EP3127398A1 - Dispositif pour appareils de cuisson - Google Patents

Dispositif pour appareils de cuisson

Info

Publication number
EP3127398A1
EP3127398A1 EP15716144.9A EP15716144A EP3127398A1 EP 3127398 A1 EP3127398 A1 EP 3127398A1 EP 15716144 A EP15716144 A EP 15716144A EP 3127398 A1 EP3127398 A1 EP 3127398A1
Authority
EP
European Patent Office
Prior art keywords
time
coil
driver
voltage
driver circuit
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.)
Granted
Application number
EP15716144.9A
Other languages
German (de)
English (en)
Other versions
EP3127398B1 (fr
Inventor
Nicolas Blasco Rueda
Alvaro Cortes Blanco
Oscar Garcia-Izquierdo Gango
Diego Puyal Puente
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 EP3127398A1 publication Critical patent/EP3127398A1/fr
Application granted granted Critical
Publication of EP3127398B1 publication Critical patent/EP3127398B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • 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 appliance device according to the preamble of claim 11.
  • Hobs are known from the prior art, which is a relay with a
  • Anchor element and a driver coil and a driver circuit which is intended to provide an average coil voltage for the drive coil.
  • a control unit is provided to the driver coil during a
  • the object of the invention is, in particular, a generic
  • the invention is based on a cooking device device, in particular a
  • Hob device comprising at least one mechanical switch, which has at least one anchor element and at least one driver coil, which is at least provided to initiate at least one switching operation of the at least one anchor element, with at least one driver circuit, which is provided, at least one mean coil voltage for the at least a driver coil
  • control unit which is provided to provide at least one control signal for controlling, in particular the at least one switching operation, the at least one driver circuit.
  • control unit be provided for the at least one switching operation, in particular the at least one switching operation of a
  • a “cooking device device” is to be understood in particular as meaning at least one part, in particular a subassembly, of a cooking appliance, in particular a cooktop and preferably an induction cooktop
  • Garellavoriques also the entire cooking appliance, in particular the entire hob and preferably the entire induction hob, include.
  • the cooking appliance device comprises at least one inverter and at least one inductor, which is provided to be supplied by the at least one inverter with a high-frequency heating current.
  • the high-frequency heating current is intended in particular for heating, in particular cooking utensils, in particular by means of heat current and / or magnetic reversal effects.
  • the term "provided” should be understood to mean specially programmed, designed and / or equipped.Assuming that an object is intended for a specific function should in particular mean that the object fulfills this specific function in at least one application and / or operating state
  • the at least one mechanical switch is designed in particular as a contactor and / or preferably as a relay, In particular, the at least one mechanical switch can be used as a power switch, in particular SPST switch, DPST switch, SPCO switch and / or SPTT switch.
  • the at least one mechanical switch is preferably arranged between the at least one inverter and the at least one inductor and in particular in at least one
  • a "conduction path” is to be understood as meaning, in particular, an electrically conductive connection between at least two points.
  • a switch can be understood which in at least one
  • Operating state is provided to produce and / or separate an electrical connection between at least two contacts of the switch and in particular in a further, in particular different from the at least one operating condition, an electrical insulation between all contacts of the switch exist.
  • a "changeover switch” should be understood to mean, in particular, a switch which has at least three contacts and, in particular, is provided to establish and / or disconnect an electrically conductive connection between at least two of the at least three contacts, depending on the switching position "Switching operation" in particular be understood a process in which the at least one anchor element of the at least one mechanical switch a
  • the switching operation begins with a start of the movement and ends with a renewed standstill of the at least one anchor element.
  • the at least one switching operation begins and ends in a time range with a maximum duration of 20 ms, preferably of a maximum of 15 ms and particularly preferably of 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 operation.
  • the at least one switching operation can be a release of at least one electrically conductive
  • Connection which has the at least one mechanical switch in at least one operating state, and / or a, in particular complete, producing at least one, in particular further, electrically conductive connection. Furthermore, under a "normal state", in particular a rest state of the at least one
  • a mechanical switch in particular an NC (normally closed) state and / or a NO (normally open) state understood.
  • the at least one anchor element in the normal state has a conductive connection with a normally closed contact.
