To provide an impedance matching circuit for dramatically improving the calculation speed of the load impedance required for impedance matching and the matching amount, and the matching accuracy, and to provide a non-contact power supply system having the impedance matching circuit.SOLUTION: There is provided an impedance matching circuit that identifies only the amplitude component from first and second reflection coefficients obtained by a change element capable of changing the load side reflection coefficients, calculates the load impedance by a quadratic equation formed from a calculation formula of two amplitude components, computes the reactance amount of a variable reactance element required for target impedance matching for matching with the output impedance from the calculated load impedance, thus adjusting the impedance of the variable reactance element.SELECTED DRAWING: Figure 1

    【課題】インピーダンス整合に必要な負荷インピーダンスと整合量の算定速度及び整合の精度を飛躍的に向上させるインピーダンス整合回路及び該インピーダンス整合回路を有する非接触給電システムを提供することを目的とする。【解決手段】負荷側の反射係数を変更可能な変更素子によって得られる第1反射係数と第2反射係数から、振幅成分のみを特定し、2つの振幅成分の算出式から生成される二次方程式により負荷インピーダンスを算出し、算出された前記負荷インピーダンスから出力インピーダンスとの整合をとるための目標インピーダンスを整合させるために必要な可変リアクタンス素子のリアクタンス量を算定し、可変リアクタンス素子のインピーダンスを調整するインピーダンス整合回路を提供する。【選択図】図1


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    Title :

    IMPEDANCE MATCHING CIRCUIT AND NON-CONTACT POWER SUPPLY SYSTEM HAVING IMPEDANCE MATCHING CIRCUIT


    Additional title:

    インピーダンス整合回路及び該インピーダンス整合回路を有する非接触給電システム


    Contributors:
    OKUDA SHINGO (author) / YUAN QIAOWEI (author) / SATO TAKU (author)

    Publication date :

    2020-05-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS , Scheinwiderstandsnetzwerke, z.B. Resonanzkreise



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