WO2013144765A1 - Dispositif de chauffage par induction - Google Patents

Dispositif de chauffage par induction Download PDF

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Publication number
WO2013144765A1
WO2013144765A1 PCT/IB2013/052084 IB2013052084W WO2013144765A1 WO 2013144765 A1 WO2013144765 A1 WO 2013144765A1 IB 2013052084 W IB2013052084 W IB 2013052084W WO 2013144765 A1 WO2013144765 A1 WO 2013144765A1
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WO
WIPO (PCT)
Prior art keywords
heating
unit
current sensor
sensor unit
current
Prior art date
Application number
PCT/IB2013/052084
Other languages
German (de)
English (en)
Inventor
Daniel Anton Falcon
Carlos CALVO MESTRE
Pablo Jesus Hernandez Blasco
Sergio Llorente Gil
Daniel Palacios Tomas
Ramon Peinado Adiego
Diego Puyal Puente
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP13721073.8A priority Critical patent/EP2832182B1/fr
Publication of WO2013144765A1 publication Critical patent/WO2013144765A1/fr

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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
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils

Definitions

  • the invention is based on an induction heating device according to the preamble of claim 1.
  • an induction hob which comprises an induction heating device with two heating frequency units and four heating inductors. Between the Schufrequenzajien and the Schuinduktoren a switching unit is arranged, which is intended to assign the Schuinduktoren the Schufrequenzüen.
  • the induction heater further comprises four identical current sensor units which are connected in series with the heating inductors.
  • the object of the invention is, in particular, to optimize a generic Indulementswvoroplasty advantageous.
  • the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
  • the first current sensor unit and the second current sensor unit are of different types.
  • the two current sensor units are formed differently by a current sensor unit integrated in a power supply unit. "Intended” is especially intended to grammed and / or designed and / or equipped understood.
  • heating inductor is to be understood in particular a heating element with at least one induction heating, which is provided by induction effects, in particular by an induction of electric current and / or by Ummagnetleitersemble, in a, preferably ferromagnetic, in particular metallic, heating means, In particular, in a cooking utensil, in an oven wall and / or in a radiator, which is arranged in an oven, to cause heating of the heating means.
  • the induction heating is intended, in at least one operating mode in which the induction heating to a supply electronics, in particular the Schufrequenzaise, is connected to a power of at least 100 W, in particular of at least 500 W, preferably of at least 1000 W and particularly advantageous to transmit at least 2000 W, in particular to convert electrical energy into electromagnetic field energy ln, which is finally converted into heat in a suitable heating medium.
  • heating frequency unit is to be understood in this context, in particular an electrical unit, which is an oscillating electrical signal, preferably at a frequency of at least 1 kHz, in particular at least 5 kHz, preferably at least 10 kHz, more preferably at least 15 kHz and
  • the heating frequency unit is intended to provide a maximum electrical power required by the heating inductor of at least 1000 W, in particular of at least 1500 W, preferably of at least 2000 W and particularly advantageously of at least 2500 W.
  • Heating frequency unit comprises in particular at least one inverter, preferably at least two, preferably in series, bidirectional unipolar switches, which are formed in particular by a transistor and a diode connected in parallel, and particularly advantageous at least in each case s a damping capacitance connected in parallel to the bidirectional unipolar switches, which in particular is formed by at least one capacitor. det is.
  • the heating frequency unit is supplied by a rectifier unit with a rectified alternating current.
  • a “resonance capacitor unit” is to be understood in particular as meaning a unit which has at least one resonance capacitor in at least one operating state with a frequency of at least 1 kHz, in particular of at least 5 kHz, preferably of at least 10 kHz and particularly advantageously of at least 15 kHz is alternately charged and discharged, in particular in a predetermined by the heating frequency unit clock.
  • a "resonant circuit” is to be understood in particular as meaning a circuit and preferably an ac circuit which has at least one heating inductor and preferably a resonant capacitor of the resonant capacitor unit and in which in at least one operating state high-frequency alternating current with a frequency of at least 1 kHz, in particular of at least 5 kHz, preferably of at least 10 kHz and particularly advantageously of at least 15 kHz flows
  • the current sensor units are arranged on a side facing away from the rectifier unit side of the Schufrequenzillon viewed circuitry.
