JP3778874B2 - Non-contact power feeding device - Google Patents

Non-contact power feeding device Download PDF

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Publication number
JP3778874B2
JP3778874B2 JP2002132760A JP2002132760A JP3778874B2 JP 3778874 B2 JP3778874 B2 JP 3778874B2 JP 2002132760 A JP2002132760 A JP 2002132760A JP 2002132760 A JP2002132760 A JP 2002132760A JP 3778874 B2 JP3778874 B2 JP 3778874B2
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optical communication
power supply
moving body
mobile device
fixing device
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JP2003045732A (en
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眞 植平
文男 畑田
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Tsubakimoto Chain Co
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Tsubakimoto Chain Co
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Priority to KR10-2002-0027164A priority patent/KR100458691B1/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
    • 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

Description

【０００１】
【発明の属する技術分野】
本発明は、移動体が必要とする電力を非接触で供給し、移動体を制御するための信号を非接触で送受信する非接触給電装置に関する。
【０００２】
【従来の技術】
物品の搬送、又は物品の位置決め等の作業において、一軸方向への直線運動を行う移動体を備えた移動体システムが広く用いられている。移動体を駆動するための電力を移動体へ供給し、移動体を制御するための制御信号などの信号を送受信するための方法として、ケーブルを移動体に接続しておく方法、又は、移動体の移動経路に伝送線を配設し、移動体に備えた集電子を伝送線に接触させて電力および信号を伝送する方法が知られている。
【０００３】
ケーブルを用いる方法においては、移動体がケーブルを引きずるために、騒音および塵が発生するという問題があった。また、ケーブルが移動するための多大なスペースを必要とするという問題があった。さらに、ケーブルは移動体に引きずられて湾曲を繰り返すために、断線などの損傷をおこして寿命が短いという問題があった。
【０００４】
伝送線と集電子とを用いる方法においては、伝送線と集電子とが接触して摺動するために共に摩耗して寿命が短いという問題があり、また摩耗により塵が発生するという問題があった。また、伝送線と集電子との接触状態が安定せず、信号の伝送が不安定で、移動体を正確に制御できないという問題があった。
【０００５】
以上の如き問題を解決するために、電力および信号を非接触で移動体へ伝送する装置が開発されている。電力を非接触で伝送する装置としては、移動体の移動経路に交流電流が流れる給電線を設置し、コイルを用いて構成されたピックアップを給電線に非接触で近接させて移動体に備え、給電線に流れる交流電流によりピックアップに発生する誘導起電力を電力として移動体へ供給する非接触給電装置が従来より知られている。
【０００６】
特開平９−２８４９０７号公報においては、移動体の移動経路に二組の給電線を備え、一台の移動体に二台のピックアップを備えて二組の非接触給電装置を設け、一方の非接触給電装置を電力供給用に、他方の非接触給電装置を信号伝送用に用いる非接触伝送装置が開示されている。また、特開２０００−１３５６９４号公報においては、移動体に非接触給電装置のピックアップと光通信移動機とを備え、移動体の位置を検出して位置信号を送信する光通信固定機を給電線に沿って設置し、非接触給電装置を用いて移動体へ電力を供給し、移動体の移動経路に交差する光路を用いた光通信で光通信固定機から光通信移動機へ位置信号を送信し、移動体は受信した位置信号に従って自ら位置の制御を行う装置が開示されている。
【０００７】
特開平９−２８４９０７号公報および特開２０００−１３５６９４号公報に開示された装置を用いることにより、騒音および塵の発生が少なく、多大なスペースを必要とせず、寿命が長くて、更に移動体を正確に制御することができる移動体システムを実現することができる。
【０００８】
【発明が解決しようとする課題】
特開平９−２８４９０７号公報に開示された装置においては、一台の移動体に二台のピックアップを備え、給電線が二組必要であるため、移動体および非接触給電装置が大型化するという問題がある。特開２０００−１３５６９４号公報に開示された装置においては、移動体の位置を検出して位置信号を送信する光通信固定機を給電線に沿って多数設置する必要があるため、コストが上昇するという問題があり、また、光通信が外乱光の影響を受け易いという問題がある。更に、特開平９−２８４９０７号公報および特開２０００−１３５６９４号公報に開示された装置は、共に、給電線が剥き出しになっているために、非接触給電装置および移動体を構成する機器、又は外部の機器が、給電線から発生する電磁波により、ノイズの受信または誤作動などの電磁的な影響を受け、安全性が低いという問題がある。
【０００９】
本発明は、斯かる事情に鑑みてなされたものであって、その目的とするところは、給電線とピックアップとを用いて移動体に電力を供給し、移動体の経路に沿った光路で光通信を行う光通信機を用いて移動体に信号を伝送することにより、装置を大型化させず、コストの上昇を抑制することができる非接触給電装置を提供することにある。
【００１０】
