JP2020114092A - Non-contact power supply system - Google Patents

Non-contact power supply system Download PDF

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JP2020114092A
JP2020114092A JP2019002950A JP2019002950A JP2020114092A JP 2020114092 A JP2020114092 A JP 2020114092A JP 2019002950 A JP2019002950 A JP 2019002950A JP 2019002950 A JP2019002950 A JP 2019002950A JP 2020114092 A JP2020114092 A JP 2020114092A
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power
circuit
side resonance
power receiving
filter circuit
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統公 木村
Munekimi Kimura
統公 木村
宜久 山口
Yoshihisa Yamaguchi
宜久 山口
正樹 金▲崎▼
Masaki Kanezaki
正樹 金▲崎▼
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Denso Corp
Soken Inc
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Denso Corp
Soken Inc
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Priority to JP2019002950A priority Critical patent/JP2020114092A/en
Priority to PCT/JP2019/051012 priority patent/WO2020145167A1/en
Publication of JP2020114092A publication Critical patent/JP2020114092A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L5/00—Current collectors for power supply lines of electrically-propelled vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/12—Inductive energy transfer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from 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
    • Y02T10/70—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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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

Abstract

To provide a non-contact power supply system capable of performing appropriate power supply while a vehicle is travelling.SOLUTION: A power transmission device 20 of a non-contact power supply system 10 is provided with: an inverter circuit 22; a transmission-side filter circuit 23; and a transmission-side resonance circuit 24 having transmission-side resonance coils 24Lu, 24Lv and 24Lw and transmission-side resonance capacitors 24Cu, 24Cv and 24Cw. A power reception device 30 is provided with: a reception-side resonance circuit 31 having reception-side resonance coils 31Lu, 31Lv and 31Lw and reception-side resonance capacitors 31Cu, 31Cv and 31Cw, a reception-side filter circuit 32, a rectifier 33, and a diode 34. In the transmission-side filter circuit 23, the transmission-side resonance circuit 24, the reception-side resonance circuit 31, and the reception-side filter circuit 32, each circuit is configured such that an input voltage to the transmission-side filter circuit 23 and an output current from the reception-side filter circuit 32 are proportional.SELECTED DRAWING: Figure 1

Description

本発明は、送電装置から受電装置へ非接触で送電する非接触給電システムに関する。 The present invention relates to a contactless power supply system that transmits power from a power transmitting device to a power receiving device in a contactless manner.

電気自動車などに搭載される二次電池に給電を行うシステムとして、非接触で給電を行う非接触給電システムがある。非接触給電システムでは、送電装置側にインバータ回路を設け、そのインバータ回路から送電部（１次側コイル）に交流電力を供給する。そして、送電部から車両側の受電部（２次側コイル）に対して非接触で電力を送電し、受電部から二次電池に対して給電を行う。 As a system for supplying power to a secondary battery mounted on an electric vehicle or the like, there is a contactless power supply system for supplying power in a contactless manner. In the contactless power supply system, an inverter circuit is provided on the power transmission device side, and AC power is supplied from the inverter circuit to the power transmission unit (primary coil). Then, the power is transmitted from the power transmitting unit to the power receiving unit (secondary coil) on the vehicle side in a non-contact manner, and the power receiving unit supplies power to the secondary battery.

特許文献１の非接触給電システムでは、交流電力の出力電力値に対応させてインピーダンスを設定するインピーダンス変換部としてのＤＣ−ＤＣコンバータを備えている。これにより、ＤＣ−ＤＣコンバータに過度な負担が付与されない範囲内で、負荷のインピーダンスの変動に追従させることが可能となっている。 The contactless power supply system of Patent Document 1 includes a DC-DC converter as an impedance conversion unit that sets impedance in accordance with the output power value of AC power. As a result, it is possible to follow the change in the impedance of the load within a range where an excessive load is not applied to the DC-DC converter.

特開２０１６−６３７２６号公報JP, 2016-63726, A

ところで、近年では、車両の走行中に、非接触給電を実施可能にするための非接触給電システムが考案されている。このような車両の走行中に非接触給電を実施する場合、受信遅れが発生するため、上記のように交流電力の出力電力値を受信し、インピーダンスを設定することは困難であった。 By the way, in recent years, a contactless power supply system has been devised for enabling contactless power supply while the vehicle is traveling. When non-contact power feeding is performed while the vehicle is running, a reception delay occurs. Therefore, it is difficult to receive the output power value of the AC power and set the impedance as described above.

本発明は、上記事情に鑑みてなされたものであり、その主たる目的は、車両の走行中に適切な給電を行うことができる非接触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 circumstances, and a main object of the present invention is to provide a contactless power supply system capable of performing appropriate power supply while a vehicle is traveling.

上記課題を解決するための手段は、道路側に設けられる送電装置と車両側に設けられる受電装置との間で、非接触で給電を行い、車両に設けられる蓄電池を充電する非接触給電システムにおいて、前記送電装置は、直流電源から入力した直流電流を交流電流に変換するインバータと、前記インバータに接続されており、所定の周波数域の交流電流を除去する送電側フィルタ回路と、送電側共振コイル及び前記送電側共振コイルに接続される送電側共振コンデンサを有する送電側共振回路と、を備え、前記受電装置は、受電側共振コイル及び前記受電側共振コイルに接続される受電側共振コンデンサを有する受電側共振回路と、前記受電側共振回路に接続されており、所定の周波数域の交流電流を除去する受電側フィルタ回路と、前記受電側フィルタ回路に接続されており、交流電流を直流電流に整流する整流器と、前記整流器に対して直列に接続されており、前記整流器から前記受電装置の出力端子へ流れる電流を許可するダイオードと、を備え、前記送電側フィルタ回路、前記送電側共振回路、前記受電側共振回路及び前記受電側フィルタ回路は、前記送電側フィルタ回路への入力電圧と前記受電側フィルタ回路からの出力電流が比例するように各回路が構成されている。 Means for solving the above-mentioned problem is a non-contact power supply system that performs non-contact power feeding between a power transmission device provided on a road side and a power receiving device provided on a vehicle side to charge a storage battery provided in the vehicle. The power transmitting device includes an inverter that converts a direct current input from a direct current power source into an alternating current, a power transmitting side filter circuit that is connected to the inverter and removes an alternating current in a predetermined frequency range, and a power transmitting side resonance coil. And a power transmission side resonance circuit having a power transmission side resonance capacitor connected to the power transmission side resonance coil, wherein the power reception device has a power reception side resonance coil and a power reception side resonance capacitor connected to the power reception side resonance coil. Power-reception-side resonance circuit, connected to the power-reception-side resonance circuit, and connected to the power-reception-side filter circuit that removes the alternating current in a predetermined frequency range, and the power-reception-side filter circuit, and convert the alternating current into a direct current. A rectifier that rectifies, and a diode that is connected in series to the rectifier and that allows a current to flow from the rectifier to the output terminal of the power receiving device, the power transmission side filter circuit, the power transmission side resonance circuit, Each of the power receiving side resonance circuit and the power receiving side filter circuit is configured such that an input voltage to the power transmitting side filter circuit and an output current from the power receiving side filter circuit are proportional to each other.

車両走行中に非接触給電を行う場合、送電装置と受電装置との間で通信を行うことは、通信遅れの関係上、困難である。このため、送電装置は、車両側の状況、つまり、蓄電池の状況に関わらず、所定の電力を供給することとなる。この場合、充電時間の短縮を考慮して、供給電力はできる限り大きい方が良い。 When performing non-contact power feeding while the vehicle is traveling, it is difficult to perform communication between the power transmitting device and the power receiving device due to a communication delay. Therefore, the power transmission device supplies a predetermined amount of power regardless of the state of the vehicle, that is, the state of the storage battery. In this case, in consideration of shortening the charging time, it is preferable that the supplied power be as large as possible.

一方、このように構成する場合、受電装置側において、電力の調整が必要となる。例えば、整流器からの出力電力（直流電流）を、ＤＣ−ＤＣコンバータなどの昇圧回路で蓄電池の要求電力に応じて電力を調整することが考えられる。特に整流器からの出力電力が定電圧である場合には、電流が途切れる可能性があるため、昇圧回路を設ける必要がある。 On the other hand, in the case of such a configuration, it is necessary to adjust the power on the power receiving device side. For example, it is conceivable that the output power (DC current) from the rectifier is adjusted by a booster circuit such as a DC-DC converter according to the required power of the storage battery. In particular, when the output power from the rectifier is a constant voltage, the current may be interrupted, so it is necessary to provide a booster circuit.

