EP3123816A1 - Cooking appliance device having a self-controlling bypassing unit - Google Patents
Cooking appliance device having a self-controlling bypassing unitInfo
- Publication number
- EP3123816A1 EP3123816A1 EP15715445.1A EP15715445A EP3123816A1 EP 3123816 A1 EP3123816 A1 EP 3123816A1 EP 15715445 A EP15715445 A EP 15715445A EP 3123816 A1 EP3123816 A1 EP 3123816A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- bridging
- switch
- cooking appliance
- control
- 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
Links
- 238000010411 cooking Methods 0.000 title claims abstract description 38
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 238000004146 energy storage Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 description 15
- 230000006698 induction Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- QDSRUIDWGNCDAY-LIRRHRJNSA-N (2s)-2-[(2r)-1-chloro-2-hydroxypropan-2-yl]-10-hydroxy-5-methoxy-1,2-dihydrofuro[2,3-c]xanthen-6-one Chemical compound O1C2=C(O)C=CC=C2C(=O)C2=C1C(C[C@H](O1)[C@@](C)(O)CCl)=C1C=C2OC QDSRUIDWGNCDAY-LIRRHRJNSA-N 0.000 description 1
- KJBWWVTTZNVMKW-LPYMAVHISA-N 1-(dipyridin-2-ylmethylideneamino)-3-[(E)-(2-hydroxyphenyl)methylideneamino]thiourea Chemical compound Oc1ccccc1\C=N\N\C([S-])=[NH+]/N=C(c1ccccn1)c1ccccn1 KJBWWVTTZNVMKW-LPYMAVHISA-N 0.000 description 1
- ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 2,8-bis(diphenylphosphoryl)dibenzothiophene Chemical compound C=1C=CC=CC=1P(C=1C=C2C3=CC(=CC=C3SC2=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
-
- 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
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
- H05B1/0261—For cooking of food
- H05B1/0266—Cooktops
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
Definitions
- the invention is based on a cooking device device according to the preamble of claim 1.
- Cooking hobs are known from the prior art, which comprise a relay and a driver circuit which is provided for driving the relay, wherein the driver circuit comprises a surge protection circuit comprising a freewheeling diode and a zener diode, and a switch bridging the zener diode. Furthermore, a control unit is provided to control the switch in at least one operating state directly by a control signal in order to bridge the Zener diode.
- the object of the invention is, in particular, a generic
- the invention is based on a cooking device device, in particular a
- Hob device preferably an induction hob device, with at least one mechanical switch, at least one driver circuit which is provided for driving the at least one mechanical switch and which comprises a protection unit and a bridging unit, which is provided in at least one operating state, the protection unit at least partially, in particular at least one, preferably discrete, component of the protection unit to bridge.
- a "cooking device device” is to be understood as meaning, in particular, 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 cooking appliance device has a control unit.
- 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 and in particular comprises at least one driver coil and at least one in particular by means of a generated by the at least one driver coil
- 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, and / or as a changeover 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 in at least one operating state, intended 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" is to be understood as meaning, in particular, an electrically conductive connection between at least two points
- Driver circuit in particular a circuit to be understood, which is intended to provide at least one switching current and / or at least one switching voltage for the at least one mechanical switch, in particular the at least one drive coil of the at least one mechanical switch.
- the at least one driver circuit may only discrete components and in particular is free of ICs. Under a "protection unit" should
- the protection unit can at least one switch, at least one resistor, preferably a temperature-dependent resistor, in particular an NTC-Wderstand and / or a PTC resistor, at least one fuse, at least one
- Bimetallic element at least one RC element, in particular a Snubber member and / or a Boucherot member, at least one varistor and / or preferably comprise at least one diode.
- the protection unit is provided to survive at least one switching operation, preferably each switching operation, of the at least one mechanical switch without damage.
- a switching operation should be understood to mean in particular a process in which the at least one anchor element of the at least one mechanical switch undergoes a movement and in which the at least one mechanical switch
- the at least one mechanical switch is in a non-conductive and / or bouncing state during the at least one switching operation.
- the at least one switching operation may comprise releasing at least one electrically conductive connection, which the switch has in at least one operating state, and / or one, in particular complete, producing at least one, in particular further, electrically conductive connection.