  • a "working state” is to be understood as meaning in particular a state of the at least one mechanical switch, in which the at least one anchor element, in particular by one of the at least one
  • the at least one anchor element in the working state has a conductive connection to a normally open contact and / or is free of a conductive connection. Including that the "at least one driver coil is intended, at least one
  • the at least one driver coil is intended to generate at least one magnetic field which is intended to trigger at least one movement of the at least one armature element a particularly time-averaged effective Voltage are understood, which rests in at least one operating state on the at least one driver coil.
  • a time division should in this
  • Control unit is provided to operate the at least one driver coil such that at least one operating parameter in the at least two time portions differs.
  • 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 advantageously a
  • Temperature dependence of the at least one mechanical switch can be minimized. Furthermore, advantageously, an efficiency can be increased. Furthermore, 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 subarea directly follows the at least one first time subarea in terms of time.
  • two time periods "follow one another in time” should be understood in particular that the two time periods are at least temporally immediately behind each other and
  • the sum of the at least one first time subarea and the at least one second time subarea preferably corresponds to a total time duration of the at least one
  • the at least one first time subarea includes at least one acceleration, in particular an acceleration from a rest position and / or a start of a
  • the at least one second time subregion comprises at least one spring of the at least one anchor element.
  • the at least one mechanical switch is designed as a switch, a bouncing of at least two contacts of the at least one is to be understood by a "spring" of the at least one anchor element mechanical switch and / or a state are understood, in which the at least one mechanical switch from an NC (normally closed) state passes into an open state and there can perform particular spring oscillations.
  • the at least one mechanical switch is designed as a changeover switch, the term "springs" should be understood to mean, in particular, bouncing of at least two contacts of the at least one switch.
  • control unit be provided to operate the at least one driver coil in the at least one first time portion with a higher average coil voltage than in the at least one second coil
  • the at least one driver coil has at least one point in time of the at least one first time subarea, and preferably during a part of the at least one first time subarea, which in particular
  • Coil voltage as during at least one time of the at least one second time portion and preferably during a portion of the at least one second time portion, which in particular at least 30%, preferably at least 50% and more preferably at least 70% of the at least one second part-time range.
  • the mean coil voltage within the at least one first time portion and within the at least one second time portion reaches a steady state, wherein a steady state voltage level of the at least one first time portion has a higher value than a steady state voltage level of the at least one second
  • a "higher mean coil voltage” should be understood to mean in particular an average coil voltage, which in comparison to a
  • Reference voltage is at least 5%, preferably at least 10%, preferably at least 15% and more preferably at least 25% greater. In this way, in particular an advantageously fast switching operation can be achieved.
  • Driver circuit has a power supply unit to a supply of the at least one drive coil and the control unit is provided in at least one operating state, at least one output voltage of Voltage supply unit to vary.
  • a "voltage supply unit” is to be understood as meaning, in particular, a unit which is provided to at least one of at least one connection
  • Ground potential to provide different potential.
  • Power supply unit while at least one control terminal, in particular at least one input terminal and at least one output terminal.
  • the voltage supply unit is provided to provide a higher output voltage in comparison to an input voltage.
  • the power supply unit could for example comprise 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, the at least one
  • Driver circuit with at least one of at least two power supplies and / or at least one of at least two outputs at least one power supply to connect.
  • an operation of the at least one driver circuit and / or an average coil voltage can advantageously be varied easily.
  • the voltage supply unit could, for example, comprise at least one rectifier, in particular an AC-DC converter.
  • the rectifier in particular an AC-DC converter.
  • Voltage supply unit at least one DC-DC converter, in particular a DC-DC converter, and is preferably as a DC-DC converter
  • the DC-DC converter can be used in particular as a flyback converter
  • Single-ended flux converters push-pull type flux transducers, resonant converters, multi-phase converters, bridgeless PFC converters, buck converters, boost converters, inverters,
