WO2014119293A1 - 非接触電力伝送装置用コイル及び非接触電力伝送装置 - Google Patents
非接触電力伝送装置用コイル及び非接触電力伝送装置 Download PDFInfo
- Publication number
- WO2014119293A1 WO2014119293A1 PCT/JP2014/000440 JP2014000440W WO2014119293A1 WO 2014119293 A1 WO2014119293 A1 WO 2014119293A1 JP 2014000440 W JP2014000440 W JP 2014000440W WO 2014119293 A1 WO2014119293 A1 WO 2014119293A1
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- WIPO (PCT)
- Prior art keywords
- coil
- power transmission
- magnetic body
- electric wire
- contact
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/02—Coils wound on non-magnetic supports, e.g. formers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
Definitions
- the present invention relates to a coil for a non-contact power transmission device used for charging an electric propulsion vehicle such as an electric vehicle or a plug-in hybrid vehicle.
- the non-contact power transmission apparatus includes a power feeding unit 101 including a coil 150 wound around an H-type core 140 and a power receiving unit 102.
- the air gap is arranged so as to face each other (see, for example, Patent Document 1).
- a rectangular core 170 can be used as shown in FIGS. 9 (a) and 9 (b).
- Coils for non-contact power transmission devices used for charging electric propulsion vehicles are made thinner to avoid contact with road surface interference (eg, vehicle stops, blocks), etc. is required. Further, the vehicle height fluctuates due to people getting on and off, loading and unloading of luggage, and the like. When the power feeding unit and the power receiving unit come into contact with each other due to a change in vehicle height, the power feeding unit or the power receiving unit may be damaged. Further, in order to ensure a certain air gap between the power feeding unit and the power receiving unit, the coil for the non-contact power transmission device is required to be thin.
- the curvature is increased at the bent portion of the coil 150 on the side surface of the core 140 in the cross-sectional short direction.
- a high-frequency current is supplied to the coil 150 and high-efficiency power transmission is realized by a generated high-frequency magnetic field.
- the coil 150 employs very thin stranded wires (Litz wires) insulated from each other in order to suppress heat generation due to an increase in resistance.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a coil for a non-contact power transmission device that can be reduced in thickness.
- a coil for a non-contact power transmission device is a coil used in a non-contact power transmission device for transmitting power in a non-contact manner, and a magnetic body having a flat cross section and a coil wound around the magnetic body.
- the electric wire is wound at a predetermined angle from a direction perpendicular to the side surface in the longitudinal direction of the cross section of the magnetic body on the side surface in the short cross section of the magnetic body. .
- the length of the electric wire on the side surface in the short direction of the cross section of the magnetic body that is easy to bend can be set to a predetermined length or more. Therefore, the bending of the electric wire can be relaxed. Therefore, it is possible to realize a thin coil for a non-contact power transmission device that is free from wire breakage and damage to the insulating coating.
- (A)-(c) is the schematic of the coil for non-contact electric power transmission apparatuses in one Embodiment of this invention. It is a cross-sectional enlarged view of the electric wire in this invention.
- (A)-(c) is the schematic which showed the winding state of the electric wire in this invention.
- (A)-(c) is the schematic of the coil for non-contact electric power transmission apparatuses in other embodiment of this invention.
- (A)-(c) is the schematic of the coil for non-contact electric power transmission apparatuses in other embodiment of this invention.
- (A)-(c) is the schematic of the coil for non-contact electric power transmission apparatuses in other embodiment of this invention.
- (A), (b) is a figure which shows the H-type core in the coil for conventional non-contact electric power feeders. It is a figure which shows the electric power feeding part and power receiving part which oppose in the conventional non-contact electric power feeder.
- (A), (b) is a figure which shows the rectangular core in the conventional non-contact electric power feeder.
- a coil for a non-contact power transmission device is a power transmission coil or a power reception coil used in a non-contact power transmission device for transmitting power in a non-contact manner, and has a flat cross section. And an electric wire wound around the magnetic body, and the electric wire is wound at a predetermined angle other than perpendicular to the side surface in the cross-sectional longitudinal direction of the magnetic body on the side surface in the cross-sectional short direction of the magnetic body. ing.
