inductor 38, 40, 42, 44 is assigned to one of the heating zones 34.
  • the cooking appliance device also comprises two inverters 46, 48.
  • the inverters 46, 48 are designed to be identical to one another.
  • Each inverter 46, 48 has two semiconductor switches 50, 52, in particular IGBTs.
  • the control unit 28 is connected to control connections of the semiconductor switches 50, 52 (not shown).
  • Each of the inverters 46, 48 is provided to convert a pulsating rectified mains voltage of an energy source 54 into a high-frequency heating current and in particular to supply it to at least one of the inductors 38, 40, 42, 44.
  • the cooking appliance device has a plurality of conduction paths 56.
  • each of the inverters 46, 48 is connected to the inductors 38, 40, 42, 44 via line paths 56.
  • the cooking appliance device also has two resonance units 58. Each of the resonance units 58 is part of an electrical oscillating circuit and can be charged via the associated inverter 46, 48.
  • the cooking appliance device also has a switching arrangement 60.
  • the switching arrangement 60 comprises a plurality of mechanical switches 10, 12.
  • the mechanical switches 10, 12 are provided to interrupt and / or establish the conduction paths 56 between the inverters 46, 48 and the inductors 38, 40, 42, 44.
  • the switching arrangement 60 comprises six mechanical switches 10, 12.
  • the mechanical switches 10, 12 are structurally identical.
  • the mechanical switches 10, 12 are designed as changeover switches.
  • the mechanical switches 10, 12 are designed as relays in the present case.
  • Each of the conduction paths 56 can be interrupted by two mechanical switches 10, 12.
  • Two first mechanical switches 10 are each connected to a heating current output 62, 64 of the inverters 46, 48.
  • the two first mechanical switches 10 are each connected to two second mechanical switches 12.
  • the two second mechanical switches 12 are each connected to one of the inductors 38, 40, 42, 44.
  • the cooking appliance device has a plurality of driver circuits 14.
  • Each driver circuit 14 is provided to control one of the mechanical switches 10, 12.
  • the driver circuits 14 are designed to be identical to one another in the present case.
  • One of the driver circuits 14 is assigned to each of the mechanical switches 10, 12.
  • Each of the mechanical switches 10, 12 is connected to one of the driver circuits 14.
  • a single driver circuit could be assigned to at least two mechanical switches.
  • the cooking appliance device can comprise further units, such as in particular rectifiers, filters, detectors, in particular current detectors and / or voltage detectors, and / or voltage converters.
  • FIG. 8 shows an exemplary, schematic circuit diagram of one of the mechanical switches 10, 12 and one of the driver circuits 14 from FIG Figure 2 .
  • the following description is an example of one of the mechanical switches 10, 12 and can in particular be transferred to the other mechanical switches 10, 12 and the associated driver circuits 14.
  • the mechanical switch 10, 12 has an anchor element 70.
  • the anchor element 70 is made of a ferromagnetic material.
  • the mechanical switch 10, 12 also has a driver coil 72.
  • the driver coil 72 is provided to trigger at least one switching process of the armature element 70.
  • the driver coil 72 has a ferromagnetic core.
  • a driver coil can also be used be formed without a ferromagnetic core and / or have a core made of a different material.
  • the driver coil 72 is provided to attract the armature element 70, in particular by means of a magnetic force.
  • the mechanical switch 10, 12 has three contacts. A first contact is designed as a switching contact 74.
  • the switching contact 74 is connected indirectly and / or directly to one of the two heating current outputs 62, 64.
  • a second contact is designed as a normally closed contact 76.
  • the normally closed contact 76 is connected indirectly and / or directly to one of the inductors 38, 40, 42, 44.
  • a third contact is designed as a working contact 78.
  • the normally open contact 78 is connected indirectly and / or directly to one of the inductors 38, 40, 42, 44.
  • the driver circuit 14 is provided in the present case to provide an average coil voltage for the driver coil 72.
  • the driver circuit 14 comprises a driver unit 66.
  • the driver unit 66 has three connections.
  • the driver circuit 14 also has a protection unit 16.
  • the protection unit 16 is provided to protect the mechanical switch 10, 12 from overvoltage.
  • the protection unit 16 is provided to protect the driver unit 66 from an overvoltage.
  • the protection unit 16 has three connections.
  • the driver circuit 14 also has a voltage supply unit 18.
  • the voltage supply unit 18 is provided for supplying the at least one driver coil 72.
  • the voltage supply unit 18 is designed as a DC voltage converter.
  • the voltage supply unit 18 is designed as a positive charge pump.
  • the voltage supply unit 18 has three connections 20, 22, 24.
  • the voltage supply unit 18 has a control connection 20, an input connection 22 and an output connection 24.
  • a voltage supply unit can also have a different number of control connections, input connections and / or output connections.
  • a voltage supply unit could have two input connections and / or output connections.
