In an impedance matching device between a power transmission circuit and a power transmission antenna, a storage unit stores tables associated with a load value, each storing control values of a coupling coefficient between the power transmission and reception antennae. A selection unit selects a table corresponding to the load value estimated by the load value estimation unit. An adjustment direction determination unit determines the direction of a position for reading out one of the control values from the selected table. A readout position determination unit determines the position for reading out the control value from the selected table based on the direction and a predetermined step width for shifting the position for reading out the control value. A circuit selection unit electrically connects a matching circuit or the through circuit. A control value output unit outputs the control value at the determined position to the selected circuit.


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    Title :

    Impedance matching device and control method


    Contributors:

    Publication date :

    2016-11-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS , Scheinwiderstandsnetzwerke, z.B. Resonanzkreise / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / H04B TRANSMISSION , Übertragung



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