JP2021065065A - Wireless power feeding device - Google Patents

Wireless power feeding device Download PDF

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JP2021065065A
JP2021065065A JP2019189994A JP2019189994A JP2021065065A JP 2021065065 A JP2021065065 A JP 2021065065A JP 2019189994 A JP2019189994 A JP 2019189994A JP 2019189994 A JP2019189994 A JP 2019189994A JP 2021065065 A JP2021065065 A JP 2021065065A
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power
power receiving
coil
rotation angle
receiving device
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裕己 太田
Yuki Ota
裕己 太田
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Advics Co Ltd
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Advics Co Ltd
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Priority to JP2019189994A priority Critical patent/JP2021065065A/en
Priority to PCT/JP2020/038916 priority patent/WO2021075498A1/en
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    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • 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
    • H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
    • 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
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

To provide a wireless power feeding device, having a plurality of power reception devices, capable of suppressing an increase in the number of transmission coils.SOLUTION: In a vehicle 10, a transmission device 31 of a wireless power supply device 30 includes: a transmission coil 34; a susceptor 32 for supporting the transmission coil in a rotatable state; an actuator 36; a power feeding section 35 for feeding electric power to the transmission coil; and a power feeding control section 37 for adjusting a rotational angle of the transmission coil by controlling of the actuator. Each of power reception devices 40A, 40B of the wireless power supply device has a power reception coil 41. The power feeding control section makes rotational angles of the transmission coil different between when an induction voltage is generated by the power reception coil of the first power reception device 40A and when an induction voltage is generated by the power reception coil of the second power reception device 40B.SELECTED DRAWING: Figure 1

Description

本発明は、無線給電装置に関する。 The present invention relates to a wireless power feeding device.

特許文献１には、送電装置と、複数の受電装置とを備える無線給電装置の一例が記載されている。各受電装置は、受電コイルと、可変リアクタンス回路とを有している。また、送電装置には、給電されると磁界を発生する複数の送電コイルと、複数の可変リアクタンス回路とを有している。上記無線給電装置によれば、各リアクタンス回路のリアクタンスを調整することにより、各受電装置の受電コイルで誘起電圧を効率よく発生させることができる。 Patent Document 1 describes an example of a wireless power feeding device including a power transmitting device and a plurality of power receiving devices. Each power receiving device has a power receiving coil and a variable reactance circuit. Further, the power transmission device has a plurality of power transmission coils that generate a magnetic field when power is supplied, and a plurality of variable reactance circuits. According to the wireless power feeding device, the induced voltage can be efficiently generated in the power receiving coil of each power receiving device by adjusting the reactance of each reactance circuit.

特開２０１８−１０２０９３号公報JP-A-2018-102093

上記の無線給電装置にあっては、複数の受電装置の受電コイルで誘起電圧を発生させることができるものの、送電装置に複数の送電コイルを設ける必要がある。そして、受電装置の数が多いほど、送電コイルの数が多くなってしまう。 In the above wireless power feeding device, although the induced voltage can be generated by the power receiving coils of a plurality of power receiving devices, it is necessary to provide a plurality of power transmitting coils in the power transmitting device. The larger the number of power receiving devices, the larger the number of power transmission coils.

上記課題を解決するための無線給電装置は、送電装置と複数の受電装置とを備えている。前記送電装置は、給電されると磁界を発生する送電コイルと、前記送電コイルを回転可能な状態で支持する支持台と、前記送電コイルを回転させる際の動力源であるアクチュエータと、前記送電コイルに給電する給電部と、前記アクチュエータの制御により前記送電コイルの回転角を調整する給電制御部と、を有している。複数の前記受電装置は、前記給電部から前記送電コイルへの給電に伴う磁界の発生によって誘起電圧を発生する受電コイルをそれぞれ有している。複数の前記受電装置のうちの第１受電装置の前記受電コイルで発生する誘起電圧の大きさが複数の前記受電装置のうちの前記第１受電装置以外の他の受電装置の前記受電コイルで発生する誘起電圧の大きさよりも大きくなる前記送電コイルの回転角の領域を第１回転角領域とする。複数の前記受電装置のうちの第２受電装置の前記受電コイルで発生する誘起電圧の大きさが複数の前記受電装置のうちの前記第２受電装置以外の他の受電装置の前記受電コイルで発生する誘起電圧の大きさよりも大きくなる前記送電コイルの回転角の領域を第２回転角領域とする。この場合、前記給電制御部は、前記第１受電装置の前記受電コイルで誘起電圧を発生させるときには前記送電コイルの回転角を前記第１回転角領域内の角度とし、前記第２受電装置の前記受電コイルで誘起電圧を発生させるときには前記送電コイルの回転角を前記第２回転角領域内の角度とする。 The wireless power feeding device for solving the above problems includes a power transmitting device and a plurality of power receiving devices. The power transmission device includes a power transmission coil that generates a magnetic field when power is supplied, a support base that supports the power transmission coil in a rotatable state, an actuator that is a power source for rotating the power transmission coil, and the power transmission coil. It has a power supply control unit that feeds power to the power transmission coil and a power supply control unit that adjusts the rotation angle of the power transmission coil by controlling the actuator. Each of the plurality of power receiving devices has a power receiving coil that generates an induced voltage by generating a magnetic field accompanying the power feeding from the power feeding unit to the power transmission coil. The magnitude of the induced voltage generated by the power receiving coil of the first power receiving device among the plurality of power receiving devices is generated by the power receiving coil of a power receiving device other than the first power receiving device among the plurality of power receiving devices. The region of the rotation angle of the power transmission coil that is larger than the magnitude of the induced voltage is defined as the first rotation angle region. The magnitude of the induced voltage generated by the power receiving coil of the second power receiving device among the plurality of power receiving devices is generated by the power receiving coil of a power receiving device other than the second power receiving device among the plurality of power receiving devices. The region of the rotation angle of the power transmission coil that is larger than the magnitude of the induced voltage is defined as the second rotation angle region. In this case, when the power supply control unit generates an induced voltage with the power receiving coil of the first power receiving device, the rotation angle of the power transmission coil is set to an angle within the first rotation angle region, and the second power receiving device is said to have an angle of rotation. When the induced voltage is generated by the power receiving coil, the rotation angle of the power transmission coil is defined as an angle within the second rotation angle region.

上記構成によれば、１つの送電コイルの回転角を調整することにより、第１受電装置の受電コイルで効率よく誘起電圧を発生させたり、第２受電装置の受電コイルで効率よく誘起電圧を発生させたりすることができる。すなわち、複数の受電装置を備える無線給電装置において、送電コイルの数の増大を抑制できる。 According to the above configuration, by adjusting the rotation angle of one power transmission coil, the power receiving coil of the first power receiving device efficiently generates an induced voltage, or the power receiving coil of the second power receiving device efficiently generates an induced voltage. Can be made to. That is, in a wireless power feeding device including a plurality of power receiving devices, an increase in the number of power transmission coils can be suppressed.

第１実施形態の無線給電装置を備える車両の概略構成を示す図。The figure which shows the schematic structure of the vehicle which includes the wireless power feeding device of 1st Embodiment. 同無線給電装置の送電装置の概略構成を示す模式図。The schematic diagram which shows the schematic structure of the power transmission device of the wireless power supply device. 同無線給電装置の受電装置の概略構成を示す模式図。The schematic diagram which shows the schematic structure of the power receiving device of the wireless power feeding device. 同無線給電装置の作用図。Operation diagram of the wireless power supply device. 送電装置の給電制御部が実行する処理の流れを説明するフローチャート。A flowchart illustrating a flow of processing executed by a power supply control unit of a power transmission device. 第２実施形態の無線給電装置の一部の概略を示す図。The figure which shows the outline of a part of the wireless power feeding apparatus of 2nd Embodiment.