しかしながら、車両のように、大電力を給電する給電システムでは、ＤＣ−ＤＣコンバータのインダクタが大型化することとなる。その結果、収容スペースが限られるにもかかわらず、受電装置が大型化するという問題があった。 However, in a power feeding system that feeds a large amount of power such as a vehicle, the size of the inductor of the DC-DC converter is increased. As a result, there is a problem that the power receiving device becomes large even though the accommodation space is limited.

そこで、送電側フィルタ回路への入力電圧と受電側フィルタ回路からの出力電流が比例するように、送電側フィルタ回路、送電側共振回路、受電側共振回路及び受電側フィルタ回路の各回路を構成した。 Therefore, each circuit of the power transmission side filter circuit, the power transmission side resonance circuit, the power reception side resonance circuit, and the power reception side filter circuit is configured so that the input voltage to the power transmission side filter circuit and the output current from the power reception side filter circuit are proportional to each other. ..

これにより、インバータからの出力電圧と、整流器の出力電流とが比例することとなる。このため、インバータからの出力電圧を一定とすれば、整流器の出力電流を定電流にすることが可能となる。そして、定電流であれば、電流が途切れないため、整流器とダイオードとの間においてインダクタを設ける必要がなくなる。したがって、インダクタを省略又は小型化することができ、受電装置を小型化できる。また、車両の走行中に適切な給電を行うことができる。 As a result, the output voltage from the inverter is proportional to the output current of the rectifier. Therefore, if the output voltage from the inverter is constant, the output current of the rectifier can be made constant. Then, if the current is a constant current, the current is not interrupted, so that it is not necessary to provide an inductor between the rectifier and the diode. Therefore, the inductor can be omitted or downsized, and the power receiving device can be downsized. In addition, it is possible to appropriately supply power while the vehicle is traveling.

非接触給電システムの電気的構成を示す回路図。The circuit diagram showing the electric composition of a non-contact electric power feeding system. 受電制御処理を示すフローチャート。The flowchart which shows a power receiving control process. 非接触給電システムの比較例を示す回路図。The circuit diagram which shows the comparative example of a non-contact electric power feeding system. 電流波形を示すタイムチャート。The time chart which shows a current waveform. 別例における非接触給電システムの電気的構成を示す回路図。The circuit diagram which shows the electric constitution of the non-contact electric power feeding system in another example. 別例における非接触給電システムの電気的構成を示す回路図。The circuit diagram which shows the electric constitution of the non-contact electric power feeding system in another example. 別例における非接触給電システムの電気的構成を示す回路図。The circuit diagram which shows the electric constitution of the non-contact electric power feeding system in another example.

本実施形態における非接触給電システム１０は、商用電源１１から供給された電力を、非接触で送電する送電装置２０、及び、送電装置２０から非接触で電力を受電する受電装置３０を備える。送電装置２０は、車両が走行する道路側（高速道路など）に埋設されている。受電装置３０は、電気自動車やハイブリッド自動車などの車両に搭載され、蓄電池としての車載バッテリ１２に対して電力を出力することで、車載バッテリ１２を充電するものである。 The contactless power supply system 10 according to the present embodiment includes a power transmission device 20 that transmits power supplied from a commercial power supply 11 in a contactless manner, and a power reception device 30 that receives power from the power transmission device 20 in a contactless manner. The power transmission device 20 is embedded on the road side (highway or the like) on which the vehicle travels. The power receiving device 30 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and outputs electric power to the vehicle-mounted battery 12 as a storage battery to charge the vehicle-mounted battery 12.

図１に本実施形態における非接触給電システム１０の電気的構成を示す。非接触給電システム１０の送電装置２０には、商用電源１１が接続されており、商用電源１１から供給される交流電力を送電装置２０に入力するように構成されている。一方、非接触給電システム１０の受電装置３０には、車載バッテリ１２が接続されており、受電装置３０から電力を車載バッテリ１２に出力し、充電が実施されるように構成されている。送電装置２０及び受電装置３０は、３相給電を実施可能とすべく、それぞれ３相（Ｕ相、Ｖ相、Ｗ相）のコイルを有する。 FIG. 1 shows an electrical configuration of the contactless power feeding system 10 according to this embodiment. A commercial power supply 11 is connected to the power transmission device 20 of the contactless power supply system 10, and is configured to input the AC power supplied from the commercial power supply 11 to the power transmission device 20. On the other hand, the in-vehicle battery 12 is connected to the power receiving device 30 of the contactless power supply system 10, and the power receiving device 30 outputs power to the in-vehicle battery 12 to perform charging. The power transmitting device 20 and the power receiving device 30 each have coils of three phases (U phase, V phase, W phase) so that three-phase power feeding can be performed.

まず、送電装置２０について説明する。送電装置２０は、商用電源１１に接続されるＡＣ−ＤＣコンバータ２１と、ＡＣ−ＤＣコンバータ２１に接続されるインバータとしてのインバータ回路２２と、インバータ回路２２に接続される送電側フィルタ回路２３と、送電側フィルタ回路２３に接続される送電側共振回路２４と、を備える。 First, the power transmission device 20 will be described. The power transmission device 20 includes an AC-DC converter 21 connected to the commercial power supply 11, an inverter circuit 22 as an inverter connected to the AC-DC converter 21, a power transmission-side filter circuit 23 connected to the inverter circuit 22, The power transmission side resonance circuit 24 connected to the power transmission side filter circuit 23.

ＡＣ−ＤＣコンバータ２１は、商用電源１１から供給される交流電力を直流電力に変換するものである。そして、ＡＣ−ＤＣコンバータ２１は、変換した直流電力をインバータ回路２２に出力する。このため、インバータ回路２２から見た場合、ＡＣ−ＤＣコンバータ２１は、直流電源に相当する。 The AC-DC converter 21 converts the AC power supplied from the commercial power supply 11 into DC power. Then, the AC-DC converter 21 outputs the converted DC power to the inverter circuit 22. Therefore, when viewed from the inverter circuit 22, the AC-DC converter 21 corresponds to a DC power supply.

インバータとしてのインバータ回路２２は、ＡＣ−ＤＣコンバータ２１から供給される直流電力を所定の周波数の交流電力に変換するものである。このインバータ回路２２として、Ｕ相、Ｖ相、Ｗ相の３相の交流電力に変換する３相インバータを用いている。 The inverter circuit 22 as an inverter converts DC power supplied from the AC-DC converter 21 into AC power having a predetermined frequency. As this inverter circuit 22, a three-phase inverter that converts three-phase AC power of U phase, V phase, and W phase is used.

インバータ回路２２は、ＡＣ−ＤＣコンバータ２１に接続されている。具体的には、ＡＣ−ＤＣコンバータ２１の正極端子にインバータ回路２２の高電位側端子が接続されている。一方、ＡＣ−ＤＣコンバータ２１の負極端子にインバータ回路２２の低電位側端子が接続されている。 The inverter circuit 22 is connected to the AC-DC converter 21. Specifically, the high potential side terminal of the inverter circuit 22 is connected to the positive terminal of the AC-DC converter 21. On the other hand, the low potential side terminal of the inverter circuit 22 is connected to the negative terminal of the AC-DC converter 21.

インバータ回路２２は、それぞれ３相の相数と同数の上下アームを有するフルブリッジ回路により構成されている。各アームに設けられたスイッチング素子のオンオフにより、各相における電流が調整される。 The inverter circuit 22 is composed of a full-bridge circuit having upper and lower arms of the same number as the number of three phases. The current in each phase is adjusted by turning on/off the switching element provided in each arm.

詳しく説明すると、インバータ回路２２は、Ｕ相、Ｖ相及びＷ相からなる３相において、スイッチング素子としての上アームスイッチＳｐと下アームスイッチＳｎとの直列接続体をそれぞれ備えている。本実施形態では、各相における上アームスイッチＳｐ及び下アームスイッチＳｎとして、電圧制御形の半導体スイッチング素子を用いており、具体的にはＩＧＢＴを用いている。なお、ＭＯＳＦＥＴを用いてもよい。各相における上アームスイッチＳｐ及び下アームスイッチＳｎには、それぞれフリーホイールダイオード（還流ダイオード）Ｄｐ，Ｄｎが逆並列に接続されている。 More specifically, the inverter circuit 22 includes a series connection body of an upper arm switch Sp and a lower arm switch Sn as switching elements in each of the three phases of U phase, V phase and W phase. In this embodiment, a voltage-controlled semiconductor switching element is used as the upper arm switch Sp and the lower arm switch Sn in each phase, and specifically, an IGBT is used. A MOSFET may be used. Free wheel diodes (reflux diodes) Dp and Dn are connected in antiparallel to the upper arm switch Sp and the lower arm switch Sn in each phase, respectively.

