JP2013198260A - Power transmission system - Google Patents

Power transmission system Download PDF

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JP2013198260A
JP2013198260A JP2012062167A JP2012062167A JP2013198260A JP 2013198260 A JP2013198260 A JP 2013198260A JP 2012062167 A JP2012062167 A JP 2012062167A JP 2012062167 A JP2012062167 A JP 2012062167A JP 2013198260 A JP2013198260 A JP 2013198260A
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power
power transmission
rectifier
converter
output voltage
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Takahiko Murayama
隆彦 村山
Yuji Maekawa
祐司 前川
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IHI Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To implement reduction in a cost, quality risk, and size of a system by eliminating conventional necessity for a direct current converter in a subsequent stage of a rectifier on the power reception device side.SOLUTION: A power transmission system comprises: a power transmission device which converts AC power or DC power supplied from a power supply to AC power and performs power transmission through a transmission line; and a power reception device for receiving the AC power through the transmission line. The power transmission device comprises: an AC converter for converting the AC power or DC power supplied from the power supply to the AC power; and a power transmission side control device for controlling the AC converter. The power reception device comprises: a rectifier for rectifying the AC power received through the transmission line to perform conversion to the DC power; and a measurement communication device which measures output voltage and output current of the rectifier and transmits a result of the measurement to the power transmission side control device. The power transmission side control device controls the AC converter so that the output voltage and output current of the rectifier is a desired value, on the basis of the measurement result of the output voltage and output current of the rectifier received from the measurement communication device.

Description

本発明は、電力伝送システムに関する。  The present invention relates to a power transmission system.

従来から非接触給電方式として、電磁誘導方式、電波受信方式、電界結合方式及び磁界共鳴方式等が知られている。これらの方式の内、磁界共鳴方式とは、送電装置側と受電装置側に、コイルとコンデンサからなるＬＣ共振回路を設け、両回路間で磁界を共鳴させてワイヤレスで電力を伝送する技術である（下記特許文献１参照）。
この磁界共鳴方式は、広く実用化されている電磁誘導方式と比べて、弱い磁界で高効率且つ長距離の電力伝送を実現できるという特徴があり、携帯端末や電気自動車等の充電に利用可能な次世代のワイヤレス電力伝送技術として注目されている。 Conventionally, as a non-contact power feeding method, an electromagnetic induction method, a radio wave reception method, an electric field coupling method, a magnetic field resonance method, and the like are known. Among these methods, the magnetic field resonance method is a technology in which an LC resonance circuit composed of a coil and a capacitor is provided on the power transmission device side and the power reception device side, and the power is transmitted wirelessly by resonating the magnetic field between the two circuits. (See Patent Document 1 below).
This magnetic field resonance method has a feature that it can realize high-efficiency and long-distance power transmission with a weak magnetic field, compared to a widely used electromagnetic induction method, and can be used for charging mobile terminals, electric vehicles, etc. It is attracting attention as a next-generation wireless power transmission technology.

特開２０１１−１４７２７１号公報JP 2011-147271 A

非接触給電方式の電力伝送システムは、交流電源から供給される交流電力を空間伝送路を介して無線送電する送電装置と、前記空間伝送路を介して交流電力を無線受電する受電装置とから構成され、前記受電装置は、受電した交流電力を整流して直流電力に変換する整流器と、その整流器から出力される直流電力の直流変換を行う直流変換器（ＤＣ／ＤＣコンバータ）とを備える場合がある。   A non-contact power feeding power transmission system includes a power transmission device that wirelessly transmits AC power supplied from an AC power source via a spatial transmission path, and a power reception device that wirelessly receives AC power via the spatial transmission path. The power receiving apparatus may include a rectifier that rectifies received AC power and converts the received AC power into DC power, and a DC converter (DC / DC converter) that converts DC power output from the rectifier. is there.