  • a "heating current characteristic” is to be understood in particular as a variable characterizing the heating current, in particular a voltage drop and preferably an induction voltage, whereby the current sensor units are provided for measuring at least one heating current characteristic Current sensor units are provided to detect a presence and / or a nonexistence of the heating current.
  • accuracy should in this context be understood in particular as a collective term for an example. precision and / or correctness.
  • a “precision” is to be understood as meaning in particular a quantitative measure for a scattering of measured values of several measurements of an electric current about an average value of the measured values.
  • “Correctness” in this context should in particular be a quantitative measure for a deviation of an average value of several measured values from measurements of an electric current from the true value of the electric current.
  • switching unit is to be understood as meaning in particular a unit which comprises at least one switching element with preferably at least three electrical connections
  • the switching element is designed as a changeover switch which opens at least one first circuit during a switching operation and closes a second electrical circuit.
  • the first current sensor unit has an at least substantially higher accuracy than the second current sensor unit.
  • An "at least much higher accuracy” is to be understood in particular as meaning an at least substantially higher precision and / or an at least significantly higher accuracy.
  • "At least substantially higher precision” is intended in particular to mean at least 20%, in particular at least 40%, preferably At least 60% and particularly advantageously at least 80% smaller scattering of measured values of a plurality of measurements of an electric current about an average of the measured values are understood.
  • at least much higher accuracy should in particular a by at least 20%, in particular by at least 40%, preferably at least 60% and particularly advantageous order at least 80% less deviation of an average of several measurements from measurements of an electric current from the true value of the electric current.
  • only the first current sensor unit is provided for this purpose and in particular suitable for carrying out a precise measurement of a time profile of the heating current for an estimation of a heating power and / or an effective value of the heating current. This can reduce costs.
  • the first current sensor unit is provided in at least one operating state to measure a total current supplied by the heating frequency unit.
  • an advantageous hob control can be realized.
  • overstressing and in particular overheating of the heating frequency unit can be avoided.
  • the induction heating device comprises at least one switching unit, which is provided in at least one operating state to assign the heating frequency unit one of the heating inductors.
  • a number of heating frequency units can be advantageously reduced compared to a number of heating inductors, which in particular can save costs.
  • space can be saved and a cooling unit for cooling the heating frequency units can be made smaller.
  • a time-division multiplexing method in which certain heating inductors are periodically supplied with energy by certain heating-frequency units, an advantageously high operating comfort can still be achieved.
  • the first current sensor unit is arranged in terms of circuitry between the heating frequency unit and the first switching unit.
  • a first unit is "arranged in terms of circuitry between a second and a third unit"
  • at least one current path exists from the second unit to the third unit, which in particular depends on a masthead unit. is different and in which the first unit is arranged.
  • a measurement of a total current supplied by the heating frequency unit can be made particularly advantageous.
  • the first current sensor unit is arranged in terms of circuitry between one of the heating inductors and the resonance capacitor unit and, in terms of circuitry, immediately adjacent to the resonance capacitor unit.
  • a first unit is arranged "in terms of circuit technology immediately adjacent to a second unit should in particular mean that, in particular, between the first unit and the second unit only electrical conductors and components with an electrical resistance of at most 50 ⁇ , in particular of a maximum of 10 ⁇ , preferably of at most 5 ⁇ , and particularly advantageously of at most 1 ⁇ are arranged, and in particular that a current path from the first unit to the second unit is unbranched, thereby enabling further advantageous control variants.
  • the second current sensor unit is at least provided to determine a presence of the current through one of the heating inductors.
  • the second current sensor unit is arranged in circuit technology directly adjacent to one of the heating inductors.
  • the second current sensor unit is formed so simple that it is only suitable for detecting the presence of the current. As a result, costs can be reduced particularly advantageous.
  • the induction heating device comprises at least three connection points, which are intended to be connected to at least two outer conductors and at least one neutral conductor of a power supply network.
  • the second current sensor unit comprises at least one conductor loop, which is provided to measure the Schustromkenniere inductively.
  • a conductor loop is meant in particular a shaping of at least one electrical conductor to be understood which preferably has at least one corner and / or at least one bend.
  • a "electrical conductor” is intended in particular an electrically conductive member having an electrical resistance of at most 10 " 6 square meters, in particular of maximum
  • the conductor loop is arranged on a circuit board and particularly advantageously on both upper sides of the circuit board In this way, a particularly cost-effective second current sensor unit can be provided, Furthermore, galvanic isolation can advantageously be achieved.