- a "switching state” is to be understood as meaning, in particular, a state of the at least one mechanical switch and / or at least one control signal of the at least one mechanical switch, in particular at least one idle state, at least one on state, at least one hold state and / or at least one turn off state
- At least one idle state is defined in particular by a normal state, in particular an NC (normally closed) state and / or a NO (normally open) state
- the at least one holding state comprises in particular a holding of the at least one mechanical switch, in particular of the at least one anchor element, preferably in the working operating state.
- the at least one switch-off state comprises in particular at least one, preferably exactly one, switching operation, which preferably converts the at least one mechanical switch from a working operating state into a normal operating state, wherein in particular the at least one armature element transitions from a normally open contact into a normally closed contact, and / or at least one Dismantling an energy stored in the at least one drive coil, in particular a current and / or a voltage.
- a "bridging unit” should be understood to mean, in particular, a unit and / or a circuit which is provided to bypass an object, in particular at least one, preferably discrete, component by means of an electrical connection
- Bridging unit in at least one operating state at least one
- the bridging unit can be at least one, preferably voltage-controlled, bypass switch, in particular a thyristor and / or a transistor, in particular a
- Bipolar transistor and / or a MOSFET which may be connected in particular parallel to the object.
- Bridging switch designed as a unipolar switch and / or unidirectional switch.
- the at least one bypass switch may also be bidirectional. Under the term “low impedance" is intended in this
- an electrical resistance of not more than 10 ⁇ advantageously of not more than 5 ⁇ , preferably of not more than 100 mO and particularly preferably of not more than 10 mQ, can be understood. Including that at least one
- Bridging unit is designed "self-controlling" is to be understood in particular that the at least one bridging unit in at least one
- Garellavoriques be provided with improved properties in terms of efficiency and control. Furthermore, it is advantageously possible to avoid overvoltages, in particular at the at least one mechanical switch, and thus, in particular, to protect sensitive components. In particular, a
- the at least one mechanical switch accelerates and advantageously a temperature dependence of the at least one mechanical switch can be minimized. Furthermore, a reduced self-heating of the at least one mechanical switch can be achieved and costs can be minimized.
- the bridging unit has at least two, preferably exactly two, bridging connections and at least one, preferably exactly one, control connection. Under a "bridging connection" should in this
- connection in particular a connection, in particular an input and / or output, the bridging unit are understood, which is connected to at least one terminal of at least one object to be bridged.
- the at least two bridging connections are connected to one another in a low-resistance manner, at least in an operating state, in particular a bridging state.
- the at least two bridging connections are at least in a further, in particular of the at least one operating state, in particular the
- high-resistance should be understood as meaning in particular an electrical resistance of at least 500 ⁇ , advantageously of at least 1 k ⁇ , preferably of at least 5 k ⁇ and particularly preferably of at least 10 k ⁇
- Control connection should be understood in this context, in particular, a connection, in particular an input, the bridging unit, which is provided, depending on at least one applied signal, in particular an electrical potential and / or a current, a state of the at least one bridging unit, in particular a presence and / or a
- the at least one Control connection free from a, in particular direct, connection to the control unit.
- the at least one control connection can be embodied identically, in particular, with at least one of the bridging connections. In this way, in particular a cost-effective and compact bridging unit can be achieved, which
- the bridging unit is designed to be current-controlled, a simple and, in particular, autonomous control of the bridging unit can advantageously be achieved. It is further proposed that the bridging unit in the case of an at least substantially vanishing current through the at least one
- Control terminal intended to at least partially bridge the protection unit.
- An "at least substantially vanishing current intensity” should be understood to mean, in particular, a current intensity of at most 500 mA, in particular of at most 100 mA, preferably of at most 10 mA and particularly advantageously of not more than 1 mA, whereby in particular a control of the bridging unit can be further simplified ,
- Bridging unit has at least one energy storage unit which defines at least one, in particular temporal, parameters of bridging the protection unit in at least one operating state. It should under one
- the "energy storage unit” can be understood to mean, in particular, a unit which is provided in at least one operating state, in particular to store electrical energy
- the at least one energy storage unit can be designed, for example, as a battery, as an accumulator, as an inductance and / or advantageously as a capacitor
- a state of the bridging unit can be adapted to different control options .
- the at least one parameter could, for example, be a bridging inertia, in which case a "bridging inertia" should be understood to mean, in particular, a time duration between a control and a start of the bridging.
