JP6893683B2 - Mobile power supply system - Google Patents

Mobile power supply system Download PDF

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JP6893683B2
JP6893683B2 JP2017041190A JP2017041190A JP6893683B2 JP 6893683 B2 JP6893683 B2 JP 6893683B2 JP 2017041190 A JP2017041190 A JP 2017041190A JP 2017041190 A JP2017041190 A JP 2017041190A JP 6893683 B2 JP6893683 B2 JP 6893683B2
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power transmission
power receiving
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JP2018148681A (en
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粟井　郁雄
郁雄 粟井
健太朗 川辺
健太朗 川辺
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富士ウェーブ株式会社
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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
    • Y02T90/14—Plug-in electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Description

本発明は、移動体に非接触で給電する移動体給電システムに関する。 The present invention relates to a mobile power supply system that supplies power to a mobile body in a non-contact manner.

従来より、電気自動車などの移動体に地面側から非接触で（無線で）給電する（電力を供給する）移動体給電システムが各種提案されている。電磁界は、放射電磁界（電磁波）と非放射電磁界（エバネッセント場）に分類でき、非放射電磁界を用いた非接触での給電には、電磁誘導結合方式、容量結合方式、共振器結合方式などがある。 Conventionally, various mobile power supply systems have been proposed in which power is supplied (power is supplied) to a moving body such as an electric vehicle from the ground side in a non-contact manner (wirelessly). Electromagnetic fields can be classified into radiated electromagnetic fields (electromagnetic waves) and non-radiated electromagnetic fields (evanescent fields). For non-contact power supply using non-radiated electromagnetic fields, electromagnetic induction coupling method, capacitive coupling method, and resonator coupling are used. There are methods and so on.

例えば、特許文献１〜５には、電磁誘導により給電する電磁誘導結合方式の移動体給電システムが記載されている。特許文献１では、移動体にコイルが設けられ、地面側には直流送電線が設けられたものが開示されている。特許文献２では、移動体の車輪の中にコイルが設けられ、地面側には車輪の幅とほぼ同じ幅の１次側インダクタが移動体の移動路に沿って地上に敷設されたものが開示されている。特許文献３では、移動体にコイルが設けられ、地面側には多数のコイルが移動体の移動方向に沿って列設されたものが開示されている。特許文献４では、移動体にループ状のコイルが設けられ、地面側には、移動体の移動方向に沿って長いループ状をなすとともに途中で交叉したコイルが設けられたものが開示されている。特許文献５では、移動体にコイルが設けられ、地面側には、線状に形成された導体が設けられたものが開示されている。また、例えば、特許文献６には、容量により受電側と送電側が結合することで給電する容量結合方式の移動体給電システムが記載されている。特許文献６には、移動体の第１車輪と第２車輪の下方にそれぞれ、地面側の第１導体と第２導体を設置し第１導体と第２導体の間に交流電力を印加しているものが開示されている。 For example, Patent Documents 1 to 5 describe an electromagnetic induction coupling type mobile power feeding system that supplies power by electromagnetic induction. Patent Document 1 discloses a moving body provided with a coil and a DC transmission line provided on the ground side. Patent Document 2 discloses that a coil is provided in a wheel of a moving body, and a primary inductor having a width substantially equal to the width of the wheel is laid on the ground along the moving path of the moving body on the ground side. Has been done. Patent Document 3 discloses that a moving body is provided with coils, and a large number of coils are arranged in a row along the moving direction of the moving body on the ground side. Patent Document 4 discloses that a moving body is provided with a loop-shaped coil, and a coil having a long loop shape along the moving direction of the moving body and crossed in the middle is provided on the ground side. .. Patent Document 5 discloses a moving body provided with a coil and a linearly formed conductor provided on the ground side. Further, for example, Patent Document 6 describes a capacity-coupling mobile power feeding system in which power is supplied by coupling the power receiving side and the power transmitting side according to the capacity. In Patent Document 6, the first conductor and the second conductor on the ground side are installed below the first wheel and the second wheel of the moving body, respectively, and AC power is applied between the first conductor and the second conductor. What is disclosed.

