JP2018198493A - Non-contact power transmission system - Google Patents

Non-contact power transmission system Download PDF

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JP2018198493A
JP2018198493A JP2017102398A JP2017102398A JP2018198493A JP 2018198493 A JP2018198493 A JP 2018198493A JP 2017102398 A JP2017102398 A JP 2017102398A JP 2017102398 A JP2017102398 A JP 2017102398A JP 2018198493 A JP2018198493 A JP 2018198493A
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power transmission
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JP6774379B2 (en
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卓也 岩本
Takuya Iwamoto
卓也 岩本
智明 中川
Tomoaki Nakagawa
智明 中川
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Honda Motor Co Ltd
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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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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Abstract

To provide a non-contact power transmission system in which positioning of a primary coil and a secondary coil can be further accurately performed.SOLUTION: A storage device 70 stores voltage value-position deviation amount information In indicative of the correspondence between a horizontal position deviation amount A2 obtained when a vertical position deviation amount A1 of a secondary coil 44 relative to a primary coil 28 is 0, and a voltage value V_LPE corresponding to the horizontal position deviation amount A2. A maximum value determination unit 64 determines a maximum value V_LPEmax of LPE voltage which varies in accordance with traveling of an electric vehicle 40. A deviation amount estimation unit 66 estimates the horizontal position deviation amount A2 corresponding to the maximum value V_LPEmax on the basis of the voltage value-position deviation amount information In and the maximum value V_LPEmax.SELECTED DRAWING: Figure 1

Description

本発明は、１次コイルと２次コイルとの間で電力を伝送する非接触電力伝送システムに関し、特に、１次コイルと２次コイルの位置合わせをするために送電側から受電側に微弱電力を伝送し、微弱電力の受電時に抵抗の両端に発生するＬＰＥ（Ｌｏｗ Ｐｏｗｅｒ Ｅｘｃｉｔａｔｉｏｎ）電圧を検出するものに関する。   The present invention relates to a non-contact power transmission system that transmits power between a primary coil and a secondary coil, and in particular, weak power from a power transmission side to a power reception side in order to align the primary coil and the secondary coil. And an LPE (Low Power Excitation) voltage generated at both ends of the resistor when receiving weak power.

電動車両、例えば電気自動車やハイブリッド自動車等の開発と共に、電動車両のバッテリを非接触で充電する非接触充電に関する技術も開発されている。非接触充電を効率的に行うためには、充電ステーションに設けられる１次コイルと電動車両に設けられる２次コイルの位置合わせを正確に行う必要がある。   Along with the development of electric vehicles such as electric vehicles and hybrid vehicles, a technology related to non-contact charging for charging the battery of the electric vehicle in a non-contact manner has also been developed. In order to efficiently perform non-contact charging, it is necessary to accurately align the primary coil provided in the charging station and the secondary coil provided in the electric vehicle.

１次コイルと２次コイルの位置合わせに関しては、例えば特許文献１に示されるような技術がある。特許文献１には、１次コイルと２次コイルの位置合わせの際に、車輪の位置を充電ステーション側に設けられる複数の近接センサで検出する装置が示される。この装置は、近接センサが電動車両の車輪を検出する場合と検出しない場合とで、充電ステーションに設けられる信号機の点灯状態を変えている。乗員は信号機の点灯状態を見つつ電動車両を操作し、１次コイルと２次コイルの位置合わせを行う。   Regarding the alignment of the primary coil and the secondary coil, for example, there is a technique as disclosed in Patent Document 1. Patent Document 1 discloses an apparatus that detects the position of a wheel with a plurality of proximity sensors provided on the charging station side when aligning a primary coil and a secondary coil. This device changes the lighting state of the traffic light provided in the charging station depending on whether the proximity sensor detects the wheel of the electric vehicle or not. The occupant operates the electric vehicle while observing the lighting state of the traffic light, and aligns the primary coil and the secondary coil.

特開２０１４−０９９９６４号公報（段落［００２４］−［００３１］）JP 2014-099964 A (paragraphs [0024]-[0031])

特許文献１の装置においては、１次コイルと２次コイルの位置合わせの際に、１次コイルに対する２次コイルの位置ずれ量が考慮されていない。このため、乗員が１次コイルと２次コイルの位置合わせを正確に行うことは困難である。   In the apparatus of Patent Document 1, the positional deviation amount of the secondary coil with respect to the primary coil is not taken into account when the primary coil and the secondary coil are aligned. For this reason, it is difficult for the occupant to accurately align the primary coil and the secondary coil.

本発明はこのような課題を考慮してなされたものであり、１次コイルと２次コイルの位置合わせをより正確に行うことができる非接触電力伝送システムを提供することを目的とする。   The present invention has been made in consideration of such problems, and an object of the present invention is to provide a non-contact power transmission system that can more accurately align the primary coil and the secondary coil.

本発明は、
充電ステーションの縦方向と電動車両の車長方向とが略平行し、且つ、前記充電ステーションの横方向と前記電動車両の車幅方向とが略平行する状態で、１次コイルから２次コイルに対して非接触で電力を伝送する非接触電力伝送システムであって、
前記１次コイルから送電され前記２次コイルで受電される微弱電力により発生する電圧を検出する電圧検出器と、
前記１次コイルに対する前記２次コイルの前記縦方向の位置ずれ量が０であるときの前記横方向の位置ずれ量と、前記横方向の位置ずれ量に応じた前記電圧の値と、の対応関係を示す電圧値−位置ずれ量情報を記憶する記憶装置と、
前記電動車両の走行に伴い変動する前記電圧の最大値を判定する最大値判定部と、
前記記憶装置に記憶される前記電圧値−位置ずれ量情報と、前記最大値判定部により判定される前記最大値と、に基づいて前記最大値に対応する前記横方向の位置ずれ量を推定するずれ量推定部と、を備える
ことを特徴とする。 The present invention
In a state where the longitudinal direction of the charging station is substantially parallel to the vehicle length direction of the electric vehicle and the lateral direction of the charging station is substantially parallel to the vehicle width direction of the electric vehicle, the primary coil is changed to the secondary coil. A non-contact power transmission system that transmits power in a non-contact manner,
A voltage detector for detecting a voltage generated by the weak power transmitted from the primary coil and received by the secondary coil;
Correspondence between the lateral displacement amount when the longitudinal displacement amount of the secondary coil with respect to the primary coil is 0 and the voltage value according to the lateral displacement amount A storage device for storing voltage value-position error information indicating the relationship;
A maximum value determination unit that determines the maximum value of the voltage that varies with the traveling of the electric vehicle;
The lateral displacement amount corresponding to the maximum value is estimated based on the voltage value-position displacement amount information stored in the storage device and the maximum value determined by the maximum value determination unit. And a deviation amount estimation unit.