- the at least one parameter is determined by a period of time
- the duration of the bridging is in particular maximum 500 ⁇ , preferably at most 100 ⁇ , preferably at most 50 ⁇ and particularly preferably at most 20 ⁇ . This allows in particular an adaptation of
- Bridging unit can be simplified to different control variants. Furthermore, it is proposed that the control unit is provided to at least one, preferably exactly one, control signal for controlling a
- Switching state of the at least one mechanical switch provide.
- a switching state of the at least one mechanical switch can advantageously be changed easily.
- the at least one control signal is at least partially a pulse width modulated signal.
- the pulse width modulated signal may have different duty cycles for different time periods.
- a "duty cycle" should be understood to mean, in particular, a ratio of a time period in which a control signal of the control unit, which assumes a switch-on value, in particular a high level, to a period duration of the control signal If the duration of the bridging of a time duration of at least one low level of the pulse-width-modulated signal corresponds to an activation, in particular an efficiency can be increased and a turn-off behavior can be improved.
- the protection unit comprises at least one consumer unit, in particular a resistor and / or preferably a Zener diode.
- a shutdown of the at least one mechanical switch can be accelerated. Furthermore, advantageously, a temperature dependence of the at least one mechanical switch can be minimized. If the bridging unit is provided to bridge the at least one consumer unit, a switch-off operation of the at least one mechanical unit can be effected
- 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 a control signal for controlling a
- Switching state of the at least one mechanical switch and Fig. 5 is the schematic diagram of Figure 3 with an exemplary
- 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 each other. 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.
- Switching arrangement 60 comprises a plurality of mechanical switches 10, 12.
- the mechanical switches 10, 12 are provided to connect the conducting paths 56 between the two
- the switching arrangement 60 comprises six mechanical switches 10, 12.
- 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 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 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
- Driver circuits 14 connected.
- at least one Driver circuit form differently.
- 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.
- 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 has a ferromagnetic core.
- a driver coil may also be formed without a ferromagnetic core and / or have 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 comprises a driver unit 66.
- the driver unit 66 serves to drive the driver circuit 14.
- the driver unit 66 is provided to control a function of the driver circuit 14.
- 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 on.
- the driver circuit 14 further includes a bypass unit 18.
- the bridging unit 18 has three terminals 20, 22, 24. In the present case, the bridging unit 18 has two bridging connections 20, 22 and a control connection 24.
- the cooking appliance device has a
- the supply unit is provided to provide a supply voltage for the driver circuit 14.
- a supply connection 68 is connected to the driver circuit 14.
- the mechanical switch 10, 12 is connected to the driver circuit 14.
- the mechanical switch 10, 12 has two connections.
- the supply terminal 68 is connected to a first terminal of the drive coil 72.
- the supply connection 68 is connected to a first connection of
- Control terminal 24 of the bypass unit 18 is connected.
- the first terminal of the driver coil 72 is connected to a first terminal of
- Protective unit 16 connected. Furthermore, the first terminal of the driver coil 72 is connected to the control terminal 24 of the bypass unit 18. A second terminal of the driver coil 72 is connected to a first terminal of the driver unit 66. The second terminal of the driver coil 72 is connected to a third terminal of the protection unit 16. Furthermore, the second terminal of the driver coil 72 is connected to the second bridging terminal 22 of the bridging unit 18.
- the first connection of the protection unit 16 is connected to the control terminal 24 of
- a second terminal of the protection unit 16 is connected to the first bridging terminal 20 of the bridging unit 18.
- the third terminal of the protection unit 16 is connected to the second bridging terminal 22 of the bridging unit 18. Furthermore, the third port is the
- Guard unit 16 connected to the first terminal of the driver unit 66.
- the second bridging terminal 22 of the bridging unit 18 is further connected to the first terminal of the driver unit 66.
- Driver unit 66 is connected to the control unit 28. Furthermore, a third one Connection of the driver unit 66 connected to a ground fault. 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.
- Control switch 80 is connected to a collector contact with the first terminal of 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 formed in the present case as a Zener diode.
- the freewheeling diode 82 is connected to a cathode contact with the first terminal of the protection unit 16.
- the freewheeling diode 82 is connected to the second terminal of the protection unit 16 with an anode contact.
- the consumer unit 30 is provided with a first contact, in particular a
- the consumer unit 30 is connected to a second contact, in particular a
- Anode contact connected to the second terminal of the protection unit 16. Furthermore, the consumer unit 30 is connected to the second contact, in particular the anode contact, with the anode contact of the freewheeling diode 82.