また、例えば、特許文献７〜９には、移動体側（受電側）と地面側（送電側）に共振コイルを設け、それらを共振させることで給電する共振器結合方式の移動体給電システムが記載されている。特許文献７では、移動体側の共振コイルは、車体下部又は車輪に設けられており、地面側の共振コイルは中心軸を鉛直方向にして巻かれているものが開示されている。特許文献８では、移動体側の共振コイルを車輪の中に設け、地面側のインダクタンス成分を有する直線延伸部分が車輪の位置の下になり得るようにしたものが開示されている。特許文献９では、地面側の共振コイルは移動体側の共振コイルよりもサイズを大きくしているものが開示されている。 Further, for example, Patent Documents 7 to 9 describe a resonator coupling type mobile power feeding system in which resonance coils are provided on the moving body side (power receiving side) and the ground side (power transmission side) and power is supplied by resonating them. Has been done. Patent Document 7 discloses that the resonance coil on the moving body side is provided on the lower portion of the vehicle body or the wheel, and the resonance coil on the ground side is wound with the central axis in the vertical direction. Patent Document 8 discloses that a resonance coil on the moving body side is provided in the wheel so that a linearly stretched portion having an inductance component on the ground side can be below the position of the wheel. Patent Document 9 discloses that the resonance coil on the ground side has a larger size than the resonance coil on the moving body side.

特開平０７−１７０６１２号公報Japanese Unexamined Patent Publication No. 07-170612 特開平０８−１２６１０６号公報Japanese Unexamined Patent Publication No. 08-126106 特開２００９−７１９０９号公報Japanese Unexamined Patent Publication No. 2009-71909 特開２０１１−２２３７０３号公報Japanese Unexamined Patent Publication No. 2011-223703 特開２０１３−４２６１６号公報Japanese Unexamined Patent Publication No. 2013-42616 特開２０１２−１７５８６９号公報Japanese Unexamined Patent Publication No. 2012-175869 特開２００９−１０６１３６号公報JP-A-2009-106136 特開２０１４−１９５３５０号公報Japanese Unexamined Patent Publication No. 2014-195350 特開２０１１−１０９９０３号公報Japanese Unexamined Patent Publication No. 2011-109903

しかし、特許文献１〜８に開示されている移動体給電システムは、移動体が横方向（移動方向に直交する方向））にずれると電力の伝送効率が大きく変わるため、移動体を正確に横方向に位置制御しなければならない。また、特許文献９に開示の移動体給電システムは、移動体の横方向のずれを考慮しているが、電流を流すことにより発生する磁気の分布が広いため、結合係数が小さいので、得られる電力の伝送効率には限界がある。 However, in the mobile power feeding system disclosed in Patent Documents 1 to 8, when the mobile body shifts in the lateral direction (direction orthogonal to the moving direction), the power transmission efficiency changes significantly, so that the moving body can be accurately lateralized. The position must be controlled in the direction. Further, the mobile power feeding system disclosed in Patent Document 9 takes into consideration the lateral displacement of the moving body, but can be obtained because the magnetic distribution generated by passing an electric current is wide and the coupling coefficient is small. There is a limit to the power transmission efficiency.

本願発明者は、共振器結合方式の移動体給電システムを鋭意研究し、簡単な構成で、電力の伝送効率が小さくはならず、移動体が横方向にずれても電力の伝送効率が大きく変わることのないものを案出した。 The inventor of the present application has diligently researched a resonator-coupled mobile power feeding system, and with a simple configuration, the power transmission efficiency does not decrease, and even if the mobile body shifts in the lateral direction, the power transmission efficiency changes significantly. I came up with something that never happened.

本発明は、係る事由に鑑みてなされたものであり、その目的は、簡単な構成で、電力の伝送効率が小さくはならず、移動体が横方向にずれても電力の伝送効率が大きく変わることのない移動体給電システムを提供することにある。 The present invention has been made in view of the above reasons, and an object of the present invention is to have a simple configuration, the power transmission efficiency is not reduced, and the power transmission efficiency is significantly changed even if the moving body is laterally displaced. The purpose is to provide a mobile power supply system that never happens.