上記構成によれば、記憶装置に記憶される電圧値−位置ずれ量情報と電圧検出器で検出される電圧の最大値とに基づいて１次コイルに対する２次コイルの横方向の位置ずれ量を容易に推定することができる。更に１次コイルに対する２次コイルの横方向の位置ずれ量を推定できるため、１次コイルと２次コイルの位置合わせをより正確に行うことができる。   According to the above configuration, the lateral displacement amount of the secondary coil with respect to the primary coil is determined based on the voltage value-position displacement amount information stored in the storage device and the maximum value of the voltage detected by the voltage detector. Can be easily estimated. Further, since the amount of lateral displacement of the secondary coil relative to the primary coil can be estimated, the primary coil and the secondary coil can be more accurately aligned.

本発明において、
前記ずれ量推定部により推定される前記横方向の位置ずれ量を報知装置で報知させる報知制御部を更に備えてもよい。 In the present invention,
You may further provide the alerting | reporting control part which alert | reports the amount of positional deviation of the said horizontal direction estimated by the said deviation | shift amount estimation part with an alerting | reporting apparatus.

上記構成によれば、乗員に１次コイルに対する２次コイルの横方向の位置ずれ量を報知することができる。このため、乗員は１次コイルと２次コイルの位置合わせを容易に行うことができる。   According to the above configuration, it is possible to notify the occupant of the amount of lateral displacement of the secondary coil with respect to the primary coil. For this reason, the occupant can easily align the primary coil and the secondary coil.

本発明において、
前記電動車両の走行距離を検出する距離センサを更に備え、
前記最大値判定部は、前記電圧検出器で検出される前記電圧の値と、前記距離センサで検出される前記電動車両の走行距離と、に基づいて、微小な走行距離に対する前記電圧の値の変化量である位置微分値を算出し、その位置微分値が０となるときの前記電圧の値を前記最大値と判定するようにしてもよい。 In the present invention,
A distance sensor for detecting a travel distance of the electric vehicle;
The maximum value determination unit is configured to determine the value of the voltage with respect to a minute travel distance based on the voltage value detected by the voltage detector and the travel distance of the electric vehicle detected by the distance sensor. A position differential value that is a change amount may be calculated, and the voltage value when the position differential value becomes 0 may be determined as the maximum value.

上記構成によれば、電圧値の位置微分値を演算するといった容易な手法により電圧の最大値を算出することができる。このため、１次コイルと２次コイルの位置合わせを容易に行うことができる。   According to the above configuration, the maximum value of the voltage can be calculated by an easy method such as calculating the position differential value of the voltage value. For this reason, alignment of a primary coil and a secondary coil can be performed easily.

本発明によれば、１次コイルに対する２次コイルの横方向の位置ずれ量を推定できるため、１次コイルと２次コイルの位置合わせをより正確に行うことができる。   According to the present invention, the amount of lateral displacement of the secondary coil with respect to the primary coil can be estimated, so that the primary coil and the secondary coil can be more accurately aligned.

図１は本実施形態に係る非接触電力伝送システムを示すシステム構成図である。FIG. 1 is a system configuration diagram showing a non-contact power transmission system according to the present embodiment. 図２は１次コイルに対する２次コイルの横方向の位置ずれの説明に供する説明図である。FIG. 2 is an explanatory diagram for explaining the lateral displacement of the secondary coil with respect to the primary coil. 図３は電圧値−水平距離の特性を示す図である。FIG. 3 is a graph showing the voltage value-horizontal distance characteristic. 図４は電動車両で行われる処理を示すフローチャートである。FIG. 4 is a flowchart showing processing performed in the electric vehicle. 図５Ａおよび図５Ｂは充電ステーションに対する電動車両の駐車動作の説明に供する説明図である。5A and 5B are explanatory views for explaining the parking operation of the electric vehicle with respect to the charging station.

以下、本発明に係る非接触電力伝送システムについて好適な実施形態を挙げ、添付の図面を参照して詳細に説明する。   Hereinafter, preferred embodiments of the non-contact power transmission system according to the present invention will be described in detail with reference to the accompanying drawings.

［１ 非接触電力伝送システム１０の構成］
図１を用いて第１実施形態に係る非接触電力伝送システム１０の構成を説明する。非接触電力伝送システム１０は、地面（設置面）に設けられる１次側（給電側）の充電ステーション２０と、２次側（受電側）の電動車両４０とで構成される。図１中、２点鎖線の下側の構成要素が充電ステーション２０を示し、２点鎖線の上側の構成要素が電動車両４０を示す。非接触電力伝送システム１０において、電動車両４０に搭載されるバッテリ５６は非接触で充電ステーション２０により充電される。 [1 Configuration of contactless power transmission system 10]
The structure of the non-contact electric power transmission system 10 which concerns on 1st Embodiment is demonstrated using FIG. The non-contact power transmission system 10 includes a primary (power feeding side) charging station 20 provided on the ground (installation surface) and a secondary (power receiving side) electric vehicle 40. In FIG. 1, the component below the two-dot chain line indicates the charging station 20, and the component above the two-dot chain line indicates the electric vehicle 40. In the non-contact power transmission system 10, the battery 56 mounted on the electric vehicle 40 is charged by the charging station 20 in a non-contact manner.

充電ステーション２０は、主として送電回路２２と、１次側制御装置３４と、１次側通信装置３６と、を備える。送電回路２２は、交流電源２４と、交流電源２４から供給される交流電力を送電電力に変換する電力変換器２６と、共振用の１次コンデンサ（不図示）および１次コイル２８と、を備える。１次コイル２８は、１次パッド３０で覆われて地面（設置面）に配置される。   The charging station 20 mainly includes a power transmission circuit 22, a primary side control device 34, and a primary side communication device 36. The power transmission circuit 22 includes an AC power source 24, a power converter 26 that converts AC power supplied from the AC power source 24 into transmitted power, and a primary capacitor for resonance (not shown) and a primary coil 28. . The primary coil 28 is covered with the primary pad 30 and disposed on the ground (installation surface).

１次側制御装置３４は、ＣＰＵ等のプロセッサ（不図示）が記憶装置（不図示）に格納されるプログラムを読み出して実行することで所定の動作部として機能する。第１実施形態において、１次側制御装置３４は、１次コイル２８と２次コイル４４の位置合わせのための微弱電力、および、バッテリ５６を充電するための充電電力を１次コイル２８に送電させる送電制御部として機能する。   The primary side control device 34 functions as a predetermined operation unit when a processor (not shown) such as a CPU reads and executes a program stored in a storage device (not shown). In the first embodiment, the primary-side controller 34 transmits weak power for positioning the primary coil 28 and the secondary coil 44 and charging power for charging the battery 56 to the primary coil 28. Functions as a power transmission control unit.