各相の上アームスイッチＳｐの高電位側端子（コレクタ）は、ＡＣ−ＤＣコンバータ２１の正極端子に接続されている。また、各相の下アームスイッチＳｎの低電位側端子（エミッタ）は、ＡＣ−ＤＣコンバータ２１の負極端子（グランド）に接続されている。各相の上アームスイッチＳｐと下アームスイッチＳｎとの間の中間接続点は、それぞれ送電側フィルタ回路２３に接続されている。 The high-potential-side terminal (collector) of the upper arm switch Sp of each phase is connected to the positive terminal of the AC-DC converter 21. The low-potential side terminal (emitter) of the lower arm switch Sn of each phase is connected to the negative terminal (ground) of the AC-DC converter 21. Intermediate connection points between the upper arm switch Sp and the lower arm switch Sn of each phase are connected to the power transmission side filter circuit 23, respectively.

すなわち、Ｕ相における上アームスイッチＳｐと下アームスイッチＳｎとの間の中間接続点には、送電側フィルタ回路２３等を介して、送電側共振回路２４のＵ相の送電側共振コイル２４Ｌｕに接続されている。同様に、Ｖ相における上アームスイッチＳｐと下アームスイッチＳｎとの間の中間接続点には、送電側フィルタ回路２３等を介して、送電側共振回路２４のＶ相の送電側共振コイル２４Ｌｖに接続されている。同様に、Ｗ相における上アームスイッチＳｐと下アームスイッチＳｎとの間の中間接続点には、送電側フィルタ回路２３等を介して、送電側共振回路２４のＷ相の送電側共振コイル２４Ｌｗに接続されている。 That is, the intermediate connection point between the upper arm switch Sp and the lower arm switch Sn in the U phase is connected to the U phase power transmission side resonance coil 24Lu of the power transmission side resonance circuit 24 via the power transmission side filter circuit 23 and the like. Has been done. Similarly, an intermediate connection point between the upper arm switch Sp and the lower arm switch Sn in the V phase is connected to the V phase power transmission side resonance coil 24Lv of the power transmission side resonance circuit 24 via the power transmission side filter circuit 23 and the like. It is connected. Similarly, at the intermediate connection point between the upper arm switch Sp and the lower arm switch Sn in the W phase, the power transmission side resonance circuit 24Lw is connected to the W phase power transmission side resonance coil 24Lw of the power transmission side resonance circuit 24 via the power transmission side filter circuit 23 and the like. It is connected.

送電側フィルタ回路２３は、インバータ回路２２から入力される交流電力から所定の周波数域の交流電力（交流電流）を除去する回路である。この送電側フィルタ回路２３として、ローパスフィルタを用いている。本実施形態において、送電側フィルタ回路２３は、入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器（インピーダンス・アドミタンス変換器）である。 The power transmission side filter circuit 23 is a circuit that removes AC power (AC current) in a predetermined frequency range from the AC power input from the inverter circuit 22. A low pass filter is used as the power transmission side filter circuit 23. In the present embodiment, the power transmission side filter circuit 23 is an immittance converter (impedance admittance converter) in which the input voltage is proportional to the output current and the input current is proportional to the output voltage.

具体的に説明すると、送電側フィルタ回路２３は、各相ごとに、２つのリアクトル２３ａ，２３ｂが直列接続された直列接続体を備えている。また、送電側フィルタ回路２３は、各直列接続体の中間接続点に対して一端が接続されるコンデンサ２３ｃを直列接続体ごとにそれぞれ備える。各コンデンサ２３ｃの他端は、接続点（中性点）Ｎ１で接続されている。つまり、各コンデンサ２３ｃの他端同士が接続されている。 More specifically, the power transmission side filter circuit 23 includes a series connection body in which two reactors 23a and 23b are connected in series for each phase. Further, the power transmission side filter circuit 23 includes a capacitor 23c, one end of which is connected to the intermediate connection point of each series connection body, for each series connection body. The other end of each capacitor 23c is connected at a connection point (neutral point) N1. That is, the other ends of the capacitors 23c are connected to each other.

送電側共振回路２４は、送電側フィルタ回路２３から入力した交流電力を受電装置３０に対して出力する回路である。送電側共振回路２４は、各相ごとに、送電側共振コンデンサ２４Ｃｕ，２４Ｃｖ，２４Ｃｗと、送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗとが直列接続されたＬＣ共振回路が設けられている。ＬＣ共振回路の一端は、送電側フィルタ回路２３に接続されており、他端は、中性点Ｎ２に接続されている。 The power transmission side resonance circuit 24 is a circuit that outputs the AC power input from the power transmission side filter circuit 23 to the power reception device 30. The power transmission side resonance circuit 24 is provided with an LC resonance circuit in which the power transmission side resonance capacitors 24Cu, 24Cv, 24Cw and the power transmission side resonance coils 24Lu, 24Lv, 24Lw are connected in series for each phase. One end of the LC resonance circuit is connected to the power transmission side filter circuit 23, and the other end is connected to the neutral point N2.

受電装置３０は、送電側共振回路２４から電力を供給される受電側共振回路３１と、受電側共振回路３１に接続される受電側フィルタ回路３２と、受電側フィルタ回路３２に接続される整流器としての整流回路３３と、整流回路３３に接続されるダイオード３４と、整流回路３３に接続されるスイッチ部３５と、ダイオード３４に接続されるコンデンサ３６と、を備える。 The power receiving device 30 serves as a power receiving side resonance circuit 31 supplied with power from the power transmitting side resonance circuit 24, a power receiving side filter circuit 32 connected to the power receiving side resonance circuit 31, and a rectifier connected to the power receiving side filter circuit 32. The rectifier circuit 33, the diode 34 connected to the rectifier circuit 33, the switch unit 35 connected to the rectifier circuit 33, and the capacitor 36 connected to the diode 34.

受電側共振回路３１は、非接触で送電側共振回路２４から電力を入力し、受電側フィルタ回路３２に出力する回路である。受電側共振回路３１は、送電側共振回路２４と同一の構成となっており、送電側共振回路２４に対して磁場共鳴可能に構成されている。 The power receiving side resonance circuit 31 is a circuit that inputs power from the power transmission side resonance circuit 24 in a non-contact manner and outputs the power to the power receiving side filter circuit 32. The power receiving side resonance circuit 31 has the same configuration as the power transmission side resonance circuit 24, and is configured to be capable of magnetic field resonance with the power transmission side resonance circuit 24.

すなわち、受電側共振回路３１は、各相ごとに、受電側共振コンデンサ３１Ｃｕ，３１Ｃｖ，３１Ｃｗと、受電側共振コイル３１Ｌｕ，３１Ｌｖ，３１Ｌｗとが直列接続されたＬＣ共振回路が設けられている。ＬＣ共振回路の一端は、中性点Ｎ３に接続され、他端は、受電側フィルタ回路３２に接続されている。この受電側共振回路３１と送電側共振回路２４との共振周波数は同一に設定されている。 That is, the power receiving side resonance circuit 31 is provided with an LC resonance circuit in which the power receiving side resonance capacitors 31Cu, 31Cv, 31Cw and the power receiving side resonance coils 31Lu, 31Lv, 31Lw are connected in series for each phase. One end of the LC resonance circuit is connected to the neutral point N3, and the other end is connected to the power receiving side filter circuit 32. The resonance frequencies of the power receiving side resonance circuit 31 and the power transmission side resonance circuit 24 are set to be the same.

受電側フィルタ回路３２は、受電側共振回路３１から入力される交流電力に含まれる所定の周波数域の交流電力を除去するものである。この受電側フィルタ回路３２として、ローパスフィルタを用いている。本実施形態において、受電側フィルタ回路３２は、入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器（インピーダンス・アドミタンス変換器）である。 The power receiving side filter circuit 32 removes AC power in a predetermined frequency range included in the AC power input from the power receiving side resonance circuit 31. A low pass filter is used as the power receiving side filter circuit 32. In the present embodiment, the power receiving side filter circuit 32 is an immittance converter (impedance admittance converter) in which the input voltage is proportional to the output current and the input current is proportional to the output voltage.

