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EP2011370A1 - Appareil de transmission inductive d'énergie avec circuit oscillant - Google Patents

Appareil de transmission inductive d'énergie avec circuit oscillant

Info

Publication number
EP2011370A1
EP2011370A1 EP07727212A EP07727212A EP2011370A1 EP 2011370 A1 EP2011370 A1 EP 2011370A1 EP 07727212 A EP07727212 A EP 07727212A EP 07727212 A EP07727212 A EP 07727212A EP 2011370 A1 EP2011370 A1 EP 2011370A1
Authority
EP
European Patent Office
Prior art keywords
transmission
unit
energy
decoupling
oscillation
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.)
Withdrawn
Application number
EP07727212A
Other languages
German (de)
English (en)
Inventor
Thomas Komma
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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2011370A1 publication Critical patent/EP2011370A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/538—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/06—Cook-top or cookware capable of communicating with each other
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the invention relates to a power transmission unit according to the preamble of claim 1.
  • a power transmission unit with a primary side which is provided for inductive transmission of energy to a secondary side which can be separated from the primary side.
  • the energy transmission unit has a primary coil, which is fed with an alternating current.
  • the energy transmission unit is further provided with an inverter. When the alternating current is generated, in addition to a fundamental oscillation, further harmonics are generated, which are likewise transmitted via the alternating field.
  • the object of the invention is, in particular, to further develop the generic energy transfer units, in particular with regard to a high degree of application flexibility.
  • the invention is based on a power transmission unit comprising a primary unit with a transmission means for the wireless transmission of energy to a secondary unit by means of a transmission oscillation and a vibration generating unit for generating the transmission oscillation.
  • the vibration generating unit has a decoupling means, which is provided to decouple at least one of the transmission vibration associated harmonic.
  • a decoupling means which is provided to decouple at least one of the transmission vibration associated harmonic.
  • the secondary unit can be arranged to cooperate with the primary unit in the transmission area.
  • the secondary unit is advantageously separable from the transmission area.
  • the power transmission unit may be e.g. to heat a secondary unit.
  • the secondary unit can be designed as a cookware.
  • the energy transfer unit can be used to supply a secondary unit with electrical energy, which can be used as an electrical consumer, e.g. is designed as an electrical appliance.
  • the secondary unit can be designed as a power supply unit which itself serves to supply an electrical load and draws an electrical voltage from a transmission of the primary unit.
  • the energy transfer unit may advantageously be arranged below a surface, e.g.
  • the secondary unit can be arranged to interact with the primary unit on the surface.
  • a "harmonic" which is associated with the transmission oscillation may, in particular, be understood as an oscillation which has a frequency which is greater than the frequency of the transmission oscillation.
  • the harmonic may be a harmonic of the transmission vibration.
  • a "transmission range" of the transmission medium can be understood to mean a range of the energy transmission that is driven by the transmission medium. In particular, this may be understood as an area within which the secondary unit may preferably receive at least 70%, advantageously at least 90% and particularly advantageously at least 95% of the energy made available by the transmission means.
  • a “decoupling means” for decoupling a vibration may, in particular, be understood as meaning a means for damping the oscillation and / or decoupling the oscillation.
  • a “decoupling means” for decoupling an oscillation can be understood as meaning a means which is provided for at least partial removal of the oscillation from a frequency spectrum.
  • the transmission means is provided for inductive transmission of the energy.
  • the transmission means is preferably formed as a coil.
  • the energy transmission unit is designed as an induction heating device. This can be integrated in an induction heater or even be designed as an induction heater.
  • the secondary unit is preferably designed as a cookware 200501596
  • the induction heating device may have a first heating mode, which is provided for heating a cookware made of a ferromagnetic material.
  • a transmission vibration between e.g. 25 kHz and 50 kHz are generated.
  • the induction heating apparatus may further comprise at least a second heating mode which results in heating of a cookware made of a non-magnetic material, e.g. Aluminum, is suitable. In this case, preferably in order to achieve short heating times, a transmission oscillation having a higher frequency can be generated.
  • a frequency range up to a frequency limit which is predetermined by a safety standard, can be utilized for the generation of the transmission oscillation.
