JP2015115580A - Power transmission system - Google Patents

Power transmission system Download PDF

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JP2015115580A
JP2015115580A JP2013259042A JP2013259042A JP2015115580A JP 2015115580 A JP2015115580 A JP 2015115580A JP 2013259042 A JP2013259042 A JP 2013259042A JP 2013259042 A JP2013259042 A JP 2013259042A JP 2015115580 A JP2015115580 A JP 2015115580A
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power
power transmission
coil
unit
transmission system
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浩章 湯浅
Hiroaki Yuasa
浩章 湯浅
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Toyota Motor Corp
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Toyota Motor Corp
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    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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Abstract

PROBLEM TO BE SOLVED: To provide a power transmission system including a configuration capable of minimizing decrease in power transmission efficiency.SOLUTION: In a power transmission system having a power reception unit 210 for receiving power, in non contact, from a power transmission unit 410 while facing thereto, the power transmission unit 410 includes a power transmission coil 450, the power reception unit 210 includes a power reception coil 250, and the solenoid length L1 of the power transmission coil 450 is longer than the solenoid length L2 of the power reception coil 250.

Description

本発明は、非接触で電力を送電装置から受電する受電装置を備える電力伝送システムに関する。   The present invention relates to a power transmission system including a power receiving device that receives power from a power transmitting device in a contactless manner.

特許文献１〜７に開示されているように、非接触で電力を送受電する送電装置および受電装置を用いる電力伝送システムが知られている。このような電力伝送システムにおいては、送電装置に用いられる送電コイルのソレノイド長さと、受電装置に用いられる受電コイルのソレノイド長さとは、実質的に一致するように形成されている。   As disclosed in Patent Documents 1 to 7, a power transmission device that transmits and receives power without contact and a power transmission system that uses the power reception device are known. In such a power transmission system, the solenoid length of the power transmission coil used in the power transmission device and the solenoid length of the power reception coil used in the power reception device are substantially matched.

特開２０１３−１５４８１５号公報JP2013-154815A 特開２０１３−１４６１５４号公報JP2013-146154A 特開２０１３−１４６１４８号公報JP2013-146148A 特開２０１３−１１０８２２号公報JP 2013-110822 A 特開２０１３−１２６３２７号公報JP 2013-126327 A 特開２０１２−２０４４６９号公報JP 2012-204469 A 特開２０１２−１７５７９３号公報JP 2012-175793 A

上述したように、送電コイルのソレノイド長さと受電コイルのソレノイド長さとを実質的に一致させることで、送電装置および受電装置のＬ値を一致させ易く、各コイルに接続するコンデンサの容量が一致したコンデンサを接続することで、各共振周波数を容易に一致させることができる。   As described above, by substantially matching the solenoid length of the power transmission coil and the solenoid length of the power reception coil, the L values of the power transmission device and the power reception device can be easily matched, and the capacitances of the capacitors connected to the coils are matched. By connecting a capacitor, each resonance frequency can be easily matched.

しかし、上記電力伝送システムにおいては、送電コイルと受電コイルとが位置ずれすると、位置ずれ量によっては、送電コイルと受電コイルとの間の磁気経路が変化し、大きく電力伝送効率が大きく低下するおそれがある。   However, in the above power transmission system, if the power transmission coil and the power reception coil are misaligned, the magnetic path between the power transmission coil and the power reception coil may change depending on the amount of misalignment, and the power transmission efficiency may be greatly reduced. There is.

本発明は、上記課題に鑑みてなされたものであり、電力送電効率の低下を抑制することが可能な構成を備える電力伝送システムを提供することを目的とする。   This invention is made | formed in view of the said subject, and aims at providing a power transmission system provided with the structure which can suppress the fall of electric power transmission efficiency.