（第１実施形態）
以下、無線給電装置の第１実施形態を図１〜図５に従って説明する。
図１には、本実施形態の無線給電装置３０を搭載する車両１０が図示されている。車両１０は、複数の車輪１２，１３，１４，１５と、各車輪１２〜１５に対して個別に対応する複数の制動機構２０Ａ，２０Ｂとを備えている。各制動機構２０Ａ，２０Ｂは、対応する車輪１２〜１５と一体回転する回転体２１に摩擦材２２を押し付けることにより、車輪１２〜１５に摩擦制動力を付与することができる。図１に示す例では、４つの車輪１２〜１５のうち、車輪１２及び車輪１３に対しては制動機構２０Ａがそれぞれ設けられており、車輪１４及び車輪１５に対しては制動機構２０Ｂがそれぞれ設けられている。各制動機構２０Ｂは、電気モータ２３の駆動量に応じた摩擦制動力を車輪１４，１５に付与する電動式制動機構である。そのため、各制動機構２０Ｂには、電気モータ２３を制御するモータ制御部２４が設けられている。 (First Embodiment)
Hereinafter, the first embodiment of the wireless power feeding device will be described with reference to FIGS. 1 to 5.
FIG. 1 shows a vehicle 10 equipped with the wireless power feeding device 30 of the present embodiment. The vehicle 10 includes a plurality of wheels 12, 13, 14, 15 and a plurality of braking mechanisms 20A, 20B individually corresponding to the wheels 12 to 15. The braking mechanisms 20A and 20B can apply a friction braking force to the wheels 12 to 15 by pressing the friction material 22 against the rotating body 21 that rotates integrally with the corresponding wheels 12 to 15. In the example shown in FIG. 1, of the four wheels 12 to 15, a braking mechanism 20A is provided for each of the wheels 12 and 13, and a braking mechanism 20B is provided for each of the wheels 14 and 15. Has been done. Each braking mechanism 20B is an electric braking mechanism that applies frictional braking force corresponding to the driving amount of the electric motor 23 to the wheels 14 and 15. Therefore, each braking mechanism 20B is provided with a motor control unit 24 that controls the electric motor 23.

無線給電装置３０は、送電装置３１と、複数の受電装置４０Ａ，４０Ｂとを備えている。図１及び図２に示すように、送電装置３１は、車両１０の車体１１に固定されている支持台３２と、支持台３２に回転可能な状態で支持されている送電コイル３４とを備えている。支持台３２は、送電コイル３４の中心軸線３４ｂと直交する方向に延びる回転軸３３を回転可能な状態で支持している。例えば、回転軸３３は、車両上下方向に延びている。そして、回転軸３３に送電コイル３４が固定されている。そのため、送電コイル３４は、回転軸３３と一体回転する。つまり、送電コイル３４の回転軸線３４ａは、送電コイル３４の中心軸線３４ｂと直交している。言い換えると、送電コイル３４は、回転軸線３４ａに直交する仮想平面上で中心軸線３４ｂが回転できるように支持台３２に支持されている。 The wireless power feeding device 30 includes a power transmitting device 31 and a plurality of power receiving devices 40A and 40B. As shown in FIGS. 1 and 2, the power transmission device 31 includes a support base 32 fixed to the vehicle body 11 of the vehicle 10 and a power transmission coil 34 rotatably supported by the support base 32. There is. The support base 32 rotatably supports a rotating shaft 33 extending in a direction orthogonal to the central axis 34b of the power transmission coil 34. For example, the rotation shaft 33 extends in the vertical direction of the vehicle. Then, the power transmission coil 34 is fixed to the rotating shaft 33. Therefore, the power transmission coil 34 rotates integrally with the rotating shaft 33. That is, the rotation axis 34a of the power transmission coil 34 is orthogonal to the central axis 34b of the power transmission coil 34. In other words, the power transmission coil 34 is supported by the support base 32 so that the central axis 34b can rotate on a virtual plane orthogonal to the rotation axis 34a.

送電装置３１は、送電コイル３４に給電する給電部３５を備えている。給電部３５は、車載のバッテリ１６の直流電圧を交流電圧に変換する変換回路３５１を有している。そのため、送電コイル３４には交流電流が流れる。このように送電コイル３４に給電が行われると、送電コイル３４への給電に応じた磁界が発生する。すると、図２に破線矢印で示すように、送電コイル３４の内側を磁束が通るようになる。 The power transmission device 31 includes a power supply unit 35 that supplies power to the power transmission coil 34. The power feeding unit 35 has a conversion circuit 351 that converts the DC voltage of the vehicle-mounted battery 16 into an AC voltage. Therefore, an alternating current flows through the power transmission coil 34. When power is supplied to the power transmission coil 34 in this way, a magnetic field corresponding to the power supplied to the power transmission coil 34 is generated. Then, as shown by the broken line arrow in FIG. 2, the magnetic flux passes through the inside of the power transmission coil 34.

また、送電装置３１は、回転軸３３及び回転軸３３に固定されている送電コイル３４を回転させる際の動力源であるアクチュエータ３６と、アクチュエータ３６の制御により送電コイル３４の回転角θを調整する給電制御部３７とを備えている。アクチュエータ３６としては、例えば、電気モータを挙げることができる。給電制御部３７が実行する処理内容については後述する。 Further, the power transmission device 31 adjusts the rotation angle θ of the power transmission coil 34 by controlling the actuator 36, which is a power source for rotating the rotation shaft 33 and the power transmission coil 34 fixed to the rotation shaft 33, and the actuator 36. It includes a power supply control unit 37. Examples of the actuator 36 include an electric motor. The processing content executed by the power supply control unit 37 will be described later.

図３に示すように、各受電装置４０Ａ，４０Ｂは、受電コイル４１と、受電コイル４１で発生した誘起電圧によって充電される充電部４３とを有している。充電部４３は、電力を蓄えたり、電力を電力供給対象に供給したりするものである。充電部４３としては、例えば、コンデンサ及び二次電池を挙げることができる。 As shown in FIG. 3, each of the power receiving devices 40A and 40B has a power receiving coil 41 and a charging unit 43 charged by the induced voltage generated by the power receiving coil 41. The charging unit 43 stores electric power and supplies electric power to an electric power supply target. Examples of the charging unit 43 include a capacitor and a secondary battery.

受電コイル４１では、給電部３５から送電コイル３４への給電に伴う磁界の発生によって誘起電圧が発生する。送電コイル３４への給電時には、送電コイル３４に交流電流が供給されるため、受電コイル４１では交流電圧が誘起電圧として発生する。そこで、本実施形態では、各受電装置４０Ａ，４０Ｂは、受電コイル４１で発生した交流電圧を直流電圧に変換する整流回路４２を有している。そして、整流回路４２によって交流から直流に変換された電圧に基づき、充電部４３が充電される。 In the power receiving coil 41, an induced voltage is generated by the generation of a magnetic field accompanying the power feeding from the power feeding unit 35 to the power transmitting coil 34. When power is supplied to the power transmission coil 34, an alternating current is supplied to the power transmission coil 34, so that the power receiving coil 41 generates an alternating voltage as an induced voltage. Therefore, in the present embodiment, each of the power receiving devices 40A and 40B has a rectifier circuit 42 that converts the AC voltage generated by the power receiving coil 41 into a DC voltage. Then, the charging unit 43 is charged based on the voltage converted from alternating current to direct current by the rectifier circuit 42.

なお、図１に示すように、受電装置４０Ａ，４０Ｂは、制動機構２０Ｂに設けられている。すなわち、充電部４３は、制動機構２０Ｂの電源として機能する。そして、各制動機構２０Ｂでは、充電部４３からの給電によってモータ制御部２４を動作させたり、電気モータ２３を駆動させたりすることができる。図１に示す例では、車輪１４用の制動機構２０Ｂに第１受電装置４０Ａが設けられており、車輪１５用の制動機構２０Ｂに第２受電装置４０Ｂが設けられている。よって、車輪１４が「第１車輪」に相当し、車輪１５が「第２車輪」に相当する。 As shown in FIG. 1, the power receiving devices 40A and 40B are provided in the braking mechanism 20B. That is, the charging unit 43 functions as a power source for the braking mechanism 20B. Then, in each braking mechanism 20B, the motor control unit 24 can be operated or the electric motor 23 can be driven by the power supply from the charging unit 43. In the example shown in FIG. 1, the braking mechanism 20B for the wheel 14 is provided with the first power receiving device 40A, and the braking mechanism 20B for the wheel 15 is provided with the second power receiving device 40B. Therefore, the wheel 14 corresponds to the "first wheel" and the wheel 15 corresponds to the "second wheel".