  • FIG. 2 is a circuit diagram of the induction heater of FIG. 1 including first and second current sensor units.
  • FIG. 3a shows a part of the second current sensor unit of FIG. 2 in a schematic representation
  • Fig. 3b shows the part of the second current sensor unit of Fig. 3a in one
  • Fig. 5a shows a part of a further second current sensor unit in one
  • Fig. 5b shows the part of the second current sensor unit in a mounted
  • FIG. 6 shows a circuit diagram of a further induction heating device with a first and a second current sensor unit, wherein the first current sensor unit is arranged at a first position
  • FIG. 7 shows a circuit diagram of a further induction heating device with a first and a second current sensor unit, wherein the first current sensor unit is arranged at a second position, and
  • FIG. 8 is a diagram of a generalized induction heating apparatus.
  • FIG. 1 shows a cooking appliance designed as an induction hob 54a in a plan view.
  • the induction hob 54a includes a cooktop panel 56a.
  • the cooktop panel 56a is made of a glass ceramic.
  • the hob plate 56a is arranged horizontally and provided for setting up cooking utensils (not shown).
  • On the hob plate 56 a four heating zones 58 a, 60 a, 62 a, 64 a are marked in a known manner.
  • the induction hob 54a comprises an induction heating device for heating the heating zones 58a, 60a, 62a, 64a.
  • FIG 2 shows a circuit diagram of the induction heater of Figure 1.
  • the induction heater has below the hob plate 56a four heating inductors 10a, 12a, 14a, 16a, wherein each of the heating inductors 10a, 12a, 14a, 16a a the heating zones 58a, 60a, 62a, 64a is assigned.
  • the heating device has two heating frequency units 18a, 20a, by means of which the heating inductors 10a, 12a, 14a, 16a can be supplied with high-frequency alternating current.
  • the two heating frequency units 18a, 20a each include an inverter 66a, 68a.
  • the inverter 66a includes a first insulated gate bipolar transistor (hereinafter abbreviated as "IGBT") 70a and a second IGBT 72a connected in series with the first IGBT 70a Alternatively, instead of the IGBTs, any other switching unit that appears appropriate to those skilled in the art may be used, but preferably a bidirectional unipolar switch Have damping capacitor.
  • IGBT insulated gate bipolar transistor
  • the induction heating device is intended to be connected via connection points 42a, 44a, 46a to two outer conductors 48a, 50a and a neutral conductor 52a of a country-specific power supply network. Between one of the outer conductors 48a, 50a and the neutral conductor 52a is in each case an electrical voltage with a frequency of 50 Hz and an effective value of 230 V at.
  • the induction heating device described is intended in particular for operation in Germany.
  • the voltage tapped between the outer conductor 48a and the neutral conductor 52a is filtered in one operating state by a rectifier unit 78a and rectified, and then supplied to the heating frequency unit 18a.
  • the voltage tapped between the outer conductor 50a and the neutral conductor 52a is filtered and rectified in an operating state by a rectifier unit 80a, and then supplied to the heating frequency unit 20a.
  • a rectified voltage is applied to an output of the rectifier unit 78a, which is applied between a collector of the IGBT 70a and an emitter of the IGBT 72a.
  • a rectified voltage is output at an output of the rectifier unit 80a. which is applied between a collector of the IGBT 74a and an emitter of the IGBT 76a.
  • the induction heating device has a switching unit 38a.
  • the switching unit 38a comprises four switching elements 82a, 84a, 86a, 88a.
  • the switching elements 82a, 84a, 86a, 88a are identical.
  • the switching elements 82a, 84a, 86a, 88a are SPDT relays.
  • Each of the switching elements 82a, 84a, 86a, 88a has first, second and third contacts.
  • the first contact can be conductively connected to the second or the third contact by means of a corresponding activation.
  • the first contact of the switching element 82a is conductively connected via a line 89a to an emitter of the IGBT 70a.
  • the second contact of the switching element 82a is conductively connected to the first contact of the switching element 84a.
  • the third contact of the switching element 82a is conductively connected via a line 90a to a first contact of the heating inductor 14a.
  • the second contact of the switching element 84a is conductively connected via a line 92a to a first contact of the heating inductor 10a.
  • the third contact of the switching element 84a is conductively connected via a line 94a to a first contact of the heating inductor 12a.
  • the first contact of the switching element 86a is conductively connected via a line 95a to an emitter of the IGBT 74a.