また、本発明の他の目的とするところは、光通信機を含む給電線全体を覆って外から遮断する導電材製のカバーを備えることにより、光通信が外乱光の影響を受けずに信号の伝送が安定し、また電磁的な影響を外部に及ぼさずに移動体を安全に運用することができる非接触給電装置を提供することにある。
【００１１】
【課題を解決するための手段】
本発明に係る非接触給電装置は、交流電流が流れる給電線と、該給電線に沿って直線運動を行う他の装置に設けられ、前記給電線に近接して誘導起電力を発生させるピックアップを用いて前記装置へ前記誘導起電力を供給する受電部とを備える非接触給電装置において、光通信固定機と、前記受電部に設けられ、前記光通信固定機との間で光通信を行う光通信移動機と、前記給電線を囲繞する導電材製のカバーとを備え、前記光通信固定機及び前記光通信移動機は、前記給電線に沿った光路を用いて光通信を行うように、距離を隔てて相対してあり、前記光通信固定機及び前記光通信移動機は、前記カバーの内側に配置されていることを特徴とする。
【００１４】
本発明に係る非接触給電装置は、前記光通信固定機及び前記光通信移動機は、それぞれ導電材製のシールドにて覆われていることを特徴とする。
【００１６】
本発明に係る非接触給電装置は、前記ピックアップは、前記給電線に面している部分に摩擦緩和材を備えることを特徴とする。
【００１７】
本発明においては、ピックアップを有する受電部を移動体に備えて電力を供給し、光通信固定機と受電部に設けた光通信移動機とを備えて移動体の経路に沿った光路を利用して移動体を制御する制御信号などの信号を送受信することにより、必要な光通信固定機と移動体に備える受電部が有するピックアップと給電線との数を減らし、非接触給電装置を小型化してコストの上昇を抑制することができる。
【００１８】
本発明においては、交流電流が流れる給電線を囲繞する導電材製のカバーを備えたため、給電線から発生する電磁波をカバーが封じ込め、前記電磁波により外部の機器がノイズの受信または誤作動などの電磁的な影響を被ることを防止し、移動体を安全に運用することができる。
【００１９】
本発明においては、前記カバーの内側に光通信固定機および光通信移動機を配置したため、光通信固定機と光通信移動機との間の光通信に用いられる光路への遮断物の侵入、または外乱光の侵入を前記カバーが防止し、更に光通信の光の散乱を抑制して、光通信を用いた信号の伝送が安定する。
【００２０】
本発明においては、光通信固定機および光通信移動機を、個別に導電材製のシールドで覆う構成としたため、ノイズの受信または誤作動などの給電線が発生する電磁波による影響を遮断し、信号の伝送を安定化することができる。
【００２１】
本発明においては、給電線に沿って導光体を設置し、該導光体を介して光通信を行うことにより、光通信固定機および光通信移動機の間の光軸合わせが容易になり、また、光通信に用いる光路が移動体により遮断されないため、一台の光通信固定機で複数の移動体へ信号を伝送することができる。
【００２２】
本発明においては、ピックアップの給電線に面している部分に摩擦緩和材を備えることにより、ピックアップが給電線に接触した場合の摩耗または損傷を少なくすることができる。
【００２３】
【発明の実施の形態】
以下、本発明をその実施の形態を示す図面に基づき具体的に説明する。
（実施の形態１）
図１は、本発明の非接触給電装置の外観を示す斜視図である。本発明の非接触給電装置は、ループ状に設けられ、交流電源５が接続されて１ｋＨｚ以上の高周波交流電流が流れる給電線３と、給電線３に沿って移動する移動体に設けられる受電部１とを用いて構成されており、受電部１は、給電線３に近接して誘導起電力を発生させるピックアップ１２を備えている。また、光通信により信号の送受信を行う光通信固定機２が給電線３に対して固定されており、光通信固定機２との間で光通信を行う光通信移動機１１が受電部１に備えられている。なお、光通信固定機２は、ボルト等の固定具で固定されている必要はなく、給電線３に対して移動せずに載置されていても良い。更に、給電線３、光通信固定機２、光通信移動機１１及びピックアップ１２を囲う、金属などの導電材にて形成されたカバー４が備えられ、カバー４は、給電線３の設置面を形成する設置面部４１と設置面以外の部分を囲繞する囲繞部４２とから構成されている。図２は本発明の非接触給電装置、及び受電部１を備えた移動体の構成を示すブロック図であり、図中の１０は移動体である。移動体１０は、受電部１を備え、受電部１から走行用モータ等の負荷１３へ電力を供給されて給電線３に沿って直線運動を行い、物品の移動または位置決め等の作業を行う。
【００２４】
図３は、ピックアップ１２を示す斜視図である。ピックアップ１２は、磁性材製のコア１２ａと、コア１２ａに巻回されたコイル１２ｂとを用いて構成されている。コア１２ａは、往復する給電線３が貫通する二本の孔を設けた直方体形状に形成され、二本の孔の間の部分にコイル１２ｂが巻回されている。コア１２ａは、例えば、正面視でＥ字形状の磁性部材を上下に組み立てて構成される。コイル１２ｂの両端は、移動体１０の負荷１３及び光通信移動機１１に接続されている。給電線３に流れる交流電流により、給電線３の周囲には時間的に変化する磁界が発生し、発生した磁界がコイル１２ｂに鎖交して誘導起電力がコイル１２ｂに発生し、発生した誘導起電力が負荷１３及び光通信移動機１１に電力として供給される。なお、正面視でＥ字型、Ｃ字型、Ｈ字型、及びロの字型の形状など、コア１２ａの形状は他の形状であっても良い。また、コイル１２ｂを巻回する位置は、他の位置であっても良く、複数の位置に巻回しても良い。
【００２５】
光通信固定機２は、移動体１０の移動経路の端に設置されており、光通信固定機２及び光通信移動機１１は、光通信に用いる光路を給電線３に沿って構成され、距離を隔てて相対している。光通信固定機２には、図示しない制御装置などの信号入出力装置が接続されており、該信号入出力装置から移動体１０の制御信号などの信号を入力され、該信号を光通信で光通信移動機１１へ送信する。光通信移動機１１は、信号を光通信固定機２から受信して負荷１３へ入力し、フィードバック信号などの負荷１３からの信号を光通信固定機２へ送信する。図２に、信号の経路を矢印で示す。以上の如くにして移動体１０への信号の伝送が行われ、移動体１０の位置決め等の作業を制御することができる。信号の伝送に用いる手段として、送信側と受信側との二台の光通信機のみを用いるため、装置が小型化し、コストの上昇を抑制することができる。また、信号の伝送媒体が光であるため、給電線３に流れる交流電流による電磁的な影響を受けにくく、信号の伝送が安定化する。
【００２６】