  • a transmission oscillation for transmitting the energy up to a frequency of 150 kHz can be generated.
  • the energy transmission unit can serve to induce a voltage in the secondary unit.
  • this voltage can be used as the operating voltage to operate an electrical consumer connected to the secondary unit.
  • the secondary unit preferably has an inductive receiving element, such as a secondary coil, in which the voltage can be induced.
  • the transmission means of the primary unit and the receiving element of the secondary unit advantageously form a transformer.
  • the decoupling means has an inductance.
  • an advantageous smoothing of a current oscillating with the transmission oscillation can be achieved. This is particularly advantageous when the current swinging with the transmission oscillation is generated by a cycle of switching operations.
  • the transmission means is provided as a transmission inductance for inductive transmission of the energy
  • the inductance of the decoupling means advantageously has a value which is smaller than the value of the transmission inductance.
  • the decoupling means comprise a resonant circuit. This can be done easily, using fewer components 200501596
  • high frequency should be understood in this context in particular a frequency that is greater than a resonant frequency of the resonant circuit. Particularly advantageously, this frequency can be at least a multiple, e.g. be a quadruple of the resonant frequency.
  • the resonant circuit is designed as a series resonant circuit. This allows a particularly simple, inexpensive design of the decoupling means can be achieved.
  • the resonant circuit has at least one decoupling point at which the transmission means is switched on.
  • a decoupling point of the resonant circuit should be understood in particular to be a point of the resonant circuit at which a branch can be switched, high frequencies being decoupled in this branch.
  • the resonant circuit can have at least two decoupling points, which delimit a section of the resonant circuit and between which a branch can be connected in parallel to the section.
  • the transmission means is arranged in the branch.
  • the section represents a short circuit for the high frequencies, whereby these high frequencies in the parallel branch can be decoupled.
  • the resonant circuit has a capacitor and the decoupling point is formed as a capacitor terminal. This makes it possible to achieve a decoupling of high frequencies particularly simply and effectively, since the capacitor represents a particularly low reactance for these high frequencies.
  • the capacitor may constitute a short circuit for the high frequencies.
  • the vibration generating unit preferably has a bridge circuit with a bridge topology. As a result, an existing vibration generating unit with 200501596
  • the bridge circuit may have a half-bridge topology, with only one bridge side comprising switching means for generating an alternating current.
  • the bridge circuit may have a bridge topology, with switching means arranged on two bridge sides.
  • the switching means preferably comprise switching transistors, e.g. as FET
  • Transistors field effect transistor
  • IGBT Insulated Gate Bipolar Transistor
  • the decoupling means can be manufactured with little effort by adapting an existing topology of the vibration generating unit when the decoupling means is connected in a bridge branch of the bridge circuit.
  • the vibration generating unit is designed as a power converter.
  • the power converter is designed as an inverter.
  • FIG. 1 shows an induction heater with a power transmission unit, which has a transmission means, and a pot
  • FIG. 2 shows a vibration generating unit of the power transmission unit with the transmission means and a decoupling means
  • Fig. 3 shows the time course of an alternating current flowing through the transmission means
  • FIG. 1 shows a kitchen worktop 10 with a hob 12, in which an induction heater 14 is integrated.
  • the induction heater 14 has a housing 16 with an upper plate 18 and an energy transfer unit 20, which comprises a primary unit 22 with a control unit 24, a transmission means 26, a Schwingungserzeu- generating unit 28, a detection unit 30 and a control element 32.
  • the operating element 32 is arranged on the front side of the housing 16 and serves for switching on and off the induction heater 14 and for regulating a heating temperature.
  • the transmission element 26 is embodied as a coil and is provided to inductively transmit an energy to a secondary unit 36 arranged in the transmission region 34 within a transmission region 34 drawn on the upper plate 18.
  • the secondary unit 36 is formed as a pot.
  • the transfer region 34 is drawn by a line 37 on the upper plate 18.
  • an alternating current 38 (FIG. 2) is fed into the transmission means 26 by the vibration generating unit 28, which is designed as an inverter.
  • the alternating current 38 has a transmission oscillation f (FIG. 3), so that an alternating magnetic field with the transmission oscillation f is generated by the transmission means 26.
  • the alternating current 38 is generated by switching operations in the vibration generating unit 28 which are controlled by the control unit 24.
  • the alternating field generates eddy currents in the bottom of the pot-formed secondary unit 36 by magnetic induction. The bottom is thereby heated to heat a pot (not shown) in the pot.