  • the second contact of the switching element 86a is conductively connected via the line 94a to the first contact of the heating inductor 12a.
  • the third contact of the switching element 86a is connected to the first contact of the switching element 88a.
  • the second contact of the switching element 88a is conductively connected via the line 90a to the first contact of the heating inductor 14a.
  • the third contact of the switching element 84a is conductively connected via a line 96a to a first contact of the heating inductor 16a.
  • the induction heating apparatus further includes two resonance capacitor units 22a, 24a.
  • the resonant capacitor unit 22a comprises two series-connected resonant capacitors 98a, 100a.
  • the resonant capacitor unit 24a comprises two series-connected resonant capacitors 102a, 104a.
  • a first contact of the resonant capacitor 98a is conductively connected to the collector of the IGBT 70a.
  • a second contact of the resonance capacitor 98a is conductively connected to a second contact of the heating inductor 10a.
  • a first contact of the resonance capacitor 100a is conductively connected to the second contact of the resonance capacitor 98a.
  • a second contact of the resonance capacitor 100a is conductively connected to the emitter of the IGBT 72a.
  • a first contact of the resonant capacitor 102a is conductively connected to the collector of the IGBT 74a.
  • a second contact of the resonant capacitor 102a is conductively connected to a second contact of the heating inductor 16a.
  • a first contact of the resonant capacitor 104a is conductively connected to the second contact of the resonant capacitor 102a.
  • a second contact of the resonant capacitor 104a is conductively connected to the emitter of the IGBT 76a.
  • the induction heating device has a further switching unit 106a.
  • the switching unit 106a comprises two switching elements 108a, 110a.
  • the switching elements 108a, 110a are identical to the switching elements 82a, 84a, 86a, 88a.
  • the first contact of the switching element 108a is conductively connected to a second contact of the heating inductor 12a.
  • the second contact of the switching element 108a is conductively connected to the second contact of the heating inductor 10a.
  • the third contact of the switching element 108a is conductively connected to the second contact of the heating inductor 16a.
  • the first contact of the switching element 1 10a is conductively connected to a second contact of the heating inductor 14a.
  • the second contact of the switching element 110a is conductively connected to the second contact of the heating inductor 10a.
  • the third contact of the switching element 1 10a is conductively connected to the second contact of the heating inductor 16a.
  • the induction heating device comprises two first current sensor units 26a, 28a, which measure a heating current supplied by the heating frequency units 18a, 20a, wherein a control unit, not shown, of the induction hob 54a uses this information in a known manner to control and / or regulate the heating frequency units 18a, 20a.
  • the first current sensor unit 26a measures the heating current flowing through the line 89a.
  • the first current sensor unit 28a measures the heating current flowing through the line 95a.
  • the first current sensor units 26a, 28a respectively measure a total heating current supplied by the respective heating frequency unit 18a, 20a.
  • the first current sensor units 26a, 28a are each arranged in a resonant circuit.
  • the first current sensor units 26a, 28a measure the heating current in each case by electromagnetic induction in a conductor loop, whereby a galvanic separation can be achieved directly.
  • the first current sensor units 26a, 28a are specially designed for measuring the high-frequency heating current and have a correspondingly high accuracy in the frequency range between 20 kHz and 100 kHz.
  • an assignment of the heating frequency units 18a, 20a to the heating inductors 10a, 12a, 14a, 16a can be made by the control unit.
  • an allocation of the resonance capacitor units 22a, 24a to the heating inductors 10a, 12a, 14a, 16a can be made by the control unit.
  • second current sensor units 30a, 32a, 34a, 36a are provided, which detect at least one presence of the heating current in the lines 90a, 92a, 94a, 96a.
  • the second current sensor units 30a, 32a, 34a, 36a are respectively arranged in the immediate vicinity of the heating inductors 10a, 12a, 14a, 16a and thus in resonant circuits.
  • the second current sensor units 30a, 32a, 34a, 36a also operate on the principle of electromagnetic radiation. table induction, whereby also a galvanic separation can be achieved.
  • the first current sensor units 26a, 28a and the second current sensor units 30a, 32a, 34a, 36a are of different types.
  • the first current sensor units 26a, 28a each have at least substantially higher accuracy than the second current sensor units 30a, 32a, 34a, 36a.
  • the second current sensor units 30a, 32a, 34a, 36a can be designed such that they are only suitable for determining the presence of the heating current in the relevant line 90a, 92a, 94a, 96a.