従来では、送電装置から受電装置へ送電される交流電力が一定であったため、受電装置側の整流器から出力される直流電力も一定であった。従って、整流器から出力される直流電力をバッテリ等の蓄電器の充電に利用する場合には、上記のように整流器の後段に直流変換器を設けて充電に適した直流電力に変換する必要があり、システムのコスト、品質リスク及びサイズの増大を招く要因となっていた。   Conventionally, since the AC power transmitted from the power transmission device to the power reception device is constant, the DC power output from the rectifier on the power reception device side is also constant. Therefore, when the DC power output from the rectifier is used for charging a battery or other storage device, it is necessary to provide a DC converter at the subsequent stage of the rectifier as described above to convert the DC power to be suitable for charging. It was a factor that caused an increase in system cost, quality risk and size.

本発明は上述した事情に鑑みてなされたものであり、従来必要であった受電装置側における整流器後段の直流変換器を不要とし、システムのコスト、品質リスク及びサイズの低減を実現可能な電力伝送システムを提供することを目的とする。  The present invention has been made in view of the above-described circumstances, and eliminates the need for a DC converter after the rectifier on the power receiving apparatus side, which has been required in the past, and enables power transmission that can realize system cost, quality risk, and size reduction. The purpose is to provide a system.

上記目的を達成するために、本発明では、電力伝送システムに係る第１の解決手段として、電源から供給される交流電力或いは直流電力を交流電力に変換して伝送路を介して送電する送電装置と、前記伝送路を介して前記交流電力を受電する受電装置とを備えた電力伝送システムにおいて、前記送電装置は、前記電源から供給される交流電力或いは直流電力を交流電力に変換する交流変換器と、前記交流変換器を制御する送電側制御装置と、を備え、前記受電装置は、前記伝送路を介して受電した前記交流電力を整流して直流電力に変換する整流器と、前記整流器の出力電圧及び出力電流を測定し、その測定結果を前記送電側制御装置へ送信する測定通信装置と、を備え、前記送電側制御装置は、前記測定通信装置から受信した前記整流器の出力電圧及び出力電流の測定結果に基づいて、前記整流器の出力電圧及び出力電流が所望値となるように前記交流変換器を制御する、という手段を採用する。  In order to achieve the above object, in the present invention, as a first solution means for a power transmission system, a power transmission device that converts AC power or DC power supplied from a power source into AC power and transmits the power via a transmission line. And an AC converter that converts AC power or DC power supplied from the power source into AC power, in a power transmission system comprising: a power receiving device that receives the AC power via the transmission path And a power transmission side control device for controlling the AC converter, wherein the power receiving device rectifies the AC power received via the transmission path and converts it into DC power, and an output of the rectifier A measurement communication device that measures voltage and output current and transmits the measurement result to the power transmission side control device, the power transmission side control device of the rectifier received from the measurement communication device Based on the measurement result of the force voltage and output current, output voltage and output current of the rectifier for controlling the AC converter to a desired value, to adopt a means of.

また、本発明では、電力伝送システムに係る第２の解決手段として、上記第１の解決手段において、前記送電側制御装置は、前記測定通信装置から受信した前記整流器の出力電圧及び出力電流の測定結果に基づいて、前記交流変換器を構成するスイッチング素子のデューティ比を制御することにより、前記整流器の出力電圧及び出力電流を所望値とさせる、という手段を採用する。  In the present invention, as the second solving means relating to the power transmission system, in the first solving means, the power transmission side control device measures the output voltage and output current of the rectifier received from the measurement communication device. Based on the result, a means is adopted in which the output voltage and output current of the rectifier are set to desired values by controlling the duty ratio of the switching elements constituting the AC converter.

また、本発明では、電力伝送システムに係る第３の解決手段として、上記第１または第２の解決手段において、前記送電装置は、前記交流変換器から得られる交流電力を空間伝送路を介して磁界共鳴方式により無線送電するための送電側共鳴コイルを備え、前記受電装置は、前記空間伝送路を介して前記送電側共鳴コイルから前記交流電力を無線受電するための受電側共鳴コイルを備える、という手段を採用する。  Further, in the present invention, as a third solving means relating to the power transmission system, in the first or second solving means, the power transmission device transmits AC power obtained from the AC converter via a spatial transmission path. A power transmission side resonance coil for wirelessly transmitting power by a magnetic field resonance method, and the power reception device includes a power reception side resonance coil for wirelessly receiving the AC power from the power transmission side resonance coil via the spatial transmission path, Adopt the means.