  • the cooking appliance device also has a power supply unit (not shown).
  • the power supply unit is provided to provide an energy supply for the cooking appliance device.
  • the power pack is connected to the energy source 54.
  • a power supply unit with a different, in particular separate, Connect energy source is connected to the driver circuit 14.
  • the mechanical switch 10, 12 is also connected to the driver circuit 14.
  • the mechanical switch 10, 12 has two connections.
  • the power supply connection 68 is connected to the input connection 22 of the voltage supply unit 18.
  • the control connection 20 of the voltage supply unit 18 is connected to the control unit 28.
  • the output connection 24 of the voltage supply unit 18 is connected to a first connection of the driver coil 72. Furthermore, the output connection 24 of the voltage supply unit 18 is connected to a first connection of the protection unit 16.
  • the first connection of the driver coil 72 is connected to a first connection of the protection unit 16. Furthermore, a second connection of the driver coil 72 is connected to a second connection of the protection unit 16. Accordingly, the protection unit 16 is connected in parallel to the driver coil 72. The second connection of the driver coil 72 is connected to a first connection of the driver unit 66. The second connection of the protection unit 16 is connected to the first connection of the driver unit 66. A second connection of the driver unit 66 is connected to the control unit 28. Furthermore, a third connection of the driver unit 66 is connected to a ground connection. Alternatively or additionally, a third connection of a driver unit can also be grounded.
  • the driver unit 66 has at least one control switch 80.
  • the control switch 80 is designed as a bipolar transistor.
  • the control switch 80 is connected to a base contact via a resistor to the second connection of the driver unit 66.
  • the control switch 80 is connected to the ground connection by an emitter contact.
  • the control switch 80 is connected to the first connection of the driver unit 66 by a collector contact.
  • the driver unit 66 can have at least one further component, such as in particular at least one electrical resistor and / or at least one capacitor.
  • the protection unit 16 has a freewheeling diode 82.
  • the protection unit 16 also has a consumer unit 30.
  • the consumer unit 30 is in the present case as Zener diode formed. Alternatively, a consumer unit could also be designed as a resistor.
  • the freewheeling diode 82 is connected to the first connection of the protection unit 16 by a cathode contact.
  • the consumer unit 30 is connected to a first contact, in particular a cathode contact, to the second connection of the protective unit 16. Furthermore, the consumer unit 30 is connected to a second contact, in particular an anode contact, to an anode contact of the freewheeling diode 82.
  • a protection unit in particular instead of a freewheeling diode and / or a consumer unit, at least one switch, at least one resistor, preferably a temperature-dependent resistor, at least one fuse, at least one RC element, in particular a snubber element and / or has a Boucherot element and / or at least one varistor.
  • the control unit 28 is provided to provide control signals S 1 , S 2 for controlling the driver circuit 14.
  • the control unit 28 is provided to provide two control signals S 1 , S 2 for controlling the driver circuit 14.
  • a first control signal S 1 is a pulse-width modulated signal.
  • the first control signal S 1 is applied to the second connection of the driver unit 66.
  • a second control signal S 2 is a pulse-width modulated signal.
  • the second control signal S 2 is applied to the control connection 20 of the voltage supply unit 18.
  • at least one control signal is a constant signal.
  • control unit 28 is provided to divide at least one switching operation of the armature element 70 into a first time subrange t a and a second time subrange t b and the driver coil 72 in the two time subranges t a, t b differently by means of the driver circuit 14, in particular with at least one essentially different mean coil voltage to operate.
  • the control unit 28 is provided to change a mean potential applied to the first connection of the driver coil 72 during the at least one switching process.
  • the control unit 28 is thus provided to vary an output voltage of the voltage supply unit 18, in particular by means of the second control signal S 2 .
  • the mean coil voltage of the driver coil 72 in particular in the first time sub-range t a and the second time sub-range t b , can be varied.
  • a control unit can also be provided to connect a driver coil to a second connection to change the applied mean potential during at least one switching process, in particular by means of a first control signal.
  • a control unit is provided to change both an average potential applied to a first connection of a driver coil and an average potential applied to a second connection of a driver coil during at least one switching process.
  • Figure 4 shows a schematic and in particular not to scale diagram of various signals for controlling a switching process of the mechanical switch 10, 12.
  • the time is shown on an abscissa axis 84.
  • An ordinate axis 86 is shown as a size axis.