１次側通信装置３６は、１次側制御装置３４に対して通信線で接続される。１次側通信装置３６は、電動車両４０の２次側通信装置７４との間で無線通信を行う。例えば、Ｗｉ−Ｆｉ（登録商標）やＢｌｕｅｔｏｏｔｈ（登録商標）等の無線通信が使用可能である。   The primary side communication device 36 is connected to the primary side control device 34 by a communication line. The primary side communication device 36 performs wireless communication with the secondary side communication device 74 of the electric vehicle 40. For example, wireless communication such as Wi-Fi (registered trademark) or Bluetooth (registered trademark) can be used.

電動車両４０は、主として受電回路４２と、バッテリ５６と、２次側制御装置６０と、２次側通信装置７４と、表示装置７６と、音響装置７８と、距離センサ８０と、走行装置９０と、を備える。   The electric vehicle 40 mainly includes a power receiving circuit 42, a battery 56, a secondary side control device 60, a secondary side communication device 74, a display device 76, an acoustic device 78, a distance sensor 80, and a traveling device 90. .

受電回路４２は、共振用の２次コンデンサ（不図示）および２次コイル４４と、２次コイル４４で受電した交流電力である受電電力を整流する整流器５０と、受電回路４２とバッテリ５６との電気的接続／切断を切り替えるコンタクタ５４と、を備える。２次コイル４４は、２次パッド４６で覆われて電動車両４０の下面に配置される。   The power receiving circuit 42 includes a secondary capacitor (not shown) for resonance and a secondary coil 44, a rectifier 50 that rectifies received power that is AC power received by the secondary coil 44, and a power receiving circuit 42 and a battery 56. And a contactor 54 for switching electrical connection / disconnection. The secondary coil 44 is covered with the secondary pad 46 and disposed on the lower surface of the electric vehicle 40.

更に受電回路４２は、整流器５０とコンタクタ５４との間に接続自在である電圧検出器５２を備える。電圧検出器５２は、例えば、特許第５９３７６３１号公報に示されるように、所定の抵抗と電圧センサとの並列回路（いずれも不図示）を有する。電圧センサは微弱電力の受電時に抵抗の両端に発生する電圧を検出する。この電圧をＬＰＥ電圧という。微弱電力の受電時にスイッチ装置（不図示）が２次側制御装置６０の制御指示を受けて切替動作すると、電圧検出器５２は受電回路４２に接続される。なお、本実施形態では、充電時に使用する受電回路４２を利用してＬＰＥ電圧を検出するようにしているが、受電回路４２とは別に、ＬＰＥ電圧を検出するための回路を設け、そこに整流器と電圧検出器５２を設けるようにしてもよい。   The power receiving circuit 42 further includes a voltage detector 52 that can be connected between the rectifier 50 and the contactor 54. The voltage detector 52 includes, for example, a parallel circuit (not shown) of a predetermined resistance and a voltage sensor as disclosed in Japanese Patent No. 5937663. The voltage sensor detects a voltage generated at both ends of the resistor when receiving weak power. This voltage is called LPE voltage. When a switching device (not shown) receives a control instruction from the secondary side control device 60 and receives a weak power, the voltage detector 52 is connected to the power receiving circuit 42. In this embodiment, the LPE voltage is detected using the power receiving circuit 42 used at the time of charging. However, a circuit for detecting the LPE voltage is provided separately from the power receiving circuit 42, and a rectifier is provided there. And a voltage detector 52 may be provided.

バッテリ５６は、リチウムイオン電池等からなり、コンタクタ５４が接続状態にされ、１次コイル２８と２次コイル４４とが磁気結合されると、受電回路４２を介して充電される。   The battery 56 is composed of a lithium ion battery or the like, and is charged via the power receiving circuit 42 when the contactor 54 is in a connected state and the primary coil 28 and the secondary coil 44 are magnetically coupled.

２次側制御装置６０はＥＣＵであり、受電処理を管理する。２次側制御装置６０は、ＣＰＵ等のプロセッサ（不図示）が記憶装置７０に格納されるプログラムを読み出し実行することで、統括部６２と最大値判定部６４とずれ量推定部６６と報知制御部６８として機能する。   The secondary side control device 60 is an ECU and manages the power receiving process. The secondary-side control device 60 reads and executes a program stored in the storage device 70 by a processor such as a CPU (not shown), whereby the overall unit 62, the maximum value determination unit 64, the deviation amount estimation unit 66, and notification control It functions as the unit 68.

統括部６２は、受電処理を統括して管理する。最大値判定部６４は、電圧検出器５２で検出されるＬＰＥ電圧の値Ｖ＿ＬＰＥ（以下、電圧値Ｖ＿ＬＰＥという。）と、距離センサ８０で検出される電動車両４０の走行距離Ｘと、に基づいて、微小な走行距離Ｘ（単位時間当たりの走行距離Ｘ）に対する電圧値Ｖ＿ＬＰＥの変化量、すなわちＬＰＥ電圧に関する位置微分値ｄＶ／ｄＸを算出する。そして、その算出値が０となるときに電圧検出器５２で検出される電圧値Ｖ＿ＬＰＥを最大値（ピーク値）Ｖ＿ＬＰＥｍａｘと判定する。ずれ量推定部６６は、記憶装置７０に記憶される後述の電圧値−位置ずれ量情報Ｉｎと、最大値判定部６４により判定される最大値Ｖ＿ＬＰＥｍａｘと、に基づいて最大値Ｖ＿ＬＰＥｍａｘに対応する横方向の位置ずれ量Ａ２を推定する。報知制御部６８は、ずれ量推定部６６により推定される横方向の位置ずれ量Ａ２に応じた指令信号を出力し、横方向の位置ずれ量Ａ２を表示装置７６および音響装置７８で報知させる。   The supervision unit 62 supervises and manages power reception processing. Maximum value determination unit 64 is based on LPE voltage value V_LPE (hereinafter referred to as voltage value V_LPE) detected by voltage detector 52 and travel distance X of electric vehicle 40 detected by distance sensor 80. Then, a change amount of the voltage value V_LPE with respect to a minute travel distance X (travel distance X per unit time), that is, a position differential value dV / dX related to the LPE voltage is calculated. When the calculated value becomes 0, the voltage value V_LPE detected by the voltage detector 52 is determined as the maximum value (peak value) V_LPEmax. The deviation amount estimation unit 66 is based on a later-described voltage value-position deviation amount information In stored in the storage device 70 and the maximum value V_LPEmax determined by the maximum value determination unit 64, and corresponds to the maximum value V_LPEmax. A direction misalignment amount A2 is estimated. The notification control unit 68 outputs a command signal corresponding to the lateral displacement amount A2 estimated by the displacement amount estimation unit 66, and causes the display device 76 and the acoustic device 78 to notify the lateral displacement amount A2.