具体的に説明すると、受電側フィルタ回路３２は、各相ごとに、２つのリアクトル３２ａ，３２ｂが直列接続された直列接続体を備えている。また、受電側フィルタ回路３２は、各直列接続体の中間接続点に対して一端が接続されるコンデンサ３２ｃを直列接続体ごとに備える。各コンデンサ３２ｃの他端は、接続点（中性点）Ｎ４で接続されている。つまり、各コンデンサ３２ｃの他端同士が接続されている。 Specifically, the power receiving side filter circuit 32 includes a series connection body in which two reactors 32a and 32b are connected in series for each phase. Further, the power receiving side filter circuit 32 includes a capacitor 32c, one end of which is connected to the intermediate connection point of each series connection body, for each series connection body. The other end of each capacitor 32c is connected at a connection point (neutral point) N4. That is, the other ends of the capacitors 32c are connected to each other.

整流回路３３は、交流電力を全波整流する回路である。本実施形態では、整流回路３３として、ダイオードブリッジから構成される全波整流回路を採用したが、６つのスイッチング素子（例えばＭＯＳＦＥＴ）から構成される同期整流回路を用いてもよい。 The rectifier circuit 33 is a circuit that full-wave rectifies AC power. In this embodiment, the full-wave rectifier circuit including the diode bridge is adopted as the rectifier circuit 33, but a synchronous rectifier circuit including six switching elements (for example, MOSFETs) may be used.

ダイオード３４は、整流回路３３（の出力端子）に対して直列に接続されており、整流回路３３から受電装置３０の出力端子３０ａへ流れる電流を許可する。なお、ダイオード３４と整流回路３３との間には、リアクタンス等が接続されておらず、ダイオード３４は、整流回路３３に直接接続されている。 The diode 34 is connected in series to (the output terminal of) the rectifying circuit 33, and permits the current flowing from the rectifying circuit 33 to the output terminal 30 a of the power receiving device 30. Note that no reactance or the like is connected between the diode 34 and the rectifier circuit 33, and the diode 34 is directly connected to the rectifier circuit 33.

スイッチ部３５は、整流回路３３とグランド端子と間における通電及び通電遮断を切り替えるスイッチング素子である。スイッチ部３５として、電圧制御形の半導体スイッチング素子を用いており、具体的にはＩＧＢＴを用いている。なお、ＭＯＳＦＥＴを用いてもよい。スイッチ部３５には、それぞれフリーホイールダイオード（還流ダイオード）が逆並列に接続されている。スイッチ部３５は、整流回路３３に対して並列に接続されている。つまり、スイッチ部３５は、その一端が整流回路３３の高電位側端子に接続されている。より詳しくは、スイッチ部３５の一端は、ダイオード３４と、整流回路３３とを繋ぐ経路上の接続点Ｎ５に対して接続されている。また、スイッチ部３５の他端は、整流回路３３の低電位側端子に接続されている。 The switch unit 35 is a switching element that switches between energization and energization interruption between the rectifier circuit 33 and the ground terminal. As the switch unit 35, a voltage control type semiconductor switching element is used, and specifically, an IGBT is used. A MOSFET may be used. Free wheel diodes (free wheeling diodes) are connected to the switch portions 35 in antiparallel. The switch unit 35 is connected in parallel to the rectifier circuit 33. That is, one end of the switch unit 35 is connected to the high potential side terminal of the rectifier circuit 33. More specifically, one end of the switch unit 35 is connected to a connection point N5 on the path connecting the diode 34 and the rectifier circuit 33. The other end of the switch unit 35 is connected to the low potential side terminal of the rectifier circuit 33.

コンデンサ３６は、ダイオード３４（のカソード）と受電装置３０の出力端子３０ａとの間における電気経路上の接続点Ｎ６に一端が接続され、他端がグランド端子に接続されている。 The capacitor 36 has one end connected to a connection point N6 on the electrical path between (the cathode of) the diode 34 and the output terminal 30a of the power receiving device 30, and the other end connected to the ground terminal.

そして、受電装置３０の高電位側の出力端子３０ａが、車載バッテリ１２の陽極端子に接続され、低電位側の出力端子３０ｂが車載バッテリ１２の負極端子に接続されている。車載バッテリ１２は、受電装置３０から入力された直流電力を充電する。 The high-potential-side output terminal 30a of the power receiving device 30 is connected to the positive terminal of the vehicle-mounted battery 12, and the low-potential-side output terminal 30b is connected to the negative terminal of the vehicle-mounted battery 12. The in-vehicle battery 12 charges the DC power input from the power receiving device 30.

また、送電装置２０には、送電装置２０の制御を行う送電制御部６０が設けられており、受電装置３０には、受電装置３０の制御を行う受電制御部７０が設けられている。送電制御部６０は、ＡＣ−ＤＣコンバータ２１やインバータ回路２２の制御を行う。受電制御部７０は、スイッチ部３５の制御を行う。 Further, the power transmission device 20 is provided with a power transmission control unit 60 that controls the power transmission device 20, and the power reception device 30 is provided with a power reception control unit 70 that controls the power reception device 30. The power transmission control unit 60 controls the AC-DC converter 21 and the inverter circuit 22. The power reception control unit 70 controls the switch unit 35.

また、車両には、ＥＣＵ５０（Electronic Control Unit）が設けられており、受電制御部７０に対して指示を行い、車両の走行中に非接触給電を実施させ、車載バッテリ１２を充電させる。具体的には、ＥＣＵ５０は、車載バッテリ１２の状態（電圧や温度等）を取得し、要求電力を算出する。そして、ＥＣＵ５０は、算出した要求電力を指令値として受電制御部７０に出力する。受電制御部７０は、指令値に基づいてスイッチ部３５を制御する。 Further, the vehicle is provided with an ECU 50 (Electronic Control Unit), which gives an instruction to the power reception control unit 70 to perform non-contact power supply while the vehicle is traveling to charge the vehicle-mounted battery 12. Specifically, the ECU 50 acquires the state (voltage, temperature, etc.) of the vehicle-mounted battery 12 and calculates the required power. Then, the ECU 50 outputs the calculated required power as a command value to the power reception control unit 70. The power reception control unit 70 controls the switch unit 35 based on the command value.

上記構成によれば、送電装置２０及び受電装置３０の相対位置が磁場共鳴可能な位置にある状況において、交流電力が送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗに入力された場合、送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗと、受電側共振コイル３１Ｌｕ，３１Ｌｖ，３１Ｌｗとが、磁場共鳴する。これにより、受電装置３０は、送電装置２０からエネルギーの一部を受け取る。すなわち、交流電力を受電する。なお、本実施形態では、説明の都合上、送電装置２０及び受電装置３０の相対位置が磁場共鳴可能な位置にあることを前提とする。 According to the above configuration, in a situation where the relative positions of the power transmitting device 20 and the power receiving device 30 are in positions where magnetic field resonance is possible, when AC power is input to the power transmitting resonance coils 24Lu, 24Lv, 24Lw, the power transmitting resonance coil 24Lu. , 24Lv, 24Lw and the power receiving side resonance coils 31Lu, 31Lv, 31Lw resonate with each other in the magnetic field. As a result, the power receiving device 30 receives a part of the energy from the power transmitting device 20. That is, AC power is received. Note that, in the present embodiment, for convenience of description, it is assumed that the relative positions of the power transmission device 20 and the power reception device 30 are at positions where magnetic field resonance is possible.

ところで、上記非接触給電システム１０は、車両の走行中に非接触で給電を実施可能とすることを目的としている。このため、送電装置２０と、受電装置３０との間における通信は、通信遅れが生じる可能性があるため、要求電力の送受信などの通信は、原則として実施しないこととしている。 By the way, the non-contact power feeding system 10 is intended to enable non-contact power feeding while the vehicle is traveling. Therefore, communication between the power transmitting device 20 and the power receiving device 30 may cause communication delay, and thus communication such as transmission/reception of required power is not performed in principle.