無線給電の方式としては、電磁誘導方式及び磁界共鳴方式などを挙げることができる。ここでは、電磁誘導方式で受電装置４０Ａ，４０Ｂの受電コイル４１に誘起電圧を発生させる場合について説明する。 Examples of the wireless power feeding method include an electromagnetic induction method and a magnetic field resonance method. Here, a case where an induced voltage is generated in the power receiving coil 41 of the power receiving devices 40A and 40B by the electromagnetic induction method will be described.

電磁誘導方式では、送電コイル３４への給電によって発生した磁束を受電コイル４１の内側を通過させることにより、受電コイル４１で誘起電圧を発生させることができる。送電コイル３４への給電によって発生した磁束を受電コイル４１の内側を通過させるには、送電コイル３４の中心軸線３４ｂと、受電コイル４１の中心軸線４１ａとの位置合わせを行う必要がある。 In the electromagnetic induction method, the induced voltage can be generated in the power receiving coil 41 by passing the magnetic flux generated by the power supply to the power transmission coil 34 inside the power receiving coil 41. In order for the magnetic flux generated by the power supply to the power transmission coil 34 to pass through the inside of the power reception coil 41, it is necessary to align the central axis 34b of the power transmission coil 34 with the center axis 41a of the power reception coil 41.

無線給電の方式として電磁誘導方式を採用する場合、送電コイル３４と各受電コイル４１とを図４に示すように配置することが好ましい。図４では、受電コイル４１の中心軸線４１ａが一点鎖線で示されている。そして、送電コイル３４の回転軸線３４ａが、各受電コイル４１の中心軸線４１ａと直交している。また、各受電コイル４１の中心軸線４１ａが交差する点を規定点Ｐ１とした場合、送電コイル３４の回転軸線３４ａが規定点Ｐ１上に位置している。さらに、回転軸線３４ａに直交する上記仮想平面に中心軸線３４ｂ，４１ａが沿うように、送電コイル３４及び各受電コイル４１がそれぞれ配置されている。 When the electromagnetic induction method is adopted as the wireless power feeding method, it is preferable to arrange the power transmission coil 34 and each power receiving coil 41 as shown in FIG. In FIG. 4, the central axis 41a of the power receiving coil 41 is indicated by a long-dotted chain line. The rotation axis 34a of the power transmission coil 34 is orthogonal to the central axis 41a of each power reception coil 41. Further, when the point where the central axis 41a of each power receiving coil 41 intersects is set as the specified point P1, the rotating axis 34a of the power transmission coil 34 is located on the specified point P1. Further, the power transmission coil 34 and each power receiving coil 41 are arranged so that the central axes 34b and 41a are aligned with the virtual plane orthogonal to the rotation axis 34a.

これにより、図４に示すように、送電コイル３４の回転角θを第１回転角θ１とすることにより、第１受電装置４０Ａの受電コイル４１の中心軸線４１ａの延長線上に、送電コイル３４の中心軸線３４ｂを配置することができる。また、送電コイル３４の回転角θを第２回転角θ２とすることにより、第２受電装置４０Ｂの受電コイル４１の中心軸線４１ａの延長線上に、送電コイル３４の中心軸線３４ｂを配置することができる。 As a result, as shown in FIG. 4, by setting the rotation angle θ of the power transmission coil 34 to the first rotation angle θ1, the power transmission coil 34 is placed on the extension line of the central axis 41a of the power reception coil 41 of the first power receiving device 40A. The central axis 34b can be arranged. Further, by setting the rotation angle θ of the power transmission coil 34 to the second rotation angle θ2, the central axis 34b of the power transmission coil 34 can be arranged on the extension line of the central axis 41a of the power receiving coil 41 of the second power receiving device 40B. it can.

図４に示す第１回転角領域Ｒ１とは、第１回転角θ１を含む送電コイル３４の回転角θの領域である。回転角θが第１回転角領域Ｒ１内の回転角である状況下で送電コイル３４に給電が行われた場合では、第１受電装置４０Ａの受電コイル４１で発生する誘起電圧の大きさが第１受電装置４０Ａ以外の他の受電装置の受電コイル４１で発生する誘起電圧の大きさよりも大きくなる。なお、第１回転角領域Ｒ１の上限となる回転角及び下限となる回転角の双方は、実験やシミュレーションなどによって予め設定される。 The first rotation angle region R1 shown in FIG. 4 is a region of the rotation angle θ of the power transmission coil 34 including the first rotation angle θ1. When power is supplied to the power transmission coil 34 under the condition that the rotation angle θ is the rotation angle within the first rotation angle region R1, the magnitude of the induced voltage generated by the power receiving coil 41 of the first power receiving device 40A is the first. 1 It becomes larger than the magnitude of the induced voltage generated in the power receiving coil 41 of the power receiving device other than the power receiving device 40A. Both the upper limit rotation angle and the lower limit rotation angle of the first rotation angle region R1 are preset by experiments, simulations, and the like.

また、図４に示す第２回転角領域Ｒ２とは、第２回転角θ２を含む送電コイル３４の回転角θの領域である。回転角θが第２回転角領域Ｒ２内の回転角である状況下で送電コイル３４に給電が行われた場合では、第２受電装置４０Ｂの受電コイル４１で発生する誘起電圧の大きさが第２受電装置４０Ｂ以外の他の受電装置の受電コイル４１で発生する誘起電圧の大きさよりも大きくなる。なお、第２回転角領域Ｒ２の上限となる回転角及び下限となる回転角の双方は、実験やシミュレーションなどによって予め設定される。 The second rotation angle region R2 shown in FIG. 4 is a region of the rotation angle θ of the power transmission coil 34 including the second rotation angle θ2. When power is supplied to the power transmission coil 34 under the condition that the rotation angle θ is the rotation angle in the second rotation angle region R2, the magnitude of the induced voltage generated in the power receiving coil 41 of the second power receiving device 40B is the first. 2 The magnitude of the induced voltage generated by the power receiving coil 41 of the power receiving device other than the power receiving device 40B is larger than that of the power receiving coil 41. Both the upper limit rotation angle and the lower limit rotation angle of the second rotation angle region R2 are preset by experiments, simulations, and the like.

次に、図５を参照し、各受電装置４０Ａ，４０Ｂの少なくとも１つで充電部４３に充電させる際に送電装置３１の給電制御部３７が実行する処理の流れについて説明する。
まずはじめに、ステップＳ１１において、充電対象となる充電部４３を有する受電装置４０Ａ，４０Ｂが決定される。以降の記載において、充電対象となる充電部４３を有する受電装置のことを、「対象受電装置」ともいう。対象受電装置が決定されると、次のステップＳ１２において、対象受電装置と送電装置３１との間で無線給電を行うための準備処理が実行される。すなわち、アクチュエータ３６の駆動を通じて送電コイル３４を回転させることにより、送電コイル３４の回転角θが、対象受電装置に応じた角度に調整される。例えば対象受電装置が第１受電装置４０Ａである場合、送電コイル３４の回転角θが、第１回転角領域Ｒ１内の角度とされる。この際、回転角θは、第１回転角領域Ｒ１内の角度であれば第１回転角θ１と等しくなくてもよい。しかし、最良の形態は、回転角θを第１回転角θ１と等しくすることである。 Next, with reference to FIG. 5, a flow of processing executed by the power supply control unit 37 of the power transmission device 31 when charging the charging unit 43 with at least one of the power receiving devices 40A and 40B will be described.
First, in step S11, the power receiving devices 40A and 40B having the charging unit 43 to be charged are determined. In the following description, a power receiving device having a charging unit 43 to be charged is also referred to as a “target power receiving device”. When the target power receiving device is determined, in the next step S12, a preparatory process for wirelessly supplying power between the target power receiving device and the power transmission device 31 is executed. That is, by rotating the power transmission coil 34 through the drive of the actuator 36, the rotation angle θ of the power transmission coil 34 is adjusted to an angle corresponding to the target power receiving device. For example, when the target power receiving device is the first power receiving device 40A, the rotation angle θ of the power transmission coil 34 is set as the angle within the first rotation angle region R1. At this time, the rotation angle θ does not have to be equal to the first rotation angle θ1 as long as it is an angle within the first rotation angle region R1. However, the best form is to make the rotation angle θ equal to the first rotation angle θ1.