  • control unit determines whether current is flowing only through those lines 90a, 92a, 94a, 96a through which current should actually flow. If an unexpected current flow occurs in one of the lines 90a, 92a, 94a, 96a, this is an indication of a malposition of the switching unit 38a. When such a malposition occurs, the control unit causes at least a shutdown of the heating frequency units 18a, 20a and optionally an output of an error message and / or a maintenance request.
  • any current-current sensor units which appear reasonable to the person skilled in the art are possible, in particular those shown in FIGS. 3a, 3b, 4, 5a and 5b.
  • the second current sensor units 30a-c, 32a-c, 34a-c, 36a-c shown here have in common that they each comprise a conductor loop 40a-c, which is provided to inductively measure the heating current.
  • FIG. 3 a shows a part of the second current sensor unit 30 a in a schematic representation. Corresponding parts of the second current sensor units 32a, 34a, 36a are constructed identically.
  • the conductor loop 40a of the current sensor unit 30a is mounted on a board 136a.
  • the conductor loop 40a extends partially on an upper side 138a and partly on an underside 140a of the board 136a. Parts of the conductor loop 40a, which run on the underside 140a of the board 136a, are shown in dashed lines in FIGS. 3a and 3b.
  • Through ducts 142a of which only one is designated in each case in FIGS.
  • the parts of the conductor loop 40a are through the board 136a is conductively connected from the top 138a to the bottom 140a.
  • the conductor loop 40a has at least substantially a cuboid outer contour and, together with the feedthroughs 142a, forms a coil whose coil surface is oriented perpendicular to the printed circuit board 136a.
  • FIG. 3b shows a schematic representation of the second current sensor unit 30a in an assembled state.
  • the line 92a which is electrically insulated from an environment, is guided along the top side 138a of the board 136a and at least substantially parallel to the coil surface.
  • a voltage proportional to the time change of the heating current is induced in the conductor loop 40a by the high-frequency heating current in the line 92a.
  • a suitable measuring circuit not shown
  • the presence of the heating current in the line 92a can thus be detected.
  • even a frequency of the heating current can be determined, whereby an association with one of the heating frequency units 18a, 20a can be made possible, namely the heating frequency unit 18a, 20a, which is operated at the same frequency.
  • FIGS. 4, 5a, 5b, 6, 7 and 8 show five further exemplary embodiments of the invention.
  • the following descriptions are essentially limited to the differences between the exemplary embodiments, reference being made to the description of the other exemplary embodiments, in particular FIGS. 1, 2, 3a and 3b, with regard to components, features and functions remaining the same.
  • FIGS. 1, 2, 3a and 3b To distinguish the embodiments of the letter a in the reference numerals of the embodiment in Figures 1, 2, 3a and 3b by the letters b to f in the reference numerals of the embodiments of Figures 4, 5a, 5b, 6, 7 and 8 is replaced.
  • FIG. 4 shows a part of a further second current sensor unit 30b in a schematic representation.
  • the conductor loop 40b of the current sensor unit 30b is also mounted on a board 136b.
  • components which are arranged along an underside 140b of the board 136b are also shown in dashed lines in FIG.
  • the present embodiment differs from the previous exemplary embodiment only in that a return line 144b coming from a heating inductor 10b and insulated from an environment is additionally arranged in antiparallel to a line 92b leading to the heating inductor 10b, so that a heating current flows in anti-parallel.
  • the line 92b is guided along an upper side 138b of the board 136b and the return line 144b is guided along the lower side 140b.
  • Both the line 92b and the return line 144b are aligned at least substantially parallel to a coil surface of a coil formed by the conductor loop 40b and feedthroughs 142b.
  • FIG. 5a shows a part of a further second current sensor unit 30c in a schematic representation.
  • the conductor loop 40c of the current sensor unit 30c is also applied to a board 136c.
  • the conductor loop 40c runs partially on an upper side 138c and partly on an underside 140c of the board 136c.
  • Parts of the conductor loop 40c, which run on the underside 140c of the circuit board 136c, are shown by dashed lines in FIGS. 5a and 5b.
  • Via passages 142c of which only one is designated in FIGS. 5a and 5b for the sake of clarity, the parts of the conductor loop 40c are conductively connected by the board 136c from the top 138c to the bottom 140c.
  • the conductor loop 40c has at least substantially a toroidal outer contour and, together with the feedthroughs 142a, forms a Rogowski coil.