上記目的を達成するために、請求項１に記載の移動体給電システムは、地面側の送電装置から移動体の受電装置に非接触で給電し得る移動体給電システムであって、前記送電装置は、地面表面に沿って延伸する１個のみの送電板と、該送電板に送電接続線を介して一端が接続され他端が開放され２分の１波長共振モードで共振するスパイラルコイルの送電共振器コイルと、を備え、前記受電装置は、前記送電板に対向する１個のみの受電板と、該受電板に受電接続線を介して一端が接続され他端が開放され２分の１波長共振モードで共振するスパイラルコイルの受電共振器コイルと、を備えていることを特徴とする。 In order to achieve the above object, the mobile power supply system according to claim 1 is a mobile power supply system capable of supplying power from a power transmission device on the ground side to a power receiving device of a mobile body in a non-contact manner. , Transmission resonance of only one transmission plate extending along the ground surface and a spiral coil that is connected to the transmission plate at one end via a transmission connection line and the other end is opened to resonate in a half wavelength resonance mode. The power receiving device includes a device coil, and the power receiving device has only one power receiving plate facing the power transmission plate, and one end is connected to the power receiving plate via a power receiving connection line and the other end is opened to have a half wavelength. It is characterized by including a power receiving resonator coil of a spiral coil that resonates in a resonance mode.

本発明の移動体給電システムによれば、簡単な構成で、電力の伝送効率が小さくはならず、移動体が横方向にずれても電力の伝送効率が大きく変わることがない。 According to the mobile power feeding system of the present invention, the power transmission efficiency does not decrease with a simple configuration, and the power transmission efficiency does not change significantly even if the mobile body shifts in the lateral direction.

本発明の実施形態に係る移動体給電システムの概略を示すものであって、（ａ）が平面図、（ｂ）が側面図、（ｃ）が斜視図である。The outline of the mobile power feeding system which concerns on embodiment of this invention is shown, (a) is a plan view, (b) is a side view, and (c) is a perspective view. 同上の移動体給電システムの実験条件を示すものであって、（ａ）が移動体給電システムの側面図、（ｂ）が実験で用いた受電板を拡大して示す平面図である。The experimental conditions of the mobile power supply system as described above are shown, in which (a) is a side view of the mobile power supply system, and (b) is an enlarged plan view of the power receiving plate used in the experiment. 同上の移動体給電システムの実験結果を示すグラフである。It is a graph which shows the experimental result of the mobile power supply system as above. 同上の移動体給電システムの変形例を示す平面図である。It is a top view which shows the modification of the mobile power feeding system of the same above.

以下、本発明を実施するための形態を説明する。本発明の実施形態に係る移動体給電システム１は、図１（ａ）〜（ｃ）に示すように、地面側の送電装置２から移動体３の受電装置４に非接触で給電し得るものである。なお、地面とは、路面や床面など、移動体がそれに対して移動するもののことである。また、移動体とは、自動車等の車両や移動型ロボットなどが含まれる。 Hereinafter, modes for carrying out the present invention will be described. As shown in FIGS. 1 (a) to 1 (c), the mobile power feeding system 1 according to the embodiment of the present invention can supply power from the power transmitting device 2 on the ground side to the power receiving device 4 of the mobile body 3 in a non-contact manner. Is. The ground is a moving object such as a road surface or a floor surface that moves with respect to the ground surface. Further, the moving body includes a vehicle such as an automobile, a mobile robot, and the like.

送電装置２は、送電板２１と送電接続線２２と送電共振器コイル２３を備えている。 The power transmission device 2 includes a power transmission plate 21, a power transmission connection line 22, and a power transmission resonator coil 23.

送電板２１は、地面表面に沿って延伸する。延伸する方向は、移動体３が移動する方向（以下、移動方向）である。送電板２１は、横方向（移動方向に直交する方向）よりも移動方向が長くなっている。 The power transmission plate 21 extends along the ground surface. The stretching direction is the direction in which the moving body 3 moves (hereinafter, the moving direction). The power transmission plate 21 has a longer moving direction than the lateral direction (direction orthogonal to the moving direction).