このため、送電装置は、車両側の状況、つまり、蓄電池の状況に関わらず、所定の電力を供給することとなる。この場合、充電時間の短縮や送電装置及び受電装置の相対位置が理想的な状態からずれることなどを考慮して、供給電力はできる限り大きい方が良い。そこで、本実施形態において、送電装置２０は、出力可能な最大電力を供給するようにしている。具体的には、送電制御部６０は、インバータ回路２２の駆動デューティをフルデューティなどの固定値に設定する。 Therefore, the power transmission device supplies a predetermined amount of power regardless of the state of the vehicle, that is, the state of the storage battery. In this case, it is preferable that the supplied power be as large as possible in consideration of shortening the charging time and the relative positions of the power transmitting device and the power receiving device deviating from the ideal state. Therefore, in the present embodiment, the power transmission device 20 is configured to supply the maximum power that can be output. Specifically, the power transmission control unit 60 sets the drive duty of the inverter circuit 22 to a fixed value such as full duty.

しかしながら、最大電力が供給された場合、受電装置３０の側において、車載バッテリ１２の要求電圧によっては必要がない場合がある。つまり、要求電力に対して過大な電力が供給される可能性がある。過大な電力で充電されると、車載バッテリ１２が過充電状態となる場合や、劣化が促進される。また、送電装置２０及び受電装置３０の位置ずれやコイル間距離の変動によるコイル間結合係数が変動し、出力電力は変動するといった問題もある。したがって、受電装置３０の側において、車載バッテリ１２への出力電力の調整が必要とされている。 However, when the maximum power is supplied, it may not be necessary depending on the required voltage of the vehicle-mounted battery 12 on the power receiving device 30 side. That is, there is a possibility that excessive power is supplied with respect to the required power. When the vehicle-mounted battery 12 is overcharged or is deteriorated when it is charged with excessive electric power. In addition, there is a problem that the inter-coil coupling coefficient fluctuates due to the positional deviation of the power transmission device 20 and the power reception device 30 and the fluctuation of the inter-coil distance, and thus the output power fluctuates. Therefore, it is necessary to adjust the output power to the vehicle-mounted battery 12 on the power receiving device 30 side.

そこで、従来においては、整流回路３３と車載バッテリ１２との間にＤＣ−ＤＣコンバータなどの昇圧回路を設けることが考えられていた。そして、整流回路３３からの出力電力（直流電流）を、車載バッテリ１２の要求電力に応じて昇圧していた。これにより、要求電力に応じて、安定した電力が車載バッテリ１２に供給されていた。 Therefore, conventionally, it has been considered to provide a booster circuit such as a DC-DC converter between the rectifier circuit 33 and the vehicle-mounted battery 12. Then, the output power (DC current) from the rectifier circuit 33 is boosted according to the required power of the vehicle-mounted battery 12. As a result, stable power is supplied to the vehicle-mounted battery 12 according to the required power.

しかしながら、車両のように、大電力を給電する非接触給電システムでは、ＤＣ−ＤＣコンバータのリアクタンスが大型化することとなる。その結果、収容スペースが限られるにもかかわらず、受電装置が大型化するという問題があった。その一方で、リアクタンスを削除する構成とすると、整流回路３３からの出力電力が定電流でない場合、電流が途切れてしまい、安定した出力電力を供給することができないという問題あった。 However, in a contactless power feeding system that feeds a large amount of power, such as a vehicle, the reactance of the DC-DC converter becomes large. As a result, there is a problem that the power receiving device becomes large even though the accommodation space is limited. On the other hand, if the reactance is eliminated, there is a problem that if the output power from the rectifier circuit 33 is not a constant current, the current is interrupted and stable output power cannot be supplied.

そこで、送電側フィルタ回路２３への入力電圧と受電側フィルタ回路３２からの出力電流が比例するように、送電側フィルタ回路２３、送電側共振回路２４、受電側共振回路３１路及び受電側フィルタ回路３２の各回路を構成した。 Therefore, the power transmission side filter circuit 23, the power transmission side resonance circuit 24, the power reception side resonance circuit 31 path, and the power reception side filter circuit are arranged so that the input voltage to the power transmission side filter circuit 23 and the output current from the power reception side filter circuit 32 are proportional to each other. 32 circuits were constructed.

具体的には、送電側フィルタ回路２３及び受電側フィルタ回路３２を、入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器により構成した。また、送電側共振回路２４において、送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗは、送電側共振コンデンサ２４Ｃｕ，２４Ｃｖ，２４Ｃｗが直列接続されているようにした。そして、受電側共振回路３１において、受電側共振コイル３１Ｌｕ，３１Ｌｖ，３１Ｌｗは、受電側共振コンデンサ３１Ｃｕ，３１Ｃｖ，３１Ｃｗが直列接続されているようにした。すなわち、一次側直列二次側直列のＳＳ方式のコイルとしている。ＳＳ方式では、定電流で出力されることとなる。 Specifically, the power transmission side filter circuit 23 and the power reception side filter circuit 32 are configured by immittance converters in which the input voltage and the output current are proportional and the input current and the output voltage are proportional. In the power transmission side resonance circuit 24, the power transmission side resonance coils 24Lu, 24Lv, 24Lw are configured such that the power transmission side resonance capacitors 24Cu, 24Cv, 24Cw are connected in series. In the power receiving side resonance circuit 31, the power receiving side resonance coils 31Lu, 31Lv, 31Lw are configured such that the power receiving side resonance capacitors 31Cu, 31Cv, 31Cw are connected in series. That is, the primary side series secondary side series SS system coil is used. In the SS method, a constant current is output.

上記構成により、送電側フィルタ回路２３への入力電圧と受電側フィルタ回路３２からの出力電流が比例することを以下の数式を用いて示す。なお、本実施形態では、Ｕ相のみについて示すが、Ｖ相、Ｗ相も同様である。数式（１）に送電側フィルタ回路２３のインピーダンスを示す。送電側フィルタ回路２３のインピーダンスを、Ｘｃ１で示し、コンデンサ２３ｃの容量を、Ｃ１１で示し、リアクトル２３ａのインピーダンスをＬ１１で示し、リアクトル２３ｂのインピーダンスをＬ１２で示す。インバータ回路２２の駆動周波数を、ωで示す。

Figure 2020114092
The following formula shows that the input voltage to the power transmitting side filter circuit 23 and the output current from the power receiving side filter circuit 32 are proportional to each other with the above configuration. Although only the U phase is shown in the present embodiment, the same applies to the V phase and the W phase. Equation (1) shows the impedance of the power transmission side filter circuit 23. The impedance of the power transmission side filter circuit 23 is indicated by Xc1, the capacitance of the capacitor 23c is indicated by C11, the impedance of the reactor 23a is indicated by L11, and the impedance of the reactor 23b is indicated by L12. The drive frequency of the inverter circuit 22 is indicated by ω.
Figure 2020114092

また、数式（２）に受電側フィルタ回路３２のインピーダンスを示す。受電側フィルタ回路３２のインピーダンスを、Ｘｃ２で示し、コンデンサ３２ｃの容量を、Ｃ２１で示し、リアクトル３２ａのインピーダンスをＬ２１で示し、リアクトル３２ｂのインピーダンスをＬ２２で示す。インバータ回路２２の駆動周波数（角周波数）を、ωで示す。

Figure 2020114092
Further, the equation (2) shows the impedance of the power receiving side filter circuit 32. The impedance of the power receiving side filter circuit 32 is indicated by Xc2, the capacitance of the capacitor 32c is indicated by C21, the impedance of the reactor 32a is indicated by L21, and the impedance of the reactor 32b is indicated by L22. The drive frequency (angular frequency) of the inverter circuit 22 is indicated by ω.
Figure 2020114092

そして、数式（３）に送電側共振コイル２４Ｌｕと、受電側共振コイル３１Ｌｕとの間における相互インダクタンスと、そのインピーダンスを示す。受電側共振コイル３１Ｌｕとの間における相互インダクタンスを、Ｌｍで示し、そのインピーダンスを、Ｘｍで示す。

Figure 2020114092
Then, Equation (3) shows the mutual inductance between the power transmitting side resonance coil 24Lu and the power receiving side resonance coil 31Lu and the impedance thereof. Mutual inductance between the power receiving side resonance coil 31Lu is indicated by Lm, and its impedance is indicated by Xm.
Figure 2020114092