本発明によれば、送電装置側の送電側制御装置が、受電装置側の測定通信装置から受信した前記整流器の出力電圧及び出力電流の測定結果に基づいて、前記整流器の出力電圧及び出力電流が所望値となるように前記交流変換器を制御するので、従来必要であった受電装置側における整流器後段の直流変換器が不要となり、システムのコスト、品質リスク及びサイズの低減を実現することができる。  According to the present invention, based on the measurement result of the output voltage and output current of the rectifier received from the measurement communication device on the power receiving apparatus side, the power transmission side control apparatus on the power transmission apparatus side calculates the output voltage and output current of the rectifier. Since the AC converter is controlled so as to have a desired value, the DC converter after the rectifier on the power receiving apparatus side, which has been necessary in the past, is unnecessary, and the system cost, quality risk, and size can be reduced. .

本実施形態に係る電力伝送システムＡの概略構成図である。It is a schematic block diagram of the electric power transmission system A which concerns on this embodiment. インバータ１１ｂを構成するスイッチング素子のデューティ比を制御して整流器２２の出力電圧を変化させることにより、バッテリ４０の入力電流を制御する一例を示す図である。It is a figure which shows an example which controls the input current of the battery 40 by controlling the duty ratio of the switching element which comprises the inverter 11b, and changing the output voltage of the rectifier 22. FIG.

以下、本発明の一実施形態について、図面を参照しながら説明する。
図１は、本実施形態に係る電力伝送システムＡの概略構成図である。この図に示すように、本実施形態に係る電力伝送システムＡは、例えば駐車場等の所定位置に設置された充電設備１００から電気自動車２００へ充電用電力（交流電力）を空間伝送路３００を介して無線伝送する非接触給電方式の電力伝送システムであり、充電設備１００側に搭載された送電装置１０と、電気自動車２００側に搭載された受電装置２０とから構成されている。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a power transmission system A according to the present embodiment. As shown in this figure, the power transmission system A according to the present embodiment supplies charging power (AC power) from a charging facility 100 installed at a predetermined position such as a parking lot to an electric vehicle 200 through a spatial transmission path 300. It is a non-contact power feeding type power transmission system that wirelessly transmits through the power transmission system 10, and includes a power transmission device 10 mounted on the charging facility 100 side and a power reception device 20 mounted on the electric vehicle 200 side.

送電装置１０は、同じく充電設備１００側に設けられた交流電源３０（例えば単相２００Ｖ、周波数５０或いは６０Ｈｚの商用電源）から供給される交流電力を空間伝送路３００を介して無線送電するものであり、アンプ１１及び送電側共鳴コイル１２を備えている。  The power transmission device 10 wirelessly transmits AC power supplied from an AC power source 30 (for example, a commercial power source having a single phase of 200 V, a frequency of 50 or 60 Hz) provided on the charging facility 100 side via the spatial transmission line 300. Yes, an amplifier 11 and a power transmission resonance coil 12 are provided.

アンプ１１は、交流電源３０から供給される交流電力の交流／交流変換を行い、これによって得られた交流電力を送電側共鳴コイル１２へ出力する交流変換器である。詳細には、このアンプ１１は、交流電源３０から供給される交流電力を直流電力に変換する整流回路１１ａと、この整流回路１１ａから出力される直流電力を所定電圧及び所定周波数を有する交流電力に変換して送電側共鳴コイル１２へ出力するインバータ１１ｂと、このインバータ１１ｂを構成するＭＯＳ−ＦＥＴ等のスイッチング素子をＰＷＭ(Pulse Width Modulation)制御する送電側制御装置１１ｃを備えている。  The amplifier 11 is an AC converter that performs AC / AC conversion of AC power supplied from the AC power supply 30 and outputs the AC power obtained thereby to the power transmission resonance coil 12. Specifically, the amplifier 11 includes a rectifier circuit 11a that converts AC power supplied from the AC power supply 30 into DC power, and DC power output from the rectifier circuit 11a into AC power having a predetermined voltage and a predetermined frequency. The inverter 11b which converts and outputs to the power transmission side resonance coil 12 and the power transmission side control apparatus 11c which performs PWM (Pulse Width Modulation) control of switching elements, such as MOS-FET which comprises this inverter 11b, are provided.