- the length of the electric wire on the side surface in the short direction of the cross section of the magnetic body, which is an easily bent portion, can be set to a predetermined length or more. Therefore, the bending of the electric wire can be relaxed. Therefore, it is possible to realize a thin coil for a non-contact power transmission device that is free from wire breakage and damage to the insulating coating.
- FIG. 1A to 1C are schematic views of a coil for a non-contact power transmission device according to an embodiment of the present invention.
- FIG. 1A is a plan view and
- FIG. 1B is a winding axis of the coil.
- FIG. 1C is a side view seen from the direction perpendicular to the winding axis of the coil.
- a bobbin 2 made of an insulating resin is arranged around a magnetic body 1 that has a plurality of ferrites arranged to have a flat cross section.
- An electric wire 3 is wound around the magnetic body 1 via a bobbin 2.
- the magnetic body 1 and the electric wire 3 act as a coil 4 having an inductance.
- a current is passed through the electric wire 3
- a magnetic flux is generated in the magnetic body 1 in the winding axis direction (left-right direction) in FIG.
- the coil 4 is installed as a power transmission coil and a power reception coil so as to face each other.
- FIG. 2 is an enlarged cross-sectional view of the electric wire 3.
- the electric wire 3 is a litz wire obtained by twisting a number of strands 7 composed of a conductive portion 5 made of copper wire or the like and an insulating portion 6 such as an epoxy layer provided on the surface thereof.
- the litz wire is configured to sufficiently suppress resistance when a high-frequency current flows and reduce heat generation.
- a high-frequency current is supplied to the electric wire 3 of the power transmission coil from a power source (not shown), and a high-frequency magnetic field generated in the power transmission coil and a power receiving coil 4 opposed to the power transmission coil are magnetically coupled, thereby enabling high-efficiency power transmission. Done.
- the electric wire 3 By configuring the electric wire 3 with a litz wire, current concentration on the surface of the conductive part 5 (skin effect) generated when a high-frequency current is passed, or current distribution due to a magnetic field generated by the current flowing in the adjacent conductive part 5 It is possible to reduce the bias (proximity effect) and suppress an increase in resistance.
- the conductive portion 5 constituting such a litz wire is very thin and the insulating portion 6 is also a very thin layer, if the wire 3 is handled in a bent state, the conductive portion 5 may be disconnected or insulated. The part 6 may be damaged or peeled off, and the resistance of the electric wire 3 may be increased.
- FIG. 3A is a side view seen from a direction perpendicular to the winding axis of the coil 4 as shown in FIG. 1C, and shows the electric wire 3 wound on the short side surface of the magnetic body 1.
- the length is L
- the angle of the electric wire 3 from the direction perpendicular to the long side of the magnetic body 1 is ⁇
- the winding thickness of the electric wire 3 ( ⁇ bobbin 2 thickness) is t.
- the magnetic body 1 has a flat shape with a substantially rectangular cross section
- the short side surface of the magnetic body 1 is the short side of the cross section of the magnetic body 1 among the side surfaces parallel to the winding axis direction of the coil 4.
- a side surface having a side as a width is referred to
- the long side surface of the magnetic body 1 is a side surface having a long side of a cross section of the magnetic body 1 as a width.
- the wire 3 when the wire 3 is wound with ⁇ increased, in other words, when the wire 3 is wound so that L becomes long, the wire 3 is wound with a large bending radius as shown in FIG. It becomes possible to turn.
- the electric wire 3 can be wound with a large bending radius, and the conductive portion 5 is disconnected or insulated. The damage of the part 6 and the occurrence of peeling can be prevented, and the reliability can be maintained high.
- the electric wire 3 is composed of a litz wire, it is possible to suppress an increase in resistance, suppress heat generation in the coil 4, and enable highly efficient power transmission.
- the thinning required for the coil for the non-contact power transmission device used for charging the electric propulsion vehicle can be realized, it is possible to avoid contact with road surface interferences (for example, vehicle stops, blocks), etc. It is possible to avoid damage due to contact of the power transmission coil and the power reception coil when the vehicle height fluctuates due to getting on and off, loading and unloading of luggage, and the like.