  • a curve 88 shows the first control signal S 1 provided by the control unit 28.
  • the first control signal S 1 can assume at least one high level and at least one low level.
  • a curve 90 shows the second control signal S 2 provided by the control unit 28.
  • the second control signal S 2 can assume at least one high level and at least one low level.
  • a curve 92 shows the output voltage of the voltage supply unit 18 and thus the electrical potential present at the output connection 24.
  • a curve 94 schematically shows the mean coil voltage of the driver coil 72.
  • a curve 96 illustrates the switching states of the mechanical switch 10, 12.
  • a "1" level defines a conductive connection between the switching contact 74 and the normally closed contact 76 of the mechanical switch 10, 12
  • a "-1" level defines a conductive connection between the switching contact 74 and the normally open contact 78 of the mechanical switch 10, 12.
  • a "0" level defines a non-conductive state.
  • the two control signals S 1 , S 2 have the low level.
  • a duty cycle of the control signals S 1 , S 2 has a value of 0 in this case.
  • a potential of 24 V is applied to the output connection 24 of the voltage supply unit 18.
  • this potential value corresponds to a normal voltage value of the driver coil 72.
  • the normal voltage value is a nominal voltage value specified by a manufacturer for the driver coil 72 used in this case.
  • a normal voltage value can also have any other value, in particular depending on a driver coil used.
  • the control switch 80 is open and therefore non-conductive. Accordingly, the driver coil 72 is de-energized in this case.
  • the switching contact 74 of the mechanical switch 10, 12 is conductively connected to the normally closed contact 76 of the mechanical switch 10, 12.
  • the second control signal S 2 changes at a point in time T 1 .
  • the first control signal S 1 has the low level.
  • the second control signal S 2 has a duty cycle with a value of 0.5.
  • a second control signal can also have any other duty cycle.
  • the potential at the output terminal 24 of the voltage supply unit 18 rises to 48 V.
  • the potential at the output terminal 24 of the voltage supply unit 18 is thus essentially 48 V during the second time interval t 2. In the present case, this potential corresponds to twice the normal voltage value of the driver coil 72.
  • the control switch 80 is open and therefore non-conductive. In this case, the drive coil 72 is de-energized.
  • the switching contact 74 of the mechanical switch 10, 12 is conductively connected to the normally closed contact 76 of the mechanical switch 10, 12.
  • the second time interval t 2 has a duration of at least 1 ms. In the present case, the second time interval t 2 has a duration of 10 ms.
  • the first control signal S 1 changes . Accordingly, the first control signal S 1 changes in the present case 10 ms after the second control signal S 2 .
  • the first control signal S 1 has the high level.
  • the first control signal S 1 thus has a duty cycle with a value of 1 during the third time interval t 3 .
  • the second control signal S 2 has the duty cycle with a value of 0.5.
  • the potential at the output connection 24 of the voltage supply unit 18 amounts to 48 V during the third time interval t 3.
  • the control switch 80 is closed and therefore conductive. At this time, a switching current flows through the driver coil 72.
  • the switching current flows through the driver coil 72 and the control switch 80 to the ground connection.
  • the driver coil 72 generates a magnetic field which is provided to attract the armature element 70.
  • an average coil voltage of 48 V is applied between the first connection of the driver coil 72 and the second connection of the driver coil 72.
  • the third time interval t 3 has a duration of at least 6 ms. In the present case, the third time interval t 3 has a duration of 10 ms.
  • the second control signal S 2 changes at a point in time T 3 .
  • the first control signal S 1 has a duty cycle with a value of 1.
  • the second control signal S 2 has the duty cycle with a value of 0.
  • the potential at the output terminal 24 of the voltage supply unit 18 drops to 24 V.
  • the potential at the output terminal 24 of the voltage supply unit 18 is essentially 24 V during the fourth time interval t 4.
  • the control switch 80 is closed and therefore conductive. In this case, a switching current flows through the driver coil 72. In this case, an average coil voltage of essentially 24 V is applied between the first connection of the driver coil 72 and the second connection of the driver coil 72.
  • the fourth time interval t 4 has a duration of 90 ms.
  • a switching process takes place in a time range t S.
  • the time range t S lies in the range of the third time interval t 3 and the fourth time interval t 4 and at least partially overlaps the two time intervals t 3 , t 4 .
  • the switching process and / or the time range t S can have a duration between 1 ms and 20 ms.
  • the switching process and / or the time range t S in the present case has a duration of 10 ms.
  • the control unit 28 is preferably provided to deactivate the inverters 46, 48 at least during the switching process.
  • the switching process starts at a point in time T S1 .
  • the point in time T S1 lies within the third time interval t 3 .
  • the switching process ends at a point in time T S2 .