送電側制御装置１１ｃは、上記インバータ１１ｂを構成するスイッチング素子をＰＷＭ制御する（つまり、スイッチング素子のデューティ比を制御する）ことで、上記インバータ１１ｂから出力される交流電力の電圧及び周波数を制御する。また、この送電側制御装置１１ｃは、アンテナ１１ｄを介して、Bluetooth（登録商標）等の近距離無線通信規格を用いて後述の測定通信装置２３と無線通信を行う機能を有している。  The power transmission side control device 11c controls the voltage and frequency of the AC power output from the inverter 11b by PWM-controlling the switching elements constituting the inverter 11b (that is, controlling the duty ratio of the switching elements). . Further, the power transmission side control device 11c has a function of performing wireless communication with a measurement communication device 23 (to be described later) using a short-range wireless communication standard such as Bluetooth (registered trademark) via the antenna 11d.

送電側共鳴コイル１２は、アンプ１１から入力される交流電力を空間伝送路３００を介して磁界共鳴方式により無線送電するための螺旋状に巻かれたヘリカルコイルである。この送電側共鳴コイル１２は、不図示のコンデンサとともにＬＣ共振回路を構成している。なお、ＬＣ共振回路を構成するためのコンデンサとして、ヘリカルコイルの寄生容量を利用しても良いし、或いはコンデンサ素子を別に設けても良い。  The power transmission side resonance coil 12 is a helical coil wound in a spiral shape for wirelessly transmitting AC power input from the amplifier 11 through the spatial transmission path 300 by a magnetic field resonance method. The power transmission resonance coil 12 forms an LC resonance circuit together with a capacitor (not shown). Note that the parasitic capacitance of the helical coil may be used as a capacitor for configuring the LC resonance circuit, or a capacitor element may be provided separately.

受電装置２０は、空間伝送路２００を介して送電装置１０から無線送電された交流電力を無線受電し、その受電した交流電力を充電用の直流電力に変換して電気自動車２００側に搭載された例えばリチウムイオン電池等のバッテリ４０へ供給するものであり、受電側共鳴コイル２１、整流器２２及び測定通信装置２３を備えている。  The power receiving device 20 wirelessly receives AC power wirelessly transmitted from the power transmission device 10 via the space transmission path 200, and converts the received AC power into charging DC power and is mounted on the electric vehicle 200 side. For example, the battery is supplied to a battery 40 such as a lithium ion battery, and includes a power receiving resonance coil 21, a rectifier 22, and a measurement communication device 23.

受電側共鳴コイル２１は、空間伝送路３００を介して送電側共鳴コイル１２から交流電力を無線受電するための螺旋状に巻かれたヘリカルコイルである。この受電側共鳴コイル２１も、不図示のコンデンサとともにＬＣ共振回路を構成している。送電装置１０と受電装置２０の両方のＬＣ共振回路が等しくなるように回路定数を設定すれば、送電側共鳴コイル１２と受電側共鳴コイル２１との間に磁界共鳴を発生させることができる。  The power reception side resonance coil 21 is a helical coil wound in a spiral shape for wirelessly receiving AC power from the power transmission side resonance coil 12 via the spatial transmission path 300. The power receiving resonance coil 21 also forms an LC resonance circuit together with a capacitor (not shown). If circuit constants are set so that both LC resonance circuits of the power transmission device 10 and the power reception device 20 are equal, magnetic field resonance can be generated between the power transmission side resonance coil 12 and the power reception side resonance coil 21.

磁界共鳴が発生すると、アンプ１１から出力される交流電力は送電側共鳴コイル１２によって磁気エネルギーに変換されて無線送電され、その磁気エネルギーは受電側共鳴コイル２１によって交流電力に再変換される。受電側共鳴コイル２１から得られた交流電力は、後段に設けられた整流器２２へ出力される。整流器２２は、受電側共鳴コイル２１から入力される交流電力を整流して直流電力に変換し、その得られた直流電力をバッテリ４０へ出力する。  When magnetic field resonance occurs, AC power output from the amplifier 11 is converted into magnetic energy by the power transmission side resonance coil 12 and wirelessly transmitted, and the magnetic energy is reconverted to AC power by the power reception side resonance coil 21. The AC power obtained from the power receiving resonance coil 21 is output to the rectifier 22 provided at the subsequent stage. The rectifier 22 rectifies the AC power input from the power receiving resonance coil 21 and converts it into DC power, and outputs the obtained DC power to the battery 40.