  • a recess 146c is provided in the board 136c.
  • the recess 146c is circular in a vertical view of the board 136c.
  • FIG. 5b shows a schematic representation of the second current sensor unit 30c in a mounted state. A relative to an environment electrically insulated line 92c, which is provided to a power supply of a heating inductor 10c, is guided in the mounted state through the recess 146c.
  • a voltage proportional to the time change of the heating current is induced in the conductor loop 40c by the high-frequency heating current in the line 92c.
  • a suitable measuring circuit (not shown) the presence of the heating current in the line 92c can thus be detected.
  • a frequency of the heating current can also be determined here, whereby an assignment to a heating frequency unit 18c, 20c can be made possible, namely to the heating frequency unit 18c, 20c, which is operated at the same frequency.
  • FIG. 6 shows a circuit diagram of a further induction heating device of an induction hob 54d.
  • the induction heating device is intended to be connected via connection points 42d, 46d to only one outer conductor 48d and one neutral conductor 52d of a country-specific power supply network. Between the outer conductor 48d and the neutral conductor 52d, an electrical voltage with a frequency of 50 Hz and an effective value of 230 V is applied.
  • the induction heating device described is intended in particular for operation in Germany. For an induction heating apparatus intended for US operation, the frequency is 60 Hz and the rms value is 1 10 V.
  • the voltage tapped between the outer conductor 48d and the neutral conductor 52d is filtered and rectified in an operating state by a rectifier unit 78d and then two heating frequency units 18d, 20d supplied in parallel.
  • the heating frequency units 18d, 20d each include an inverter 66d, 68d each having two IGBTs 70d, 72d, 74d, 76d.
  • a rectified voltage is applied, which is applied between a collector of the IGBT 70d and an emitter of the IGBT 72d.
  • the induction heating device has a switching unit 38d.
  • the switching unit 38da comprises six switching elements 82d, 84d, 86d, 88d, 108d, 11d.
  • the switching elements 82d, 84d, 86d, 88d are identical.
  • the switching elements 82d, 84d, 86d, 88d are SPDT relays.
  • Each of the switching elements 82d, 84d, 86d, 88d, 108d, 11d has first, second, and third contacts and a coil.
  • the first contact can be conductively connected to the second or the third contact by means of a corresponding activation.
  • the first contact of the switching element 82d is conductively connected via a line 89d to an emitter of the IGBT 70d.
  • the second contact of the switching element 82d is connected to the first contact of the switching element 84d.
  • the third contact of the switching element 82d is conductively connected to the first contact of the switching element 86d.
  • the second contact of the switching element 84d is conductively connected via a line 92d to a first contact of a heating inductor 10d.
  • the third contact of the switching element 84d is conductively connected via a line 94d to a first contact of a heating inductor 12d.
  • the second contact of the switching element 86d is conductively connected via a line 90d to a first contact of a heating inductor 14d.
  • the third contact of the switching element 86d is conductively connected via a line 96d to a first contact of a heating inductor 16d.
  • the first contact of the switching element 88d is conductively connected via a line 95d to an emitter of the IGBT 74d.
  • the second contact of the switching element 88d is connected to the first contact of the switching element 110d.
  • the third contact of the switching element 82d is conductively connected to the first contact of the switching element 108d.
  • the second contact of the switching element 110d is conductively connected via the line 92d to the first contact of the heating inductor 10d.
  • the third contact of the switching element 1 10d is conductively connected via the line 94d to the first contact of the heating inductor 12d.
  • the second contact of the switching element 108d is conductively connected via the line 90d to the first contact of the heating inductor 14d.
  • the third contact of the switching element 108d is conductively connected via the line 96d to the first contact of the heating inductor 16d.
  • the induction heating apparatus further includes two resonance capacitor units 22d, 24d.
  • the resonant capacitor unit 22d comprises two series-connected resonant capacitors 98d, 100d.
  • the resonant capacitor unit 24d comprises two series-connected resonant capacitors 102d, 104d.
  • a first contact of the resonance capacitor 98d is conductively connected to the collector of the IGBT 70d and the collector of the IGBT 74d.
  • a second contact of the resonant capacitor 98d is conductively connected to a second contact of the heating inductor 10d and a second contact of the heating inductor 12d.
  • a first contact of the resonant capacitor 100d is conductively connected to the second contact of the resonant capacitor 98d.