図４は、光通信移動機１１を示す斜視図である。図中１１ａは送受光部であり、光通信の光が入出力する。光通信移動機１１は、送受光部１１ａを除いて金属などの導電材製のシールド１１ｂにて覆われている。シールド１１ｂにより、給電線３が発生する電磁波が遮断され、ノイズの受信または誤作動などの電磁波による影響を防止することができ、光通信移動機１１は安定して信号を伝送することができる。光通信固定機２も同様に構成されており、送受光部を除いてシールドにて覆われている。
【００２７】
カバー４は、受電部１が移動体１０へ連結するためのすき間を囲繞部４２に残して給電線３を囲繞しており、カバー４の内側には、更に、光通信固定機２及び光通信移動機１１が位置している。カバー４で給電線３を囲むことにより、給電線３が発生する電磁波を封じ込め、ノイズの混入または誤作動などの外部の機器への電磁波による影響を防止することが可能となり、移動体１０を安全に運用することができる。また、カバー４は、光通信固定機２及び光通信移動機１１の間で送受信される光通信の光を遮蔽する遮蔽物または外乱光の侵入を遮断するため、光通信による信号の伝送を安定化することができる。更に、カバー４の内面に金属の地肌を露出させた場合には、内面が光通信の光を反射し、光通信の光が散乱または吸収によって強度を弱めることを防止するため、光通信による信号の伝送をより安定化することができる。または、光通信固定機２及び光通信移動機１１の出力を抑えて装置をより小型化することができる。
【００２８】
以上詳述した如く、本実施の形態にあっては、非接触給電装置を用いて移動体１０へ電力を供給するために、低騒音で長寿命となり、非接触給電装置の給電線３に沿った光路で光通信を行って信号を伝送するために、装置が小型化し、光通信固定機２及び光通信移動機１１の夫々を導電材製のシールドで覆うために、電磁波の影響を遮断して信号の伝送が安定化し、給電線３、光通信固定機２及び光通信移動機１１を囲繞する導電材製のカバー４を備えたために、給電線３が発生する電磁波による外部の機器への電磁的な影響を防止し、また外乱光または遮蔽物による影響を排除して光通信による信号の伝送を安定化する。これにより、安全、小型、低価格、長寿命であり、高精度で移動体の動作を制御できる非接触給電装置を実現することができる。
【００２９】
本実施の形態においては、給電線３は、ループ状に設けられる形態を示したが、この形態に限るものではなく、ループを複数回重ねて給電線３を構成する形態としてもよい。また、交流電源５は、カバー４の外側に設けられる形態を示したが、カバー４の内側に設けられる形態としてもよい。
【００３０】
（実施の形態２）
図５は、本発明の非接触給電装置、及び該非接触給電装置を用いて電力を供給される移動体の実施の形態２の構成を示すブロック図である。図中の６は、光通信の光を導く長尺の導光体であり、本実施の形態においては、導光体６を用いて光通信固定機２と光通信移動機１１との間の光通信を行う。導光体６は、長手方向を給電線３に略平行にして設置されており、移動体１０は、導光体６の脇を移動する構成となっている。導光体６は、光通信に用いられる光を内部に通過させ、内部を通過する光を所定の位置にて長手方向に対して略垂直方向へ放出する構成となっており、光通信固定機２は導光体６の端部に設置され、受電部１に備えられた光通信移動機１１は、送受光部１１ａを導光体６へ対向させた配置となっている。本実施の形態に係る非接触給電装置および移動体１０のその他の構成は、実施の形態１と同様であり、対応する部分に同符号を付してその説明を省略する。
【００３１】
図６は、導光体６の形態の例を示す模式図であり、図中の矢印は光の経路を示す。導光体６は、ガラス又は合成樹脂などの透光材にて形成されており、例えば外壁に光反射剤を塗布するなどして、内部で光が反射しながら伝播する構成とし、例えば所定の位置にて光反射剤を除去するなどして、光通信移動機１１に対向する側の所定の位置にて光を放出する光放出部６１を設けている。光通信固定機２から送信された信号は、導光体６の内部を通って伝送され、光放出部６１から放出されて光通信移動機１１に受信される。導光体６の形態は、本実施の形態の例に限るものではなく、内部に光を通して長手方向に伝播させ、所定の位置にて光を放出する構成であれば、どのような形態であってもよい。また、導光体６は、給電線３に付設される構成としてもよく、カバー４の内面に備えられる構成としてもよい。
【００３２】
本実施の形態においては、長尺の導光体６を給電線３に略平行に設置し、導光体６を介して光通信固定機２と光通信移動機１１との光通信を行う構成としたため、光通信固定機２と光通信移動機１１との間の光軸合わせが容易になり、コストを抑制することができる。また、移動体１０の移動経路の脇に設置された導光体６を用いて光通信を行うため、一台の光通信固定機２で複数の移動体１０，１０，…の受電部１，１，…に備えられた夫々の光通信移動機１１，１１，…との通信を行うことができる。
【００３３】
（実施の形態３）
図７は、本発明の非接触給電装置の実施の形態３に係る、ピックアップを示す斜視図である。本実施の形態においては、ピックアップ１２の給電線３に面している部分に摩擦緩和材１２ｃを備えて、本発明の非接触給電装置を構成している。ピックアップ１２は、給電線３が貫通する二本の孔を設けた磁性材製のコア１２ａと、コア１２ａの二本の孔の間の部分に巻回されたコイル１２ｂと、二本の孔の内面に備えられた摩擦緩和材１２ｃ，１２ｃとを用いて構成されている。コイル１２ｂの両端は、図示しない移動体の負荷及び光通信移動機に接続されている。摩擦緩和材１２ｃは、フッ素樹脂などの低摩擦の素材を用い、コア１２ａの内面に嵌合する管の形状に形成され、管の内側に給電線３を位置させてコイル１２ｂを巻回させたコア１２ａの内面に嵌合している。本実施の形態に係る非接触給電装置のその他の構成は、実施の形態１と同様であり、その説明を省略する。
【００３４】
本実施の形態においては、ピックアップ１２の給電線３に面している部分に、低摩擦性の摩擦緩和材１２ｃを備えたため、ピックアップ１２が給電線３に接触した場合でも、非接触給電装置を用いて電力を供給される移動体の移動を滑らかにし、また、ピックアップ１２及び給電線３の摩耗および損傷を軽減して装置の寿命を長くすることができる。
【００３５】
【発明の効果】
本発明においては、ピックアップを有する受電部を移動体に備えて電力を供給し、光通信固定機と受電部に設けた光通信移動機とを備えて移動体の経路に沿った光路を利用して移動体を制御する制御信号などの信号を送受信することにより、非接触で電力および信号を移動体に伝送することができる低騒音で高寿命な非接触給電装置を実現するとともに、装置が大型化せずにコストの上昇を抑制することができる。