また、数式（４）に、送電側共振回路２４における送電側共振コイル２４Ｌｕと送電側共振コンデンサ２４Ｃｕとの関係、及び受電側共振回路３１における受電側共振コイル３１Ｌｕと受電側共振コンデンサ３１Ｃｕとの関係を示す。送電側共振コイル２４Ｌｕのインピーダンスを、Ｌ１で示し、送電側共振コンデンサ２４Ｃｕの容量を、Ｃｓ１で示す。受電側共振コイル３１Ｌｕのインピーダンスを、Ｌ２で示し、受電側共振コンデンサ３１Ｃｕの容量を、Ｃｓ２で示す。また、数式（５）に共振周波数と、共振時におけるインバータ回路２２の駆動周波数との関係を示す。共振周波数を、ｆ０で示し、共振時におけるインバータ回路２２の駆動周波数を、ω０で示す。

Figure 2020114092
Further, in the equation (4), the relationship between the power transmission side resonance coil 24Lu and the power transmission side resonance capacitor 24Cu in the power transmission side resonance circuit 24, and the relationship between the power reception side resonance coil 31Lu and the power reception side resonance capacitor 31Cu in the power reception side resonance circuit 31. Indicates. The impedance of the power transmission resonance coil 24Lu is shown by L1, and the capacitance of the power transmission resonance capacitor 24Cu is shown by Cs1. The impedance of the power receiving side resonance coil 31Lu is shown by L2, and the capacity of the power receiving side resonance capacitor 31Cu is shown by Cs2. In addition, the relationship between the resonance frequency and the drive frequency of the inverter circuit 22 at the time of resonance is shown in Expression (5). The resonance frequency is indicated by f0, and the drive frequency of the inverter circuit 22 at the time of resonance is indicated by ω0.
Figure 2020114092

そして、前述したように、送電側フィルタ回路２３及び受電側フィルタ回路３２を、入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器により構成している。このため、送電側フィルタ回路２３への入力電圧及び入力電流と、受電側フィルタ回路３２からの出力電圧と出力電流の関係は、数式（６）〜（８）に示すようになる。送電側フィルタ回路２３への入力電圧を、Ｖ１とし、入力電流を、Ｉ１としている。また、受電側フィルタ回路３２からの出力電圧を、Ｖ２とし、出力電流を、Ｉ２としている。なお、送電側フィルタ回路２３への入力電圧及び入力電流は、インバータ回路２２からの出力電圧及び出力電流ともいえる。受電側フィルタ回路３２からの出力電圧と出力電流は、整流回路３３への入力電圧及び入力電流ともいえる。

Figure 2020114092
Then, as described above, the power transmitting side filter circuit 23 and the power receiving side filter circuit 32 are configured by immittance converters in which the input voltage and the output current are proportional and the input current and the output voltage are proportional. Therefore, the relationships between the input voltage and the input current to the power transmission side filter circuit 23 and the output voltage and the output current from the power reception side filter circuit 32 are as shown in Formulas (6) to (8). The input voltage to the power transmission side filter circuit 23 is V1, and the input current is I1. The output voltage from the power receiving side filter circuit 32 is V2, and the output current is I2. The input voltage and the input current to the power transmission side filter circuit 23 can be said to be the output voltage and the output current from the inverter circuit 22. It can be said that the output voltage and the output current from the power receiving side filter circuit 32 are the input voltage and the input current to the rectifier circuit 33.
Figure 2020114092

よって、インバータ回路２２の出力電圧と、整流回路３３への入力電流の関係は、数式（９）に示すようになる。つまり、インバータ回路２２の出力電圧と、整流回路３３への入力電流とは、比例関係となる。

Figure 2020114092
Therefore, the relationship between the output voltage of the inverter circuit 22 and the input current to the rectifier circuit 33 is as shown in Expression (9). That is, the output voltage of the inverter circuit 22 and the input current to the rectifier circuit 33 have a proportional relationship.
Figure 2020114092

したがって、インバータ回路２２の出力電圧を一定電圧とすれば、整流回路３３への入力電流は定電流となる。整流回路３３からの出力電力が定電流となるため、整流回路３３とダイオード３４との間におけるリアクタンスを削除しても、電流が途切れることなくなる。 Therefore, if the output voltage of the inverter circuit 22 is a constant voltage, the input current to the rectifier circuit 33 is a constant current. Since the output power from the rectifier circuit 33 becomes a constant current, even if the reactance between the rectifier circuit 33 and the diode 34 is deleted, the current will not be interrupted.

次に、受電制御部７０による受電制御処理について図２に基づいて説明する。受電制御処理は、受電制御部７０により所定周期ごとに実行される。 Next, power reception control processing by the power reception control unit 70 will be described based on FIG. The power reception control process is executed by the power reception control unit 70 at predetermined intervals.

まず、受電制御部７０は、ＥＣＵ５０から要求電力の指令値を取得する（ステップＳ１０１）。次に、受電制御部７０は、電圧センサから出力電圧の値を取得するとともに、電流センサから出力電流の値を取得する（ステップＳ１０２）。ステップＳ１０２において取得する出力電圧の値は、高電位側の出力端子３０ａと、低電位側の出力端子３０ｂとの間における電圧値である。また、ステップＳ１０２において取得する出力電流の値は、低電位側の出力端子３０ｂと整流回路３３の低電位側の端子との間における電気経路において、流れる電流値である。そして、受電制御部７０は、取得した出力電圧の値と、出力電流の値とに基づいて充電可能電力を算出する。 First, the power reception control unit 70 acquires a command value of required power from the ECU 50 (step S101). Next, the power reception control unit 70 acquires the value of the output voltage from the voltage sensor and the value of the output current from the current sensor (step S102). The value of the output voltage acquired in step S102 is the voltage value between the output terminal 30a on the high potential side and the output terminal 30b on the low potential side. The value of the output current acquired in step S102 is the value of the current flowing in the electrical path between the low potential side output terminal 30b and the low potential side terminal of the rectifier circuit 33. Then, the power reception control unit 70 calculates the chargeable power based on the obtained output voltage value and output current value.

次に、受電制御部７０は、充電可能電力と要求電力とを比較し、スイッチ部３５を制御する（ステップＳ１０３）。つまり、受電制御部７０は、充電可能電力と要求電力と差分に基づいてスイッチ部３５のオン・オフデューティ比を決定し、スイッチ部３５を制御する。その際、ＰＩ制御等のフィードバック制御を行うことが望ましい。 Next, the power reception control unit 70 compares the chargeable power with the required power and controls the switch unit 35 (step S103). That is, the power reception control unit 70 determines the on/off duty ratio of the switch unit 35 based on the difference between the chargeable power and the required power, and controls the switch unit 35. At that time, it is desirable to perform feedback control such as PI control.

上記構成を採用し、上記受電制御を実施した場合における作用について説明する。 The operation when the above configuration is adopted and the above power reception control is performed will be described.

まず、図３に、本実施形態における回路に対する比較例を示す。比較例の回路では、整流回路３３とダイオード３４との間に昇圧チョッパ用（エネルギー蓄積用）のインダクタ１０Ｌを設け、かつ、平滑コンデンサ１０Ｃを設けている。この場合、図４（ａ）に示すような理想的な電流波形の出力電流を得ることができる。ただし、インダクタ１０Ｌを設けているため、受電装置３０が大型化する懸念がある。 First, FIG. 3 shows a comparative example with respect to the circuit of the present embodiment. In the circuit of the comparative example, the inductor 10L for the step-up chopper (for energy storage) is provided between the rectifier circuit 33 and the diode 34, and the smoothing capacitor 10C is provided. In this case, an output current having an ideal current waveform as shown in FIG. 4A can be obtained. However, since the inductor 10L is provided, the power receiving device 30 may become large.

一方、図１に示すように整流回路３３とダイオード３４との間におけるインダクタ１０Ｌ及び平滑コンデンサ１０Ｃを削除した場合、図４（ｂ）に示すような電流波形の出力電流を得ることができる。図４に示すように、インダクタ１０Ｌ及び平滑コンデンサ１０Ｃを削除したことにより、出力電流に変動（脈動）が生じるものの、出力電流が途切れることなく、ほぼ一定の出力電流を得ることができる。つまり、インダクタ１０Ｌを削除し、受電装置３０を小型化しつつ、車載バッテリ１２を充電するのに適した出力電力を供給することが可能となっている。 On the other hand, when the inductor 10L and the smoothing capacitor 10C between the rectifier circuit 33 and the diode 34 are removed as shown in FIG. 1, an output current having a current waveform as shown in FIG. 4B can be obtained. As shown in FIG. 4, by removing the inductor 10L and the smoothing capacitor 10C, although the output current fluctuates (pulsates), it is possible to obtain a substantially constant output current without interruption. That is, it is possible to remove the inductor 10L, reduce the size of the power receiving device 30, and supply the output power suitable for charging the in-vehicle battery 12.