  • a second contact of the resonance capacitor 100d is conductively connected to the emitter of the IGBT 72d and the emitter of the IGBT 76d.
  • a first contact of the resonance capacitor 102d is conductively connected to the collector of the IGBT 70d and the collector of the IGBT 74d.
  • a second contact of the resonant capacitor 102d is conductively connected to a second contact of the heating inductor 14d and a second contact of the heating inductor 16d.
  • a first contact of the resonant capacitor 104d is conductively connected to the second contact of the resonant capacitor 102d.
  • a second contact of the resonant capacitor 104d is conductively connected to the emitter of the IGBT 72d and the emitter of the IGBT 76d.
  • the induction heater also includes two first current sensor units 26d, 28d, each of which measures a total current supplied by the heating frequency units 18d, 20d in the respective lines 89d, 95d. Furthermore, the induction heating device comprises second current sensor units 30d, 32d, 34d, 36d, which detect at least one presence of the heating current in the lines 90d, 92d, 94d, 96d.
  • the second current sensor units 30d, 32d, 34d, 36d are each arranged in circuit configuration in the immediate vicinity of the heating inductors 10d, 12d, 14d, 16d.
  • any current sensor units that appear reasonable to the person skilled in the art come into question, in particular those shown in FIGS.
  • FIG. 7 shows a circuit diagram of an alternative induction heating device of an induction hob 54e.
  • the present induction heating apparatus is constructed substantially identical to the induction heating apparatus of the embodiment shown in FIG. It differs only in a position of first current sensor units 26e, 28e. In the present exemplary embodiment, these are arranged in terms of circuit technology between heating inductors 10e, 12e, 14e, 16e and resonance capacitor units 22e, 24e and, in terms of circuitry, immediately adjacent to the resonance capacitor units 22e, 24e.
  • the first current sensor unit 26e is arranged between a second terminal of the heating inductor 10e and a second terminal of the heating inductor 12e and a second terminal of a resonance capacitor 98e and a first terminal of a resonance capacitor 100e.
  • the first current sensor unit 28e is arranged between a second terminal of the heating inductor 14e and a second terminal of the heating inductor 16e and a second terminal of a resonance capacitor 102e and a first terminal of a resonance capacitor 104e.
  • This arrangement of the first current sensor units 26e, 28e is preferred when two heating inductors 10e, 12e, 14e, 16e are each operated by their own heating frequency unit 18e, 20e, but on a single common resonant capacitor unit 22e, 24e. In this case, the heating frequency units 18e, 20e are operated at the same frequency, wherein a setting of a heating power of the heating inductors 10e, 12e, 14e, 16e is performed via a relative phase shift.
  • FIG. 8 shows a diagram of an induction heating device of an induction hob 54f.
  • the present induction heater is a generalization of the induction heaters of Figs. 2, 6 and 7.
  • the induction heater is generally provided for connection to one or more outer conductors 48f and to a neutral conductor 52f.
  • the induction heater is described only for an outer conductor 48f. However, the corresponding parts are identical for the other outer conductors.
  • the induction heating Device has a rectifier unit 78f for each outer conductor 48f.
  • the induction heating device comprises one or more heating frequency units 18f, which in the case of a plurality of heating frequency units 18f are supplied with a rectified voltage in parallel by the rectifier unit 78f.
  • An allocation of the heating frequency unit 18f or the heating frequency units 18f to heating inductors 10f, 12f, 14f is possible via a switching unit 38f.
  • a switching unit 38f It should be noted that via phase-spanning lines 1 12f, 1 14f, 1 16f a connection to Schuinduktoren the other outer conductor is possible.
  • Via further switching unit 106f it is possible to associate one or more resonance capacitor units 22f of the induction heating apparatus with the heating inductors 10f, 12f, 14f.
  • phase-overlapping lines 1 18f, 120f, 122f are provided, which allow a connection to heating inductors of the remaining outer conductors.
  • the induction heating device further comprises a control unit 124f, which is provided via a decoupling unit 126f for controlling and / or regulating the heating-frequency units 18f.
  • the decoupling unit 126f provides for a galvanic decoupling.
  • first current sensor units two different sensor positions 128f, 130f per outer conductor 48f are possible, with only one sensor position 128f, 130f being designated for the sake of clarity.
  • the sensor positions 128f are arranged in terms of circuitry between the heating frequency units 18f and the switching units 38f.