- the insulation part 6 of the litz wire has a different bending radius and allowable bending range depending on the thickness, material, heat resistance, etc., and is related to the specifications of the electric wire 3.
- the winding angle ⁇ of the electric wire 3 may be set according to the specifications of the electric wire 3 so as to ensure an allowable bending range of the electric wire 3 that does not damage the insulating portion 6.
- the winding angle ⁇ of the electric wire 3 is preferably set in the range of 10 to 60 degrees, more preferably in the range of 30 to 60 degrees.
- FIGS. 1A to 1C an example in which the outer diameter of the electric wire 3 is wound while the outer diameter is substantially constant and a space is provided between the turns of the electric wire 3 has been described. Not what you want.
- FIGS. 4A to 4C if the electric wire 3 is deformed and wound so as to be flat on the longitudinal side surface of the coil 4, the height of the electric wire 3 is suppressed, and the coil 4 is reduced. Can be further reduced in thickness.
- the example which wound the electric wire 3 so that the winding angle (theta) of the side surface of the transversal direction of the coil 4 becomes constant.
- the electric wires 3 wound around the side surfaces of the magnetic body 1 in the cross-sectional short direction are connected to the ends of the bobbins 2 of the electric wires 3. It may be wound substantially perpendicular to the side surface in the longitudinal direction of the cross section. Thereby, it becomes easy to fix the end part of the electric wire 3, and the shift
- FIG. What is necessary is just to change the winding angle of the electric wire 3 in a required part according to the objectives, such as a shift
- the winding angle of the electric wire 3 may be changed midway.
- the coil 4 is used as a power transmission coil or a power reception coil of a non-contact power transmission device, when the opening direction of the opening formed on both ends of the wound electric wire 3 is directed to the opposing coil, Since the magnetic field generated from the end portion is more likely to be directed toward the opposing coil, the transmission efficiency can be improved and the leakage magnetic field can be reduced.
- the coil 4 of this embodiment can be used for one or both of a coil installed on the ground side as a power transmitting side and a coil installed on the vehicle side as a power receiving side.
- the coil 4 of the present embodiment may be adopted only for the coil installed on the vehicle side.
- the present invention can be applied to a power transmission coil and a power reception coil for a non-contact power transmission device used for charging an electric propulsion vehicle such as an electric vehicle or a plug-in hybrid vehicle.
Abstract
Description
以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。
2 ボビン
3 電線
4 コイル
Claims (4)
- 電力を非接触で伝送するための非接触電力伝送装置に用いられるコイルであって、
断面が偏平形状となる磁性体と、
前記磁性体に巻回された電線と
を備え、
前記電線は、前記磁性体の短側面において、前記磁性体の長側面に対して垂直方向から、所定の角度をなして巻回されている、非接触電力伝送装置用コイル。 - 前記電線は、その表面が絶縁部で覆われており、
前記所定の角度は、前記磁性体の短側面において、前記絶縁物が損傷しない曲げ許容範囲内に設定されている、請求項1に記載の非接触電力伝送装置用コイル。 - 前記所定の角度は、10~60度の範囲にある、請求項1に記載の非接触電力伝送装置用コイル。
- 送電コイルを備えた給電部と、受電コイルを備えた受電部とからなる非接触電力伝送装置であって、
前記送電コイル及び/又は前記受電コイルは、請求項1または2に記載の非接触電力伝送装置用コイルからなる、非接触電力伝送装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014559572A JPWO2014119293A1 (ja) | 2013-01-30 | 2014-01-29 | 非接触電力伝送装置用コイル及び非接触電力伝送装置 |
EP14745781.6A EP2953144B1 (en) | 2013-01-30 | 2014-01-29 | Contactless-power-transfer-device coil and contactless power-transfer device |