送電接続線２２は、送電板２１と送電共振器コイル２３の一端を接続する。送電接続線２２と送電板２１の接続点は、送電坂２１の端部又はその近傍で有れば特に制限はないが、送電坂２１の上面（図１（ｂ）参照）又は側面などが可能である。送電接続線２２は、曲げることも可能である。 The power transmission connection line 22 connects one end of the power transmission plate 21 and the power transmission resonator coil 23. The connection point between the power transmission connection line 22 and the power transmission plate 21 is not particularly limited as long as it is at or near the end of the power transmission slope 21, but the upper surface (see FIG. 1B) or the side surface of the power transmission slope 21 can be used. Is. The power transmission connection line 22 can also be bent.

送電共振器コイル２３は、特に位置が限定されるものではないが、例えば、送電板２１の上方（図１（ｂ）参照）に又は送電板２１に水平に並べて設置することが可能である。また、送電共振器コイル２３は、スパイラルコイルを用いることができる。送電共振器コイル２３は、上述したように、その一端が送電接続線２２を介して送電坂２１に接続されているが、他端は、開放（オープン）状態（図１（ａ）、（ｃ）参照）とすることができる。送電共振器コイル２３は、２分の１波長共振モードで共振することになる。 The position of the power transmission resonator coil 23 is not particularly limited, but it can be installed, for example, above the power transmission plate 21 (see FIG. 1B) or horizontally side by side on the power transmission plate 21. Further, as the power transmission resonator coil 23, a spiral coil can be used. As described above, one end of the power transmission resonator coil 23 is connected to the power transmission slope 21 via the power transmission connection line 22, but the other end is in an open state (FIGS. 1A and 1C). ) Can be used. The power transmission resonator coil 23 resonates in the half wavelength resonance mode.

詳細には、送電装置２は、更に、送電制御器２４を備えている。送電制御器２４は、電力用高周波電源２４ａと結合ループ２４ｂとを有している。電力用高周波電源２４ａは、結合ループ２４ｂを介して送電側共振器コイル２３を励振する。結合ループ２４ｂは、送電側共振器コイル２３に電磁誘導結合しており、インピーダンスの整合を行う。結合ループ２４ｂは、他の公知のインピーダンス整合手段で置き換えることも可能である。 Specifically, the power transmission device 2 further includes a power transmission controller 24. The power transmission controller 24 has a high frequency power supply 24a for electric power and a coupling loop 24b. The high frequency power supply 24a for electric power excites the power transmission side resonator coil 23 via the coupling loop 24b. The coupling loop 24b is electromagnetically induced coupled to the power transmission side resonator coil 23 to perform impedance matching. The coupling loop 24b can also be replaced by other known impedance matching means.

受電装置４は、移動体３に搭載されている。受電装置４は、受電板４１と受電接続線４２と受電共振器コイル４３を備えている。 The power receiving device 4 is mounted on the moving body 3. The power receiving device 4 includes a power receiving plate 41, a power receiving connection line 42, and a power receiving resonator coil 43.

受電板４１は、移動体３が移動するとき、送電板４１に対向しながら移動する。受電板４１の面積は、送電板４１よりも小さい。送電板４１は、平板状であれば、様々な形状が可能である（図２（ｂ）参照）。 When the moving body 3 moves, the power receiving plate 41 moves while facing the power transmitting plate 41. The area of the power receiving plate 41 is smaller than that of the power transmitting plate 41. The power transmission plate 41 can have various shapes as long as it has a flat plate shape (see FIG. 2B).

受電接続線４２は、受電板４１と受電共振器コイル４３の一端を接続する。受電接続線４２と受電板４１の接続点は、受電坂４１の上面（図１（ｂ）参照）又は側面などが可能である。受電接続線４２は、曲げることも可能である。 The power receiving connection line 42 connects one end of the power receiving plate 41 and the power receiving resonator coil 43. The connection point between the power receiving connection line 42 and the power receiving plate 41 can be the upper surface (see FIG. 1B) or the side surface of the power receiving slope 41. The power receiving connection line 42 can also be bent.

