WO2017093168A1 - Unité de bobines d'induction - Google Patents

Unité de bobines d'induction Download PDF

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Publication number
WO2017093168A1
WO2017093168A1 PCT/EP2016/078960 EP2016078960W WO2017093168A1 WO 2017093168 A1 WO2017093168 A1 WO 2017093168A1 EP 2016078960 W EP2016078960 W EP 2016078960W WO 2017093168 A1 WO2017093168 A1 WO 2017093168A1
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WO
WIPO (PCT)
Prior art keywords
coils
driven
coil unit
coil
inductive coil
Prior art date
Application number
PCT/EP2016/078960
Other languages
English (en)
Inventor
Hilmi Volkan Demir
Emre UNAL
Erdal GONENDIK
Veli Tayfun KILIC
Namik Yilmaz
Metin OZTURK
Ulas OKTAY
Original Assignee
Arcelik Anonim Sirketi
Innovel Danismanlik Ve Imalat Sanayi Ticaret Limited Sirketi
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 Arcelik Anonim Sirketi, Innovel Danismanlik Ve Imalat Sanayi Ticaret Limited Sirketi filed Critical Arcelik Anonim Sirketi
Publication of WO2017093168A1 publication Critical patent/WO2017093168A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
    • 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
    • H05B6/1245—Cooking devices induction cooking plates or the like and devices to be used in combination with them with special coil arrangements
    • 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
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • 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
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the present invention in particular relates to an inductive coil unit suitable to be used in all-surface induction heating cookers.
  • inductive coils used for wireless power transfer especially for induction heating are known.
  • power is created with the joule effect on the resistance produced as a result of the penetration depth determined by the frequency of the alternative currents of the electromagnetically inducted eddy currents of a coil generating high frequency magnetic field on a conductive metal cooking container (pot, pan etc.) having ferromagnetic features.
  • the desired power adjustment for the suitable cooking container can be realized by changing the frequency of the alternative current.
  • the container desired to be heated has to be electrically conductive and produced from low density carbon steel, cast iron and magnetic inoxidizable materials with ferromagnetic features.
  • a certain number of coils are positioned under a glass surface so as to form the heating surface.
  • the coils are positioned in various configurations.
  • one or more than one coil designed to be one within the other at the regions determined by serigraphy on the glass surface heats a single cooking container.
  • One of the problems encountered in the state of the art is to form coil structures that accommodate best with the cooking container that are produced in very different diameters and shapes and from different materials.
  • Another problem with the state of the art induction heating cookers is the necessity to operate the high power and large diameter coils together with smaller diameter coils in the most efficient manner.
  • the power to be transferred to the cooking container also increases. For example, if the power to be transferred per unit cooking container is desired to be increased then the number of coils also has to be decreased.
  • the position and geometry of the cooking container is desired to be detected on the entire surface, lower amount of power can be provided to small diameter cooking containers since the number of coils has to be decreased this time.
  • One of the most important problems encountered in optimizing these values is the loss generated in the coils especially by high powers and thermal management.
  • induction heating cookers wherein the all surface is heated
  • the efficiency of the cooker decreases and the cooking container thereon can be heated by consuming more power.
  • electrical elements resistant to more current are used in the power circuit and thus production costs increase.
  • induction heating cookers are produced wherein the distance between the coils is longer and/or the geometry of the coils is circular so that the coils affect one another less.
  • the coils are formed in circular shape so that the effect of coils on one another that operate side by side at the same time is decreased, providing minimum adjacent side length.
  • the aim of the present invention is the realization of an inductive coil unit suitable to be used in induction heating cookers, especially in all-surface induction cookers.
  • the inductive coil unit realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a plurality of coils that are adjacent to one another, that are driven by electric current in the same frequency and that magnetically interact with each other, and at least one of the coils is driven by an electrically different phase than the other adjacent coil.
  • At least two adjacent coils are driven by two separate power sources that apply current in 180° different phases or by a single power source.
  • the inductive coil unit comprises at least four coils that have windings with quadrilateral shape with rounded corners wherein each one is driven by a current in 180° different phase than the adjacent coil.