  • the mechanical switch 10, 12 has completely stopped bouncing.
  • the point in time T S2 lies within the fourth time interval t4.
  • the armature element 70 changes its position so that the switching contact 74 is conductively connected to the normally open contact 78.
  • the control unit 28 is provided to divide the switching process of the armature element 70, in particular the time range t S , into a first time subrange t a and a second time subrange t b .
  • the first time sub-range t a lies within the third time interval t 3 .
  • the second time sub-range t b lies within the fourth time interval t 4 .
  • the second time sub-range t b immediately follows the first time sub-range t a in time .
  • the first control signal S 1 has the duty cycle with a value of 1.
  • the second control signal S 2 has the duty cycle with a value of 0.5.
  • the potential at the output connection 24 of the voltage supply unit 18 amounts to 48 V during the first time sub-range t a .
  • the control switch 80 is closed and accordingly conductive. In this case, a switching current flows through the driver coil 72. Accordingly, an average coil voltage of 48 V is applied between the first connection of the driver coil 72 and the second connection of the driver coil 72.
  • the control unit is provided to increase the mean coil voltage at least temporarily above a normal voltage value of the driver coil 72, in particular above 24 V.
  • the first time sub-range t a comprises at least a release and an acceleration of the anchor element 70.
  • anchor element 70 is in a non-conductive state.
  • the first control signal S 1 has the duty cycle with a value of 1.
  • the second control signal S 2 has the duty cycle with a value of 0.
  • the potential at the output terminal 24 of the voltage supply unit 18 drops to 24 V.
  • the potential at the output terminal 24 of the voltage supply unit 18 is essentially 24 V during the second time sub-range t b .
  • the control switch 80 is closed and therefore conductive. In this case, a switching current flows through the driver coil 72.
  • an average coil voltage of 24 V is essentially present between the first connection of the driver coil 72 and the second connection of the driver coil 72.
  • the second time sub-range t b comprises at least a springing of the armature element 70.
  • the second time sub-range t b comprises at least a bouncing of the armature element 70.
  • the control unit is provided to provide the driver coil 72 in the first time sub-range t a with a higher mean coil voltage to operate than in the second time sub-range t b .
  • the second control signal S 2 has two different duty cycles, in particular 0.5 and 0, during the switching process, in particular during the time range t S.
  • time T 3 is determined from empirical data and accordingly corresponds in particular to an empirical value.
  • time T 3 is 10 ms after time T 2 .
  • the control unit 28 is provided to adapt a position of the time intervals t 3 , t 4 in such a way that the first time sub-range t a is in the range of the third time interval t 3 and the second time sub-range t b is in the range of the fourth time interval t 4 .
  • a cooking appliance device comprises at least one sensor unit, which is provided to detect its presence and / or a lack of a conductive connection of at least one mechanical switch, and thus in particular a point in time T 3 , to be detected.
  • the first control signal S 1 changes .
  • a duty cycle of the first control signal S 1 has a value of 0.7.
  • the first control signal S 1 has the duty cycle with the value 0.7.
  • the first control signal S 1 has a frequency of 25 kHz.
  • the second control signal S 2 has the duty cycle with a value of 0.
  • the potential at the output terminal 24 of the voltage supply unit 18 is 24 V.
  • the control switch 80 is alternately closed and opened.
  • the first control signal S 1 causes an average current to flow through the driver coil 72.
  • the mean current corresponds to a holding current, in particular a minimum, required.
  • an average coil voltage of essentially 17 V is applied between the first connection of the driver coil 72 and the second connection of the driver coil 72.
  • the anchor element 70 can be held on the normally open contact 78.
  • the switching contact 74 is conductively connected to the normally open contact 78. As a result, efficiency can be increased and self-heating of the mechanical switch 10, 12 can be reduced.
  • the first control signal S 1 changes and has the low level.
  • the control switch 80 is open and therefore non-conductive.
  • the protective unit 16 is provided to reduce the induced voltage.
  • a circulating current caused by the induction voltage flows through the load unit 30, the freewheeling diode 82 and the driver coil 72. This allows energy in the driver coil 72 to be dissipated effectively and particularly quickly, so that a thermal dependency of the mechanical switch 10, 12 can be reduced.
  • the energy of the driver coil 72 is reduced after about 1.5 ms to 2 ms.
  • a second switching process also takes place.
  • the anchor element 70 changes its position, so that the switching contact 74 is conductively connected to the normally closed contact 76.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Relay Circuits (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (12)