受電共振器コイル４３は、通常、受電板４１の上方に設置される（図１（ｂ）参照）が、これには限られない。また、受電共振器コイル４３は、スパイラルコイルを用いることができる。受電共振器コイル４３は、上述したように、その一端が受電接続線４２を介して受電板４１に接続されているが、他端は、開放（オープン）状態（図１（ａ）、（ｃ）参照）とすることができる。受電共振器コイル４３は、２分の１波長共振モードで共振することになる。 The power receiving resonator coil 43 is usually installed above the power receiving plate 41 (see FIG. 1B), but is not limited thereto. Further, as the power receiving resonator coil 43, a spiral coil can be used. As described above, one end of the power receiving resonator coil 43 is connected to the power receiving plate 41 via the power receiving connection line 42, but the other end is in an open state (FIGS. 1A and 1C). ) Can be used. The power receiving resonator coil 43 resonates in the half wavelength resonance mode.

詳細には、受電装置４は、更に、負荷制御器４４を備えている。負荷制御器４４は、結合ループ４４ａと負荷４４ｂとを有している。結合ループ４４ａは、受電共振器コイル４３に電磁界結合しており、インピーダンスの整合を行う。受電共振器コイル４３に伝送された電力は、結合ループ４４ａを介して負荷４４ｂに供給される。負荷４４ｂは、充電回路など移動体３の所要の機能のための回路である。なお、結合ループ４４ａは、他の公知のインピーダンス整合手段で置き換えることも可能である。 Specifically, the power receiving device 4 further includes a load controller 44. The load controller 44 has a coupling loop 44a and a load 44b. The coupling loop 44a is electromagnetically coupled to the power receiving resonator coil 43 to perform impedance matching. The electric power transmitted to the power receiving resonator coil 43 is supplied to the load 44b via the coupling loop 44a. The load 44b is a circuit for a required function of the mobile body 3 such as a charging circuit. The coupling loop 44a can also be replaced with other known impedance matching means.

以上説明した構成の移動体給電システム１は、送電共振器コイル２３と受電共振器コイル４３が共振することにより、送電装置２から移動体３の受電装置４に給電する。移動体給電システム１は、簡単な構成であり、また、後述する実験で述べるように電力の伝送効率が小さくはならない。また、移動体給電システム１では、移動体３と地面側との間は、対向する受電板４１と送電板２１との間の容量による結合により、電力が非接触で伝送される。従って、伝送効率は、受電板４１が送電板２１に重なった位置に有って重なった面積が変わらなければ、移動体３が横方向にずれても電力の伝送効率が大きく変わることがない。 In the mobile power supply system 1 having the configuration described above, the power transmission resonator coil 23 and the power reception resonator coil 43 resonate to supply power from the power transmission device 2 to the power reception device 4 of the mobile body 3. The mobile power supply system 1 has a simple configuration, and the power transmission efficiency does not decrease as described in an experiment described later. Further, in the mobile power supply system 1, electric power is transmitted non-contact between the mobile body 3 and the ground side by coupling due to the capacitance between the power receiving plate 41 and the power transmitting plate 21 facing each other. Therefore, as for the transmission efficiency, as long as the power receiving plate 41 is located at the position where the power receiving plate 41 overlaps the power transmission plate 21 and the overlapping area does not change, the power transmission efficiency does not change significantly even if the moving body 3 shifts in the lateral direction.

なお、送電板２１は、その面積が比較的大きいので、無視できない浮遊容量が寄生して電力の伝送特性に影響して来る場合がある。この場合、インダクタンス成分を有する部材（例えば、インダクタンス成分が少なくてよい場合は、所定の太さの電気導線など）で接地することでその影響を抑止することも可能である。また、移動体３は、浮遊容量を介して地面側と高周波的につながっている。 Since the area of the power transmission plate 21 is relatively large, a non-negligible stray capacitance may parasitize and affect the power transmission characteristics. In this case, it is also possible to suppress the influence by grounding with a member having an inductance component (for example, if the inductance component may be small, an electric conducting wire having a predetermined thickness or the like). Further, the moving body 3 is connected to the ground side at a high frequency via a stray capacitance.