この電力伝送システムにおいては、送電部に対向した状態で上記送電部から非接触で電力を受電する受電部を有する電力伝送システムであって、送電部は、送電コイルを含み、上記受電部は、受電コイルを含み、上記送電コイルのソレノイド長さは、上記受電コイルのソレノイド長さよりも長い。   In this power transmission system, the power transmission system includes a power receiving unit that receives power from the power transmission unit in a non-contact manner in a state of facing the power transmission unit, the power transmission unit includes a power transmission coil, and the power reception unit includes: Including a power receiving coil, the solenoid length of the power transmitting coil is longer than the solenoid length of the power receiving coil.

この構成によれば、送電コイルと受電コイルとが位置ずれした場合でも、送電コイルのソレノイド長さは、受電コイルのソレノイド長さよりも長いことから、送電コイルと受電コイルとの間の磁気経路を維持させることができる。   According to this configuration, even when the power transmission coil and the power reception coil are misaligned, the solenoid length of the power transmission coil is longer than the solenoid length of the power reception coil, so that the magnetic path between the power transmission coil and the power reception coil is reduced. Can be maintained.

この電力伝送システムによれば、電力送電効率の低下を抑制することが可能な構成を備える電力伝送システムを提供する。   According to this electric power transmission system, an electric power transmission system provided with the structure which can suppress the fall of electric power transmission efficiency is provided.

実施の形態の電力伝送システムを模式的に示す図である。It is a figure showing typically the electric power transmission system of an embodiment. 実施の形態の受電部の構造を示す斜視図である。It is a perspective view which shows the structure of the power receiving part of embodiment. 実施の形態の送電部の構造を示す斜視図である。It is a perspective view which shows the structure of the power transmission part of embodiment. 背景技術における送電部と受電部とに位置ずれが生じた場合の図である。It is a figure in case position shift arises in the power transmission part and power receiving part in background art. 背景技術における送電部と受電部とに位置ずれが生じた場合の図である。It is a figure in case position shift arises in the power transmission part and power receiving part in background art. 実施の形態の送電部と受電部とに位置ずれが生じた場合を示す図である。It is a figure which shows the case where position shift has arisen in the power transmission part and power receiving part of embodiment. 送電コイル（一次コイル）のソレノイド長さと、ｋ値との関係を示す図である。It is a figure which shows the relationship between the solenoid length of a power transmission coil (primary coil), and k value.

本発明に基づいた実施の形態について、以下、図面を参照しながら説明する。実施の形態の説明において、個数および量などに言及する場合、特に記載がある場合を除き、本発明の範囲は必ずしもその個数およびその量などに限定されない。実施の形態の説明において、同一の部品および相当部品に対しては、同一の参照番号を付し、重複する説明は繰り返さない場合がある。   Embodiments based on the present invention will be described below with reference to the drawings. In the description of the embodiments, when the number and amount are referred to, the scope of the present invention is not necessarily limited to the number and amount unless otherwise specified. In the description of the embodiments, the same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

図１を参照して、実施の形態１における電力伝送システム１０００について説明する。図１は、電力伝送システム１０００の全体構成を模式的に示す図である。電力伝送システム１０００は、電動車両１００（車両）および外部給電装置３００を備える。   With reference to FIG. 1, the power transmission system 1000 in Embodiment 1 is demonstrated. FIG. 1 is a diagram schematically illustrating the overall configuration of the power transmission system 1000. The power transmission system 1000 includes an electric vehicle 100 (vehicle) and an external power feeding device 300.

（電動車両１００）
図１を参照して、電動車両１００は、車両本体１１０および受電装置２００を備える。車両本体１１０には、車両ＥＣＵ１２０（制御部）、整流器１３０、ＤＣ／ＤＣコンバータ（以下、単に「コンバータ」と称する。）１４０、バッテリ１５０、パワーコントロールユニット（以下、単に「ＰＣＵ」と称する。）１６０、モータユニット１７０、および通信部１８０などが設けられる。受電装置２００は、受電コイル２５０を有し、車両本体１１０の底面に配置される。 (Electric vehicle 100)
Referring to FIG. 1, electrically powered vehicle 100 includes a vehicle main body 110 and a power receiving device 200. The vehicle main body 110 includes a vehicle ECU 120 (control unit), a rectifier 130, a DC / DC converter (hereinafter simply referred to as “converter”) 140, a battery 150, and a power control unit (hereinafter simply referred to as “PCU”). 160, a motor unit 170, a communication unit 180, and the like. The power receiving device 200 has a power receiving coil 250 and is disposed on the bottom surface of the vehicle main body 110.