測定通信装置２３は、整流器２２の出力電圧及び出力電流（つまりバッテリ４０の入力電圧及び入力電流）を測定する機能と、アンテナ２３ａを介して、Bluetooth等の近距離無線通信規格を用いて上記の送電側制御装置１１ｃと無線通信を行う機能とを有している。この測定通信装置２３は、整流器２２の出力電圧及び出力電流を測定し、その測定結果をアンテナ２３ａを介して送電側制御装置１１ｃへ送信する。  The measurement communication device 23 uses the function of measuring the output voltage and output current of the rectifier 22 (that is, the input voltage and input current of the battery 40) and the short-range wireless communication standard such as Bluetooth via the antenna 23a. It has a function of performing wireless communication with the power transmission side control device 11c. The measurement communication device 23 measures the output voltage and output current of the rectifier 22 and transmits the measurement result to the power transmission side control device 11c via the antenna 23a.

詳細は後述するが、送電装置１０の送電側制御装置１１ｃは、受電装置２０の測定通信装置２３から受信した整流器２２の出力電圧及び出力電流の測定結果に基づいて、整流器２２の出力電圧及び出力電流が所望値となるように、言い換えればバッテリ４０の入力電圧及び入力電流が所望値となるようにインバータ１１ｂをＰＷＭ制御する（スイッチング素子のデューティ比を制御する）。  Although details will be described later, the power transmission side control device 11c of the power transmission device 10 outputs the output voltage and output of the rectifier 22 based on the output voltage and output current measurement results of the rectifier 22 received from the measurement communication device 23 of the power reception device 20. The inverter 11b is PWM controlled (the duty ratio of the switching element is controlled) so that the current becomes a desired value, in other words, the input voltage and the input current of the battery 40 become the desired values.

次に、上記のように構成された本実施形態に係る電力伝送システムＡの動作について詳細に説明する。
まず、充電設備１００の設置位置の近くに電気自動車２００が停車すると、送電装置１０の送電側制御装置１１ｃは、無線通信により、受電装置２０の測定通信装置２３に対して整流器２２の出力電圧及び出力電流の測定を要求する。一方、受電装置２０の測定通信装置２３は、送電装置１０の送電側制御装置１１ｃから上記の測定要求を受信すると、現時点での整流器２２の出力電圧及び出力電流を測定し、その測定結果を送電装置１０の送電側制御装置１１ｃへ送信する。 Next, the operation of the power transmission system A according to this embodiment configured as described above will be described in detail.
First, when the electric vehicle 200 stops near the installation position of the charging facility 100, the power transmission side control device 11 c of the power transmission device 10 transmits the output voltage of the rectifier 22 to the measurement communication device 23 of the power reception device 20 by wireless communication. Requires measurement of output current. On the other hand, when the measurement communication device 23 of the power receiving device 20 receives the above measurement request from the power transmission side control device 11c of the power transmission device 10, the measurement communication device 23 measures the output voltage and output current of the rectifier 22 at the present time, and transmits the measurement results. It transmits to the power transmission side control device 11c of the device 10.

なお、この時点では、まだ、送電装置１０から受電装置２０への電力伝送が開始されておらず、バッテリ４０の充電が開始されていないので、整流器２２の出力電圧はバッテリ４０の入力電圧（端子間電圧）と等しくなり、整流器２２の出力電流はゼロ（バッテリ４０の入力電流がゼロ）となる。  At this time, since the power transmission from the power transmitting device 10 to the power receiving device 20 has not started yet and the charging of the battery 40 has not started, the output voltage of the rectifier 22 is the input voltage (terminal) of the battery 40. The output current of the rectifier 22 becomes zero (the input current of the battery 40 is zero).