  • Synchronous converter SEPIC converter, Cuk converter, Zeta converter, double inverter, split-Pi- converter, cascaded down converter, cascaded boost converter and / or preferably be designed as a positive and / or negative charge pump.
  • an operation of the at least one driver circuit and / or an average coil voltage can be varied particularly advantageously.
  • pulse width modulated signal is.
  • the pulse width modulated signal can be used for different time ranges, in particular for the at least one first
  • Time division and the at least one second time portion have different duty cycles.
  • a ratio of a time period in which a, preferably periodic, control signal of the control unit is to have a switch-on value In particular, a high level, assuming to be understood at a defined time range, preferably a period of the control signal.
  • a control signal that is constant in particular at times, which only has a high level at least in the defined time range has a duty cycle of 1.
  • a control signal which is constant, in particular at times, and which has only a low level at least in the defined time range has a duty cycle of 0. In this way, in particular a 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 operation. In this way, in particular, an efficient and advantageously fast switching operation can be achieved. Furthermore, an advantageously simple control algorithm can be provided.
  • control unit be provided in at least one operating state, in particular at least during the at least one first time subarea, for the mean coil voltage at least temporarily, preferably at least during the entire at least one first time subarea, via a normal voltage value, in particular a nominal voltage value to increase at least one drive coil.
  • a normal voltage value in particular a nominal voltage value to increase at least one drive coil.
  • Normal voltage value in particular a minimum voltage value to be understood, which is required to initiate a switching operation of the at least one mechanical switch and / or perform
  • 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 subregion, to operate the at least one drive coil with the normal voltage value and / or the rated voltage value.
  • the control unit is intended to increase the average coil voltage above a normal voltage value
  • a value of the average 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 intended to increase the average coil voltage above a normal voltage value, advantageously at least 10%, preferably at least 15% and particularly preferably at least 25% greater than the normal stress value.
  • Control unit provided to increase the mean coil voltage at least temporarily to twice the normal voltage value and / or the nominal voltage value. This can be particularly advantageous simply and in particular efficiently
  • a method according to the invention is based on a method for operating a cooking device device, in particular a cooktop device, with at least one mechanical switch, which has at least one anchor element and at least one driver coil, which is provided to trigger at least one switching operation of the at least one anchor 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 operation is subdivided into at least one first time subarea and at least one second time subarea and that the at least one driver coil is operated differently in the at least two time subareas by means of the at least one driver circuit.
  • Switching operation of the at least one mechanical switch increases and advantageously a temperature dependence of the at least one mechanical switch can be minimized.
  • 1 is a cooking appliance designed as an induction hob with four heating zones and a Garellavorraum in a plan view
  • Fig. 2 is a schematic diagram of the cooking appliance device with six
  • Fig. 3 is a schematic circuit diagram of one of the mechanical switches and a driver circuit for controlling the mechanical
  • FIG. 4 is a schematic diagram of various signals for controlling a switching state of the at least one mechanical switch.
  • FIG. 1 shows an exemplary cooking appliance 32 in the form of an induction hob in a schematic plan view.
  • the cooking appliance 32 has in the present case a
  • the cooking appliance 32 comprises a cooking appliance device.
  • the cooking appliance device has a
  • the operating unit 36 serves to input and / or select a power level by a user.
  • the cooking device device comprises a control unit 28.
  • the control unit 28 has a
  • Arithmetic unit a memory unit and a stored in the memory unit
  • FIG. 2 shows a schematic circuit diagram of the cooking appliance device.
  • Garellavoriques has four inductors 38, 40, 42, 44. Each inductor 38, 40, 42, 44 is associated with one of the heating zones 34. Furthermore, the cooking appliance device comprises two inverters 46, 48. The inverters 46, 48 are formed 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 terminals of the semiconductor switches 50, 52 (not shown). Each of the inverters 46, 48 is intended to be a pulsating rectified mains voltage of a power source 54 in a
  • the cooking appliance device has a plurality of line paths 56.
  • each of the inverters 46, 48 is connected to the inductors 38, 40, 42, 44 via conductive paths 56.
  • the cooking appliance device further comprises two resonance units 58. Each of the resonance units 58 is part of an electrical resonant circuit and can via the associated