【００３６】
本発明においては、給電線を囲繞する導電材製のカバーを備えたため、カバーが給電線から発生する電磁波を封じ込めて、ノイズの混入または誤作動などの電磁的な影響を外部の機器へ及ぼすことがない、安全な非接触給電装置を実現することができる。
【００３７】
本発明においては、前記カバーの内側に光通信固定機および光通信移動機を配置したため、光通信が遮蔽物または外乱光によって影響を受けずに信号の伝送が安定する。また、カバーの内面が光を反射する構成とした場合には、光通信に用いる光が反射して光通信による信号の伝送がより安定し、または、光通信固定機および光通信移動機の出力を抑えて装置をより小型化することができる。
【００３８】
本発明においては、光通信固定機および光通信移動機を、個別に導電材製のシールドで覆う構成としたため、ノイズの受信または誤作動などの給電線が発生する電磁波による影響を遮断し、信号の伝送を安定化することができる。
【００３９】
本発明においては、給電線に沿って導光体を設置し、該導光体を介して光通信を行うことにより、光通信固定機および光通信移動機の光軸合わせが容易になってコストの上昇を抑制し、また、一台の光通信固定機で複数の光通信移動機へ信号を伝送することができる。
【００４０】
本発明においては、給電線に近接しているピックアップの給電線に面した部分に摩擦緩和材を備えることにより、ピックアップが給電線に接触した場合の摩耗または損傷を軽減することができる等、本発明は優れた効果を奏する。
【図面の簡単な説明】
【図１】本発明の非接触給電装置の外観を示す斜視図である。
【図２】本発明の非接触給電装置、及び受電部を備えた移動体の構成を示すブロック図である。
【図３】ピックアップを示す斜視図である。
【図４】光通信移動機を示す斜視図である。
【図５】本発明の非接触給電装置、及び該非接触給電装置を用いて電力を供給される移動体の実施の形態２の構成を示すブロック図である。
【図６】導光体の形態の例を示す模式図である。
【図７】本発明の非接触給電装置の実施の形態３に係る、ピックアップを示す斜視図である。
【符号の説明】
１ 受電部
１０ 移動体
１１ 光通信移動機
１１ｂ シールド
１２ ピックアップ
１２ｃ 摩擦緩和材
２ 光通信固定機
３ 給電線
４ カバー
５ 交流電源
６ 導光体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact power feeding device that supplies electric power required by a moving body in a non-contact manner and transmits and receives signals for controlling the moving body in a non-contact manner.
[0002]
[Prior art]
2. Description of the Related Art A moving body system including a moving body that performs linear motion in a uniaxial direction is widely used in operations such as article conveyance or article positioning. As a method for supplying electric power for driving the moving body to the moving body and transmitting / receiving signals such as control signals for controlling the moving body, a method of connecting a cable to the moving body, or a moving body There is known a method of transmitting power and a signal by arranging a transmission line on the movement path of the movable body and bringing a current collector provided in the moving body into contact with the transmission line.
[0003]
The method using the cable has a problem that noise and dust are generated because the moving body drags the cable. In addition, there is a problem that a large space is required for the cable to move. Furthermore, since the cable is repeatedly dragged by the moving body and repeatedly bends, there is a problem that the cable is damaged such as disconnection and the life is short.
[0004]
In the method using the transmission line and the current collector, there is a problem that the transmission line and the current collector are in contact with each other and slide, so that both wear and the life is short, and there is a problem that dust is generated due to the wear. It was. Further, there is a problem that the contact state between the transmission line and the current collector is not stable, signal transmission is unstable, and the moving body cannot be controlled accurately.