準備処理が終了されると、処理が次のステップＳ１３に移行される。ステップＳ１３において、対象受電装置の充電部４３を充電させる無線充電処理が実行される。すなわち、無線充電処理では、送電コイル３４に給電が行われる。無線充電処理の終了条件が成立すると、無線充電処理が終了される。そして、一連の処理が終了される。 When the preparatory process is completed, the process proceeds to the next step S13. In step S13, a wireless charging process for charging the charging unit 43 of the target power receiving device is executed. That is, in the wireless charging process, power is supplied to the power transmission coil 34. When the end condition of the wireless charging process is satisfied, the wireless charging process is terminated. Then, a series of processing is completed.

なお、無線充電処理の終了条件としては、例えば、送電コイル３４への給電の継続時間が所定時間以上になったこと、及び、対象受電装置の充電部４３の充電量が所定充電量以上になったことを挙げることができる。 The conditions for ending the wireless charging process include, for example, that the duration of power supply to the power transmission coil 34 exceeds a predetermined time, and that the charging amount of the charging unit 43 of the target power receiving device exceeds the predetermined charging amount. I can mention that.

次に、本実施形態の無線給電装置の使用例について説明する。
第１使用例では、対象受電装置が順番に変更される。例えば、第１受電装置４０Ａを対象受電装置とし、無線充電処理が実行される。すると、送電装置３１では、給電部３５によって送電コイル３４に交流電流が流れるようになる。その結果、第１受電装置４０Ａでは、受電コイル４１に誘起電圧が発生する。これにより、第１受電装置４０Ａの充電部４３が充電される。そして、第１受電装置４０Ａに対する無線充電処理の終了条件が成立すると、送電コイル３４への給電が終了され、対象受電装置が第２受電装置４０Ｂに変更される。そして、無線充電処理が実行される。すると、送電装置３１では、給電部３５によって送電コイル３４に交流電流が流れるようになるため、第２受電装置４０Ｂでは、受電コイル４１に誘起電圧が発生する。これにより、第２受電装置４０Ｂの充電部４３が充電される。そして、第２受電装置４０Ｂに対する無線充電処理の終了条件が成立すると、送電コイル３４への給電が終了され、対象受電装置が第１受電装置４０Ａに変更される。こうした処理が繰り返し実行される。 Next, an example of using the wireless power feeding device of this embodiment will be described.
In the first use example, the target power receiving device is changed in order. For example, the wireless charging process is executed with the first power receiving device 40A as the target power receiving device. Then, in the power transmission device 31, an alternating current flows through the power transmission coil 34 by the power supply unit 35. As a result, in the first power receiving device 40A, an induced voltage is generated in the power receiving coil 41. As a result, the charging unit 43 of the first power receiving device 40A is charged. Then, when the end condition of the wireless charging process for the first power receiving device 40A is satisfied, the power supply to the power transmission coil 34 is terminated, and the target power receiving device is changed to the second power receiving device 40B. Then, the wireless charging process is executed. Then, in the power transmission device 31, an alternating current flows through the power transmission coil 34 by the power supply unit 35, so that an induced voltage is generated in the power reception coil 41 in the second power reception device 40B. As a result, the charging unit 43 of the second power receiving device 40B is charged. Then, when the end condition of the wireless charging process for the second power receiving device 40B is satisfied, the power supply to the power transmission coil 34 is terminated, and the target power receiving device is changed to the first power receiving device 40A. Such processing is repeatedly executed.

なお、各充電部４３における蓄電量を監視することができる場合、第１使用例ではなく、以下に示す第２使用例を採用してもよい。第２使用例では、蓄電量が閾値未満となった充電部４３がある場合、当該充電部４３を有する受電装置が対象受電装置に決定される。そして、当該受電装置と送電装置３１との間で無線給電が行われ、ひいては当該受電装置の充電部４３の充電が行われる。この場合、蓄電量が閾値未満となる充電部４３がないときには、図５に示した一連の処理が実行されないこととなる。 If the amount of electricity stored in each charging unit 43 can be monitored, the second usage example shown below may be adopted instead of the first usage example. In the second use example, when there is a charging unit 43 whose storage amount is less than the threshold value, the power receiving device having the charging unit 43 is determined as the target power receiving device. Then, wireless power is supplied between the power receiving device and the power transmitting device 31, and eventually the charging unit 43 of the power receiving device is charged. In this case, when there is no charging unit 43 whose storage amount is less than the threshold value, the series of processes shown in FIG. 5 is not executed.

本実施形態の作用及び効果について説明する。
（１）本実施形態では、１つの送電コイル３４の回転角θを調整することにより、第１受電装置４０Ａの充電部４３を充電させたり、第２受電装置４０Ｂの充電部４３を充電させたりすることができる。すなわち、第１受電装置４０Ａの充電部４３を充電させる場合、送電コイル３４の回転角θが第１回転角領域Ｒ１内の角度とされ、その上で送電コイル３４に給電が行われる。これにより、第１受電装置４０Ａの受電コイル４１で誘起電圧が発生し、当該誘起電圧に基づいて充電部４３が充電される。なお、この際、第２受電装置４０Ｂの受電コイル４１でも誘起電圧が発生することがある。しかし、この場合、第２受電装置４０Ｂでの誘起電圧の大きさは、第１受電装置４０Ａでの誘起電圧の大きさよりも小さいため、第２受電装置４０Ｂの充電部４３の充電量は第１受電装置４０Ａの充電部４３の充電量よりも少ない。 The operation and effect of this embodiment will be described.
(1) In the present embodiment, by adjusting the rotation angle θ of one power transmission coil 34, the charging unit 43 of the first power receiving device 40A can be charged, or the charging unit 43 of the second power receiving device 40B can be charged. can do. That is, when charging the charging unit 43 of the first power receiving device 40A, the rotation angle θ of the power transmission coil 34 is set to an angle within the first rotation angle region R1, and power is supplied to the power transmission coil 34 on that angle. As a result, an induced voltage is generated in the power receiving coil 41 of the first power receiving device 40A, and the charging unit 43 is charged based on the induced voltage. At this time, an induced voltage may also be generated in the power receiving coil 41 of the second power receiving device 40B. However, in this case, since the magnitude of the induced voltage in the second power receiving device 40B is smaller than the magnitude of the induced voltage in the first power receiving device 40A, the charge amount of the charging unit 43 of the second power receiving device 40B is the first. It is less than the charge amount of the charging unit 43 of the power receiving device 40A.