送電装置１０の送電側制御装置１１ｃは、受電装置２０の測定通信装置２３から整流器２２の出力電圧及び出力電流の測定結果を受信すると、その測定結果に基づいて、送電側共鳴コイル１２と受電側共鳴コイル２１との磁界共鳴に求められるマッチングがとれるインピーダンスの範囲で、整流器２２の出力電圧及び出力電流が所望値（充電に適した値）となるように、言い換えればバッテリ４０の入力電圧及び入力電流が充電に適した値となるようにインバータ１１ｂのＰＷＭ制御を開始する（スイッチング素子のデューティ比を制御する）。  When the power transmission side control device 11c of the power transmission device 10 receives the measurement result of the output voltage and output current of the rectifier 22 from the measurement communication device 23 of the power reception device 20, based on the measurement result, the power transmission side resonance coil 12 and the power reception side The output voltage and output current of the rectifier 22 are set to desired values (values suitable for charging) in an impedance range where matching required for magnetic field resonance with the resonance coil 21 can be obtained, in other words, the input voltage and input of the battery 40. PWM control of the inverter 11b is started so that the current becomes a value suitable for charging (the duty ratio of the switching element is controlled).

これにより、送電装置１０側において、磁界共鳴方式による電力伝送に適し、且つバッテリ４０の充電に適した交流電力がアンプ１１から送電側共鳴コイル１２に出力され、送電側共鳴コイル１２と受電側共鳴コイル２１との間で磁界共鳴が発生する。磁界共鳴が発生すると、アンプ１１から出力された交流電力は送電側共鳴コイル１２から受電側共鳴コイル２１へ伝送（無線送電）される。そして、受電装置２０側において、受電側共鳴コイル２１にて受電された交流電力は、整流器２２によって直流電力に変換されてバッテリ４０に出力される。  As a result, on the power transmission device 10 side, AC power suitable for power transmission by the magnetic field resonance method and suitable for charging the battery 40 is output from the amplifier 11 to the power transmission resonance coil 12, and the power transmission resonance coil 12 and the power reception resonance. Magnetic field resonance occurs with the coil 21. When magnetic field resonance occurs, AC power output from the amplifier 11 is transmitted (wireless power transmission) from the power transmission resonance coil 12 to the power reception resonance coil 21. Then, on the power reception device 20 side, the AC power received by the power reception resonance coil 21 is converted into DC power by the rectifier 22 and output to the battery 40.

ここで、整流器２２の出力電圧及び出力電流は、バッテリ４０の充電に適した値となるので、バッテリ４０の充電が適切に開始される。以降、バッテリ４０の充電が完了するまで、一定の制御周期で、測定通信装置２３は整流器２２の出力電圧及び出力電流の測定結果を送電側制御装置１１ｃへ送信する一方、送電側制御装置１１ｃは、測定通信装置２３から上記の測定結果を受信する度に、その測定結果に基づいて（現在のバッテリ４０の充電状態に応じて）、整流器２２の出力電圧及び出力電流が充電に適した値となるようにインバータ１１ｂのＰＷＭ制御を行う。  Here, since the output voltage and output current of the rectifier 22 have values suitable for charging the battery 40, the charging of the battery 40 is appropriately started. Thereafter, until the charging of the battery 40 is completed, the measurement communication device 23 transmits the measurement result of the output voltage and output current of the rectifier 22 to the power transmission side control device 11c at a constant control cycle, while the power transmission side control device 11c is Each time the measurement result is received from the measurement communication device 23, the output voltage and output current of the rectifier 22 are set to values suitable for charging based on the measurement result (according to the current state of charge of the battery 40). Thus, PWM control of the inverter 11b is performed.

図２は、送電側制御装置１１ｃが、送電側共鳴コイル１２と受電側共鳴コイル２１との磁界共鳴に求められるマッチングがとれるインピーダンスの範囲で、インバータ１１ｂを構成するスイッチング素子のデューティ比を制御して整流器２２の出力電圧を変化させることにより、バッテリ４０の入力電流を制御する一例を示す図である。この図では、スイッチング素子のデューティ比を５０％から６６％に変化させて、バッテリ４０の入力電流を上昇させる場合を例示している。  In FIG. 2, the power transmission side control device 11 c controls the duty ratio of the switching elements constituting the inverter 11 b within the impedance range where matching required for magnetic field resonance between the power transmission side resonance coil 12 and the power reception side resonance coil 21 can be obtained. FIG. 5 is a diagram illustrating an example of controlling the input current of the battery 40 by changing the output voltage of the rectifier 22. In this figure, the case where the duty ratio of the switching element is changed from 50% to 66% to increase the input current of the battery 40 is illustrated.