次に示す移動体給電システム１についての実験は、移動体３の位置が変わったときの電力の伝送特性を確認したものである。図２（ａ）に示す区間１〜区間６に受電板４１（移動体３）を位置させた。図２（ａ）において、区間０が１５ｃｍ、区間１〜区間６がそれぞれ３０．８ｃｍである。送電板２１は、移動方向の長さが２００ｃｍ、横方向の長さが２５ｃｍの銅板とした。受電板４１は、図２（ｂ）に示す形状のもので、移動方向の長さが２０ｃｍ（図２（ｂ）においてＬ４１で示す）、横方向の最大の長さ（図２（ｂ）においてＷ４１で示す）が１４ｃｍ、総面積が約２２０ｃｍ２の銅板加工材を用いた。送電板２１と送電共振器コイル２３の間及び受電板４１と受電共振器コイル４３の間の間はともに、２０ｃｍ離し、その間を送電接続線２２、受電接続線４２で接続した。送電共振器コイル２３と受電共振器コイル４３はともに、線径１ｍｍの銅線を均一ピッチで１５ターン巻いた直径１５ｃｍのスパイラルコイル（自己インダクタンスが１１μＨ、線間容量が２ｐＦ）を用いた。 The following experiment on the mobile power supply system 1 confirms the power transmission characteristics when the position of the mobile body 3 changes. The power receiving plate 41 (moving body 3) was positioned in sections 1 to 6 shown in FIG. 2 (a). In FIG. 2A, section 0 is 15 cm and sections 1 to 6 are 30.8 cm, respectively. The power transmission plate 21 is a copper plate having a length of 200 cm in the moving direction and a length of 25 cm in the lateral direction. The power receiving plate 41 has a shape shown in FIG. 2 (b), has a length of 20 cm in the moving direction ( indicated by L 41 in FIG. 2 (b)), and has a maximum length in the lateral direction (FIG. 2 (b)). A copper plate processed material having a length of 14 cm (shown by W 41 ) and a total area of about 220 cm 2 was used. Both the power transmission plate 21 and the power transmission resonator coil 23 and the power reception plate 41 and the power reception resonator coil 43 were separated by 20 cm, and the distance between them was connected by the power transmission connection line 22 and the power reception connection line 42. For both the power transmission resonator coil 23 and the power reception resonator coil 43, a spiral coil having a diameter of 15 cm (self-inductance of 11 μH, line capacitance of 2 pF) was used, in which a copper wire having a wire diameter of 1 mm was wound at a uniform pitch for 15 turns.

図３に、送電板２１と受電板４１との間の状態を変えて求めた伝送効率を示す。図３の横軸の数字は区間１〜区間６の区間番号である。曲線ａと曲線ｂは、空気層による絶縁を模擬するため、発泡スチロールを送電板２１と受電板４１との間に挿入したものの伝送効率である。送電板２１と受電板４１との間の距離は、曲線ａが２ｃｍ、曲線ｂが８ｃｍである。曲線ｃは、送電坂２１の上に厚さ６ｃｍのコンクリートを設置し、その上に厚さ２ｃｍの発泡スチロールを設置したものの伝送効率である。 FIG. 3 shows the transmission efficiency obtained by changing the state between the power transmission plate 21 and the power reception plate 41. The numbers on the horizontal axis in FIG. 3 are section numbers of sections 1 to 6. Curves a and b are transmission efficiencies in which Styrofoam is inserted between the power transmission plate 21 and the power reception plate 41 in order to simulate insulation by an air layer. The distance between the power transmitting plate 21 and the power receiving plate 41 is 2 cm for the curve a and 8 cm for the curve b. The curve c shows the transmission efficiency of the case where concrete having a thickness of 6 cm is installed on the power transmission slope 21 and styrofoam having a thickness of 2 cm is installed on the concrete.

曲線ａ、ｂ、ｃについて、基本的にどの位置においても安定的に電力が伝送されており、伝送効率は、受電板４１の位置（つまり移動体３位置）により大きくは変わらないことが分かる。曲線ａでは、伝送効率は大体、７０％〜８０％前後である。曲線ｂと曲線ｃではともに、大体、５０％〜６０％であり、それらは同程度である。このように、電力の伝送効率は、小さくはならず、実用化可能な範囲である。なお、図２（ｂ）に示す受電板４１を底面に貼り付けた車のおもちゃを移動体３とした実験において、移動体３（受電装置４）が送電装置２から電力を受電して走行するのを確認している。 It can be seen that, with respect to the curves a, b, and c, electric power is basically stably transmitted at any position, and the transmission efficiency does not change significantly depending on the position of the power receiving plate 41 (that is, the position of the moving body 3). On the curve a, the transmission efficiency is about 70% to 80%. Both curve b and curve c are approximately 50% to 60%, and they are comparable. As described above, the power transmission efficiency does not decrease and is within a practical range. In an experiment in which a car toy with a power receiving plate 41 attached to the bottom surface as shown in FIG. 2B was used as a moving body 3, the moving body 3 (power receiving device 4) receives electric power from the power transmitting device 2 and travels. I have confirmed that.