[0005]
In order to solve the above problems, an apparatus for transmitting electric power and signals to a mobile body in a contactless manner has been developed. As a device for transmitting electric power in a non-contact manner, a power feeding line through which an alternating current flows is installed in the moving path of the moving body, and a pickup configured using a coil is brought close to the power feeding line in a non-contacting manner and is provided in the moving body. 2. Description of the Related Art Conventionally, a non-contact power feeding apparatus that supplies an induced electromotive force generated in a pickup by an alternating current flowing through a power supply line to a moving body as power is known.
[0006]
In Japanese Patent Laid-Open No. 9-284907, two sets of power supply lines are provided on the moving path of the moving body, two pickups are provided on one moving body, two sets of non-contact power supply devices are provided, A non-contact transmission device that uses a contact power supply device for power supply and the other non-contact power supply device for signal transmission is disclosed. In Japanese Patent Laid-Open No. 2000-135694, an optical communication fixed device that includes a pickup of a non-contact power supply device and an optical communication mobile device on a moving body and detects a position of the moving body and transmits a position signal is used as a power supply line. , Along with the non-contact power supply device to supply power to the mobile body, and transmit the position signal from the optical communication fixed device to the optical communication mobile device by optical communication using the optical path crossing the moving path of the mobile body However, a device is disclosed in which the mobile body controls its position according to the received position signal.
[0007]
By using the devices disclosed in JP-A-9-284907 and JP-A-2000-135694, there is little generation of noise and dust, no large space is required, the life is long, and the moving body is further A mobile system that can be accurately controlled can be realized.
[0008]
[Problems to be solved by the invention]
In the apparatus disclosed in Japanese Patent Application Laid-Open No. 9-284907, two pickups are provided in one moving body, and two sets of power supply lines are required, so that the moving body and the non-contact power supply apparatus are increased in size. There's a problem. In the apparatus disclosed in Japanese Patent Application Laid-Open No. 2000-135694, it is necessary to install a large number of optical communication fixing machines that detect the position of the moving body and transmit a position signal along the power supply line, which increases costs. In addition, there is a problem that optical communication is easily affected by disturbance light. Furthermore, since the devices disclosed in Japanese Patent Laid-Open Nos. 9-284907 and 2000-135694 are both exposed to the power supply line, the non-contact power supply device and the device constituting the moving body, or There is a problem that an external device is affected by electromagnetic waves such as reception of noise or malfunction due to electromagnetic waves generated from a power supply line, and safety is low.
[0009]
The present invention has been made in view of such circumstances, and an object of the present invention is to supply power to a moving body using a feeder line and a pickup, and to transmit light on an optical path along the path of the moving body. An object of the present invention is to provide a non-contact power feeding device that can suppress an increase in cost without increasing the size of the device by transmitting a signal to a moving body using an optical communication device that performs communication.
[0010]
In addition, another object of the present invention is to provide a cover made of a conductive material that covers the entire power supply line including the optical communication device and shields it from the outside, so that optical communication can be performed without being affected by disturbance light. It is an object of the present invention to provide a non-contact power feeding apparatus that can stably operate a moving body without causing an electromagnetic influence to the outside.
[0011]
[Means for Solving the Problems]
A non-contact power feeding device according to the present invention includes a pickup that generates an induced electromotive force in the vicinity of the power supply line and a power supply line through which an alternating current flows, and another device that performs linear motion along the power supply line. A non-contact power feeding device including a power receiving unit that supplies the induced electromotive force to the device using light that is provided in the optical communication fixing device and the power receiving unit and performs optical communication with the optical communication fixing device. A communication mobile device and a cover made of a conductive material surrounding the power supply line, and the optical communication fixing device and the optical communication mobile device perform optical communication using an optical path along the power supply line, The optical communication fixing device and the optical communication mobile device are arranged inside the cover .
[0014]
The contactless power feeding device according to the present invention is characterized in that the optical communication fixing device and the optical communication mobile device are each covered with a shield made of a conductive material.
[0016]
The contactless power supply device according to the present invention is characterized in that the pickup includes a friction relaxation material in a portion facing the power supply line.
[0017]
In the present invention, a power receiving unit having a pickup is provided in the mobile body to supply power, and an optical path along the path of the mobile body is provided with an optical communication fixing device and an optical communication mobile device provided in the power receiving unit. By transmitting and receiving signals such as control signals that control the mobile body, the number of pickups and power supply lines of the required optical communication fixing machine and the power receiving unit provided in the mobile body is reduced, and the non-contact power supply device is downsized. An increase in cost can be suppressed.
[0018]
In the present invention, since the cover made of a conductive material surrounding the power supply line through which the alternating current flows is provided, the cover encloses the electromagnetic wave generated from the power supply line, and the external device causes electromagnetic waves such as noise reception or malfunction by the electromagnetic wave. It is possible to prevent the mobile body from being affected and to operate the mobile body safely.
[0019]
In the present invention, the optical communication fixing device and the optical communication mobile device are arranged inside the cover, so that an obstruction enters the optical path used for optical communication between the optical communication fixing device and the optical communication mobile device, or The cover prevents disturbance light from entering, further suppresses scattering of light in optical communication, and stabilizes signal transmission using optical communication.
[0020]
In the present invention, since the optical communication fixing device and the optical communication mobile device are individually configured to be covered with a shield made of a conductive material, the influence of electromagnetic waves generated by the power supply line such as reception of noise or malfunction is blocked, and the signal Transmission can be stabilized.