  • Inverters 46, 48 are charged.
  • the cooking appliance device has a switching arrangement 60.
  • the switching arrangement 60 comprises a plurality of mechanical switches 10, 12.
  • the mechanical switches 10, 12 are intended to interrupt and / or establish the conductive paths 56 between the inverters 46, 48 and the inductors 38, 40, 42, 44.
  • the switching arrangement 60 comprises six mechanical switches 10, 12. Die
  • the mechanical switches 10, 12 are identical.
  • the mechanical switches 10, 12 are designed as a changeover switch.
  • the mechanical switches 10, 12 are formed in the present case as a relay.
  • Each of the conductive paths 56 is interruptible by two mechanical switches 10, 12.
  • Two first mechanical switches 10 are each with a
  • 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 for driving one of the mechanical switches 10, 12.
  • the driver circuits 14 are formed identical to one another in the present case.
  • Each of the mechanical switches 10, 12 is associated with one of the driver circuits 14.
  • Each of the mechanical switches 10, 12 is connected to one of the driver circuits 14.
  • At least two mechanical switches could be assigned a single driver circuit.
  • the cooking appliance device may comprise further units, in particular rectifiers, filters, detectors, in particular current detectors and / or
  • Voltage detectors and / or voltage transformers.
  • FIG. 3 shows an exemplary, schematic circuit diagram of one of the mechanical switches 10, 12 and one of the driver circuits 14 from FIG. 2. The following
  • the 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 has a driver coil 72.
  • the driver coil 72 is provided to initiate at least one switching operation of the armature element 70.
  • the driver coil 72 has a ferromagnetic core.
  • a driver coil can also be formed without ferromagnetic core and / or having a core of a different material.
  • the drive coil 72 is provided in at least one operating state to attract the anchor member 70, in particular by 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 indirectly and / or directly connected to one of the two Walkerstromaus réelle 62, 64.
  • a second contact is designed as a normally closed contact 76.
  • the normally closed contact 76 is indirectly and / or directly connected to one of the inductors 38, 40, 42, 44.
  • a third contact is designed as a normally open contact 78.
  • the normally open contact 78 is indirectly and / or directly connected to one of the inductors 38, 40, 42, 44.
  • the driver circuit 14 is provided in the present case, a mean
  • the driver circuit 14 includes a driver unit 66.
  • the driver unit 66 has three terminals.
  • the driver circuit 14 has a protection unit 16.
  • the protection unit 16 is intended to protect the mechanical switch 10, 12 from overvoltage.
  • the protection unit 16 is provided to protect the driver unit 66 from overvoltage.
  • the protection unit 16 has three connections.
  • the driver circuit 14 further includes a power supply unit 18.
  • the power supply unit 18 is to supply the at least one
  • the voltage supply unit 18 is designed as a DC-DC converter. In this case, the voltage supply unit 18 is designed as a positive charge pump.
  • the power supply unit 18 has three terminals 20, 22, 24. In the present case, the
  • Power supply unit 18 on a control terminal 20, an input terminal 22 and an output terminal 24.
  • a control terminal 20 an input terminal 22 and an output terminal 24.
  • a power supply unit could have two input ports and / or
  • the cooking appliance device has a power supply unit (not shown).
  • the power supply is intended to provide a power supply for the cooking appliance device.
  • the power supply is connected to the power source 54.
  • a power supply with another, in particular separate, Connect energy source is connected to the drive circuit 14.
  • the mechanical switch 10, 12 is connected to the driver circuit 14.
  • the mechanical switch 10, 12 has two connections.
  • the power supply port 68 is connected to the input port 22 of FIG.
  • Power supply unit 18 is connected to the control unit 28.
  • Output terminal 24 of the power supply unit 18 is connected to a first terminal of the drive coil 72. Furthermore, the output terminal 24 of the voltage supply unit 18 is connected to a first terminal of the protection unit 16.
  • the first terminal of the driver coil 72 is connected to a first terminal of the protection unit 16. Furthermore, a second terminal of the driver coil 72 is connected to a second terminal of the protection unit 16. Accordingly, the protection unit 16 is connected in parallel with the driver coil 72. The second terminal of the driver coil 72 is connected to a first terminal of the driver unit 66. The second port of the
  • Protection unit 16 is connected to the first terminal of the driver unit 66.
  • a second terminal of the driver unit 66 is connected to the control unit 28.
  • a third terminal of the driver unit 66 is connected to a ground terminal. Alternatively or additionally, a third terminal of a driver unit may also be grounded.
  • the driver unit 66 has at least one control switch 80.
  • Control switch 80 is formed in the present case as a bipolar transistor.