US14/813,046 US20150332848A1 (en) | 2013-01-30 | 2015-07-29 | Coil for non-contact power transmission system and non-contact power transmission system |
Applications Claiming Priority (2)
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JP2013015074 | 2013-01-30 | ||
JP2013-015074 | 2013-01-30 |
Related Child Applications (1)
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US14/813,046 Continuation US20150332848A1 (en) | 2013-01-30 | 2015-07-29 | Coil for non-contact power transmission system and non-contact power transmission system |
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WO2014119293A1 true WO2014119293A1 (ja) | 2014-08-07 |
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PCT/JP2014/000440 WO2014119293A1 (ja) | 2013-01-30 | 2014-01-29 | 非接触電力伝送装置用コイル及び非接触電力伝送装置 |
Country Status (4)
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US (1) | US20150332848A1 (ja) |
EP (1) | EP2953144B1 (ja) |
JP (1) | JPWO2014119293A1 (ja) |
WO (1) | WO2014119293A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000182869A (ja) * | 1998-12-16 | 2000-06-30 | Citizen Electronics Co Ltd | 磁心入りコイルを有する回路部品とその製造方法および製造に用いるボビン |
JP2011050127A (ja) | 2009-08-25 | 2011-03-10 | Saitama Univ | 非接触給電装置 |
JP2011129747A (ja) * | 2009-12-18 | 2011-06-30 | Alps Electric Co Ltd | 高周波機器用のコイル及び該コイルを備える高周波機器 |
JP2014011332A (ja) * | 2012-06-29 | 2014-01-20 | Toyota Motor Corp | 非接触電力伝送用コイルユニット、受電装置、車両、および送電装置 |
Family Cites Families (8)
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EP1506554A1 (en) * | 2002-05-13 | 2005-02-16 | Splashpower Limited | Improvements relating to the transfer of electromagnetic power |
GB0210886D0 (en) * | 2002-05-13 | 2002-06-19 | Zap Wireless Technologies Ltd | Improvements relating to contact-less power transfer |
US9105959B2 (en) * | 2008-09-27 | 2015-08-11 | Witricity Corporation | Resonator enclosure |
US20120313742A1 (en) * | 2008-09-27 | 2012-12-13 | Witricity Corporation | Compact resonators for wireless energy transfer in vehicle applications |
US8302286B2 (en) * | 2008-09-30 | 2012-11-06 | Denso Corporation | Method for manufacturing a stator winding |
US20110204845A1 (en) * | 2010-02-25 | 2011-08-25 | Evatran Llc | System and method for inductively transferring ac power and self alignment between a vehicle and a recharging station |
CN103339698B (zh) * | 2011-01-19 | 2016-09-28 | 株式会社泰库诺瓦 | 非接触供电装置 |
JP6309517B2 (ja) * | 2012-06-27 | 2018-04-11 | ワイトリシティ コーポレーションWitricity Corporation | 充電式バッテリに対する無線エネルギー伝送 |
-
2014
- 2014-01-29 EP EP14745781.6A patent/EP2953144B1/en active Active
- 2014-01-29 WO PCT/JP2014/000440 patent/WO2014119293A1/ja active Application Filing
- 2014-01-29 JP JP2014559572A patent/JPWO2014119293A1/ja active Pending
-
2015
- 2015-07-29 US US14/813,046 patent/US20150332848A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000182869A (ja) * | 1998-12-16 | 2000-06-30 | Citizen Electronics Co Ltd | 磁心入りコイルを有する回路部品とその製造方法および製造に用いるボビン |
JP2011050127A (ja) | 2009-08-25 | 2011-03-10 | Saitama Univ | 非接触給電装置 |
JP2011129747A (ja) * | 2009-12-18 | 2011-06-30 | Alps Electric Co Ltd | 高周波機器用のコイル及び該コイルを備える高周波機器 |
JP2014011332A (ja) * | 2012-06-29 | 2014-01-20 | Toyota Motor Corp | 非接触電力伝送用コイルユニット、受電装置、車両、および送電装置 |
Non-Patent Citations (1)
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See also references of EP2953144A4 |
Also Published As
Publication number | Publication date |
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EP2953144A1 (en) | 2015-12-09 |
US20150332848A1 (en) | 2015-11-19 |
EP2953144B1 (en) | 2017-10-11 |
JPWO2014119293A1 (ja) | 2017-01-26 |
EP2953144A4 (en) | 2016-04-13 |
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