以下、本実施形態における効果について説明する。 The effects of this embodiment will be described below.

車両走行中に非接触給電を行う場合、送電装置２０と受電装置３０との間で通信を行うことは、通信遅れの関係上、困難である。このため、送電装置２０は、車両側の状況、つまり、車載バッテリ１２の状況に関わらず、所定の電力（本実施形態では最大電力）を供給している。 When contactless power supply is performed while the vehicle is traveling, it is difficult to perform communication between the power transmission device 20 and the power reception device 30 due to communication delay. Therefore, the power transmission device 20 supplies a predetermined electric power (maximum electric power in the present embodiment) regardless of the state of the vehicle side, that is, the state of the vehicle-mounted battery 12.

一方、このように最大電力を供給する場合、受電装置３０の側において、入力した電力の調整が必要となる。例えば、図３に示すように、整流回路３３からの出力電力（直流電流）を、昇圧回路で車載バッテリ１２の要求電力に応じて電力を調整することが考えられる。このようにすれば、整流回路３３からの出力電流が定電流でなくても、好適に調整することが可能となる。しかしながら、車両のように、大電力を給電する非接触給電システムでは、昇圧回路のインダクタ１０Ｌが大型化することとなる。その結果、収容スペースが限られるにもかかわらず、受電装置３０が大型化するという問題があった。 On the other hand, when the maximum power is supplied in this way, the input power needs to be adjusted on the power receiving device 30 side. For example, as shown in FIG. 3, it is conceivable that the booster circuit adjusts the output power (DC current) from the rectifier circuit 33 according to the required power of the vehicle-mounted battery 12. With this configuration, even if the output current from the rectifier circuit 33 is not a constant current, it is possible to appropriately adjust the current. However, in a contactless power feeding system that feeds a large amount of power, such as a vehicle, the inductor 10L of the booster circuit becomes large. As a result, there is a problem that the power receiving device 30 becomes large even though the accommodation space is limited.

そこで、本実施形態では、送電側フィルタ回路２３への入力電圧と受電側フィルタ回路３２からの出力電流が比例するように、送電側フィルタ回路２３、送電側共振回路２４、受電側共振回路３１及び受電側フィルタ回路３２の各回路を構成した。 Therefore, in the present embodiment, the power transmission side filter circuit 23, the power transmission side resonance circuit 24, the power reception side resonance circuit 31, and the power reception side resonance circuit 31 are arranged so that the input voltage to the power transmission side filter circuit 23 and the output current from the power reception side filter circuit 32 are proportional to each other. Each circuit of the power receiving side filter circuit 32 was configured.

具体的には、送電側フィルタ回路２３及び受電側フィルタ回路３２を、それぞれ入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器とした。また、送電側共振回路２４において、送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗを、送電側共振コンデンサ２４Ｃｕ，２４Ｃｖ，２４Ｃｗに対して直列接続した。そして、受電側共振回路３１において、受電側共振コイル３１Ｌｕ，３１Ｌｖ，３１Ｌｗを、受電側共振コンデンサ３１Ｃｕ，３１Ｃｖ，３１Ｃｗに対して直列接続した。つまり、ＳＳ方式にした。 Specifically, the power transmission side filter circuit 23 and the power reception side filter circuit 32 are immittance converters in which the input voltage and the output current are proportional and the input current and the output voltage are proportional, respectively. Further, in the power transmission side resonance circuit 24, the power transmission side resonance coils 24Lu, 24Lv, 24Lw are connected in series to the power transmission side resonance capacitors 24Cu, 24Cv, 24Cw. Then, in the power receiving side resonance circuit 31, the power receiving side resonance coils 31Lu, 31Lv, 31Lw were connected in series to the power receiving side resonance capacitors 31Cu, 31Cv, 31Cw. That is, the SS method was adopted.

これにより、数式（１）〜（９）に示したように、インバータ回路２２からの出力電圧Ｖ１と、整流回路３３の出力電流Ｉ２とが比例することとなる。このため、インバータ回路２２からの出力電圧を一定とすれば、整流回路３３の出力電流を定電流にすることが可能となる。そして、定電流であれば、電流が途切れないため、整流回路３３とダイオード３４との間においてインダクタを設ける必要がなくなる。したがって、インダクタを省略又は小型化することができ、受電装置３０を小型化できる。 As a result, the output voltage V1 from the inverter circuit 22 and the output current I2 of the rectifier circuit 33 are proportional to each other as shown in the equations (1) to (9). Therefore, if the output voltage from the inverter circuit 22 is constant, the output current of the rectifier circuit 33 can be made constant. Then, if the current is a constant current, the current is not interrupted, so that it is not necessary to provide an inductor between the rectifier circuit 33 and the diode 34. Therefore, the inductor can be omitted or downsized, and the power receiving device 30 can be downsized.

また、受電制御部７０は、受電装置３０の出力電流と出力電圧に基づいて充電可能電力を算出し、車載バッテリ１２の要求電力との比較に基づいて、スイッチ部３５を制御する。これにより、出力電力を調整（抑制）することが可能となり、車載バッテリ１２に対して適切な充電を行うことができる。 In addition, the power reception control unit 70 calculates the chargeable power based on the output current and the output voltage of the power receiving device 30, and controls the switch unit 35 based on the comparison with the required power of the vehicle-mounted battery 12. As a result, the output power can be adjusted (suppressed), and the in-vehicle battery 12 can be appropriately charged.

（他の実施形態）
なお、本発明は上記実施形態に限定されるものではなく、本発明の要旨の範囲内において種々の変形実施が可能である。なお、以下では、各実施形態で互いに同一又は均等である部分には同一符号を付しており、同一符号の部分についてはその説明を援用する。 (Other embodiments)
The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention. In the following description, the same or equivalent parts in each embodiment are designated by the same reference numerals, and the description of the portions having the same reference numerals is cited.

・上記実施形態において、３相の送電側共振コイル２４Ｌｕ，２４Ｌｖ，２４Ｌｗ及び受電側共振コイル３１Ｌｕ，３１Ｌｖ，３１Ｌｗを設けたが、相数を任意に変更してもよい。例えば、図５に示すように、送電側共振回路２４及び受電側共振回路３１を単相にしてもよい。また、図６に示すように送電側共振回路２４を１相とする一方、受電側共振回路３１を２相にした非接触給電システム１０にしてもよい。 In the above embodiment, the three-phase power transmission side resonance coils 24Lu, 24Lv, 24Lw and the power reception side resonance coils 31Lu, 31Lv, 31Lw are provided, but the number of phases may be arbitrarily changed. For example, as shown in FIG. 5, the power transmission side resonance circuit 24 and the power reception side resonance circuit 31 may be single-phase. Alternatively, as shown in FIG. 6, the contactless power supply system 10 may be configured such that the power transmission side resonance circuit 24 has one phase and the power reception side resonance circuit 31 has two phases.