  • the control switch 80 is connected to a base contact via a resistor to the second terminal of the driver unit 66. Further, the control switch 80 is connected to the ground terminal with an emitter contact.
  • the control switch 80 is connected to a collector contact with the first terminal of the driver unit 66.
  • the driver unit 66 may have at least one further component, in particular at least one electrical resistance and / or at least one capacitor.
  • the protection unit 16 has a freewheeling diode 82. Furthermore, the protection unit 16 has a load 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 a cathode contact with the first terminal of the protection unit 16.
  • the consumer unit 30 is connected to the second terminal of the protection unit 16 with a first contact, in particular a cathode contact. Furthermore, the consumer unit 30 with a second
  • a protective 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 Wderstand, at least one fuse, at least one RC element, in particular a Snubber member and / or a sacredrot member and / or at least one varistor.
  • the control unit 28 is provided to provide control signals Si, S 2 for controlling the driver circuit 14.
  • the control unit 28 is provided to provide two control signals Si, S 2 for controlling the driver circuit 14.
  • a first control signal Si is a pulse-width-modulated signal.
  • the first control signal Si is applied to the second terminal 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 terminal 20 of the power 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 subarea t a and a second time subarea t b and the driver coil 72 in the two time subranges t a , t b by means of
  • Driver circuit 14 different, in particular with an at least in
  • control unit 28 is provided, one at the first
  • control unit 28 is provided to vary an output voltage of the voltage supply unit 18, in particular by means of the second control signal S 2 .
  • Time division t be varied.
  • a control unit may also be provided, one at a second connection of a driver coil applied average potential during at least one switching operation, in particular by means of a first control signal to change.
  • a control unit is provided, both at a first terminal of a
  • Driver coil applied mean potential as well as applied to a second terminal of a drive coil mean potential during at least one
  • FIG. 4 shows a schematic and in particular not true-to-scale diagram of various signals for controlling a switching operation 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 Si provided by the control unit 28.
  • the first control signal Si 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 a high level and at least a low level.
  • a curve 92 shows the output voltage of the voltage supply unit 18 and thus the voltage applied to the output terminal 24 electrical potential.
  • a curve 94 schematically shows the average coil voltage of the driver coil 72.
  • a curve 96 schematically shows the average coil voltage of the driver coil 72.
  • a "1" level defines a conductive connection between the switch contact 74 and the
  • a "-1" level defines a conductive connection between the switch contact 74 and the make contact 78 of the
  • a "0" level defines a non-conductive state
  • the two control signals Si, S 2 have the low level
  • a duty cycle of the control signals Si, S 2 has in this case Value from 0.
  • the output terminal 24 is at the
  • Voltage supply unit 18 a potential of 24 V on.
  • this potential value corresponds to a normal voltage value of the driver coil 72.
  • the normal voltage value is specified by a manufacturer
  • the second control signal S 2 changes .
  • the first control signal Si has the low level.
  • the second control signal S 2 has a duty cycle with a value of 0.5.
  • a second control signal may also have any other duty cycle.
  • the potential at the output terminal 24 of the power supply unit 18 rises to 48V. The potential for that
  • 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 Si changes. Accordingly, in the present case, the first control signal Si changes 10 ms after the second control signal S 2 .
  • the first control signal Si has the high level.
  • the first control signal Si has a duty cycle with a value of 1.
  • Control signal S 2 to the duty cycle with a value of 0.5. The potential for that
  • Output terminal 24 of voltage supply unit 18 is 48 V during the third time interval t 3. Furthermore, control switch 80 is closed and therefore conductive. At this time, a switching current flows through the driving coil 72. The switching current flows through the driving coil 72 and the control switch 80 to the ground terminal. In this case, the drive coil 72 generates a magnetic field, which is provided to the
  • Tighten anchor element 70 In this case, between the first terminal of the driver coil 72 and the second terminal of the driver coil 72 is a middle one
  • 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 .
  • the first control signal Si has a duty cycle with a value of 1.
  • the second control signal S 2 has the duty cycle with a value of 0. In this operating state, the potential drops at the