外部給電装置３００は送電装置４００を含み、送電装置４００は送電コイル４５０を有している。受電装置２００の受電コイル２５０が送電装置４００の送電コイル４５０に対向した状態で、受電装置２００は送電装置４００から電力を非接触で受電する。受電装置２００は、受電部２１０と、受電部２１０に接続されたコンデンサ２２０と、後述のシールドとを有する。受電部２１０は、ソレノイド型のコアユニット２６０と受電コイル２５０とを有する。   The external power supply apparatus 300 includes a power transmission apparatus 400, and the power transmission apparatus 400 includes a power transmission coil 450. In a state where the power receiving coil 250 of the power receiving device 200 faces the power transmitting coil 450 of the power transmitting device 400, the power receiving device 200 receives power from the power transmitting device 400 in a contactless manner. The power receiving device 200 includes a power receiving unit 210, a capacitor 220 connected to the power receiving unit 210, and a shield described later. The power receiving unit 210 includes a solenoid type core unit 260 and a power receiving coil 250.

受電コイル２５０は、浮遊容量を有し、整流器１３０に接続されている。受電コイル２５０の誘導係数と、受電コイル２５０の浮遊容量およびコンデンサ２２０の電気容量とによって、電気回路が形成される。コンデンサ２２０および受電コイル２５０は、直列に接続されるが、これらは並列に接続されていてもよい。   The power receiving coil 250 has a stray capacitance and is connected to the rectifier 130. An electric circuit is formed by the induction coefficient of the power receiving coil 250, the stray capacitance of the power receiving coil 250, and the electric capacity of the capacitor 220. The capacitor 220 and the power receiving coil 250 are connected in series, but they may be connected in parallel.

電力伝送システム１０００において、車両本体１１０が停止しているときに給電ボタンがオン状態に設定されたことを車両ＥＣＵ１２０が検出した場合、車両の動作モードは充電モードに切り替えられる。車両ＥＣＵ１２０は、通信部１８０を介して、外部給電装置３００によるバッテリ１５０の充電制御の実行を指示する。   In the power transmission system 1000, when the vehicle ECU 120 detects that the power supply button is set to the on state when the vehicle main body 110 is stopped, the operation mode of the vehicle is switched to the charging mode. Vehicle ECU 120 instructs execution of charging control of battery 150 by external power supply device 300 via communication unit 180.

（外部給電装置３００）
外部給電装置３００は、送電装置４００、高周波電力装置３１０、送電ＥＣＵ３２０、および通信部３２２を含む。高周波電力装置３１０は、交流電源３３０に接続される。交流電源３３０は、商用電源または独立電源装置等である。送電装置４００は、駐車スペース内に設けられ、高周波電力装置３１０に接続される。送電ＥＣＵ３２０は、高周波電力装置３１０などの駆動を制御する。 (External power supply device 300)
External power supply device 300 includes a power transmission device 400, a high frequency power device 310, a power transmission ECU 320, and a communication unit 322. The high frequency power device 310 is connected to the AC power source 330. The AC power supply 330 is a commercial power supply or an independent power supply device. The power transmission device 400 is provided in the parking space and connected to the high frequency power device 310. The power transmission ECU 320 controls driving of the high-frequency power device 310 and the like.

通信部３２２は、外部給電装置３００と電動車両１００との間で無線通信を行なうための通信インターフェースである。通信部３２２は、電動車両１００の通信部１８０から送信されるバッテリ情報、送電の開始、継続、および停止を指示する信号、ならびに、送電電力の増加若しくは減少を指示する信号などを受信し、これらの情報を送電ＥＣＵ３２０へ出力する。   Communication unit 322 is a communication interface for performing wireless communication between external power supply apparatus 300 and electric vehicle 100. The communication unit 322 receives battery information transmitted from the communication unit 180 of the electric vehicle 100, a signal instructing start, continuation, and stop of power transmission, a signal instructing increase or decrease in transmitted power, and the like. Is output to the power transmission ECU 320.