- the bridging unit 18 has at least one in the present case
- the Bridging switch 84 on. Furthermore, the bridging unit 18 has a
- the energy storage unit 26 is formed in the present case as a capacitor.
- the energy storage unit 26 stands with the
- the bridging unit 18 may comprise at least one further component, in particular at least one electrical component
- the bridging unit 18 is intended to at least partially bridge the protection unit 16 in at least one operating state. This is the
- Bridging unit 18 free of direct connections to the control unit 28. Further, the bridging unit 18 is provided to bridge the load unit 30 in the at least one operating state. In the present case, the
- the Bridging switch 84 provided to bypass the consumer unit 30 in the at least one operating state.
- the bridging unit 18 is designed to be current-controlled. In this case, a bridging state of the bridging unit 18 may be changed depending on a current flowing through the control terminal 24 of the bridging unit 18.
- the control unit 28 is provided to provide a control signal for controlling a switching state of the mechanical switch 10, 12. The control signal of the control unit 28 is applied to the second terminal of the driver unit 66.
- Figure 4 shows a schematic diagram of the control signal for controlling a switching state of the mechanical switch 10, 12 and associated therewith
- a curve 90 shows the control signal provided by the control unit 28.
- the control signal is given in the present case, at least partially by a pulse width modulated signal. Accordingly, the control signal can assume at least a high level and at least a low level.
- a curve 92 illustrates the switching operations.
- a "1" level defines a conductive connection between the switch contact 74 and the normally closed contact 76 of the mechanical switch 10, 12.
- a "-1" level defines a conductive connection between the switch contact 74 and the make contact 78 of the mechanical switch 10 , 12.
- a "0" level defines a non-conductive state.
- the control signal has the low level.
- the control switch 80 is open and therefore non-conductive. In this case, no current flows into the control connection 24 of the bridging unit 18 In this case, the bridging terminals 20, 22 are connected with high resistance.
- bypass switch 84 is non-conductive. Furthermore, the drive coil 72 is current-free. Furthermore, the switching contact 74 of the mechanical switch 10, 12 is conductively connected to the normally closed contact 76.
- control signal changes.
- Time interval t 2 the control signal to the high level.
- the control switch 80 is closed and therefore conductive.
- a partial current flows into the control terminal 24 of the bridging unit 18.
- the bridging terminals 20, 22 are connected to low resistance.
- the bypass switch 84 is conductive. Accordingly, the partial flow through the
- Bypass switch 84 and the control switch 80 to flow to the ground terminal. Furthermore, in the present case, the partial flow can flow to the ground connection through the consumer unit 30, which is connected in particular in the forward direction, and the control switch 80.
- the partial flow which by the
- Bridging unit 18 flows, further provided to charge the energy storage unit 26. Further, 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, a maximum average current flows through the driver coil 72. As a result, a first switching operation takes place.
- the anchor element 70 changes its
- the second time interval t 2 has a time duration of 100 ms in the present case.
- the switching process begins at a time T s -i.
- the switching operation ends at a time T S 2- At the time T S 2 bouncing of the mechanical switch 10, 12 is completely completed.
- a switching operation in the present case has a duration of 10 ms.
- the control unit 28 is provided to the
- Inverter 46, 48 at least during the switching process to disable.
- the control signal changes. From the time T 2 , the control signal is given by a pulse width modulated signal. A duty cycle of the control signal has a value of 0.7. During a whole third time interval ⁇ , the control signal has the duty cycle with the value 0.7. Furthermore, the control signal has a frequency of 25 kHz. In this hold state, the control signal causes the control switch 80 to be alternately closed and opened is. At a high level of the control signal, an operation analogous to the on state takes place. At a low level of the control signal is the
- Control switch 80 is opened and therefore non-conductive. In this case, no current flows into the control terminal 24 of the bridging unit 18.
- the bridging unit 18 is provided in this case, in particular a case of a vanishing current through the control terminal 24, to at least partially bridge the protection unit 16. In the present case, the bridging unit 18 is provided to bridge the consumer unit 30. This ensures a charge of
- the energy storage unit 26 is provided to define a parameter of a bypass of the protection unit 16.
- the parameter is given by a period of bridging.
- the duration of the bridging corresponds to the maximum time duration in which the bridging terminals 20, 22, at
- the duration of the bridging corresponds in the present case just a time duration of the low level of the pulse width modulated signal.