記憶装置７０は、各種プログラムおよび各種演算の際に使用される所定値、既定値等の他に、電圧値−位置ずれ量情報Ｉｎを記憶する。電圧値−位置ずれ量情報Ｉｎというのは、１次コイル２８に対する２次コイル４４の縦方向の位置ずれ量Ａ１が０であるときの横方向の位置ずれ量Ａ２と、横方向の位置ずれ量Ａ２に応じた電圧値Ｖ＿ＬＰＥと、の対応関係を示す情報である。電圧値−位置ずれ量情報Ｉｎに関しては下記［２］で更に説明する。   The storage device 70 stores voltage value-position shift amount information In in addition to predetermined values and predetermined values used in various programs and various calculations. The voltage value-position displacement amount information In is the amount of lateral displacement A2 when the amount of longitudinal displacement A1 of the secondary coil 44 with respect to the primary coil 28 is 0, and the amount of displacement in the lateral direction. This is information indicating a correspondence relationship with the voltage value V_LPE corresponding to A2. The voltage value-position shift amount information In will be further described in [2] below.

２次側通信装置７４は、２次側制御装置６０に対して通信線で接続される。２次側通信装置７４は、上述したように充電ステーション２０の１次側通信装置３６との間で無線通信を行う。   The secondary side communication device 74 is connected to the secondary side control device 60 via a communication line. The secondary side communication device 74 performs wireless communication with the primary side communication device 36 of the charging station 20 as described above.

表示装置７６は、２次側制御装置６０から出力される指令信号に応じて１次コイル２８と２次コイル４４の位置ずれ量Ａ２を示す情報を表示する。例えば、１次コイル２８と２次コイル４４の位置を模擬的に示す鳥瞰図や、１次コイル２８と２次コイル４４の位置ずれ量Ａ２自体を画面に表示する。音響装置７８は、２次側制御装置６０から出力される指令信号に応じて１次コイル２８と２次コイル４４の位置ずれ量Ａ２を示す情報をスピーカから出力する。   The display device 76 displays information indicating the positional deviation amount A2 between the primary coil 28 and the secondary coil 44 in accordance with a command signal output from the secondary side control device 60. For example, a bird's-eye view showing the positions of the primary coil 28 and the secondary coil 44 in a simulated manner and a positional deviation amount A2 between the primary coil 28 and the secondary coil 44 are displayed on the screen. The acoustic device 78 outputs information indicating the positional deviation amount A2 between the primary coil 28 and the secondary coil 44 from the speaker in response to the command signal output from the secondary side control device 60.

走行装置９０は、乗員が行うアクセルペダルの操作に応じて駆動力を発生させる駆動力装置の他に、乗員が行うステアリングホイールの操作に応じて操舵する操舵装置と、乗員が行うブレーキペダルの操作に応じて制動力を発生させる制動装置を含む。駆動力装置は、駆動源としてバッテリ５６から電力が供給される電動モータを含む。   The traveling device 90 includes a driving device that generates a driving force in response to an accelerator pedal operation performed by an occupant, a steering device that performs steering in response to an operation of a steering wheel performed by the occupant, and an operation of a brake pedal performed by the occupant. And a braking device that generates a braking force in response. The driving force device includes an electric motor to which electric power is supplied from a battery 56 as a driving source.

［２ 電圧値−位置ずれ量情報Ｉｎ］
充電ステーション２０の縦方向と電動車両４０の車長方向とが略平行し且つ１次コイル２８に対して２次コイル４４が縦方向に離れた状態で、電動車両４０が真っ直ぐに水平移動する場面を想定する。このとき、図２に示されるように、１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２が０であるとする。この場面で、１次コイル２８と２次コイル４４の水平距離Ｄと、電圧検出器５２で検出される電圧値Ｖ＿ＬＰＥと、は図３の曲線Ｂ１に示されるような関係にある。 [2 Voltage Value-Position Deviation Information In]
A scene in which the electric vehicle 40 moves horizontally in a state where the longitudinal direction of the charging station 20 and the vehicle length direction of the electric vehicle 40 are substantially parallel and the secondary coil 44 is separated from the primary coil 28 in the vertical direction. Is assumed. At this time, as shown in FIG. 2, it is assumed that the lateral displacement A2 of the secondary coil 44 with respect to the primary coil 28 is zero. In this scene, the horizontal distance D between the primary coil 28 and the secondary coil 44 and the voltage value V_LPE detected by the voltage detector 52 are in a relationship as shown by a curve B1 in FIG.

すなわち、電動車両４０が遠方から１次コイル２８に近づき、１次コイル２８から送電される微弱電力を２次コイル４４が受電できる位置｛水平距離Ｄ＝Ｄ１（位置ずれ量Ａ１＝Ｄ１）｝に達すると、電圧値Ｖ＿ＬＰＥが第１所定値Ｖ＿ＬＰＥ１から上昇を始める。電動車両４０が走行し水平距離Ｄが小さくなるにつれて電圧値Ｖ＿ＬＰＥは徐々に大きくなり、水平距離Ｄ＝Ｄ２（位置ずれ量Ａ１＝Ｄ２）の位置で極大値Ｖ＿ＬＰＥ２となる。更に電動車両４０が走行し水平距離Ｄが小さくなるにつれて電圧値Ｖ＿ＬＰＥは徐々に小さくなり、水平距離Ｄ＝Ｄ３（位置ずれ量Ａ１＝Ｄ３）の位置で極小値Ｖ＿ＬＰＥ３となる。更に電動車両４０が走行し水平距離Ｄが小さくなるにつれて電圧値Ｖ＿ＬＰＥは徐々に大きくなり、水平距離Ｄ＝０（位置ずれ量Ａ１＝０）の位置、すなわち２次コイル４４の中心４４ｃが１次コイル２８の中心２８ｃの上方位置に達したときに、最大値Ｖ＿ＬＰＥｍａｘ１となる。   That is, the electric vehicle 40 approaches the primary coil 28 from a distance, and the position {horizontal distance D = D1 (position shift amount A1 = D1)} where the secondary coil 44 can receive the weak power transmitted from the primary coil 28. When reaching, the voltage value V_LPE starts to rise from the first predetermined value V_LPE1. As the electric vehicle 40 travels and the horizontal distance D decreases, the voltage value V_LPE gradually increases and reaches a maximum value V_LPE2 at the position of the horizontal distance D = D2 (position shift amount A1 = D2). Further, as the electric vehicle 40 travels and the horizontal distance D decreases, the voltage value V_LPE gradually decreases, and reaches a minimum value V_LPE3 at the position of the horizontal distance D = D3 (position shift amount A1 = D3). Further, as the electric vehicle 40 travels and the horizontal distance D decreases, the voltage value V_LPE gradually increases, and the position of the horizontal distance D = 0 (the positional deviation amount A1 = 0), that is, the center 44c of the secondary coil 44 is the primary. When the upper position of the center 28c of the coil 28 is reached, the maximum value V_LPEmax1 is obtained.