送電装置４００は、送電部４１０と、送電部４１０に接続されたコンデンサ４２０と、後述のシールドとを有する。送電部４１０は、ソレノイド型のコアユニット４４０と送電コイル４５０とを有する。送電コイル４５０は、浮遊容量を有し、高周波電力装置３１０に接続されている。送電コイル４５０の誘導係数と、送電コイル４５０の浮遊容量およびコンデンサ４２０の電気容量とによって、電気回路が形成される。コンデンサ４２０および送電コイル４５０は、直列に接続されるが、これらは並列に接続されていてもよい。   The power transmission device 400 includes a power transmission unit 410, a capacitor 420 connected to the power transmission unit 410, and a shield described later. The power transmission unit 410 includes a solenoid type core unit 440 and a power transmission coil 450. The power transmission coil 450 has a stray capacitance and is connected to the high frequency power device 310. An electric circuit is formed by the induction coefficient of power transmission coil 450, the stray capacitance of power transmission coil 450, and the electric capacity of capacitor 420. The capacitor 420 and the power transmission coil 450 are connected in series, but they may be connected in parallel.

高周波電力装置３１０は、交流電源３３０から受ける電力を高周波の電力に変換し、変換した高周波電力を送電コイル４５０へ供給する。送電コイル４５０は、受電部２１０の受電コイル２５０へ、電磁誘導により非接触で電力を送電する。   The high frequency power device 310 converts the power received from the AC power source 330 into high frequency power, and supplies the converted high frequency power to the power transmission coil 450. The power transmission coil 450 transmits power to the power reception coil 250 of the power reception unit 210 in a non-contact manner by electromagnetic induction.

このように送電装置４００において、高周波電力装置３１０は、交流電源３３０から受ける電力を高周波の電力に変換し、変換した高周波電力を送電コイル４５０へ供給する。送電部４１０および受電部２１０の各々は、コイル（４５０，２５０）とコンデンサ（４２０，２２０）とを含み、伝送周波数において共振するように設計されている。送電部４１０および受電部２１０の共振強度を示すＱ値は、１００以上であることが好ましい。   Thus, in power transmission device 400, high frequency power device 310 converts the power received from AC power supply 330 into high frequency power, and supplies the converted high frequency power to power transmission coil 450. Each of power transmission unit 410 and power reception unit 210 includes coils (450, 250) and capacitors (420, 220), and is designed to resonate at a transmission frequency. The Q value indicating the resonance intensity of the power transmission unit 410 and the power reception unit 210 is preferably 100 or more.

（受電部２１０の構造）
図２を参照して、受電部２１０の構造について説明する。図２は、受電部２１０の構造を示す斜視図である。受電部２１０は、受電コイル２５０、およびコアユニット２６０を含む。コアユニット２６０には、コイル巻回軸Ｏ２を中心として、コアユニット２６０の上面および下面を含む周囲において螺旋状に受電コイル２５０が巻回されている。 (Structure of power receiving unit 210)
With reference to FIG. 2, the structure of power reception unit 210 will be described. FIG. 2 is a perspective view illustrating the structure of the power receiving unit 210. The power receiving unit 210 includes a power receiving coil 250 and a core unit 260. The power receiving coil 250 is spirally wound around the core unit 260 around the coil winding axis O2 around the core unit 260 including the upper surface and the lower surface.

コアユニット２６０は、上面２６０Ａ、下面２６０Ｂ、側面２６０Ｃ〜２６０Ｆを有する全体として板状の形状を有する。コアユニット２６０は、複数の分割コアが組み合わされ、この分割コアが絶縁紙により包囲されている。分割コアにはいずれもフェライトが用いられる。   The core unit 260 has a plate-like shape as a whole having an upper surface 260A, a lower surface 260B, and side surfaces 260C to 260F. In the core unit 260, a plurality of divided cores are combined, and the divided cores are surrounded by insulating paper. Ferrite is used for each of the split cores.