- the duration of the bridging corresponds to 12 ⁇ in the present case. Due to the sudden switching off of the current, a high induction voltage occurs through the driver coil 72.
- the protection unit 16 and / or the bridging unit 18 are intended to reduce this induction voltage.
- a loop current caused by the induction voltage flows through the bypass unit 18, the flywheel diode 82, and the drive coil 72. In this case, the circulating current flows through the bypass switch 84, the flywheel diode 82, and the drive coil 72.
- a mean current flows through the driver coil 72.
- the average current corresponds to a, in particular minimal, required holding current.
- 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 control signal changes.
- the control signal has the low level.
- the Control switch 80 is opened and therefore non-conductive. Initially, an analog operation takes place relative to the low level of the hold state.
- the bypass switch 84 changes to a non-conductive state. In this case, the bridging terminals 20, 22 are connected with high resistance.
- Induction voltage caused circulating current flows through the load unit 30, the freewheeling diode 82 and the drive coil 72.
- This allows an energy in the drive coil 72 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.
- the switching operation begins at a time T S 3.
- the switching process ends at a time T S4 .
- T S4 bouncing of the mechanical switch 10, 12 is completely completed.
- the fourth time interval t 4 is followed by the first time interval ti.
- Figure 5 shows the schematic diagram of Figure 3 with an exemplary
- the bypass switch 84 is formed in the present case as a bipolar transistor.
- the designed as a capacitor energy storage unit 26 has in the present case has a capacity of about 200 nF.
- the control terminal 24 of the bridging unit 18 is connected to a first contact of a first resistance 94 of the bridging unit 18.
- a second contact of the first resistor 94 is connected to a base contact of the bypass switch 84.
- the second contact of the first resistor 94 is connected to a first contact of the energy storage unit 26. Further, the second contact of the first Wderstands 94 with a first contact of a second Wderstands 96 of
- the Bridging unit 18 connected.
- the first contact of the energy storage unit 26 is connected to the first contact of the second resistor 96.
- the first contact of the energy storage unit 26 is connected to the base contact of the bypass switch 84.
- the first contact of the second resistor 96 is connected to the base contact of the bypass switch 84.
- a second contact of the energy storage unit 26 is connected to a second contact of the second resistance 96.
- the second contact of the energy storage unit 26 is further connected to the first bridging terminal 20.
- the second contact of the energy storage unit 26 is connected to an emitter contact of the bypass switch 84.
- the second contact of the second resistor 96 is connected to an emitter contact of the bypass switch 84.
- a collector contact of the bypass switch 84 is connected to the second
- the second resistor 96 is connected in parallel with the energy storage unit 26. Further, the bypass switch 84 is connected in parallel to the load unit 30.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Electronic Switches (AREA)
- Relay Circuits (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201430407 | 2014-03-24 | ||
PCT/IB2015/052015 WO2015145309A1 (en) | 2014-03-24 | 2015-03-19 | Cooking appliance device having a self-controlling bypassing unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3123816A1 true EP3123816A1 (en) | 2017-02-01 |
EP3123816B1 EP3123816B1 (en) | 2017-12-27 |
Family
ID=52823736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15715445.1A Active EP3123816B1 (en) | 2014-03-24 | 2015-03-19 | Cooking appliance device having a self-controlling bypassing unit |
Country Status (4)
Country | Link |
---|---|
US (1) | US10440783B2 (en) |
EP (1) | EP3123816B1 (en) |
ES (1) | ES2655654T3 (en) |
WO (1) | WO2015145309A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2633458B1 (en) * | 2016-03-21 | 2018-06-27 | Bsh Electrodomésticos España, S.A. | Home appliance protection device |
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2015
- 2015-03-19 US US15/122,937 patent/US10440783B2/en active Active
- 2015-03-19 ES ES15715445.1T patent/ES2655654T3/en active Active
- 2015-03-19 WO PCT/IB2015/052015 patent/WO2015145309A1/en active Application Filing
- 2015-03-19 EP EP15715445.1A patent/EP3123816B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3123816B1 (en) | 2017-12-27 |
ES2655654T3 (en) | 2018-02-21 |
US20170105250A1 (en) | 2017-04-13 |
WO2015145309A1 (en) | 2015-10-01 |
US10440783B2 (en) | 2019-10-08 |
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