  • the coils are arranged on the top plate plane of the induction heating cooker, in alignment on two axes that are vertical to one another, so as to cover the entire top plate surface and the adjacent coils are driven with 180° phase difference.
  • each coil array on the top plate of the induction heating cooker is driven by a separate power source .
  • the coils are arranged on the top plate plane of the induction heating cooker, with their centers to be three cornered – trigonal, and the coils are driven respectively by 0°, 180° and 120° electrical phase difference and preferably by separate power sources.
  • the inductive coil unit comprises the coils that surround a center coil driven by a current with 120° phase difference and that are driven by currents with respectively 0° - 180° - 0° - 180° - 0° - 180° phase differences.
  • the inductive coil unit comprises adjacent coils, at least one of which has a different number of windings and/or winding shape.
  • Figure 1 – is the schematic view of the inductive coil unit situated on the top plate of an induction heating cooker.
  • Figure 2 – is the schematic view of the inductive coil unit composed of two coils that are driven at different phases by separate power sources.
  • Figure 3 – is the schematic view of the inductive coil unit composed of two coils that are driven at different phases by the same power source.
  • Figure 4 – is the schematic view of the inductive coil unit composed of four coils having quadrilateral windings with rounded corners.
  • Figure 5 — is the schematic view of the coil arrays fed by separate power sources in (X) direction on the plane of the top plate of an induction heating cooker.
  • Figure 6 — is the schematic view of the coil arrays fed by separate power sources in (Y) direction on the plane of the top plate of an induction heating cooker.
  • Figure 7 — is the schematic view of the inductive coil unit composed of three coils arranged in trigonal form and the diagram showing the currents applied to the coils in different phases.
  • Figure 8 – is the schematic view of the inductive coil unit composed of the coils in hexagonal form surrounding a center coil.
  • Figure 9 – is the schematic view of the inductive coil unit composed of three coils having different number of windings and the diagram showing the currents applied to the coils in different phases.
  • Figure 10 – is the schematic view of the inductive coil unit composed of three coils having different winding shapes.
  • H Distance between the opposite corners of two coils in quadrilateral form with rounded sides arranged in diagonal position.
  • X, Y Horizontal axes that determine the plane of the induction heating cooker top plate.
  • the inductive coil unit (1) is suitable to be used in induction heating cookers especially in all-surface induction cookers comprising a top plate (2) whereon cooking containers suitable for induction heating are placed, and comprises a plurality of adjacent coils (S1, S2, S3, ...) that are produced from conductive wire or wires coated with non-conducting material, that are driven by one or more than one power source with an electric current of the same frequency and that magnetically interact with each other.
  • the inductive coil unit (1) of the present invention comprises the coils (S1, S2, S3, ...), one of which is driven by a current that is electrically in different phase than the adjacent coil (S1, S2, S3, ...) ( Figure 1)
  • the coils (S1, S2, S3, ...) are driven by alternative current in the same frequency; however, at least one of the two adjacent coils (S1, S2, S3, ...) is driven in electrically different phase.
  • one coil (for example S1) in the inductive coil unit (1) is taken as reference, and if the said reference coil (S1) is driven by a current having zero “0” degree electrical phase angle, the adjacent coil (S2 or S3) is driven by a current having a phase angle that is electrically different than “0” degree, such as 120° or 180°.
  • two or more adjacent coils (S1, S2, S3, ...) with magnetic communication therebetween are enabled to interact with each other such that the magnetic interaction therebetween is increased.
  • the inductive coil unit (1) comprises at least two coils (S1, S2) that are disposed side by side and driven with 180° electrical phase difference.
  • the inductive coil unit (1) comprises at least two coils (S1, S2) that are disposed side by side and driven with 180° electrical phase difference.
  • two coils (S1, S2) each having one unit power provide “2 units” of power in state of the art if the coils (S1, S2) are driven in the same phase
  • two coils (S1, S2) with the same size and number of windings provide “2.5 units” of power if the coils (S1, S2) are driven by a phase difference of 180°, thus increasing energy efficiency.
  • the two coils (S1, S2) are fed by two separate power sources (K) that apply currents of different phases ( Figure 2) or by a single power source (K) that applies current with 180° phase difference such that the electric currents in the coils (S1, S2) flow in opposite directions to one another ( Figure 3).
  • the winding inlets and outlets of the first coil (S1) and the second coil (S2) are connected differently to the “+” and “-” terminals of the power source (K).