以上、本発明の実施形態に係る移動体給電システムについて説明したが、本発明は、上述の実施形態に記載したものに限られることなく、特許請求の範囲に記載した事項の範囲内でのさまざまな設計変更が可能である。例えば、本実施形態では、送電板２１の横方向の長さが受電板４１の横方向の長さよりも大きいものを説明したが、図４に示すように、受電板４１の横方向の長さが送電板２１の横方向の長さよりも大きいものとすることも可能である。このようにすると、受電板４１の横方向の長さの余分（図４においてΔＷで示す）だけ移動体３が横方向にずれたとしても、受電板４１と送電板２１との重なった面積が変わらず、電力の伝送効率が大きく変わることがない。また、この場合、送電板２１の総面積を小さくできるので、コストが削減できるとともに送電板２１に寄生する浮遊容量を小さくできる。 Although the mobile power supply system according to the embodiment of the present invention has been described above, the present invention is not limited to the one described in the above-described embodiment, and various matters within the scope of the claims. Design changes are possible. For example, in the present embodiment, the lateral length of the power transmitting plate 21 is larger than the lateral length of the power receiving plate 41, but as shown in FIG. 4, the lateral length of the power receiving plate 41 is described. Can be larger than the lateral length of the power transmission plate 21. In this way, even if the moving body 3 is laterally displaced by the extra lateral length of the power receiving plate 41 (indicated by ΔW in FIG. 4), the overlapping area of the power receiving plate 41 and the power transmitting plate 21 remains. It does not change, and the power transmission efficiency does not change significantly. Further, in this case, since the total area of the power transmission plate 21 can be reduced, the cost can be reduced and the stray capacitance parasitic on the power transmission plate 21 can be reduced.

１ 移動体給電システム
２ 送電装置
２１ 送電板
２２ 送電接続線
２３ 送電共振器コイル
２４ 送電制御器
２４ａ 電力用高周波電源
２４ｂ 結合ループ
３ 移動体
４ 受電装置
４１ 受電板
４２ 受電接続線
４３ 受電共振器コイル
４４ 負荷制御器
４４ａ 結合ループ
４４ｂ 負荷 1 Mobile power supply system 2 Power transmission device 21 Power transmission board 22 Power transmission connection line 23 Power transmission resonator coil 24 Transmission controller 24a High frequency power supply for power 24b Coupling loop 3 Mobile body 4 Power receiving device 41 Power receiving plate 42 Power receiving connection line 43 Power receiving resonator coil 44 Load controller 44a Coupled loop 44b Load

Claims (1)

地面側の送電装置から移動体の受電装置に非接触で給電し得る移動体給電システムであって、
前記送電装置は、
地面表面に沿って延伸する１個のみの送電板と、
該送電板に送電接続線を介して一端が接続され他端が開放され２分の１波長共振モードで共振するスパイラルコイルの送電共振器コイルと、
を備え、
前記受電装置は、
前記送電板に対向する１個のみの受電板と、
該受電板に受電接続線を介して一端が接続され他端が開放され２分の１波長共振モードで共振するスパイラルコイルの受電共振器コイルと、
を備えていることを特徴とする移動体給電システム。 It is a mobile power supply system that can supply power from a power transmission device on the ground side to a power receiving device of a mobile body in a non-contact manner.
The power transmission device
With only one transmission board extending along the ground surface,
A power transmission resonator coil of a spiral coil in which one end is connected to the power transmission plate via a power transmission connection line and the other end is opened and resonates in a half wavelength resonance mode.
With
The power receiving device is
With only one power receiving plate facing the power transmission plate,
A power receiving resonator coil of a spiral coil in which one end is connected to the power receiving plate via a power receiving connection line and the other end is opened and resonates in a half wavelength resonance mode.
A mobile power supply system characterized by being equipped with.
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