  • the potential at the output terminal 24 of the voltage supply unit 18 during the fourth time interval t 4 is substantially 24 V. Furthermore, the control switch 80 is closed and therefore conductive. In this case, a mean coil voltage of substantially 24 V is applied between the first terminal of the driver coil 72 and the second terminal of the driver coil 72. In the present case, the fourth time interval t 4 has a duration of 90 ms.
  • a switching operation takes place in a time range t s .
  • the time range t s is in the range of the third time interval t 3 and the fourth time interval t 4 and overlaps the two time intervals t 3 , at least partially.
  • the switching process and / or the time range t s may have a duration of between 1 ms and 20 ms.
  • the switching operation and / or the time range t s has a time duration of 10 ms in the present case.
  • the control unit 28 is provided to deactivate the inverters 46, 48 at least during the switching operation.
  • T S i the switching operation starts.
  • the time T S i lies within the third time interval t 3 .
  • the switching process ends.
  • the anchor member 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 operation of the armature element 70, in particular the time range t s , into a first time subarea t a and a second time subarea t b .
  • the first time subarea t a lies within the third time interval t 3 .
  • the second time subarea t b lies within the fourth time interval t 4 .
  • the second time subarea t b follows directly in time to the first time subarea t a .
  • the first control signal Si has the duty cycle with a value of 1.
  • Control signal S 2 to the duty cycle with a value of 0.5. The potential for that
  • Output terminal 24 of voltage supply unit 18 is 48 V during the first time division area t a . Further, control switch 80 is closed and accordingly conductive. In this case, a switching current flows through the driver coil 72. Accordingly, between the first terminal of the driver coil 72 and the second terminal of the driver coil 72 an average coil voltage of 48 V is applied. In this case, the control unit is to
  • the mean coil voltage at least temporarily over a
  • the first time subarea t a comprises at least one disengagement and acceleration of the armature element 70.
  • anchor element 70 is in a non-conductive state.
  • the first control signal Si has the duty cycle with a value of 1.
  • Control signal S 2 the duty cycle with a value of 0 on.
  • the potential at the output terminal 24 of the voltage supply unit 18 drops to 24 V.
  • the potential at the output terminal 24 is the
  • the control switch 80 is closed and therefore conductive.
  • a switching current flows through the driver coil 72.
  • the second time portion t b comprises a spring of the anchor element 70.
  • the second time portion clarstes comprises t b bouncing of the anchor member 70.
  • the control unit is provided to the driving coil 72 in the first time portion a t at a higher average coil voltage to operate as in the second time subarea t.
  • Duty cycle in particular 0.5 and 0, on.
  • the time T 3 is determined from empirical data and accordingly corresponds in particular to an empirical value. In the present case, the time T 3 is 10 ms after the time T 2 . Accordingly, the control unit 28 is provided to adapt a position of the time intervals t 3 , t 4 such that the first time subarea t a lies in the range of the third time interval t 3 and the second time subarea t is in the range of the fourth time interval.
  • a cooking device device comprises at least one sensor unit, which is intended to have a presence and / or a lack of conductive connection of at least one mechanical
  • the first control signal Si changes.
  • a duty cycle of the first control signal Si has a value of 0.7.
  • the first control signal Si has the duty cycle with the value 0.7.
  • the first control signal Si has a frequency of 25 kHz.
  • the second control signal S 2 has the duty cycle with a value of 0. In this operating state, the potential at the output terminal 24 of the power supply unit 18 is 24 V. Further, the control switch 80 is
  • the first control signal Si causes a middle current to flow through the drive coil 72.
  • the average current corresponds to a, in particular minimal, required holding current.
  • an average coil voltage of substantially 17 V is present between the first terminal of the driver coil 72 and the second terminal of the driver coil 72.
  • the anchor element 70 can be held on the working contact 78.
  • the switching contact 74 is conductively connected to the normally open contact 78. This can increase efficiency and self-heating of the mechanical switch 10, 12 can be reduced.
  • the first control signal Si changes and has the low level.
  • the control switch 80 is open and therefore non-conductive.
  • the protection unit 16 is provided to the resulting
  • a circulating current caused by the induction voltage flows through the load unit 30, the free wheeling diode 82 and the
  • Driver coil 72 In this way, an energy in the driver coil 72 can be effectively and in particular quickly degraded, so that a thermal dependence of the mechanical switch 10, 12 can be reduced.
  • the energy of the driver coil 72 is degraded after about 1.5 ms to 2 ms.
  • a second switching operation takes place.
  • the armature element 70 changes its position, so that the switching contact 74 is conductively connected to the normally closed contact 76.
  • Time interval t5 Time interval ts Time range t a Time subrange t b Time subrange