  • the sensor positions 130f are circuitry between the switching units 106f and the resonance capacitor units 22f.
  • Two different sensor positions 132f, 134f are provided for the second current sensor units, with only one sensor position 132f, 134f being designated for the sake of clarity.
  • the sensor positions 132f are arranged in terms of circuitry between the switching units 38f and the heating inductors 10f, 12f, 14f.
  • the sensor positions 134f are arranged in terms of circuitry between the heating inductors 10f, 12f, 14f and the switching units 106f. reference numeral

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Induction Heating Cooking Devices (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne un dispositif de chauffage par induction comprenant au moins deux inducteurs de chauffage (10a-f, 12a-f, 14a-f, 16a-e), au moins un module de fréquence de chauffage (18a-f, 20a-e) servant à alimenter les inducteurs de chauffage (10a-f, 12a-f, 14a-f, 16a-e) en courant de chauffage, au moins un module condensateur résonant (22a-f, 24a- e), au moins un premier module détecteur de courant (26a-e, 28a-e) et au moins un second module détecteur de courant (30a-e, 32a-e, 34a-e, 36a-e) respectivement disposés dans au moins un circuit électrique résonant et destinés à mesurer au moins une caractéristique du courant de chauffage. Pour optimiser un dispositif de chauffage par induction de ce genre, le premier module détecteur de courant (26a-e, 28a-e) et le second module détecteur de courant (30a-e, 32a-e, 34a-e, 36a-e) sont de types différents.
PCT/IB2013/052084 2012-03-28 2013-03-15 Dispositif de chauffage par induction WO2013144765A1 (fr)

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ESP201230457 2012-03-28
ES201230457 2012-03-28

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WO2013144765A1 true WO2013144765A1 (fr) 2013-10-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016123646A1 (de) * 2016-12-07 2018-06-07 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Messelektrode für einen kapazitiven Näherungssensor eines Kraftfahrzeugs
US10774575B2 (en) 2015-07-31 2020-09-15 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Control system for a motor-displaceable cargo compartment device of a motor vehicle
US11384589B2 (en) 2011-12-21 2022-07-12 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Control system

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EP1793653A2 (fr) * 2005-12-02 2007-06-06 LG Electronics Inc. Appareil et procédé pour détecter une charge cuisinière électrique
EP2068598A1 (fr) * 2007-12-03 2009-06-10 Samsung Electronics Co., Ltd. Appareil de cuisson chauffant par induction et son procédé de commande
US20110168697A1 (en) * 2009-08-04 2011-07-14 Shun Kazama Electric power converting apparatus and induction heating apparatus
WO2011107328A1 (fr) * 2010-03-03 2011-09-09 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson comprenant au moins une zone de cuisson et procédé permettant de faire fonctionner une plaque de cuisson
WO2011135470A1 (fr) * 2010-04-27 2011-11-03 BSH Bosch und Siemens Hausgeräte GmbH Ensemble table de cuisson

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1793653A2 (fr) * 2005-12-02 2007-06-06 LG Electronics Inc. Appareil et procédé pour détecter une charge cuisinière électrique
EP2068598A1 (fr) * 2007-12-03 2009-06-10 Samsung Electronics Co., Ltd. Appareil de cuisson chauffant par induction et son procédé de commande
US20110168697A1 (en) * 2009-08-04 2011-07-14 Shun Kazama Electric power converting apparatus and induction heating apparatus
WO2011107328A1 (fr) * 2010-03-03 2011-09-09 BSH Bosch und Siemens Hausgeräte GmbH Plaque de cuisson comprenant au moins une zone de cuisson et procédé permettant de faire fonctionner une plaque de cuisson
WO2011135470A1 (fr) * 2010-04-27 2011-11-03 BSH Bosch und Siemens Hausgeräte GmbH Ensemble table de cuisson

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11384589B2 (en) 2011-12-21 2022-07-12 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Control system
US10774575B2 (en) 2015-07-31 2020-09-15 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Control system for a motor-displaceable cargo compartment device of a motor vehicle
DE102016123646A1 (de) * 2016-12-07 2018-06-07 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg Messelektrode für einen kapazitiven Näherungssensor eines Kraftfahrzeugs
CN108169796A (zh) * 2016-12-07 2018-06-15 博泽(班贝格)汽车零部件有限公司 用于机动车的电容式靠近传感器的测量电极

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EP2832182B1 (fr) 2018-11-21

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