受電コイル２５０は、コイル巻回軸Ｏ２の軸方向（コイルの磁束方向）において、所定長さのソレノイド長さ（Ｌ２）を有している。ここで、ソレノイド長さとは、コアユニット２６０に巻回された受電コイル２５０のコイル巻回軸Ｏ２方向の長さにおいて、受電コイル２５０として磁界形成に寄与する長さをいう。また、このソレノイド長さ（Ｌ２）の中心をＣＬ２とする。   The power receiving coil 250 has a solenoid length (L2) of a predetermined length in the axial direction of the coil winding axis O2 (the magnetic flux direction of the coil). Here, the solenoid length refers to the length of the power receiving coil 250 wound around the core unit 260 in the coil winding axis O2 direction that contributes to magnetic field formation as the power receiving coil 250. The center of the solenoid length (L2) is CL2.

（送電部４１０の構造）
図３を参照して、送電部４１０の構造について説明する。図３は、送電部４１０の構造を示す斜視図である。送電部４１０は、送電コイル４５０、およびコアユニット４６０を含む。コアユニット４６０には、コイル巻回軸Ｏ２を中心として、コアユニット４６０の上面および下面を含む周囲において螺旋状に送電コイル４５０が巻回されている。コイル巻回軸Ｏ２は、車両の前後方向に沿って配置されてもよいし、車両の左右方向方向に沿って配置されてもよい。 (Structure of power transmission unit 410)
With reference to FIG. 3, the structure of power transmission unit 410 will be described. FIG. 3 is a perspective view showing the structure of the power transmission unit 410. The power transmission unit 410 includes a power transmission coil 450 and a core unit 460. A power transmission coil 450 is spirally wound around the core unit 460 around the coil winding axis O2 and including the upper surface and the lower surface of the core unit 460. The coil winding axis O2 may be disposed along the front-rear direction of the vehicle, or may be disposed along the left-right direction of the vehicle.

コアユニット４６０は、上面４６０Ａ、下面４６０Ｂ、側面４６０Ｃ〜４６０Ｆを有する全体として板状の形状を有する。コアユニット４６０は、複数の分割コアが組み合わされ、この分割コアが絶縁紙により包囲されている。分割コアにはいずれもフェライトが用いられる。   The core unit 460 has a plate shape as a whole having an upper surface 460A, a lower surface 460B, and side surfaces 460C to 460F. In the core unit 460, a plurality of divided cores are combined, and the divided cores are surrounded by insulating paper. Ferrite is used for each of the split cores.

送電コイル４５０は、コイル巻回軸Ｏ２の軸方向（コイルの磁束方向）において、所定長さのソレノイド長さ（Ｌ１）を有している。ここで、ソレノイド長さとは、コアユニット４６０に巻回された送電コイル４５０のコイル巻回軸Ｏ２方向の長さにおいて、送電コイル４５０として磁界形成に寄与する長さをいう。また、このソレノイド長さ（Ｌ１）の中心をＣＬ１とする。   The power transmission coil 450 has a solenoid length (L1) of a predetermined length in the axial direction of the coil winding axis O2 (the magnetic flux direction of the coil). Here, the solenoid length refers to the length of the power transmission coil 450 wound around the core unit 460 in the coil winding axis O2 direction that contributes to magnetic field formation as the power transmission coil 450. The center of the solenoid length (L1) is CL1.

（電力送電効率）
次に、図４から図７を参照して、上記送電部４１０を有する送電装置４００、および上記受電部２１０を有する受電装置２００を用いた電力伝送システムの電力送電効率について説明する。図４および図５は、背景技術における送電部と受電部とに位置ずれが生じた場合の第１および第２の図、図６は、実施の形態の送電部と受電部とに位置ずれが生じた場合を示す図、図７は、送電コイル（一次コイル）のソレノイド長さと、ｋ値との関係を示す図である。 (Electric power transmission efficiency)
Next, with reference to FIG. 4 to FIG. 7, the power transmission efficiency of the power transmission system using the power transmission device 400 having the power transmission unit 410 and the power reception device 200 having the power reception unit 210 will be described. FIGS. 4 and 5 are first and second diagrams in the case where a positional deviation occurs between the power transmitting unit and the power receiving unit in the background art, and FIG. 6 is a positional deviation between the power transmitting unit and the power receiving unit according to the embodiment. FIG. 7 is a diagram showing a relationship between the solenoid length of the power transmission coil (primary coil) and the k value.