以上のように、本実施形態によれば、送電装置１０側の送電側制御装置１１ｃが、受電装置２０側の測定通信装置２３から受信した整流器２２の出力電圧及び出力電流（バッテリ４０の入力電圧及び入力電流）の測定結果に基づいて、整流器２２の出力電圧及び出力電流が充電に適した値となるようにアンプ１１（インバータ１１ｂ）を制御するので、従来必要であった受電装置２０側における整流器２２後段の直流変換器が不要となり、システムのコスト、品質リスク及びサイズの低減を実現することができる。  As described above, according to the present embodiment, the power transmission side control device 11c on the power transmission device 10 side receives the output voltage and output current of the rectifier 22 (input voltage of the battery 40) received from the measurement communication device 23 on the power reception device 20 side. And the input current), the amplifier 11 (inverter 11b) is controlled so that the output voltage and output current of the rectifier 22 become values suitable for charging. A DC converter downstream of the rectifier 22 is not required, and system cost, quality risk, and size reduction can be realized.

なお、本発明は上記実施形態に限定されず、以下のような変形例が挙げられる。
（１）上記実施形態では、充電設備１００から電気自動車２００へ充電用電力（交流電力）を空間伝送路３００を介して無線伝送する非接触給電方式の電力伝送システムＡを例示したが、本発明はこれに限定されず、例えば、携帯端末に対し非接触給電方式で電力伝送して、携帯端末のバッテリを充電するような電力伝送システムにも本発明を適用することができる。 In addition, this invention is not limited to the said embodiment, The following modifications are mentioned.
(1) In the above embodiment, the non-contact power feeding type power transmission system A that wirelessly transmits the charging power (AC power) from the charging facility 100 to the electric vehicle 200 via the spatial transmission path 300 is illustrated. However, the present invention is not limited to this. For example, the present invention can be applied to a power transmission system in which power is transmitted to a mobile terminal by a non-contact power feeding method and a battery of the mobile terminal is charged.

（２）上記実施形態では、磁界共鳴方式を利用して送電装置１０と受電装置２０との間で電力伝送を行う場合を例示したが、本発明はこれに限定されず、磁界共鳴方式以外の非接触給電方式（例えば電磁誘導方式など）を利用しても良い。 (2) In the above embodiment, the case where power transmission is performed between the power transmission device 10 and the power reception device 20 using the magnetic field resonance method is illustrated, but the present invention is not limited to this, and other than the magnetic field resonance method. A non-contact power feeding method (for example, an electromagnetic induction method) may be used.

（３）上記実施形態では、送電装置１０と受電装置２０との間で空間伝送路３００を介して交流電力を無線伝送する非接触給電方式の電力伝送システムＡを例示したが、本発明はこれに限定されず、送電装置と受電装置との間で有線伝送路を介して交流電力を有線伝送する電力伝送システムにも本発明を適用することができる。 (3) In the above embodiment, the non-contact power feeding type power transmission system A that wirelessly transmits AC power between the power transmission device 10 and the power reception device 20 via the spatial transmission path 300 is illustrated, but the present invention is not limited to this. However, the present invention can be applied to a power transmission system in which AC power is wired and transmitted between a power transmission device and a power reception device via a wired transmission path.

（４）アンプ１１には必要に応じてＰＦＣを設けても良い。また、上記実施形態では、充電設備１００側に設けられた電源が交流電源３０である場合を例示したが、この電源が直流電源である場合、つまり電源から送電装置１０に直流電力が供給される場合には、アンプ１１から整流回路１１ａを削除すれば良い。 (4) The amplifier 11 may be provided with a PFC as necessary. Moreover, although the case where the power supply provided in the charging equipment 100 side is the alternating current power supply 30 was illustrated in the said embodiment, when this power supply is a DC power supply, that is, DC power is supplied to the power transmission apparatus 10 from a power supply. In this case, the rectifier circuit 11a may be deleted from the amplifier 11.