次に電動車両４０が横方向にずれた状態で走行する場合を想定する。例えば、図２に示されるように１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２＝ａ（＞０）である場合、図３の曲線Ｂ２のように、電圧値Ｖ＿ＬＰＥは、位置ずれ量Ａ２＝０である場合の曲線Ｂ１よりも低くなる。１次コイル２８に対する２次コイル４４の縦方向の位置ずれ量Ａ１＝０のときの最大値Ｖ＿ＬＰＥｍａｘ２は、最大値Ｖ＿ＬＰＥｍａｘ１よりも低い。また、図２に示されるように１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２＝ｂ（＞ａ）である場合、図３の曲線Ｂ３のように、電圧値Ｖ＿ＬＰＥは、位置ずれ量Ａ２＝ａである場合の曲線Ｂ２よりも低くなる。１次コイル２８に対する２次コイル４４の縦方向の位置ずれ量Ａ１＝０のときの最大値Ｖ＿ＬＰＥｍａｘ３は、最大値Ｖ＿ＬＰＥｍａｘ１および最大値Ｖ＿ＬＰＥｍａｘ２よりも低い。このように、縦方向の位置ずれ量Ａ１＝０となるときに検出される最大値Ｖ＿ＬＰＥｍａｘは、１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２が大きくなるほど低くなる。記憶装置７０は、最大値Ｖ＿ＬＰＥｍａｘと横方向の位置ずれ量Ａ２との対応関係、例えば、Ａ２＝０とＶ＿ＬＰＥ＝Ｖ＿ＬＰＥｍａｘ１、Ａ２＝ａとＶ＿ＬＰＥ＝Ｖ＿ＬＰＥｍａｘ２、Ａ２＝ｂとＶ＿ＬＰＥ＝Ｖ＿ＬＰＥｍａｘ３等の情報を、電圧値−位置ずれ量情報Ｉｎとして記憶する。   Next, it is assumed that the electric vehicle 40 travels in a state shifted in the lateral direction. For example, as shown in FIG. 2, when the lateral displacement A2 = a (> 0) of the secondary coil 44 with respect to the primary coil 28, the voltage value V_LPE is expressed by the curve B2 in FIG. It becomes lower than the curve B1 in the case of the positional deviation amount A2 = 0. The maximum value V_LPEmax2 when the amount of positional deviation A1 = 0 in the vertical direction of the secondary coil 44 with respect to the primary coil 28 is lower than the maximum value V_LPEmax1. Further, as shown in FIG. 2, when the lateral displacement amount A2 = b (> a) of the secondary coil 44 with respect to the primary coil 28, the voltage value V_LPE is expressed as a curve B3 in FIG. It becomes lower than the curve B2 when the positional deviation amount A2 = a. The maximum value V_LPEmax3 when the amount of positional deviation A1 = 0 in the vertical direction of the secondary coil 44 with respect to the primary coil 28 is lower than the maximum value V_LPEmax1 and the maximum value V_LPEmax2. As described above, the maximum value V_LPEmax detected when the vertical displacement A1 = 0 becomes smaller as the lateral displacement A2 of the secondary coil 44 with respect to the primary coil 28 becomes larger. The storage device 70 stores the correspondence relationship between the maximum value V_LPEmax and the lateral displacement A2 such as A2 = 0 and V_LPE = V_LPEmax1, A2 = a and V_LPE = V_LPEmax2, A2 = b and V_LPE = V_LPEmax3. , Stored as voltage value-position error information In.

［３ 位置合わせ処理］
本実施形態は、電圧値Ｖ＿ＬＰＥの最大値Ｖ＿ＬＰＥｍａｘを検出することにより、１次コイル２８に対する２次コイル４４の縦方向の位置ずれ量Ａ１が０であると想定し、そのときの１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２を推定するものである。 [3 Positioning process]
In the present embodiment, by detecting the maximum value V_LPEmax of the voltage value V_LPE, it is assumed that the amount of vertical displacement A1 of the secondary coil 44 with respect to the primary coil 28 is 0, and the primary coil 28 at that time The amount of displacement A2 in the lateral direction of the secondary coil 44 is estimated.

図４を中心にして本実施形態に係る電動車両４０側で行われる位置合わせ処理を説明する。以下で説明する処理は、電動車両４０の乗員が駐車開始スイッチ（不図示）をオン操作した場合に行われる。図２、図５Ａに示されるように、例えば充電ステーション２０は線１５０で区画される。乗員は充電ステーション２０から離れた位置Ｐ１で駐車開始スイッチをオン操作し、電動車両４０を充電ステーション２０に向けて走行させる。駐車開始スイッチの操作信号は２次側制御装置６０に送信される。   The alignment process performed on the electric vehicle 40 side according to the present embodiment will be described with reference to FIG. The process described below is performed when an occupant of the electric vehicle 40 turns on a parking start switch (not shown). As shown in FIGS. 2 and 5A, for example, the charging station 20 is partitioned by a line 150. The occupant turns on the parking start switch at a position P1 away from the charging station 20 and causes the electric vehicle 40 to travel toward the charging station 20. The operation signal of the parking start switch is transmitted to the secondary side control device 60.

なお、乗員は、充電ステーション２０の縦方向と電動車両４０の車長方向とが略平行になり、且つ、充電ステーション２０の横方向と電動車両４０の車幅方向とが略平行になるように電動車両４０を操作する。そして、電動車両４０を略真っ直ぐ走行させて、１次コイル２８と２次コイル４４の位置合わせを行う。   Note that the occupant is such that the longitudinal direction of the charging station 20 and the vehicle length direction of the electric vehicle 40 are substantially parallel, and the lateral direction of the charging station 20 and the vehicle width direction of the electric vehicle 40 are substantially parallel. The electric vehicle 40 is operated. Then, the electric vehicle 40 is caused to travel substantially straight so that the primary coil 28 and the secondary coil 44 are aligned.

ステップＳ１において、統括部６２は、２次側通信装置７４に対して微弱電力の伝送要求を指示する。２次側通信装置７４は１次側通信装置３６と認証等のペアリングを行い、微弱電力の伝送要求信号を送信する。１次側制御装置３４は、１次側通信装置３６で受信される伝送要求信号に応じて電力変換器２６を制御して送電を開始させる。電力変換器２６は、交流電源２４から供給される交流電力を所定の微弱電力に変換して１次コイル２８に供給する。すると、１次コイル２８から外部に位置合わせ用の微弱電力が送電される。   In step S <b> 1, the overall unit 62 instructs the secondary side communication device 74 to transmit a weak power. The secondary side communication device 74 performs pairing such as authentication with the primary side communication device 36 and transmits a transmission request signal of weak power. The primary side control device 34 controls the power converter 26 according to the transmission request signal received by the primary side communication device 36 to start power transmission. The power converter 26 converts AC power supplied from the AC power source 24 into predetermined weak power and supplies it to the primary coil 28. Then, weak power for alignment is transmitted from the primary coil 28 to the outside.