  • the winding inlet of the first coil (S1) is connected to the “+” terminal of the power source (K)
  • the winding inlet of the second coil (S2) is connected to the “-“ terminal of the power source (K) ( Figure 3).
  • the inductive coil unit (1) comprises at least four coils (S1, S2, S3, S4) having windings in quadrangular form with rounded corners, that are arranged in the direction of two axes (X, Y) perpendicular to one another that determine a plane, for example the top plate (2) plane such that the centers of the coils (S1, S2, S3, S4) are aligned, each of the coils (S1, S2, S3, S4) being driven with a current in 180° different phase or in opposite direction with respect to the adjacent coil (S1, S2, S3, S4) ( Figure 4).
  • the coils ((S1 and S4) and (S2 and S3)) that are diagonal with respect to each other are driven by a current of the same phase; however, the opposite corners of the said diagonal coils ((S1 and S4) and (S2 and S3)) are rounded, the corners through which the current of the same phase passes in the same direction are distanced from each other for a certain distance (H), and the corners that are in diagonal positions are prevented from negatively affecting each other.
  • the current applied to the windings of the adjacent coils ((S1 and S2), (S2 and S3), (S3 and S4) and (S4 and S1)) is in opposite direction to each other and the magnetic coupling between the adjacent sides thereof provides a strengthening effect for the said coil pairs ((S1 and S2), (S2 and S3), (S3 and S4) and (S4 and S1)) and maximum power is obtained from the inductive coil unit (1) ( Figure 4).
  • the inductive coil unit (1) comprises coils (S1, S2, S3, ...) that are arranged in the same alignment on a plane, for example on the top plate (2) of the induction heating cooker so as to cover the whole surface of the top plate (2) on two axes (X, Y) perpendicular to each other, wherein the adjacent coils (S1, S2, S3, ...) in right – left (X) and front – rear (Y) directions are driven by 180° phase difference, preferably by a current in opposite direction ( Figure 1).
  • the inductive coil unit (1) comprises coil arrays (D1, D2, D3, ...) composed of side by side coils (S1, S2, S3, ...) arranged on a plane, for example on the top plate (2) of the induction heating cooker , in right – left directions (X) or in front – rear (Y) directions, and each coil array (D1, D2, D3, ...) is supplied by a separate power source (K) ( Figure 5, Figure 6).
  • the inductive coil unit (1) comprises the adjacent coils (S1, S2, S3) on the top plate (2) plane of the induction heating cooker in a three-cornered - trigonal manner such that the centers thereof form a triangle, wherein with respect to the reference first coil (S1) which is assumed to be driven by 0° phase difference (phase 0), the second coil (S2) is driven by 180° electrical phase difference and the third coil (S3) is driven by a constant phase difference that is different from 0° and 180° with respect to the reference first coil (S1) (for example 90° or 120° electrical phase difference).
  • the coils (S1, S2, S3) have hexagonal or circular windings and preferably each coil (S1, S2, S3) is fed by a separate power source (K) ( Figure 7).
  • the inductive coil unit (1) comprises at least seven coils (S1, S2, S3, S4, S5, S6, S7) with one center coil (S4) and the surrounding coils (S1, S2, S3, S5, S6, S7) that form a hexagonal shape, each coil (S1, S2, S3, S4, S5, S6, S7) being driven by a different phase than the adjacent coil (S1, S2, S3, S4, S5, S6, S7) ( Figure 8).
  • the coils (S1, S2, S3, S4, S5, S6, S7) have hexagonal or circular windings and preferably are fed by more than one power source (K).
  • the center coil (S4) is driven by a phase difference fixed at a value different than 0° and 180° (for example 90° or 120° electrical phase difference)
  • the coils (S1, S2, S3, S5, S6, S7) surrounding the center coil (S4) are driven respectively by currents with phase differences of 0° - 180° - 0° - 180° - 0° - 180° ( Figure 8).
  • the inductive coil unit (1) without changing the arrangement and architecture of the coils (S1, S2, S3, S4, S5, S6, S7) different phase combinations can be used in order to transmit the most power to the cooking container.
  • the center coil (S4) that is driven by 120° phase difference, the coils (S1, S3, S6) driven by 0° phase difference and the coils (S2, S5, S7) driven by 180° phase difference are preferably fed by separate power sources (K).
  • the inductive coil unit (1) comprises the adjacent coils (S1, S2, S3, ...) at least one of which has a different number of windings than the others and the adjacent coils (S1 and S2) and (S2 and S3) are driven by different phases (Figure 9).
  • the inductive coil unit (1) comprises the coils (S1, S2, S3, ...) at least one of which has a different shape of winding than the others and the adjacent coils (S1 and S2) and (S2 and S3) are driven by different phases.
  • quadrangular, hexagonal or circular winding shapes can be given as examples for different winding shapes ( Figure 10).
  • an inductive coil unit (1) two or more adjacent coils (S1, S2, S3, ...) are enabled to positively affect each other, and more power is transmitted to the cooking container on the induction heating cooker without changing the number of coils (S1, S2, S3, ...) and/or the winding numbers of the coils (S1, S2, S3, ).