Ａ…電力伝送システム、１０…送電装置、１１…アンプ（交流変換器）、１１ｃ…送電側制御装置、１２…送電側共鳴コイル、２０…受電装置、２１…受電側共鳴コイル、２２…整流器、２３…測定通信装置、３０…交流電源、４０…バッテリ、１００…充電設備、２００…電気自動車、３００…空間伝送路   DESCRIPTION OF SYMBOLS A ... Electric power transmission system, 10 ... Power transmission apparatus, 11 ... Amplifier (alternating current converter), 11c ... Power transmission side control apparatus, 12 ... Power transmission side resonance coil, 20 ... Power reception apparatus, 21 ... Power reception side resonance coil, 22 ... Rectifier DESCRIPTION OF SYMBOLS 23 ... Measurement communication apparatus, 30 ... AC power supply, 40 ... Battery, 100 ... Charging equipment, 200 ... Electric vehicle, 300 ... Spatial transmission line

Claims (3)

電源から供給される交流電力或いは直流電力を交流電力に変換して伝送路を介して送電する送電装置と、前記伝送路を介して前記交流電力を受電する受電装置とを備えた電力伝送システムにおいて、
前記送電装置は、
前記電源から供給される交流電力或いは直流電力を交流電力に変換する交流変換器と、
前記交流変換器を制御する送電側制御装置と、を備え、
前記受電装置は、
前記伝送路を介して受電した前記交流電力を整流して直流電力に変換する整流器と、
前記整流器の出力電圧及び出力電流を測定し、その測定結果を前記送電側制御装置へ送信する測定通信装置と、を備え、
前記送電側制御装置は、前記測定通信装置から受信した前記整流器の出力電圧及び出力電流の測定結果に基づいて、前記整流器の出力電圧及び出力電流が所望値となるように前記交流変換器を制御することを特徴とする電力伝送システム。 In a power transmission system including a power transmission device that converts AC power or DC power supplied from a power source into AC power and transmits the power via a transmission line, and a power receiving device that receives the AC power via the transmission path. ,
The power transmission device is:
An AC converter that converts AC power or DC power supplied from the power source into AC power;
A power transmission side control device for controlling the AC converter,
The power receiving device is:
A rectifier that rectifies the AC power received via the transmission line and converts the AC power into DC power;
A measurement communication device that measures the output voltage and output current of the rectifier and transmits the measurement result to the power transmission side control device, and
The power transmission side control device controls the AC converter so that the output voltage and output current of the rectifier become desired values based on the measurement result of the output voltage and output current of the rectifier received from the measurement communication device. An electric power transmission system. 前記送電側制御装置は、前記測定通信装置から受信した前記整流器の出力電圧及び出力電流の測定結果に基づいて、前記交流変換器を構成するスイッチング素子のデューティ比を制御することにより、前記整流器の出力電圧及び出力電流を所望値とさせることを特徴とする請求項１に記載の電力伝送システム。   The power transmission side control device controls the duty ratio of the switching element constituting the AC converter based on the measurement result of the output voltage and output current of the rectifier received from the measurement communication device, thereby The power transmission system according to claim 1, wherein the output voltage and the output current are set to desired values. 前記送電装置は、前記交流変換器から得られる交流電力を空間伝送路を介して磁界共鳴方式により無線送電するための送電側共鳴コイルを備え、
前記受電装置は、前記空間伝送路を介して前記送電側共鳴コイルから前記交流電力を無線受電するための受電側共鳴コイルを備えることを特徴とする請求項１または２に記載の電力伝送システム。 The power transmission device includes a power transmission side resonance coil for wirelessly transmitting AC power obtained from the AC converter by a magnetic field resonance method through a spatial transmission path,
3. The power transmission system according to claim 1, wherein the power reception device includes a power reception side resonance coil for wirelessly receiving the AC power from the power transmission side resonance coil via the spatial transmission path.
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