一方、第２受電装置４０Ｂの充電部４３を充電させる場合、送電コイル３４の回転角θが第２回転角領域Ｒ２内の角度とされ、その上で送電コイル３４に給電が行われる。これにより、第２受電装置４０Ｂの受電コイル４１で誘起電圧が発生し、当該誘起電圧によって充電部４３が充電される。なお、この際、第１受電装置４０Ａの受電コイル４１でも誘起電圧が発生することがある。しかし、この場合、第１受電装置４０Ａでの誘起電圧の大きさは、第２受電装置４０Ｂでの誘起電圧の大きさよりも小さいため、第１受電装置４０Ａの充電部４３の充電量は第２受電装置４０Ｂの充電部４３の充電量よりも少ない。 On the other hand, when charging the charging unit 43 of the second power receiving device 40B, the rotation angle θ of the power transmission coil 34 is set to an angle within the second rotation angle region R2, and power is supplied to the power transmission coil 34 on that angle. As a result, an induced voltage is generated in the power receiving coil 41 of the second power receiving device 40B, and the charging unit 43 is charged by the induced voltage. At this time, an induced voltage may also be generated in the power receiving coil 41 of the first power receiving device 40A. However, in this case, since the magnitude of the induced voltage in the first power receiving device 40A is smaller than the magnitude of the induced voltage in the second power receiving device 40B, the charge amount of the charging unit 43 of the first power receiving device 40A is the second. It is less than the charge amount of the charging unit 43 of the power receiving device 40B.

したがって、無線給電装置３０を複数の受電装置４０Ａ，４０Ｂを備える構成にしても、送電コイル３４の数の増大を抑制できる。より詳しくは、１つの送電コイル３４でもって複数の受電装置４０Ａ，４０Ｂで充電を行わせることができる。 Therefore, even if the wireless power feeding device 30 is configured to include a plurality of power receiving devices 40A and 40B, an increase in the number of power transmission coils 34 can be suppressed. More specifically, one power transmission coil 34 can be used to charge a plurality of power receiving devices 40A and 40B.

（２）送電コイル３４の回転軸線３４ａは、送電コイル３４の中心軸線３４ｂ及び各受電コイル４１の中心軸線４１ａと直交している。そのため、回転角θを調整することにより、受電コイル４１の中心軸線４１ａ上に送電コイル３４の中心軸線３４ｂを重ねやすくなる。すなわち、対象受電装置の受電コイル４１において効率よく誘起電圧を発生させることができ、ひいては対象受電装置の充電部４３を効率よく充電させることができる。 (2) The rotating axis 34a of the power transmission coil 34 is orthogonal to the central axis 34b of the power transmission coil 34 and the central axis 41a of each power receiving coil 41. Therefore, by adjusting the rotation angle θ, it becomes easy to superimpose the central axis 34b of the power transmission coil 34 on the central axis 41a of the power receiving coil 41. That is, the induced voltage can be efficiently generated in the power receiving coil 41 of the target power receiving device, and the charging unit 43 of the target power receiving device can be efficiently charged.

（３）本実施形態では、送電コイル３４を回転させることにより、第１受電装置４０Ａの充電部４３を充電させたり、第２受電装置４０Ｂの充電部４３を充電させたりしている。すなわち、送電コイル３４を車両１０内でスライド移動させたりするわけではない。そのため、車両１０という限られたスペース内でも、充電対象となる充電部４３を適宜切り替えることができる。 (3) In the present embodiment, the charging unit 43 of the first power receiving device 40A is charged or the charging unit 43 of the second power receiving device 40B is charged by rotating the power transmission coil 34. That is, the power transmission coil 34 is not slid and moved in the vehicle 10. Therefore, even within the limited space of the vehicle 10, the charging unit 43 to be charged can be appropriately switched.

（第２実施形態）
次に、無線給電装置の第２実施形態を図６に従って説明する。以下の説明においては、第１実施形態と相違している部分について主に説明するものとし、第１実施形態と同一又は相当する部材構成には同一符号を付して重複説明を省略するものとする。 (Second Embodiment)
Next, a second embodiment of the wireless power feeding device will be described with reference to FIG. In the following description, the parts that are different from the first embodiment will be mainly described, and the same or corresponding member configurations as those in the first embodiment will be designated by the same reference numerals and duplicate description will be omitted. To do.

図６に示すように、本実施形態の無線給電装置３０は、送電装置３１、第１受電装置４０Ａ及び第２受電装置４０Ｂに加え、第３受電装置４０Ｃと中継装置５０とを備えている。例えば、第３受電装置４０Ｃは、送電装置３１から見て第１受電装置４０Ａ及び第２受電装置４０Ｂよりも離れた位置に配置されている。なお、第３受電装置４０Ｃの構成は第１受電装置４０Ａ及び第２受電装置４０Ｂの構成と略同等であるため、第３受電装置４０Ｃの構成についての説明は割愛する。 As shown in FIG. 6, the wireless power feeding device 30 of the present embodiment includes a third power receiving device 40C and a relay device 50 in addition to the power transmitting device 31, the first power receiving device 40A, and the second power receiving device 40B. For example, the third power receiving device 40C is arranged at a position farther from the first power receiving device 40A and the second power receiving device 40B when viewed from the power transmitting device 31. Since the configuration of the third power receiving device 40C is substantially the same as the configuration of the first power receiving device 40A and the second power receiving device 40B, the description of the configuration of the third power receiving device 40C is omitted.

中継装置５０は、中継コイル５１を有している。中継コイル５１は、給電部３５から送電コイル３４への給電に伴う磁界の発生によって誘起電圧を発生することができるものである。中継コイル５１の中心軸線５１ａは、送電装置３１の送電コイル３４の回転軸線３４ａと直交している。また、中継コイル５１は、第３受電装置４０Ｃの受電コイル４１との間で無線給電が可能な状態で配置されている。すなわち、中継コイル５１に電流が流れることによって磁界が発生したときに、当該磁界の影響によって第３受電装置４０Ｃの受電コイル４１で誘起電圧が発生するように、中継コイル５１が配置されている。 The relay device 50 has a relay coil 51. The relay coil 51 can generate an induced voltage by generating a magnetic field accompanying power feeding from the power feeding unit 35 to the power transmission coil 34. The central axis 51a of the relay coil 51 is orthogonal to the rotation axis 34a of the power transmission coil 34 of the power transmission device 31. Further, the relay coil 51 is arranged in a state where wireless power supply is possible with the power receiving coil 41 of the third power receiving device 40C. That is, the relay coil 51 is arranged so that when a magnetic field is generated by the current flowing through the relay coil 51, an induced voltage is generated in the power receiving coil 41 of the third power receiving device 40C due to the influence of the magnetic field.

なお、本実施形態では、送電コイル３４の回転角θを第３回転角θ３とすることにより、中継コイル５１の中心軸線５１ａの延長線上に、送電コイル３４の中心軸線３４ｂを配置することができる。図６に示す第３回転角領域Ｒ３とは、第３回転角θ３を含む送電コイル３４の回転角θの領域である。回転角θが第３回転角領域Ｒ３内の回転角である状況下で送電コイル３４に給電が行われた場合、第３受電装置４０Ｃの受電コイル４１で発生する誘起電圧の大きさが、第１受電装置４０Ａの受電コイル４１で発生する誘起電圧の大きさ及び第２受電装置４０Ｂの受電コイル４１で発生する誘起電圧の大きさの双方よりも大きくできる。なお、第３回転角領域Ｒ３の上限となる回転角及び下限となる回転角の双方は、実験やシミュレーションなどによって予め設定される。 In the present embodiment, by setting the rotation angle θ of the power transmission coil 34 to the third rotation angle θ3, the central axis 34b of the power transmission coil 34 can be arranged on the extension line of the central axis 51a of the relay coil 51. .. The third rotation angle region R3 shown in FIG. 6 is a region of the rotation angle θ of the power transmission coil 34 including the third rotation angle θ3. When power is supplied to the power transmission coil 34 in a situation where the rotation angle θ is the rotation angle within the third rotation angle region R3, the magnitude of the induced voltage generated in the power receiving coil 41 of the third power receiving device 40C is the third. It can be larger than both the magnitude of the induced voltage generated by the power receiving coil 41 of the power receiving device 40A and the magnitude of the induced voltage generated by the power receiving coil 41 of the second power receiving device 40B. Both the upper limit rotation angle and the lower limit rotation angle of the third rotation angle region R3 are preset by experiments, simulations, and the like.