ステップＳ２において、統括部６２は、電圧検出器５２により検出される電圧値Ｖ＿ＬＰＥが第１所定値Ｖ＿ＬＰＥ１以上であるか否か、すなわち図５Ａに示されるように２次コイル４４が微弱電力を受電可能な範囲Ｒ（水平距離Ｄ＝Ｄ１）に入ったか否かを判定する。第１所定値Ｖ＿ＬＰＥ１以上である場合、すなわち２次コイル４４が微弱電力を受電可能な範囲Ｒに入った場合（ステップＳ２：ＹＥＳ）、処理はステップＳ３に移行する。一方、第１所定値Ｖ＿ＬＰＥ１未満である場合、すなわち２次コイル４４が微弱電力を受電可能な範囲Ｒに入っていない場合（ステップＳ２：ＮＯ）、ステップＳ２の処理が繰り返し行われる。   In step S2, the overall unit 62 determines whether or not the voltage value V_LPE detected by the voltage detector 52 is equal to or higher than the first predetermined value V_LPE1, that is, the secondary coil 44 receives weak power as shown in FIG. 5A. It is determined whether or not a possible range R (horizontal distance D = D1) has been entered. When the value is equal to or greater than the first predetermined value V_LPE1, that is, when the secondary coil 44 enters a range R in which weak power can be received (step S2: YES), the process proceeds to step S3. On the other hand, when it is less than the first predetermined value V_LPE1, that is, when the secondary coil 44 is not in the range R in which the weak power can be received (step S2: NO), the process of step S2 is repeatedly performed.

ステップＳ２からステップＳ３に移行した場合、最大値判定部６４は、電圧検出器５２により検出される電圧値Ｖ＿ＬＰＥと距離センサ８０で検出される単位時間当たりの走行距離Ｘとに基づいて位置微分値ｄＶ／ｄＸを算出する。   When the process proceeds from step S2 to step S3, the maximum value determination unit 64 determines the position differential value based on the voltage value V_LPE detected by the voltage detector 52 and the travel distance X per unit time detected by the distance sensor 80. dV / dX is calculated.

ステップＳ４において、最大値判定部６４は、電圧値Ｖ＿ＬＰＥ、および、位置微分値ｄＶ／ｄＸを判定する。図３に示されるように、例えば、位置ずれ量Ａ２＝０の特性を示す曲線Ｂ１において、水平距離Ｄ＝Ｄ２と０の位置で、電圧値Ｖ＿ＬＰＥは極大値Ｖ＿ＬＰＥ２となり位置微分値ｄＶ／ｄＸが０となる。本実施形態では、最大値Ｖ＿ＬＰＥｍａｘを正しく判定するために、言い換えると、水平距離Ｄ＝Ｄ２の位置を縦方向の位置ずれ量Ａ１＝０の位置と判定しないようにするために、電圧値Ｖ＿ＬＰＥが最も大きくなる曲線Ｂ１における水平距離Ｄ＝Ｄ２の位置で検出される極大値Ｖ＿ＬＰＥ２を第２所定値として、記憶装置７０で記憶する。電圧値Ｖ＿ＬＰＥが第２所定値Ｖ＿ＬＰＥ２よりも大きく、且つ、位置微分値ｄＶ／ｄＸが０である場合（ステップＳ４：ＹＥＳ）、電圧値Ｖ＿ＬＰＥが最大値Ｖ＿ＬＰＥｍａｘであり、縦方向の位置ずれ量Ａ１＝０の位置であると推定して、処理はステップＳ５に移行する。一方、電圧値Ｖ＿ＬＰＥが第２所定値Ｖ＿ＬＰＥ２以下であるか、または、位置微分値ｄＶ／ｄＸが０でない場合（ステップＳ４：ＮＯ）、電圧値Ｖ＿ＬＰＥが最大値Ｖ＿ＬＰＥｍａｘでなく、縦方向の位置ずれ量Ａ１＝０の位置でないと推定して、処理はステップＳ３に戻る。   In step S4, the maximum value determination unit 64 determines the voltage value V_LPE and the position differential value dV / dX. As shown in FIG. 3, for example, in the curve B1 indicating the characteristic of the positional deviation amount A2 = 0, the voltage value V_LPE becomes the maximum value V_LPE2 at the position of the horizontal distance D = D2 and 0, and the position differential value dV / dX is 0. In the present embodiment, in order to correctly determine the maximum value V_LPEmax, in other words, in order not to determine the position of the horizontal distance D = D2 as the position of the vertical displacement A1 = 0, the voltage value V_LPE is The maximum value V_LPE2 detected at the position of the horizontal distance D = D2 in the largest curve B1 is stored in the storage device 70 as the second predetermined value. When the voltage value V_LPE is larger than the second predetermined value V_LPE2 and the position differential value dV / dX is 0 (step S4: YES), the voltage value V_LPE is the maximum value V_LPEmax and the positional deviation amount A1 in the vertical direction. = 0 and the process proceeds to step S5. On the other hand, if the voltage value V_LPE is equal to or smaller than the second predetermined value V_LPE2 or the position differential value dV / dX is not 0 (step S4: NO), the voltage value V_LPE is not the maximum value V_LPEmax but the vertical position shift. It is estimated that the position is not at the amount A1 = 0, and the process returns to step S3.

ステップＳ５において、ずれ量推定部６６は、記憶装置７０に記憶される電圧値−位置ずれ量情報Ｉｎを参照し、位置微分値ｄＶ／ｄＸが０となるときの電圧値Ｖ＿ＬＰＥに対応する位置ずれ量Ａ２を推定する。   In step S5, the shift amount estimation unit 66 refers to the voltage value-position shift amount information In stored in the storage device 70, and the position shift corresponding to the voltage value V_LPE when the position differential value dV / dX is 0. The amount A2 is estimated.

ステップＳ６において、報知制御部６８は、ずれ量推定部６６により推定された位置ずれ量Ａ２に基づいて表示装置７６および音響装置７８に報知を指示する指令信号を出力する。表示装置７６は、位置ずれ量Ａ２または１次コイル２８と２次コイル４４との鳥瞰図を画面に表示する。音響装置７８は、位置ずれ量Ａ２を報知する音声や位置ずれ量Ａ２に応じた信号音をスピーカから出力する。例えば、位置ずれ量Ａ２に応じて信号音の出力と停止の間隔を変化させる。   In step S <b> 6, the notification control unit 68 outputs a command signal that instructs the display device 76 and the acoustic device 78 to perform notification based on the positional deviation amount A <b> 2 estimated by the deviation amount estimation unit 66. The display device 76 displays a positional deviation amount A2 or a bird's eye view of the primary coil 28 and the secondary coil 44 on the screen. The acoustic device 78 outputs a sound for notifying the positional deviation amount A2 and a signal sound corresponding to the positional deviation amount A2 from the speaker. For example, the interval between the output of the signal sound and the stop is changed according to the positional deviation amount A2.