[0021]
In the present invention, it is easy to align the optical axis between the optical communication fixing device and the optical communication mobile device by installing a light guide along the feeder and performing optical communication through the light guide. In addition, since the optical path used for optical communication is not blocked by the moving body, a signal can be transmitted to a plurality of moving bodies with a single optical communication fixing machine.
[0022]
In the present invention, wear or damage when the pickup comes into contact with the power supply line can be reduced by providing the friction relaxation material in the portion facing the power supply line of the pickup.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.
(Embodiment 1)
FIG. 1 is a perspective view showing an appearance of a non-contact power feeding device according to the present invention. The non-contact power supply device of the present invention is provided in a loop shape, and is connected to an AC power supply 5 and a high-frequency AC current of 1 kHz or more flows, and a power receiving unit provided in a moving body that moves along the power supply line 3 The power receiving unit 1 includes a pickup 12 that generates an induced electromotive force in the vicinity of the feeder line 3. In addition, an optical communication fixed device 2 that transmits and receives signals by optical communication is fixed to the feeder 3, and an optical communication mobile device 11 that performs optical communication with the optical communication fixed device 2 is connected to the power receiving unit 1. Is provided. The optical communication fixing device 2 does not need to be fixed with a fixing tool such as a bolt, and may be placed without moving with respect to the feeder 3. Further, a cover 4 formed of a conductive material such as metal is provided to enclose the power supply line 3, the optical communication fixing device 2, the optical communication mobile device 11 and the pickup 12, and the cover 4 covers the installation surface of the power supply line 3. It is comprised from the installation surface part 41 to form and the surrounding part 42 which surrounds parts other than an installation surface. FIG. 2 is a block diagram illustrating a configuration of a moving body including the non-contact power feeding device and the power receiving unit 1 according to the present invention, and reference numeral 10 in the figure denotes the moving body. The moving body 10 includes a power receiving unit 1 and is supplied with electric power from the power receiving unit 1 to a load 13 such as a traveling motor and performs a linear motion along the power supply line 3 to perform work such as movement or positioning of an article.
[0024]
FIG. 3 is a perspective view showing the pickup 12. The pickup 12 includes a magnetic material core 12a and a coil 12b wound around the core 12a. The core 12a is formed in a rectangular parallelepiped shape having two holes through which the reciprocating feed line 3 passes, and a coil 12b is wound around a portion between the two holes. The core 12a is configured by, for example, assembling an E-shaped magnetic member vertically when viewed from the front. Both ends of the coil 12 b are connected to the load 13 of the moving body 10 and the optical communication mobile device 11. Due to the alternating current flowing through the feed line 3, a magnetic field that changes with time is generated around the feed line 3, the generated magnetic field is linked to the coil 12b, and an induced electromotive force is generated in the coil 12b. The electromotive force is supplied to the load 13 and the optical communication mobile device 11 as electric power. Note that the shape of the core 12a may be other shapes such as an E shape, a C shape, an H shape, and a square shape in front view. Moreover, the position which winds the coil 12b may be another position, and may be wound at a plurality of positions.
[0025]
The optical communication fixing device 2 is installed at the end of the moving path of the moving body 10, and the optical communication fixing device 2 and the optical communication mobile device 11 are configured such that the optical path used for optical communication is configured along the feeder line 3. Are opposed to each other. A signal input / output device such as a control device (not shown) is connected to the optical communication fixing machine 2, and a signal such as a control signal of the moving body 10 is input from the signal input / output device. Transmit to the communication mobile device 11. The optical communication mobile device 11 receives a signal from the optical communication fixed device 2 and inputs it to the load 13, and transmits a signal from the load 13 such as a feedback signal to the optical communication fixed device 2. In FIG. 2, the signal path is indicated by arrows. As described above, signals are transmitted to the moving body 10, and operations such as positioning of the moving body 10 can be controlled. Since only two optical communication devices, i.e., the transmission side and the reception side, are used as means for signal transmission, the apparatus can be miniaturized and an increase in cost can be suppressed. Further, since the signal transmission medium is light, it is less susceptible to electromagnetic influences due to the alternating current flowing in the feeder line 3, and signal transmission is stabilized.
[0026]
FIG. 4 is a perspective view showing the optical communication mobile device 11. In the figure, reference numeral 11a denotes a light transmission / reception unit which inputs and outputs light for optical communication. The optical communication mobile device 11 is covered with a shield 11b made of a conductive material such as metal except for the light transmitting / receiving unit 11a. The shield 11b blocks the electromagnetic wave generated by the feeder 3 and can prevent the influence of electromagnetic waves such as reception of noise or malfunction, and the optical communication mobile device 11 can transmit signals stably. The optical communication fixing device 2 is configured in the same manner, and is covered with a shield except for the light transmitting / receiving unit.
[0027]
The cover 4 surrounds the power supply line 3 while leaving a gap for connecting the power receiving unit 1 to the moving body 10 in the surrounding unit 42, and the optical communication fixing machine 2 and the optical communication are further provided inside the cover 4. The mobile device 11 is located. By enclosing the power supply line 3 with the cover 4, it is possible to contain the electromagnetic wave generated by the power supply line 3, and to prevent the influence of the electromagnetic wave on external equipment such as noise mixing or malfunction, and thus the mobile body 10 can be made safe. Can be operated. In addition, the cover 4 stabilizes transmission of signals by optical communication in order to block intrusion of shielding light or disturbance light that blocks light of optical communication transmitted and received between the optical communication fixing device 2 and the optical communication mobile device 11. Can be Further, when the metal background is exposed on the inner surface of the cover 4, the inner surface reflects the light of optical communication, and the optical communication signal is prevented from being weakened by scattering or absorption. Transmission can be further stabilized. Alternatively, the output of the optical communication fixing device 2 and the optical communication mobile device 11 can be suppressed and the apparatus can be further downsized.