・上記実施形態において、送電側フィルタ回路２３への入力電圧と受電側フィルタ回路３２からの出力電流が比例するのであれば、送電側フィルタ回路２３、送電側共振回路２４、受電側共振回路３１及び受電側フィルタ回路３２の各回路の構成を任意に変更してもよい。例えば、図７に示すような回路構成の非接触給電システム１１０にしてもよい。図７の送電装置１２０において、送電側フィルタ回路１２３は、入力電圧と出力電圧が比例するトランス特性フィルタ回路である。受電装置１３０において、受電側フィルタ回路１３２は、イミタンス変換器である。送電側共振回路１２４において、送電側共振コイル２４Ｌは、送電側共振コンデンサ２４Ｃに対して直列接続されている。一方、受電側共振回路１３１において、受電側共振コイル３１Ｌは、受電側共振コンデンサ３１Ｃに対して並列接続されている。つまり、一次側直列二次側並列のＳＰ方式となっている。このようにしても、送電側フィルタ回路２３への入力電圧と受電側フィルタ回路３２からの出力電流とを比例させることができる。 In the above-described embodiment, if the input voltage to the power transmission side filter circuit 23 and the output current from the power reception side filter circuit 32 are proportional, the power transmission side filter circuit 23, the power transmission side resonance circuit 24, the power reception side resonance circuit 31, and The configuration of each circuit of the power receiving side filter circuit 32 may be arbitrarily changed. For example, the contactless power feeding system 110 having a circuit configuration as shown in FIG. 7 may be used. In the power transmission device 120 of FIG. 7, the power transmission side filter circuit 123 is a transformer characteristic filter circuit in which the input voltage and the output voltage are proportional. In the power receiving device 130, the power receiving side filter circuit 132 is an immittance converter. In the power transmission side resonance circuit 124, the power transmission side resonance coil 24L is connected in series to the power transmission side resonance capacitor 24C. On the other hand, in the power receiving side resonance circuit 131, the power receiving side resonance coil 31L is connected in parallel to the power receiving side resonance capacitor 31C. In other words, it is the SP system of primary side series and secondary side parallel. Even in this case, the input voltage to the power transmitting side filter circuit 23 and the output current from the power receiving side filter circuit 32 can be made proportional.

１０…非接触給電システム、２０…送電装置、２２…インバータ回路、２３…送電側フィルタ回路、２４…送電側共振回路、３０…受電装置、３０ａ…出力端子、３１…受電側共振回路、３２…受電側フィルタ回路、３３…整流回路、３４…ダイオード、２４Ｃｕ，２４Ｃｖ，２４Ｃｗ…送電側共振コンデンサ、２４Ｌｕ，２４Ｌｖ，２４Ｌｗ…送電側共振コイル、３１Ｃｕ，３１Ｃｖ，３１Ｃｗ…受電側共振コンデンサ、３１Ｌｕ，３１Ｌｖ，３１Ｌｗ…受電側共振コイル。 DESCRIPTION OF SYMBOLS 10... Non-contact electric power feeding system, 20... Power transmission device, 22... Inverter circuit, 23... Power transmission side filter circuit, 24... Power transmission side resonant circuit, 30... Power receiving device, 30a... Output terminal, 31... Power receiving side resonant circuit, 32... Power receiving side filter circuit, 33... Rectifying circuit, 34... Diode, 24Cu, 24Cv, 24Cw... Power transmitting side resonant capacitor, 24Lu, 24Lv, 24Lw... Power transmitting side resonant coil, 31Cu, 31Cv, 31Cw... Power receiving side resonant capacitor, 31Lu, 31Lv , 31 Lw... Receiving side resonance coil.

Claims (4)

道路側に設けられる送電装置（２０）と車両側に設けられる受電装置（３０）との間で、非接触で給電を行い、車両に設けられる蓄電池を充電する非接触給電システム（１０）において、
前記送電装置は、
直流電源から入力した直流電流を交流電流に変換するインバータ（２２）と、
前記インバータに接続されており、所定の周波数域の交流電流を除去する送電側フィルタ回路（２３）と、
送電側共振コイル（２４Ｌｕ，２４Ｌｖ，２４Ｌｗ）及び前記送電側共振コイルに接続される送電側共振コンデンサ（２４Ｃｕ，２４Ｃｖ，２４Ｃｗ）を有する送電側共振回路（２４）と、を備え、
前記受電装置は、
受電側共振コイル（３１Ｌｕ，３１Ｌｖ，３１Ｌｗ）及び前記受電側共振コイルに接続される受電側共振コンデンサ（３１Ｃｕ，３１Ｃｖ，３１Ｃｗ）を有する受電側共振回路（３１）と、
前記受電側共振回路に接続されており、所定の周波数域の交流電流を除去する受電側フィルタ回路（３２）と、
前記受電側フィルタ回路に接続されており、交流電流を直流電流に整流する整流器（３３）と、
前記整流器に対して直列に接続されており、前記整流器から前記受電装置の出力端子（３０ａ）へ流れる電流を許可するダイオード（３４）と、を備え、
前記送電側フィルタ回路、前記送電側共振回路、前記受電側共振回路及び前記受電側フィルタ回路は、前記送電側フィルタ回路への入力電圧と前記受電側フィルタ回路からの出力電流が比例するように各回路が構成されている非接触給電システム。 In a contactless power supply system (10) for supplying power in a contactless manner between a power transmission device (20) provided on a road side and a power reception device (30) provided on a vehicle side to charge a storage battery provided in the vehicle,
The power transmission device,
An inverter (22) for converting a direct current input from a direct current power source into an alternating current,
A power transmission side filter circuit (23) which is connected to the inverter and removes an alternating current in a predetermined frequency range;
And a power transmission side resonance circuit (24) having a power transmission side resonance coil (24Lu, 24Lv, 24Lw) and a power transmission side resonance capacitor (24Cu, 24Cv, 24Cw) connected to the power transmission side resonance coil,
The power receiving device,
A power receiving side resonance circuit (31) having a power receiving side resonance coil (31Lu, 31Lv, 31Lw) and a power receiving side resonance capacitor (31Cu, 31Cv, 31Cw) connected to the power receiving side resonance coil;
A power receiving side filter circuit (32) which is connected to the power receiving side resonance circuit and removes an alternating current in a predetermined frequency range;
A rectifier (33) that is connected to the power receiving side filter circuit and rectifies an alternating current into a direct current;
A diode (34) that is connected in series to the rectifier and that allows a current to flow from the rectifier to the output terminal (30a) of the power receiving device,
The power transmitting side filter circuit, the power transmitting side resonant circuit, the power receiving side resonant circuit, and the power receiving side filter circuit are arranged such that an input voltage to the power transmitting side filter circuit and an output current from the power receiving side filter circuit are proportional to each other. A contactless power supply system in which the circuit is configured. 前記整流器とグランド端子と間における通電及び通電遮断を切り替えるスイッチ部（３５）と、
前記スイッチ部を制御する制御部（７０）と、を備え、
前記インバータからの出力電圧は、一定であり、
前記制御部は、前記受電装置の出力電流と出力電圧に基づいて充電可能電力を算出し、前記蓄電池の要求電力との比較に基づいて、前記スイッチ部を制御する請求項１に記載の非接触給電システム。 A switch unit (35) for switching between energization and de-energization between the rectifier and the ground terminal,
A control unit (70) for controlling the switch unit,
The output voltage from the inverter is constant,
The non-contact according to claim 1, wherein the control unit calculates chargeable power based on an output current and an output voltage of the power receiving device, and controls the switch unit based on comparison with required power of the storage battery. Power supply system. 前記送電側フィルタ回路及び前記受電側フィルタ回路は、それぞれ入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器であり、
前記送電側共振回路において、前記送電側共振コイルは、前記送電側共振コンデンサが直列接続されている一方、
前記受電側共振回路において、前記受電側共振コイルは、前記受電側共振コンデンサが直列接続されている請求項１又は２に記載の非接触給電システム。 The power transmitting side filter circuit and the power receiving side filter circuit are immittance converters in which the input voltage and the output current are respectively proportional, and the input current and the output voltage are proportional,
In the power transmission side resonance circuit, the power transmission side resonance coil, while the power transmission side resonance capacitor is connected in series,
The contactless power feeding system according to claim 1, wherein, in the power receiving side resonance circuit, the power receiving side resonance coil is connected in series with the power receiving side resonance capacitor. 前記送電側フィルタ回路は、入力電圧と出力電流が比例し、入力電流と出力電圧が比例するイミタンス変換器であり、
前記受電側フィルタ回路は、入力電圧と出力電圧が比例するトランス特性フィルタ回路であり、
前記送電側共振回路において、前記送電側共振コイルは、前記送電側共振コンデンサが直列接続されている一方、
前記受電側共振回路において、前記受電側共振コイルは、前記受電側共振コンデンサが並列接続されている請求項１又は２に記載の非接触給電システム。 The power transmission side filter circuit is an immittance converter in which the input voltage and the output current are proportional, and the input current and the output voltage are proportional,
The power receiving side filter circuit is a transformer characteristic filter circuit in which an input voltage and an output voltage are proportional,
In the power transmission side resonance circuit, the power transmission side resonance coil, while the power transmission side resonance capacitor is connected in series,
The contactless power feeding system according to claim 1, wherein, in the power receiving side resonance circuit, the power receiving side resonance coil is connected in parallel with the power receiving side resonance capacitor.
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