  1. Dispositif pour appareil de cuisson, notamment dispositif pour table de cuisson, comprenant au moins un interrupteur mécanique (10, 12) qui comprend au moins un élément d'armature (70) et au moins une bobine d'excitation (72) configurée au moins pour déclencher au moins une opération de commutation du au moins un élément d'armature (70), au moins un circuit d'attaque (14) conçu pour fournir au moins une tension de bobine moyenne pour la au moins une bobine d'excitation (72) et un module de commande (28) conçu pour fournir au moins un signal de commande (Si, S2) pour commander le au moins un circuit d'attaque (14),
    caractérisé en ce que le module de commande (28) est conçu pour subdiviser la au moins une opération de commutation en au moins une première plage partielle de temps (ta) et au moins une seconde plage partielle de temps (tb) et pour faire fonctionner la au moins une bobine d'excitation (72) de façon différente dans les au moins deux plages partielles de temps (ta, tb) au moyen du au moins un circuit d'attaque (14), dans lequel le module de commande (28) est conçu pour faire fonctionner la au moins une bobine d'excitation (72) de manière à ce qu'au moins un paramètre de fonctionnement se différencie dans les au moins deux plages partielles de temps (ta, tb).
  2. Dispositif pour appareil de cuisson selon la revendication 1, caractérisé en ce que la au moins une seconde plage partielle de temps (tb) fait immédiatement suite temporellement à la au moins une première plage partielle de temps (ta).
  3. Dispositif pour appareil de cuisson selon la revendication 1 ou 2, caractérisé en ce que la au moins une première plage partielle de temps (ta) comprend au moins une accélération du au moins un élément d'armature (70).
  4. Dispositif pour appareil de cuisson selon l'une des revendications précédentes, caractérisé en ce que la au moins une seconde plage partielle de temps (tb) comprend au moins un rebondissement du au moins un élément d'armature (70).
  5. Dispositif pour appareil de cuisson selon l'une des revendications précédentes, caractérisé en ce que le module de commande (28) est conçu pour faire fonctionner la au moins une bobine d'excitation (72) dans la au moins une première plage partielle de temps (ta) avec une tension de bobine moyenne plus élevée que dans la au moins une seconde plage partielle de temps (tb).
  6. Dispositif pour appareil de cuisson selon l'une des revendications précédentes, caractérisé en ce que le au moins un circuit d'attaque (14) comprend une unité d'alimentation en tension (18) pour alimenter la au moins une bobine d'excitation (72) et le module de commande (28) est conçu pour faire varier, dans au moins un état de fonctionnement, au moins une tension de sortie de l'unité d'alimentation en tension (18).
  7. Dispositif pour appareil de cuisson selon la revendication 6, caractérisé en ce que l'unité d'alimentation en tension (18) comprend au moins un convertisseur de tension continue/continue.
  8. Dispositif pour appareil de cuisson selon l'une des revendications précédentes, caractérisé en ce que le au moins un signal de commande (Si, S2) est un signal modulé en largeur d'impulsions.
  9. Dispositif pour appareil de cuisson selon la revendication 8, caractérisé en ce que le au moins un signal de commande (Si, S2) comprend pendant la au moins une opération de commutation au moins deux rapports cycliques différents.
  10. Dispositif pour appareil de cuisson selon l'une des revendications précédentes, caractérisé en ce que le module de commande (28) est configuré dans au moins un état de fonctionnement pour augmenter la tension de bobine moyenne au moins temporairement au-dessus d'une valeur de tension normale de la au moins une bobine d'excitation (72).
  11. Appareil de cuisson (32) comprenant au moins un dispositif pour appareil de cuisson selon l'une des revendications précédentes.
  12. Procédé de fonctionnement d'un dispositif pour appareil de cuisson, notamment d'un dispositif pour table de cuisson, comprenant un interrupteur mécanique (10, 12) qui comprend au moins un élément d'armature (70) et au moins une bobine d'excitation (72) configurée au moins pour déclencher au moins une opération de commutation du au moins un élément d'armature (70), et au moins un circuit d'attaque (14) conçu pour fournir au moins une tension de bobine moyenne pour la au moins une bobine d'excitation (72), en particulier selon l'une des revendications 1 à 10,
    caractérisé en ce que la au moins une opération de commutation est subdivisée en au moins une première plage partielle de temps (ta) et au moins une seconde plage partielle de temps (tb) et la au moins une bobine d'excitation (72) est commandée de façon différente dans les au moins deux plages partielles de temps (ta, tb) au moyen du au moins un circuit d'attaque (14), dans lequel la au moins une bobine d'excitation (72) est commandée de manière à ce qu'au moins un paramètre de fonctionnement se différencie dans les au moins deux plages partielles de temps (ta, tb).
EP15716144.9A 2014-04-02 2015-03-24 Dispositif pour appareils de cuisson Active EP3127398B1 (fr)