[0028]
As described above in detail, in the present embodiment, since power is supplied to the moving body 10 using the non-contact power supply device, the life is low and the service life is long, and along the power supply line 3 of the non-contact power supply device. In order to transmit a signal by performing optical communication in the optical path, the apparatus is downsized, and in order to cover each of the optical communication fixing device 2 and the optical communication mobile device 11 with a shield made of a conductive material, the influence of electromagnetic waves is cut off. Since the transmission of the signal is stabilized and the cover 4 made of a conductive material surrounding the power supply line 3, the optical communication fixing device 2, and the optical communication mobile device 11 is provided, the electromagnetic wave generated by the power supply line 3 can be applied to an external device. It prevents electromagnetic influences and eliminates the influence of disturbance light or shielding objects to stabilize signal transmission by optical communication. As a result, it is possible to realize a non-contact power feeding apparatus that is safe, small, inexpensive, and has a long life and can control the operation of the moving body with high accuracy.
[0029]
In the present embodiment, the power supply line 3 is shown in the form of being provided in a loop shape, but is not limited to this form, and the power supply line 3 may be configured by overlapping the loops a plurality of times. Further, although the AC power supply 5 is shown as being provided outside the cover 4, the AC power supply 5 may be provided inside the cover 4.
[0030]
(Embodiment 2)
FIG. 5 is a block diagram showing a configuration of a second embodiment of the non-contact power feeding device of the present invention and a moving body to which electric power is supplied using the non-contact power feeding device. Reference numeral 6 in the figure denotes a long light guide that guides light for optical communication. In this embodiment, the light guide 6 is used between the optical communication fixing device 2 and the optical communication mobile device 11. Perform optical communication. The light guide 6 is installed with its longitudinal direction being substantially parallel to the power supply line 3, and the moving body 10 is configured to move beside the light guide 6. The light guide 6 is configured to allow light used for optical communication to pass inside and to emit light passing through the inside in a direction substantially perpendicular to the longitudinal direction at a predetermined position. 2 is installed at the end of the light guide 6, and the optical communication mobile device 11 provided in the power receiving unit 1 is arranged with the light transmitting / receiving unit 11 a facing the light guide 6. Other configurations of the non-contact power feeding device and the moving body 10 according to the present embodiment are the same as those of the first embodiment, and the corresponding parts are denoted by the same reference numerals and description thereof is omitted.
[0031]
FIG. 6 is a schematic diagram illustrating an example of the form of the light guide 6, and arrows in the drawing indicate light paths. The light guide 6 is formed of a light-transmitting material such as glass or synthetic resin, and is configured to propagate while reflecting light inside, for example, by applying a light reflecting agent to the outer wall. A light emitting unit 61 that emits light at a predetermined position on the side facing the optical communication mobile device 11 is provided by removing the light reflecting agent at the position. A signal transmitted from the optical communication fixing device 2 is transmitted through the inside of the light guide 6, emitted from the light emitting unit 61, and received by the optical communication mobile device 11. The form of the light guide 6 is not limited to the example of the present embodiment, and any form is possible as long as the light guide 6 is configured to propagate light in the longitudinal direction and emit light at a predetermined position. May be. The light guide 6 may be attached to the power supply line 3 or may be provided on the inner surface of the cover 4.
[0032]
In the present embodiment, a configuration in which a long light guide 6 is installed substantially parallel to the feeder 3 and optical communication between the optical communication fixing device 2 and the optical communication mobile device 11 is performed via the light guide 6. Therefore, the optical axis alignment between the optical communication fixing device 2 and the optical communication mobile device 11 becomes easy, and the cost can be suppressed. Further, in order to perform optical communication using the light guide 6 installed on the side of the moving path of the moving body 10, the power receiving unit 1 of the plurality of moving bodies 10, 10,. Can communicate with each of the optical communication mobile units 11, 11,.
[0033]
(Embodiment 3)
FIG. 7 is a perspective view showing a pickup according to Embodiment 3 of the contactless power feeding device of the present invention. In the present embodiment, the portion of the pickup 12 facing the power supply line 3 is provided with the friction relaxation material 12c to constitute the non-contact power supply device of the present invention. The pickup 12 includes a core 12a made of a magnetic material provided with two holes through which the feed line 3 passes, a coil 12b wound around a portion between the two holes of the core 12a, and two holes It is comprised using the friction relaxation materials 12c and 12c with which the inner surface was equipped. Both ends of the coil 12b are connected to a load of a moving body (not shown) and an optical communication mobile device. The friction modifier 12c is made of a low-friction material such as a fluororesin and is formed into a tube shape that fits to the inner surface of the core 12a. The coil 12b is wound around the feeder wire 3 positioned inside the tube. The inner surface of the core 12a is fitted. Other configurations of the non-contact power feeding device according to the present embodiment are the same as those of the first embodiment, and the description thereof is omitted.
[0034]
In the present embodiment, the portion of the pickup 12 facing the power supply line 3 is provided with the low frictional friction modifier 12c. Therefore, even when the pickup 12 contacts the power supply line 3, the non-contact power supply device is provided. It is possible to smooth the movement of the moving body to which power is supplied, and to reduce the wear and damage of the pickup 12 and the feeder line 3, thereby extending the life of the apparatus.