  • the secondary unit 36 formed as a pot is made of a ferromagnetic material.
  • the penetration depth of the alternating field generated by the transmission means 26 into the ferromagnetic material corresponds to the thickness of the bottom of the secondary unit 36, so that optimum heating of the food and in particular a short cooking time can be achieved.
  • the pot is made of an amagnetic material, eg aluminum.
  • Part of the transferred energy in the soil can be converted into heat.
  • the placement of the secondary unit 36 made of aluminum is detected by the detection unit 30, which transmits a detection signal to the control unit 24.
  • a transmission oscillation f 100 kHz.
  • higher frequencies up to a limit of 150 kHz are conceivable.
  • This limit is prescribed by the safety standard EMC EN55022.
  • This standard can be complied with during operation in the second heating mode in particular in that the energy transmission unit 20 is provided with a decoupling means 40 ( Figure 2), which is intended to decouple the harmonic content of the transmission oscillation f.
  • FIG. 2 shows a schematic representation of an internal circuit of the primary unit 22.
  • the transmission means 26 embodied as a coil, the oscillation generating unit 28 and the control unit 24 for controlling the oscillation generating unit 28 can be recognized.
  • the secondary unit 36 is also shown schematically.
  • An ohmic resistance represents the ohmic resistance of the bottom of the secondary unit 36, while an inductance represents the inductance of this bottom.
  • the secondary unit 36 is separable from the transmission region 34 of the transmission means 26, which is indicated by an arrow.
  • the upper plate 18 is shown by a dashed line.
  • the transmission area 34 of the transmission means 26 is also shown by a dashed line.
  • the vibration generating unit 28 is formed as an inverter. It has two lines 42, between which a DC voltage V is applied. For this purpose, the lines 42 are connected to a rectifier (not shown), which rectifies an AC voltage of a mains power supply to the DC voltage V. Between the lines 42, the vibration generating unit 28 has a bridge circuit 44. This bridge circuit 44 has two bridge sides 46, 48, which are connected by a bridge branch 50. The first bridge side 46 has two capacitors 52, which serve to stabilize the DC voltage V.
  • the second bridge 48 includes two switching means 54, each having a transistor 56 and a freewheeling diode 58. The freewheeling diodes 58 are each connected in parallel with one of the transistors 56.
  • the transistors 56 are each formed as a FET transistor (field effect transistor). Alternatively, IGBT (Insulated Gate Bipolar Transistor) can be used. A 200501596
  • the transmission vibration f is generated by switching operations of the switching means 54, which are controlled by the control unit 24.
  • the operating principle of an inverter for generating an alternating current is known and will not be explained in detail in the context of this description.
  • the vibration generating unit 28 has the decoupling means 40. This is connected in the bridge branch 50.
  • the decoupling means 40 is in the form of a series resonant circuit with a capacitor C and an inductance L as a resonant circuit 60 (shown in dashed lines in the figure).
  • the inductance L has a value which is smaller than the inductance of the transmission means 26.
  • the inductance L has a value which is, for example, 10 times smaller than the inductance of the transmission means 26.
  • the inductive resistance of the inductance L for this frequency increases, while the capacitance of the capacitor C decreases.
  • the capacitor C can be considered as a short circuit for these high frequencies. Consequently, the terminals of the capacitor C form two decoupling points 62, between which a current signal can be taken, in which these high frequencies are decoupled.
  • the harmonics of this transmission frequency f at 300 kHz, 375 kHz, etc. become one at the decoupling points 62 disconnected functional component decoupled.
  • the transmission means 26 is connected to the decoupling points 62 of the resonant circuit 60. Consequently, through the transmission means 26 flows an alternating current 38, which has the transmission oscillation f and in which the harmonics of the transmission oscillation f are decoupled. This can be seen in FIGS. 3 and 4.
  • FIG. 3 shows the profile of the alternating current 38 flowing through the transmission means 26 as a function of the time t over a period of time.
  • the current amplitude I of the alternating current 38 in amperes is plotted on the y-axis. As the figure can be seen, the 200501596
  • FIG. 4 shows a frequency spectrum which results from a Fourier analysis of the alternating current 38. Channels are plotted on the x-axis, one channel of a harmonic corresponding to the transmission frequency f. On the y-axis a proportion in percent of the total current amplitude I is plotted. As can be seen in the figure, the alternating current 38 has only one component which corresponds to the transmission oscillation f. The harmonic content of the alternating current 38 is decoupled by the decoupling means 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Inverter Devices (AREA)
  • General Induction Heating (AREA)