Applications Claiming Priority (2)

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ES201430485 2014-04-02
PCT/IB2015/052127 WO2015150967A1 (fr) 2014-04-02 2015-03-24 Dispositif pour appareils de cuisson

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EP3127398B1 true EP3127398B1 (fr) 2020-11-04

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EP (1) EP3127398B1 (fr)
ES (1) ES2836902T3 (fr)
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WO (1) WO2015150967A1 (fr)

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ES2673129B1 (es) * 2016-12-19 2019-03-28 Bsh Electrodomesticos Espana Sa Dispositivo de aparato de cocción por inducción con al menos una unidad de conexión
KR101968553B1 (ko) 2017-01-04 2019-04-12 엘지전자 주식회사 Wpt 구현 가능한 전자 유도 가열 조리기 및 pfc 전력 변환 장치
CN108156684B (zh) * 2017-12-08 2019-07-05 广东美的厨房电器制造有限公司 用于电磁烹饪器具的加热控制电路及电磁烹饪器具

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DE3925767A1 (de) * 1988-10-25 1990-04-26 Siemens Ag Verfahren zum ansteuern eines elektromechanischen relais

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US4823112A (en) * 1987-06-08 1989-04-18 Chen Wen Sen Multi-function electric bell
DE3925467A1 (de) 1989-08-01 1991-02-07 Ernst Heiberger Verfahren zum haerten von stahlteilen
US8426985B2 (en) * 2008-09-04 2013-04-23 Hitachi Chemical Company, Ltd. Positive-type photosensitive resin composition, method for producing resist pattern, and electronic component
ES2356441B1 (es) * 2008-12-19 2012-03-13 Bsh Electrodomésticos España, S.A. Campo de cocción con un inductor, un inversor y un dispositivo de conexión.
ES2396336B1 (es) * 2010-11-10 2014-02-11 BSH Electrodomésticos España S.A. Dispositivo de calentamiento de campo de cocción y campo de cocción con dicho dispositivo
CN102195988B (zh) * 2011-05-31 2015-10-21 中兴通讯股份有限公司 实现企业网aaa服务器与公网aaa服务器合一的方法及装置
EP2680421B2 (fr) * 2012-06-29 2018-08-08 Siemens Aktiengesellschaft Convertisseur de fréquence doté d'un condensateur de circuit intermédiaire et procédé de pré-charge de celui-ci

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Publication number Priority date Publication date Assignee Title
DE3925767A1 (de) * 1988-10-25 1990-04-26 Siemens Ag Verfahren zum ansteuern eines elektromechanischen relais

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US10477625B2 (en) 2019-11-12
EP3127398A1 (fr) 2017-02-08
ES2836902T3 (es) 2021-06-28
ITBA20150014U1 (it) 2016-09-02
WO2015150967A1 (fr) 2015-10-08
US20170127479A1 (en) 2017-05-04

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