そのため、図５に示した一連の処理において、ステップＳ１１で対象受電装置として第３受電装置４０Ｃが決定された場合、次のステップＳ１２では、準備処理によって、送電コイル３４の回転角θが第３回転角領域Ｒ３の角度とされる。この際、回転角θは、第３回転角領域Ｒ３内の角度であれば第３回転角θ３と等しくなくてもよい。しかし、最良の形態は、回転角θを第３回転角θ３と等しくすることである。 Therefore, in the series of processes shown in FIG. 5, when the third power receiving device 40C is determined as the target power receiving device in step S11, in the next step S12, the rotation angle θ of the power transmission coil 34 is set to the third by the preparatory process. It is the angle of the rotation angle region R3. At this time, the rotation angle θ does not have to be equal to the third rotation angle θ3 as long as it is an angle within the third rotation angle region R3. However, the best form is to make the rotation angle θ equal to the third rotation angle θ3.

準備処理が終了すると、次のステップＳ１３において、無線充電処理によって、送電コイル３４に給電が行われる。すると、送電コイル３４への給電に伴う磁束が中継コイル５１の内側を通るため、中継コイル５１で誘起電圧が発生する。これにより、中継コイル５１に電流が流れるため、中継コイル５１に電流が流れることに起因する磁界が発生する。すると、こうした磁界の発生によって第３受電装置４０Ｃの受電コイル４１の内側を磁束が通るようになり、第３受電装置４０Ｃの受電コイル４１で誘起電圧が発生する。その結果、第３受電装置４０Ｃでは、受電コイル４１で発生した誘起電圧に基づいて充電部４３が充電される。すなわち、送電コイル３４の回転角θを調整することにより、送電装置３１と第３受電装置４０Ｃとの間でも中継コイル５１を経由した無線給電を行うことができる。 When the preparatory process is completed, power is supplied to the power transmission coil 34 by the wireless charging process in the next step S13. Then, since the magnetic flux accompanying the power supply to the power transmission coil 34 passes through the inside of the relay coil 51, an induced voltage is generated in the relay coil 51. As a result, a current flows through the relay coil 51, so that a magnetic field is generated due to the current flowing through the relay coil 51. Then, the magnetic flux passes through the inside of the power receiving coil 41 of the third power receiving device 40C due to the generation of such a magnetic field, and the induced voltage is generated in the power receiving coil 41 of the third power receiving device 40C. As a result, in the third power receiving device 40C, the charging unit 43 is charged based on the induced voltage generated by the power receiving coil 41. That is, by adjusting the rotation angle θ of the power transmission coil 34, wireless power supply can be performed between the power transmission device 31 and the third power receiving device 40C via the relay coil 51.

（変更例）
上記各実施形態は、以下のように変更して実施することができる。上記各実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。 (Change example)
Each of the above embodiments can be modified and implemented as follows. Each of the above embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.

・上記第２実施形態において、中継コイル５１を、以下に示す２つの条件（Ａ），（Ｂ）のうち何れか一方の条件を満たすように配置してもよい。
（Ａ）回転角θが第３回転角領域Ｒ３内の回転角である状況下で送電コイル３４に給電が行われた場合、第３受電装置４０Ｃの受電コイル４１で発生する誘起電圧の大きさを、第１受電装置４０Ａの受電コイル４１で発生する誘起電圧の大きさよりも大きく、第２受電装置４０Ｂの受電コイル４１で発生する誘起電圧の大きさ以下とすること。
（Ｂ）回転角θが第３回転角領域Ｒ３内の回転角である状況下で送電コイル３４に給電が行われた場合、第３受電装置４０Ｃの受電コイル４１で発生する誘起電圧の大きさを、第２受電装置４０Ｂの受電コイル４１で発生する誘起電圧の大きさよりも大きく、第１受電装置４０Ａの受電コイル４１で発生する誘起電圧の大きさ以下とすること。 -In the second embodiment, the relay coil 51 may be arranged so as to satisfy either one of the following two conditions (A) and (B).
(A) When power is supplied to the power transmission coil 34 under the condition that the rotation angle θ is the rotation angle in the third rotation angle region R3, the magnitude of the induced voltage generated in the power receiving coil 41 of the third power receiving device 40C. Is greater than the magnitude of the induced voltage generated by the power receiving coil 41 of the first power receiving device 40A and equal to or less than the magnitude of the induced voltage generated by the power receiving coil 41 of the second power receiving device 40B.
(B) When power is supplied to the power transmission coil 34 under the condition that the rotation angle θ is the rotation angle in the third rotation angle region R3, the magnitude of the induced voltage generated in the power receiving coil 41 of the third power receiving device 40C. Is greater than the magnitude of the induced voltage generated by the power receiving coil 41 of the second power receiving device 40B and equal to or less than the magnitude of the induced voltage generated by the power receiving coil 41 of the first power receiving device 40A.

なお、条件（Ａ）を満たすように中継コイル５１を配置する場合、第３回転角領域Ｒ３の少なくとも一部が第２回転角領域Ｒ２と重複してもよい。一方、条件（Ｂ）を満たすように中継コイル５１を配置する場合、第３回転角領域Ｒ３の少なくとも一部が第１回転角領域Ｒ１と重複してもよい。 When the relay coil 51 is arranged so as to satisfy the condition (A), at least a part of the third rotation angle region R3 may overlap with the second rotation angle region R2. On the other hand, when the relay coil 51 is arranged so as to satisfy the condition (B), at least a part of the third rotation angle region R3 may overlap with the first rotation angle region R1.

・上記第２実施形態では、送電装置３１と第３受電装置４０Ｃとの間では、１つの中継コイル５１を経由して無線給電が行われる。しかし、送電装置３１と第３受電装置４０Ｃとの間では、２つ以上の中継コイル５１を経由して無線給電が行われるようにしてもよい。 -In the second embodiment, wireless power supply is performed between the power transmission device 31 and the third power receiving device 40C via one relay coil 51. However, wireless power supply may be performed between the power transmission device 31 and the third power receiving device 40C via two or more relay coils 51.

・上記第２実施形態では、第３受電装置４０Ｃの充電部４３を充電させるために中継装置５０を、受電装置４０Ａ，４０Ｂとは別途設けている。しかし、第１受電装置４０Ａ及び第２受電装置４０Ｂのうちの何れか一方を中継装置として機能させるようにしてもよい。例えば第１受電装置４０Ａを中継装置として機能させる場合、第１受電装置４０Ａの受電コイル４１が中継コイルとして機能することとなる。この場合、第１受電装置４０Ａの受電コイル４１で磁束を発生させることにより、第３受電装置４０Ｃの受電コイル４１で誘起電圧が発生するように、第１受電装置４０Ａと第３受電装置４０Ｃとを配置する必要がある。 -In the second embodiment, the relay device 50 is provided separately from the power receiving devices 40A and 40B in order to charge the charging unit 43 of the third power receiving device 40C. However, either one of the first power receiving device 40A and the second power receiving device 40B may be made to function as a relay device. For example, when the first power receiving device 40A functions as a relay device, the power receiving coil 41 of the first power receiving device 40A functions as a relay coil. In this case, the first power receiving device 40A and the third power receiving device 40C so that the induced voltage is generated by the power receiving coil 41 of the third power receiving device 40C by generating the magnetic flux in the power receiving coil 41 of the first power receiving device 40A. Need to be placed.