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)

Abstract

L'invention concerne un dispositif pour appareils de cuisson, en particulier un dispositif pour plaques de cuisson, comprenant au moins un interrupteur mécanique (10, 12) qui possède au moins un élément formant armature (70) et au moins une bobine excitatrice (72) adaptée au moins pour déclencher au moins une manœuvre du ou des éléments formant armature (70), au moins un circuit d'excitation (14) destiné à fournir au moins une tension de bobine moyenne à la ou aux bobines excitatrices (72), et un module de commande (28) adapté pour fournir au moins un signal (S1, S2) de commande du ou des circuits d'excitation (14). Selon l'invention, pour améliorer la vitesse et/ou la fiabilité de manœuvre, le module de commande (28) est adapté pour diviser la ou les manœuvres en au moins une première plage temporelle partielle (ta) et au moins une deuxième plage temporelle partielle (tb) et pour faire fonctionner la ou les bobines excitatrices (72) de manière différente dans lesdites au moins deux plages temporelles partielles (ta, tb) au moyen du ou des circuits d'excitation (14).
EP15716144.9A 2014-04-02 2015-03-24 Dispositif pour appareils de cuisson Active EP3127398B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201430485 2014-04-02
PCT/IB2015/052127 WO2015150967A1 (fr) 2014-04-02 2015-03-24 Dispositif pour appareils de cuisson

Publications (2)

Publication Number Publication Date
EP3127398A1 true EP3127398A1 (fr) 2017-02-08
EP3127398B1 EP3127398B1 (fr) 2020-11-04

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Country Status (5)

Country Link
US (1) US10477625B2 (fr)
EP (1) EP3127398B1 (fr)
ES (1) ES2836902T3 (fr)
IT (1) ITBA20150014U1 (fr)
WO (1) WO2015150967A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823112A (en) * 1987-06-08 1989-04-18 Chen Wen Sen Multi-function electric bell
DE3925767A1 (de) * 1988-10-25 1990-04-26 Siemens Ag Verfahren zum ansteuern eines elektromechanischen relais
DE3925467A1 (de) 1989-08-01 1991-02-07 Ernst Heiberger Verfahren zum haerten von stahlteilen
JP5447384B2 (ja) * 2008-09-04 2014-03-19 日立化成株式会社 ポジ型感光性樹脂組成物、レジストパターンの製造方法及び電子部品
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

Also Published As

Publication number Publication date
ITBA20150014U1 (it) 2016-09-02
EP3127398B1 (fr) 2020-11-04
ES2836902T3 (es) 2021-06-28
WO2015150967A1 (fr) 2015-10-08
US20170127479A1 (en) 2017-05-04
US10477625B2 (en) 2019-11-12

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