図４は、送電コイル４５０のソレノイド長さ（Ｌ１）と、受電コイル２５０のソレノイド長さ（Ｌ２）とが同じ長さの場合に、コイル間に位置ずれが生じた場合を示している。ここで、位置ずれとは、コイル巻回軸Ｏ２の方向に沿って、受電コイル２５０の中心ＣＬ２と、送電コイル４５０の中心ＣＬ１とがずれる場合を意味する。図４では、受電コイル２５０の中心ＣＬ２と送電コイル４５０の中心ＣＬ１とが、距離Ｚ１ずれている。   FIG. 4 shows a case where a positional deviation occurs between the coils when the solenoid length (L1) of the power transmission coil 450 and the solenoid length (L2) of the power reception coil 250 are the same length. Here, the positional deviation means a case where the center CL2 of the power receiving coil 250 and the center CL1 of the power transmitting coil 450 are displaced along the direction of the coil winding axis O2. In FIG. 4, the center CL2 of the power receiving coil 250 and the center CL1 of the power transmitting coil 450 are shifted by a distance Z1.

距離Ｚ１の位置ずれ量が小さい場合には、送電コイル４５０と受電コイル２５０との間に形成される磁界の経路は、図４に示すように、位置ずれがあっても、理想的な磁気経路Ｍを形成する。   When the displacement amount of the distance Z1 is small, the path of the magnetic field formed between the power transmission coil 450 and the power reception coil 250 is an ideal magnetic path even if there is a displacement as shown in FIG. M is formed.

しかし、図５に示すように、位置ずれ量が距離Ｚ２（＞Ｚ１）と大きくなった場合には、理想的な磁気経路Ｍが形成されなくなり、磁気経路が短絡したような状態になる。図５に示すような磁気経路Ｍ２が形成された場合には、送電コイル４５０と受電コイル２５０との間の結合系数ｋが著しく悪化する。その結果、この電力伝送システムの電力送電効率の低下を招くことになる。   However, as shown in FIG. 5, when the amount of misalignment increases to a distance Z2 (> Z1), the ideal magnetic path M is not formed, and the magnetic path is short-circuited. When the magnetic path M2 as shown in FIG. 5 is formed, the coupling system number k between the power transmission coil 450 and the power reception coil 250 is significantly deteriorated. As a result, the power transmission efficiency of this power transmission system is reduced.

そこで、発明者らは、図６に示すように、送電コイル（一次コイル）４５０のソレノイド長さ（Ｌ１）は、受電コイル２５０のソレノイド長さ（Ｌ２）よりも長くなる構成を採用した。この構成で、コイル巻回軸Ｏ２方向に沿って、送電コイル４５０と受電コイル２５０との間に、位置ずれ（本実施の形態では、Ｚ＝１００ｍｍ）を生じさせた状態で、送電コイル４５０のソレノイド長（Ｌ１）を変化させ、送電コイル４５０と受電コイル２５０との間の結合系数ｋの値を測定した。受電コイル（二次コイル）２５０のソレノイド長さ（Ｌ２）は、１５０ｍｍと一定の長さとした。   Therefore, the inventors have adopted a configuration in which the solenoid length (L1) of the power transmission coil (primary coil) 450 is longer than the solenoid length (L2) of the power reception coil 250, as shown in FIG. With this configuration, in a state where a positional deviation (Z = 100 mm in the present embodiment) is generated between the power transmission coil 450 and the power reception coil 250 along the coil winding axis O2 direction, The solenoid length (L1) was changed, and the value of the coupling system number k between the power transmission coil 450 and the power reception coil 250 was measured. The solenoid length (L2) of the power receiving coil (secondary coil) 250 was a constant length of 150 mm.