運転者は、表示装置７６および／または音響装置７８の報知により、位置ずれ量Ａ２を把握する。図５Ｂに示すように、１次コイル２８に対する２次コイル４４の位置ずれ量Ａ２が０になると、運転者は電動車両４０を駐車させて充電を開始する。一方、運転者が位置合わせ操作をやり直す場合は、ステップＳ２以降の処理が再び実行される。   The driver grasps the positional deviation amount A <b> 2 by notification from the display device 76 and / or the acoustic device 78. As shown in FIG. 5B, when the positional deviation amount A2 of the secondary coil 44 with respect to the primary coil 28 becomes 0, the driver parks the electric vehicle 40 and starts charging. On the other hand, when the driver redoes the alignment operation, the processes after step S2 are executed again.

［４ 実施形態のまとめ］
上述した実施形態に係る非接触電力伝送システム１０は、充電ステーション２０の縦方向と電動車両４０の車長方向とが略平行し、且つ、充電ステーション２０の横方向と電動車両４０の車幅方向とが略平行する状態で、１次コイル２８から２次コイル４４に対して非接触で電力を伝送する。非接触電力伝送システム１０は、１次コイル２８から送電され２次コイル４４で受電される微弱電力により発生するＬＰＥ電圧を検出する電圧検出器５２と、１次コイル２８に対する２次コイル４４の縦方向の位置ずれ量Ａ１が０であるときの横方向の位置ずれ量Ａ２と、横方向の位置ずれ量Ａ２に応じた電圧値Ｖ＿ＬＰＥと、の対応関係を示す電圧値−位置ずれ量情報Ｉｎを記憶する記憶装置７０と、電動車両４０の走行に伴い変動するＬＰＥ電圧の最大値Ｖ＿ＬＰＥｍａｘを判定する最大値判定部６４と、記憶装置７０に記憶される電圧値−位置ずれ量情報Ｉｎと、最大値判定部６４により判定される最大値Ｖ＿ＬＰＥｍａｘと、に基づいて最大値Ｖ＿ＬＰＥｍａｘに対応する横方向の位置ずれ量Ａ２を推定するずれ量推定部６６と、を備える。 [4 Summary of Embodiments]
In the non-contact power transmission system 10 according to the above-described embodiment, the longitudinal direction of the charging station 20 and the vehicle length direction of the electric vehicle 40 are substantially parallel, and the lateral direction of the charging station 20 and the vehicle width direction of the electric vehicle 40 are. Are transmitted in a non-contact manner from the primary coil 28 to the secondary coil 44. The non-contact power transmission system 10 includes a voltage detector 52 that detects an LPE voltage generated by the weak power transmitted from the primary coil 28 and received by the secondary coil 44, and the longitudinal direction of the secondary coil 44 relative to the primary coil 28. A voltage value-position error information In indicating a correspondence relationship between the position error A2 in the horizontal direction when the position error A1 in the direction is 0 and the voltage value V_LPE corresponding to the position error A2 in the horizontal direction. A storage device 70 that stores data, a maximum value determination unit 64 that determines a maximum value V_LPEmax of an LPE voltage that varies as the electric vehicle 40 travels, a voltage value-position shift amount information In that is stored in the storage device 70, and a maximum A displacement amount estimation unit 66 that estimates a lateral displacement amount A2 corresponding to the maximum value V_LPEmax based on the maximum value V_LPEmax determined by the value determination unit 64; Obtain.

上記構成によれば、記憶装置７０に記憶される電圧値−位置ずれ量情報Ｉｎと電圧検出器５２で検出されるＬＰＥ電圧の最大値Ｖ＿ＬＰＥｍａｘとに基づいて１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２を容易に推定することができる。更に１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２を推定できるため、１次コイル２８と２次コイル４４の位置合わせをより正確に行うことができる。   According to the above configuration, the secondary coil 44 with respect to the primary coil 28 based on the voltage value-position shift amount information In stored in the storage device 70 and the maximum value V_LPEmax of the LPE voltage detected by the voltage detector 52. The lateral displacement A2 can be easily estimated. Further, since the lateral displacement A2 of the secondary coil 44 with respect to the primary coil 28 can be estimated, the primary coil 28 and the secondary coil 44 can be more accurately aligned.

非接触電力伝送システム１０は、ずれ量推定部６６により推定される横方向の位置ずれ量Ａ２を報知装置としての表示装置７６および音響装置７８で報知させる報知制御部６８を備える。上記構成によれば、乗員に１次コイル２８に対する２次コイル４４の横方向の位置ずれ量Ａ２を報知することができる。このため、乗員は１次コイル２８と２次コイル４４の位置合わせを容易に行うことができる。   The non-contact power transmission system 10 includes a notification control unit 68 that notifies the lateral position deviation amount A2 estimated by the deviation amount estimation unit 66 using a display device 76 and an acoustic device 78 as a notification device. According to the above configuration, the occupant can be notified of the lateral displacement A2 of the secondary coil 44 with respect to the primary coil 28. Therefore, the occupant can easily align the primary coil 28 and the secondary coil 44.

非接触電力伝送システム１０は、電動車両４０の走行距離Ｘを検出する距離センサ８０を備える。最大値判定部６４は、電圧検出器５２で検出される電圧値Ｖ＿ＬＰＥと、距離センサ８０で検出される電動車両４０の走行距離Ｘと、に基づいて、微小な走行距離Ｘに対する電圧値Ｖ＿ＬＰＥの変化量である位置微分値ｄＶ／ｄＸを算出し、その位置微分値ｄＶ／ｄＸが０となるときの電圧値Ｖ＿ＬＰＥを最大値Ｖ＿ＬＰＥｍａｘと判定する。上記構成によれば、電圧値Ｖ＿ＬＰＥの位置微分値ｄＶ／ｄＸを演算するといった容易な手法によりＬＰＥ電圧の最大値Ｖ＿ＬＰＥｍａｘを算出することができる。このため、１次コイル２８と２次コイル４４の位置合わせを容易に行うことができる。   The non-contact power transmission system 10 includes a distance sensor 80 that detects a travel distance X of the electric vehicle 40. The maximum value determination unit 64 determines the voltage value V_LPE for a minute travel distance X based on the voltage value V_LPE detected by the voltage detector 52 and the travel distance X of the electric vehicle 40 detected by the distance sensor 80. A position differential value dV / dX that is a change amount is calculated, and the voltage value V_LPE when the position differential value dV / dX becomes 0 is determined as the maximum value V_LPEmax. According to the above configuration, the maximum value V_LPEmax of the LPE voltage can be calculated by an easy method such as calculating the position differential value dV / dX of the voltage value V_LPE. For this reason, the primary coil 28 and the secondary coil 44 can be easily aligned.