[0035]
【The invention's effect】
In the present invention, a power receiving unit having a pickup is provided in the mobile body to supply power, and an optical path along the path of the mobile body is provided with an optical communication fixing device and an optical communication mobile device provided in the power receiving unit. By transmitting and receiving signals such as control signals that control the mobile body, a low-noise and long-life non-contact power feeding device that can transmit power and signals to the mobile body in a non-contact manner is realized. It is possible to suppress an increase in cost without making it.
[0036]
In the present invention, since the cover made of a conductive material surrounding the power supply line is provided, the cover encloses electromagnetic waves generated from the power supply line, and affects external devices such as noise mixing or malfunction. Thus, a safe non-contact power feeding device without any problem can be realized.
[0037]
In the present invention, since the optical communication fixing device and the optical communication mobile device are arranged inside the cover, the signal transmission is stabilized without being affected by the shielding or disturbance light. In addition, when the inner surface of the cover reflects light, the light used for optical communication is reflected and signal transmission by optical communication is more stable, or the output of the optical communication fixing device and the optical communication mobile device It is possible to reduce the size of the apparatus while suppressing the above.
[0038]
In the present invention, since the optical communication fixing device and the optical communication mobile device are individually configured to be covered with a shield made of a conductive material, the influence of electromagnetic waves generated by the power supply line such as reception of noise or malfunction is blocked, and the signal Transmission can be stabilized.
[0039]
In the present invention, by installing a light guide along the power feed line and performing optical communication through the light guide, the optical axes of the optical communication fixing device and the optical communication mobile device can be easily aligned and cost reduced. And a signal can be transmitted to a plurality of optical communication mobile devices with a single optical communication fixing device.
[0040]
In the present invention, by providing a friction relaxation material in a portion facing the power supply line of the pickup close to the power supply line, wear or damage when the pickup contacts the power supply line can be reduced. The invention has an excellent effect.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an appearance of a non-contact power feeding device according to the present invention.
FIG. 2 is a block diagram illustrating a configuration of a moving body including a non-contact power feeding device and a power receiving unit according to the present invention.
FIG. 3 is a perspective view showing a pickup.
FIG. 4 is a perspective view showing an optical communication mobile device.
FIG. 5 is a block diagram showing a configuration of a second embodiment of a non-contact power feeding device of the present invention and a moving body to which electric power is supplied using the non-contact power feeding device.
FIG. 6 is a schematic diagram showing an example of a form of a light guide.
7 is a perspective view showing a pickup according to Embodiment 3 of the non-contact power feeding device of the present invention. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Power receiving part 10 Mobile body 11 Optical communication mobile equipment 11b Shield 12 Pickup 12c Friction relaxation material 2 Optical communication fixing machine 3 Feed line 4 Cover 5 AC power supply 6 Light guide

Claims (3)

交流電流が流れる給電線と、該給電線に沿って直線運動を行う他の装置に設けられ、前記給電線に近接して誘導起電力を発生させるピックアップを用いて前記装置へ前記誘導起電力を供給する受電部とを備える非接触給電装置において、光通信固定機と、前記受電部に設けられ、前記光通信固定機との間で光通信を行う光通信移動機と、前記給電線を囲繞する導電材製のカバーとを備え、前記光通信固定機及び前記光通信移動機は、前記給電線に沿った光路を用いて光通信を行うように、距離を隔てて相対してあり、前記光通信固定機及び前記光通信移動機は、前記カバーの内側に配置されていることを特徴とする非接触給電装置。The induced electromotive force is supplied to the apparatus using a pickup provided in a feeder line through which an alternating current flows and another apparatus that performs linear motion along the feeder line and generates an induced electromotive force in the vicinity of the feeder line. In a non-contact power feeding device including a power receiving unit to be supplied, an optical communication fixing device, an optical communication mobile device that is provided in the power receiving unit and performs optical communication with the optical communication fixing device, and surrounds the power supply line A cover made of a conductive material, and the optical communication fixing device and the optical communication mobile device are opposed to each other at a distance so as to perform optical communication using an optical path along the feeder line, The non-contact power feeding device , wherein the optical communication fixing device and the optical communication mobile device are arranged inside the cover . 前記光通信固定機及び前記光通信移動機は、それぞれ導電材製のシールドにて覆われていることを特徴とする請求項１に記載の非接触給電装置。The contactless power feeding device according to claim 1, wherein the optical communication fixing device and the optical communication mobile device are each covered with a shield made of a conductive material. 前記ピックアップは、前記給電線に面している部分に摩擦緩和材を備えることを特徴とする請求項１又は２に記載の非接触給電装置。The pickup, contactless power supply device according to claim 1 or 2, characterized in that it comprises a friction member at a portion facing the feed line.
JP2002132760A 2001-05-23 2002-05-08 Non-contact power feeding device Expired - Fee Related JP3778874B2 (en)

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JP2005186842A (en) * 2003-12-26 2005-07-14 Murata Mach Ltd Track carriage system
JP4511379B2 (en) * 2005-02-15 2010-07-28 日精株式会社 Elevator stop position detector
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JP4999443B2 (en) * 2006-12-15 2012-08-15 東芝エレベータ株式会社 Non-contact power feeding device
CN104488165B (en) * 2012-07-11 2018-06-22 富士机械制造株式会社 Electrostatic coupling mode contactless power supply device
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