Abstract

L'invention concerne une unité de transmission d'énergie comprenant une unité (22) primaire avec un moyen (26) de transmission pour la transmission sans fil d'une énergie à une unité (36) secondaire au moyen d'une oscillation (f) et une unité (28) génératrice d'oscillations pour générer l'oscillation (f) de transmission. Pour atteindre une souplesse d'utilisation élevée, il est proposé que l'unité (28) génératrice d'oscillations présente un moyen (40) de découplage qui est prévu pour découpler au moins une oscillation harmonique associée à l'oscillation (f) de transmission.
EP07727212A 2006-04-18 2007-03-22 Appareil de transmission inductive d'énergie avec circuit oscillant Withdrawn EP2011370A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006017802A DE102006017802A1 (de) 2006-04-18 2006-04-18 Energieübertragungseinheit
PCT/EP2007/052736 WO2007122050A1 (fr) 2006-04-18 2007-03-22 Appareil de transmission inductive d'énergie avec circuit oscillant

Publications (1)

Publication Number Publication Date
EP2011370A1 true EP2011370A1 (fr) 2009-01-07

Family

ID=38267643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727212A Withdrawn EP2011370A1 (fr) 2006-04-18 2007-03-22 Appareil de transmission inductive d'énergie avec circuit oscillant

Country Status (5)

Country Link
US (1) US20090057298A1 (fr)
EP (1) EP2011370A1 (fr)
CN (1) CN101422077A (fr)
DE (1) DE102006017802A1 (fr)
WO (1) WO2007122050A1 (fr)

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ES2353890B1 (es) * 2008-12-19 2012-01-26 Bsh Electrodomesticos España, S.A. Campo de cocción con al menos tres zonas de calentamiento.
DE102009027403A1 (de) 2009-07-01 2011-01-05 BSH Bosch und Siemens Hausgeräte GmbH Elektrisch betreibbares Küchen-Aufsatzgerät, Satz aus mehreren solchen Geräten und Arbeitsplatte
DE102009047593B4 (de) 2009-12-07 2024-11-28 BSH Hausgeräte GmbH Haushaltsgerätesystem
DE102009055147A1 (de) 2009-12-22 2011-06-30 BSH Bosch und Siemens Hausgeräte GmbH, 81739 Energieübertragungseinheit und Verfahren zum Konfigurieren einer Anzeigeeinheit einer Energieübertragungseinheit
CN107045928B (zh) * 2011-05-31 2020-04-24 苹果公司 合并来自谐振磁电力系统中的多个谐振磁接收器的电力
DE102011079689B4 (de) 2011-07-22 2014-07-03 E.G.O. Elektro-Gerätebau GmbH Temperaturmessung im Kochgefäß
EP2595294A1 (fr) * 2011-11-17 2013-05-22 Lite-On It Corporation Système et appareil de charge sans fil et son procédé de commande
KR20140109921A (ko) * 2012-01-08 2014-09-16 액세스 비지니스 그룹 인터내셔날 엘엘씨 유도 쿠킹 시스템
US20150312969A1 (en) * 2012-11-14 2015-10-29 Arcelik Anonim Sirketi A food preparation appliance operated on an induction heating cooktop
US11609121B2 (en) * 2018-05-18 2023-03-21 Hatco Corporation Sensor and control systems for food preparation
US11483903B2 (en) 2018-05-18 2022-10-25 Hatco Corporation Multi-coil induction warming system
US11582837B2 (en) 2018-05-18 2023-02-14 Hateo Corporation Temperature-regulating appliance with removable base
KR102880412B1 (ko) * 2020-04-02 2025-11-04 엘지전자 주식회사 박막의 유도 가열을 이용하여 물체를 가열하는 유도 가열 방식의 쿡탑
KR20220115364A (ko) * 2021-02-10 2022-08-17 엘지전자 주식회사 유도 가열 장치 및 유도 가열 장치의 제어 방법

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US3761668A (en) * 1972-03-01 1973-09-25 Gen Electric Small electrical apparatus powered by induction cooking appliances
DE2901326A1 (de) * 1979-01-15 1980-07-24 Sachs Systemtechnik Gmbh Sinusleistungsgenerator
JP3247328B2 (ja) * 1997-12-09 2002-01-15 浩 坂本 非接触電力伝達装置
JP3743193B2 (ja) * 1999-02-23 2006-02-08 松下電工株式会社 非接触電力伝達装置
GB2350733B (en) * 1999-06-03 2003-02-12 Cheltenham Induction Heating L Power supply
KR100915416B1 (ko) * 2002-03-19 2009-09-03 파나소닉 주식회사 유도 가열장치
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Also Published As

Publication number Publication date
DE102006017802A1 (de) 2007-11-15
WO2007122050A1 (fr) 2007-11-01
US20090057298A1 (en) 2009-03-05
CN101422077A (zh) 2009-04-29

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