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

Abstract

La présente invention concerne une unité de bobines d'induction (1) qui est appropriée pour être utilisée dans des cuisinières à chauffage par induction, en particulier dans des cuisinières à induction toutes surfaces, comprenant une plaque supérieure (2) sur laquelle des récipients de cuisson appropriés pour le chauffage par induction sont placés, l'unité de bobines d'induction (1) comprenant une pluralité de bobines adjacentes (S1, S2, S3...) qui sont produites à partir d'un ou plusieurs fils conducteurs revêtus d'un matériau non conducteur, qui sont attaquées par une ou plusieurs sources d'alimentation avec un courant électrique de la même fréquence, et qui interagissent magnétiquement l'une avec l'autre.
PCT/EP2016/078960 2015-12-01 2016-11-28 Unité de bobines d'induction WO2017093168A1 (fr)

Applications Claiming Priority (2)

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TRA2015/15179 2015-12-01
TR201515179 2015-12-01

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WO2017093168A1 true WO2017093168A1 (fr) 2017-06-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112386091A (zh) * 2019-08-19 2021-02-23 广东美的白色家电技术创新中心有限公司 一种ih电饭煲的线圈盘和锅胆
EP4054289A1 (fr) 2021-03-02 2022-09-07 Whirlpool Corporation Procédé d'amélioration de la précision d'acquisition de courbes de charge sur une plaque de cuisson à induction

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980858A (en) * 1973-08-22 1976-09-14 Mitsubishi Denki Kabushiki Kaisha Exciter for induction heating apparatus
US6498325B1 (en) * 1999-04-09 2002-12-24 Jaeger Regulation Modular induction heated cooking hob having reduced radiation and a method of making the same
EP1404155A1 (fr) * 2002-09-26 2004-03-31 Lennart Alfredeen Plaque de cuisson inductif
JP2010153170A (ja) * 2008-12-25 2010-07-08 Panasonic Corp 誘導加熱調理器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980858A (en) * 1973-08-22 1976-09-14 Mitsubishi Denki Kabushiki Kaisha Exciter for induction heating apparatus
US6498325B1 (en) * 1999-04-09 2002-12-24 Jaeger Regulation Modular induction heated cooking hob having reduced radiation and a method of making the same
EP1404155A1 (fr) * 2002-09-26 2004-03-31 Lennart Alfredeen Plaque de cuisson inductif
JP2010153170A (ja) * 2008-12-25 2010-07-08 Panasonic Corp 誘導加熱調理器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112386091A (zh) * 2019-08-19 2021-02-23 广东美的白色家电技术创新中心有限公司 一种ih电饭煲的线圈盘和锅胆
CN112386091B (zh) * 2019-08-19 2022-09-27 广东美的白色家电技术创新中心有限公司 一种ih电饭煲的线圈盘和锅胆
EP4054289A1 (fr) 2021-03-02 2022-09-07 Whirlpool Corporation Procédé d'amélioration de la précision d'acquisition de courbes de charge sur une plaque de cuisson à induction
US11910509B2 (en) 2021-03-02 2024-02-20 Whirlpool Corporation Method for improving accuracy in load curves acquisition on an induction cooktop

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