なお、本発明に係る非接触電力伝送システムは、上述の実施形態に限らず、本発明の要旨を逸脱することなく、種々の構成を採り得ることはもちろんである。例えば、本発明に係る非接触電力伝送システムは、操舵、駆動、制動のうちの少なくとも１つの制御を自動的に行う駐車支援装置または自動駐車装置（特開２０１５−０７４２６６号公報等）を備える車両にも使用することができる。   Note that the non-contact power transmission system according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention. For example, a non-contact power transmission system according to the present invention includes a parking assistance device or an automatic parking device (Japanese Patent Laid-Open No. 2015-074266, etc.) that automatically performs at least one of steering, driving, and braking. Can also be used.

１０…非接触電力伝送システム ２０…充電ステーション
２８…１次コイル ３４…１次側制御装置
４０…電動車両 ４４…２次コイル
５２…電圧検出器 ６４…最大値判定部
６６…ずれ量推定部 ６８…報知制御部
７０…記憶装置 ７６…表示装置
７８…音響装置 ８０…距離センサ DESCRIPTION OF SYMBOLS 10 ... Non-contact electric power transmission system 20 ... Charging station 28 ... Primary coil 34 ... Primary side control apparatus 40 ... Electric vehicle 44 ... Secondary coil 52 ... Voltage detector 64 ... Maximum value determination part 66 ... Deviation amount estimation part 68 ... Notification control unit 70 ... Storage device 76 ... Display device 78 ... Sound device 80 ... Distance sensor

Claims (3)

充電ステーションの縦方向と電動車両の車長方向とが略平行し、且つ、前記充電ステーションの横方向と前記電動車両の車幅方向とが略平行する状態で、１次コイルから２次コイルに対して非接触で電力を伝送する非接触電力伝送システムであって、
前記１次コイルから送電され前記２次コイルで受電される微弱電力により発生する電圧を検出する電圧検出器と、
前記１次コイルに対する前記２次コイルの前記縦方向の位置ずれ量が０であるときの前記横方向の位置ずれ量と、前記横方向の位置ずれ量に応じた前記電圧の値と、の対応関係を示す電圧値−位置ずれ量情報を記憶する記憶装置と、
前記電動車両の走行に伴い変動する前記電圧の最大値を判定する最大値判定部と、
前記記憶装置に記憶される前記電圧値−位置ずれ量情報と、前記最大値判定部により判定される前記最大値と、に基づいて前記最大値に対応する前記横方向の位置ずれ量を推定するずれ量推定部と、を備える
ことを特徴とする非接触電力伝送システム。 In a state where the longitudinal direction of the charging station is substantially parallel to the vehicle length direction of the electric vehicle and the lateral direction of the charging station is substantially parallel to the vehicle width direction of the electric vehicle, the primary coil is changed to the secondary coil. A non-contact power transmission system that transmits power in a non-contact manner,
A voltage detector for detecting a voltage generated by the weak power transmitted from the primary coil and received by the secondary coil;
Correspondence between the lateral displacement amount when the longitudinal displacement amount of the secondary coil with respect to the primary coil is 0 and the voltage value according to the lateral displacement amount A storage device for storing voltage value-position error information indicating the relationship;
A maximum value determination unit that determines the maximum value of the voltage that varies with the traveling of the electric vehicle;
The lateral displacement amount corresponding to the maximum value is estimated based on the voltage value-position displacement amount information stored in the storage device and the maximum value determined by the maximum value determination unit. A non-contact power transmission system comprising: a deviation amount estimation unit. 請求項１に記載の非接触電力伝送システムにおいて、
前記ずれ量推定部により推定される前記横方向の位置ずれ量を報知装置で報知させる報知制御部を更に備える
ことを特徴とする非接触電力伝送システム。 The contactless power transmission system according to claim 1,
A contactless power transmission system, further comprising: a notification control unit that notifies a notification device of the amount of lateral displacement estimated by the displacement amount estimation unit. 請求項１または２に記載の非接触電力伝送システムにおいて、
前記電動車両の走行距離を検出する距離センサを更に備え、
前記最大値判定部は、前記電圧検出器で検出される前記電圧の値と、前記距離センサで検出される前記電動車両の走行距離と、に基づいて、微小な走行距離に対する前記電圧の値の変化量である位置微分値を算出し、その位置微分値が０となるときの前記電圧の値を前記最大値と判定する
ことを特徴とする非接触電力伝送システム。 The contactless power transmission system according to claim 1 or 2,
A distance sensor for detecting a travel distance of the electric vehicle;
The maximum value determination unit is configured to determine the value of the voltage with respect to a minute travel distance based on the voltage value detected by the voltage detector and the travel distance of the electric vehicle detected by the distance sensor. A non-contact power transmission system, wherein a position differential value that is a change amount is calculated, and the value of the voltage when the position differential value becomes 0 is determined as the maximum value.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112389248A (en) * 2020-11-30 2021-02-23 中国科学院电工研究所 Non-contact power supply positioning method, system and device for electric automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010234878A (en) * 2009-03-30 2010-10-21 Aisin Aw Co Ltd Power receiving guide device, power receiving guide method and power receiving guide program
JP2011193671A (en) * 2010-03-16 2011-09-29 Toyota Motor Corp Vehicle
WO2011132272A1 (en) * 2010-04-21 2011-10-27 トヨタ自動車株式会社 Vehicle parking assistance device and electric vehicle equipped with same
JP2017028953A (en) * 2015-07-28 2017-02-02 株式会社デンソー Parking assist system
JP2017093129A (en) * 2015-11-09 2017-05-25 株式会社デンソー Non-contact power transmission device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010234878A (en) * 2009-03-30 2010-10-21 Aisin Aw Co Ltd Power receiving guide device, power receiving guide method and power receiving guide program
JP2011193671A (en) * 2010-03-16 2011-09-29 Toyota Motor Corp Vehicle
WO2011132272A1 (en) * 2010-04-21 2011-10-27 トヨタ自動車株式会社 Vehicle parking assistance device and electric vehicle equipped with same
JP2017028953A (en) * 2015-07-28 2017-02-02 株式会社デンソー Parking assist system
JP2017093129A (en) * 2015-11-09 2017-05-25 株式会社デンソー Non-contact power transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112389248A (en) * 2020-11-30 2021-02-23 中国科学院电工研究所 Non-contact power supply positioning method, system and device for electric automobile
CN112389248B (en) * 2020-11-30 2022-02-18 中国科学院电工研究所 Non-contact power supply positioning method, system and device for electric automobile

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