・上記各実施形態では、送電コイル３４の中心軸線３４ｂが回転する仮想平面を第１仮想平面とした場合、各受電装置の受電コイル４１の中心軸線４１ａを第１仮想平面上に沿うようにしている。しかし、各受電装置のうちの少なくとも１つの受電装置の受電コイル４１の中心軸線４１ａを、送電コイル３４の回転軸線３４ａと直交させることができるのであれば、第１仮想平面に沿っていなくてもよい。すなわち、各受電装置のうちの少なくとも１つの受電装置の受電コイル４１の中心軸線４１ａの車両上下方向の位置が、送電コイル３４の中心軸線３４ｂの車両上下方向の位置とは多少ずれていてもよい。 -In each of the above embodiments, when the virtual plane on which the central axis 34b of the power transmission coil 34 rotates is set as the first virtual plane, the central axis 41a of the power receiving coil 41 of each power receiving device is set along the first virtual plane. There is. However, if the central axis 41a of the power receiving coil 41 of at least one of the power receiving devices can be orthogonal to the rotation axis 34a of the power transmission coil 34, it does not have to be along the first virtual plane. Good. That is, the position of the central axis 41a of the power receiving coil 41 of at least one of the power receiving devices in the vehicle vertical direction may be slightly deviated from the position of the central axis 34b of the power transmission coil 34 in the vehicle vertical direction. ..

・受電装置４０Ａ，４０Ｂの充電部４３の電力を、モータ制御部２４に供給するのであれば、電気モータ２３に供給しなくてもよい。この場合、充電部４３とは別の電源からの給電によって電気モータ２３を駆動させることになる。 -If the electric power of the charging unit 43 of the power receiving devices 40A and 40B is supplied to the motor control unit 24, it is not necessary to supply the electric power to the electric motor 23. In this case, the electric motor 23 is driven by power supplied from a power source different from that of the charging unit 43.

・受電装置は、電力を必要とする装置であれば、制動機構２０Ｂ以外の他の車載装置に設けてもよい。例えば、他の車載装置としては、例えば、パワーウィンドウ装置を挙げることができる。また、受電装置を、車載の電子制御装置に設けてもよい。この場合、受電装置の充電部４３を、電子制御装置の電源とすることが可能となる。 -The power receiving device may be provided in an in-vehicle device other than the braking mechanism 20B as long as it is a device that requires electric power. For example, as another in-vehicle device, for example, a power window device can be mentioned. Further, the power receiving device may be provided in an in-vehicle electronic control device. In this case, the charging unit 43 of the power receiving device can be used as a power source for the electronic control device.

・車両の動力源となる駆動モータがホイールに設けられるインホイールモータ方式が駆動方式として採用される車両に、無線給電装置３０を適用してもよい。この場合、受電装置の充電部４３を、駆動モータを制御するモータ制御装置の電源として利用したり、駆動モータの電源として利用したりすることができる。 -The wireless power feeding device 30 may be applied to a vehicle in which an in-wheel motor system in which a drive motor as a power source of the vehicle is provided on the wheel is adopted as the drive system. In this case, the charging unit 43 of the power receiving device can be used as a power source for the motor control device that controls the drive motor, or can be used as a power source for the drive motor.

・車両以外の他の装置に、無線給電装置３０を設けてもよい。
・上記各実施形態では、１つの軸を中心に送電コイル３４を回転させるようにしている。しかし、２軸で送電コイル３４を回転させるようにしてもよいし、３軸で送電コイル３４を回転させるようにしてもよい。これにより、受電装置の配置の自由度を高くできる。 -The wireless power supply device 30 may be provided in a device other than the vehicle.
-In each of the above embodiments, the power transmission coil 34 is rotated around one axis. However, the power transmission coil 34 may be rotated on two axes, or the power transmission coil 34 may be rotated on three axes. As a result, the degree of freedom in arranging the power receiving device can be increased.

・無線給電装置は、２つ以上の受電装置を備えるのであれば、３つ以上の任意数の受電装置を備えるものであってもよい。
・無線給電装置３０を構成する複数の受電装置のうち、少なくとも一つの受電装置は、充電部４３を有していなくてもよい。充電部４３を有さない受電装置を、規定充電装置という。規定充電装置を備える車載装置において、無線給電装置３０による給電によって動作するものを給電対象部という。そして、規定充電装置を備える車載装置では、規定受電装置の受電コイル４１で誘起電圧が発生しているときに限って給電対象部を動作させることができる。そのため、規定充電装置を備える車載装置の給電対象部を動作させるときに、規定充電装置の受電コイル４１で誘起電圧を発生させることができるように、送電コイル３４の回転角θを調整することが好ましい。 -The wireless power feeding device may be provided with any number of three or more power receiving devices as long as it is provided with two or more power receiving devices.
-Of the plurality of power receiving devices constituting the wireless power feeding device 30, at least one power receiving device does not have to have the charging unit 43. A power receiving device that does not have a charging unit 43 is called a specified charging device. An in-vehicle device provided with a specified charging device, which operates by power feeding by the wireless power feeding device 30, is referred to as a power feeding target unit. Then, in the in-vehicle device provided with the specified charging device, the power supply target unit can be operated only when the induced voltage is generated in the power receiving coil 41 of the specified power receiving device. Therefore, it is possible to adjust the rotation angle θ of the power transmission coil 34 so that the power receiving coil 41 of the specified charging device can generate an induced voltage when operating the power supply target portion of the in-vehicle device provided with the specified charging device. preferable.

・車両１０には、複数の無線給電装置３０を搭載してもよい。
・上記各実施形態では、電磁誘導方式での無線給電の例を説明している。しかし、無線給電の方式として、電磁誘導方式以外の他の方式を採用してもよい。他の方式としては、例えば磁気共鳴方式を挙げることができる。この場合、送電装置３１と第１受電装置４０Ａとの間で無線給電を行う場合の第１回転角領域Ｒ１として、磁気共鳴方式に対応した回転角θの領域が設定されることになる。同様に、送電装置３１と第２受電装置４０Ｂとの間で無線給電を行う場合の第２回転角領域Ｒ２として、磁気共鳴方式に対応した回転角θの領域が設定されることになる。 -The vehicle 10 may be equipped with a plurality of wireless power feeding devices 30.
-In each of the above embodiments, an example of wireless power feeding by the electromagnetic induction method is described. However, as the wireless power supply method, a method other than the electromagnetic induction method may be adopted. As another method, for example, a magnetic resonance method can be mentioned. In this case, a region having a rotation angle θ corresponding to the magnetic resonance method is set as the first rotation angle region R1 when wireless power is supplied between the power transmission device 31 and the first power receiving device 40A. Similarly, a region having a rotation angle θ corresponding to the magnetic resonance method is set as the second rotation angle region R2 when wireless power is supplied between the power transmission device 31 and the second power reception device 40B.

・給電制御部３７は、コンピュータプログラムに従って動作する１つ以上のプロセッサ、各種処理のうち少なくとも一部の処理を実行する専用のハードウェアなどの１つ以上の専用のハードウェア回路又はこれらの組み合わせを含む回路として構成し得る。専用のハードウェアとしては、例えば、特定用途向け集積回路であるＡＳＩＣを挙げることができる。プロセッサは、ＣＰＵ並びに、ＲＡＭ及びＲＯＭなどのメモリを含み、メモリは、処理をＣＰＵに実行させるように構成されたプログラムコード又は指令を格納している。メモリ、すなわち記憶媒体は、汎用又は専用のコンピュータでアクセスできるあらゆる利用可能な媒体を含む。 The power supply control unit 37 uses one or more dedicated hardware circuits such as one or more processors that operate according to a computer program and dedicated hardware that executes at least a part of various processes, or a combination thereof. It can be configured as a including circuit. As the dedicated hardware, for example, an ASIC which is an integrated circuit for a specific application can be mentioned. The processor includes a CPU and a memory such as a RAM and a ROM, and the memory stores a program code or an instruction configured to cause the CPU to execute a process. Memory, or storage medium, includes any available medium accessible by a general purpose or dedicated computer.