その結果、図７に示すように、受電コイル２５０のソレノイド長さ（Ｌ２）が、１５０ｍｍと一定の場合に、送電コイル４５０のソレノイド長さ（Ｌ１）を大きくしていくと、ｋ値が増加し、送電コイル４５０のソレノイド長さ（Ｌ１）が、位置ずれ（Ｚ＝１００ｍｍ）の約３倍の値以上で、結合系数ｋは、飽和することが分かった。   As a result, as shown in FIG. 7, when the solenoid length (L2) of the power receiving coil 250 is constant at 150 mm, the k value increases as the solenoid length (L1) of the power transmitting coil 450 is increased. In addition, it was found that the coupling system number k is saturated when the solenoid length (L1) of the power transmission coil 450 is not less than about three times the displacement (Z = 100 mm).

したがって、送電コイル４５０のソレノイド長さ（Ｌ２）は、受電コイル２５０のソレノイド長さ（Ｌ１）よりも長い構成を採用することで、電力送電効率の低下を抑制することが可能となる。   Therefore, by adopting a configuration in which the solenoid length (L2) of the power transmission coil 450 is longer than the solenoid length (L1) of the power reception coil 250, it is possible to suppress a decrease in power transmission efficiency.

以上、各実施の形態について説明したが、今回開示された実施の形態はすべての点で例示であって制限的なものではない。本発明の技術的範囲は特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   Although the embodiments have been described above, the embodiments disclosed herein are illustrative and non-restrictive in every respect. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

１００ 電動車両、１１０ 車両本体、１２０ 車両ＥＣＵ、１３０ 整流器、１４０ ＤＣ／ＤＣコンバータ、１５０ バッテリ、１６０ パワーコントロールユニット（ＰＣＵ）、１７０ モータユニット、１８０，３２２ 通信部、２００ 受電装置、２１０ 受電部、２２０，４２０ コンデンサ、２６０，４６０ コアユニット、２６０Ａ 上面、２６０Ｂ 下面、２６０Ｃ，２６０Ｄ，２６０Ｅ，２６０Ｆ 側面、２５０ 受電コイル、３００ 外部給電装置、３１０ 高周波電力装置、３２０ 送電ＥＣＵ、３３０ 交流電源、４００ 送電装置、４５０ 送電コイル、１０００ 電力伝送システム、Ｏ２ コイル巻回軸、Ｐ１ 中心位置。   DESCRIPTION OF SYMBOLS 100 Electric vehicle, 110 Vehicle main body, 120 Vehicle ECU, 130 Rectifier, 140 DC / DC converter, 150 Battery, 160 Power control unit (PCU), 170 Motor unit, 180,322 Communication part, 200 Power receiving apparatus, 210 Power receiving part, 220, 420 capacitor, 260, 460 core unit, 260A upper surface, 260B lower surface, 260C, 260D, 260E, 260F side surface, 250 power receiving coil, 300 external power supply device, 310 high frequency power device, 320 power transmission ECU, 330 AC power source, 400 power transmission Device, 450 power transmission coil, 1000 power transmission system, O2 coil winding axis, P1 center position.

Claims (1)

送電部に対向した状態で前記送電部から非接触で電力を受電する受電部を有する電力伝送システムであって、
前記送電部は、送電コイルを含み、
前記受電部は、受電コイルを含み、
前記送電コイルのソレノイド長さは、前記受電コイルのソレノイド長さよりも長い、電力伝送システム。 A power transmission system having a power receiving unit that receives power in a non-contact manner from the power transmitting unit in a state of facing the power transmitting unit,
The power transmission unit includes a power transmission coil,
The power receiving unit includes a power receiving coil,
The power transmission system, wherein a solenoid length of the power transmission coil is longer than a solenoid length of the power reception coil.
JP2013259042A 2013-12-16 2013-12-16 Power transmission system Pending JP2015115580A (en)

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