１０…車両、１１…車体、１２〜１５…車輪、２０Ａ，２０Ｂ…制動機構、２３…電気モータ、３０…無線給電装置、３１…送電装置、３２…支持台、３４…送電コイル、３４ａ…回転軸線、３４ｂ…中心軸線、３５…給電部、３６…アクチュエータ、３７…給電制御部、４０Ａ…第１受電装置、４０Ｂ…第２受電装置、４０Ｃ…第３受電装置、４１…受電コイル、４３…充電部、５０…中継装置、５１…中継コイル。 10 ... Vehicle, 11 ... Body, 12 to 15 ... Wheels, 20A, 20B ... Braking mechanism, 23 ... Electric motor, 30 ... Wireless power supply device, 31 ... Power transmission device, 32 ... Support stand, 34 ... Power transmission coil, 34a ... Rotation Axial line, 34b ... Central axis, 35 ... Power supply unit, 36 ... Actuator, 37 ... Power supply control unit, 40A ... 1st power receiving device, 40B ... 2nd power receiving device, 40C ... 3rd power receiving device, 41 ... Power receiving coil, 43 ... Charging unit, 50 ... relay device, 51 ... relay coil.

Claims (6)

送電装置と複数の受電装置とを備え、
前記送電装置は、給電されると磁界を発生する送電コイルと、前記送電コイルを回転可能な状態で支持する支持台と、前記送電コイルを回転させる際の動力源であるアクチュエータと、前記送電コイルに給電する給電部と、前記アクチュエータの制御により前記送電コイルの回転角を調整する給電制御部と、を有し、
複数の前記受電装置は、前記給電部から前記送電コイルへの給電に伴う磁界の発生によって誘起電圧を発生する受電コイルをそれぞれ有し、
複数の前記受電装置のうちの第１受電装置の前記受電コイルで発生する誘起電圧の大きさが複数の前記受電装置のうちの前記第１受電装置以外の他の受電装置の前記受電コイルで発生する誘起電圧の大きさよりも大きくなる前記送電コイルの回転角の領域を第１回転角領域とし、複数の前記受電装置のうちの第２受電装置の前記受電コイルで発生する誘起電圧の大きさが複数の前記受電装置のうちの前記第２受電装置以外の他の受電装置の前記受電コイルで発生する誘起電圧の大きさよりも大きくなる前記送電コイルの回転角の領域を第２回転角領域とした場合、
前記給電制御部は、前記第１受電装置の前記受電コイルで誘起電圧を発生させるときには前記送電コイルの回転角を前記第１回転角領域内の角度とし、前記第２受電装置の前記受電コイルで誘起電圧を発生させるときには前記送電コイルの回転角を前記第２回転角領域内の角度とする
無線給電装置。 Equipped with a power transmission device and multiple power receiving devices,
The power transmission device includes a power transmission coil that generates a magnetic field when power is supplied, a support base that supports the power transmission coil in a rotatable state, an actuator that is a power source for rotating the power transmission coil, and the power transmission coil. It has a power feeding unit that feeds power to the power transmission coil and a power feeding control unit that adjusts the rotation angle of the power transmission coil by controlling the actuator.
Each of the plurality of power receiving devices has a power receiving coil that generates an induced voltage by generating a magnetic field accompanying the power feeding from the power feeding unit to the power transmission coil.
The magnitude of the induced voltage generated by the power receiving coil of the first power receiving device among the plurality of power receiving devices is generated by the power receiving coil of a power receiving device other than the first power receiving device among the plurality of power receiving devices. The region of the rotation angle of the power transmission coil that is larger than the magnitude of the induced voltage is defined as the first rotation angle region, and the magnitude of the induced voltage generated in the power receiving coil of the second power receiving device among the plurality of power receiving devices is The region of the rotation angle of the power transmission coil, which is larger than the magnitude of the induced voltage generated in the power receiving coil of the power receiving device other than the second power receiving device among the plurality of power receiving devices, is defined as the second rotation angle region. If,
When the power supply control unit generates an induced voltage with the power receiving coil of the first power receiving device, the rotation angle of the power transmitting coil is set to an angle within the first rotation angle region, and the power receiving coil of the second power receiving device sets the rotation angle. A wireless power feeding device in which the rotation angle of the transmission coil is an angle within the second rotation angle region when an induced voltage is generated. 前記送電コイルの回転軸線は、当該送電コイルの中心軸線と直交する
請求項１に記載の無線給電装置。 The wireless power feeding device according to claim 1, wherein the rotating axis of the power transmission coil is orthogonal to the central axis of the power transmission coil. 前記送電装置及び複数の前記受電装置は、車両にそれぞれ設けられている
請求項１又は請求項２に記載の無線給電装置。 The wireless power feeding device according to claim 1 or 2, wherein the power transmitting device and the plurality of power receiving devices are provided in the vehicle, respectively. 前記車両は、車輪に対する摩擦制動力を調整する制動機構として、電気モータの駆動量に応じた摩擦制動力を前記車輪に付与する電動式制動機構を備えるものであり、
前記第１受電装置は、前記車輪のうちの第１車輪用の前記電動式制動機構に設けられ、前記第２受電装置は、前記車輪のうちの第２車輪用の前記電動式制動機構に設けられ、前記送電装置の前記支持台は、前記車両の車体に固定されている
請求項３に記載の無線給電装置。 The vehicle is provided with an electric braking mechanism that applies a friction braking force corresponding to a driving amount of an electric motor to the wheels as a braking mechanism for adjusting the friction braking force with respect to the wheels.
The first power receiving device is provided in the electric braking mechanism for the first wheel of the wheels, and the second power receiving device is provided in the electric braking mechanism for the second wheel of the wheels. The wireless power supply device according to claim 3, wherein the support base of the power transmission device is fixed to the vehicle body of the vehicle. 前記給電部から前記送電コイルへの給電に伴う磁界の発生によって誘起電圧を発生する中継コイルを有する中継装置を備え、
前記中継装置は、前記中継コイルに電流が流れるときには、当該中継コイルに電流が流れることに起因して磁界を発生させるとともに、当該磁界の発生によって複数の前記受電装置のうちの第３受電装置の前記受電コイルに誘起電圧を発生させるものであり、
前記給電部から前記送電コイルに給電された際に、前記第３受電装置の前記受電コイルで発生する誘起電圧の大きさが、前記第１受電装置の前記受電コイルで発生する誘起電圧の大きさ及び前記第２受電装置の前記受電コイルで発生する誘起電圧の大きさの少なくとも一方よりも大きくなる前記送電コイルの回転角の領域を第３回転角領域とした場合、
前記給電制御部は、前記第３受電装置の前記受電コイルで誘起電圧を発生させるときには前記送電コイルの回転角を前記第３回転角領域内の角度とする
請求項１〜請求項４のうち何れか一項に記載の無線給電装置。 A relay device having a relay coil that generates an induced voltage by generating a magnetic field accompanying the power supply from the power feeding unit to the power transmission coil is provided.
When a current flows through the relay coil, the relay device generates a magnetic field due to the current flowing through the relay coil, and the generation of the magnetic field causes the third power receiving device among the plurality of power receiving devices. It generates an induced voltage in the power receiving coil.
The magnitude of the induced voltage generated by the power receiving coil of the third power receiving device when the power is supplied from the feeding unit to the power transmitting coil is the magnitude of the induced voltage generated by the power receiving coil of the first power receiving device. And when the region of the rotation angle of the power transmission coil, which is larger than at least one of the magnitudes of the induced voltage generated by the power receiving coil of the second power receiving device, is defined as the third rotation angle region.
Any of claims 1 to 4, wherein the power supply control unit sets the rotation angle of the power transmission coil as an angle within the third rotation angle region when the power receiving coil of the third power receiving device generates an induced voltage. The wireless power supply device according to item 1. 複数の前記受電装置の少なくとも一つの前記受電装置は、前記受電コイルで発生した誘起電圧に基づいて充電される充電部を有する
請求項１〜請求項５のうち何れか一項に記載の無線給電装置。 The wireless power supply according to any one of claims 1 to 5, wherein at least one of the plurality of power receiving devices has a charging unit that is charged based on an induced voltage generated by the power receiving coil. apparatus.
JP2019189994A 2019-10-17 2019-10-17 Wireless power feeding device Pending JP2021065065A (en)

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