A wireless power supply system includes a power transmission device (10) having a power transmission coil (14) and a power receiving device (40) having a power receiving coil (41). The power transmission coil (14) transmits electric power to the power receiving coil (41) via a wireless connection, so as to supply the electric power to a battery (44) installed in the power receiving device (40). The power transmission device (10) includes a power factor calculator (31) configured to calculate a power factor (cos¸) based on a phase difference between a voltage and a current supplied to the power transmission coil (14), and a control amount calculator (29) configured to control electric power supplied to the power transmission coil (14) according to a power command value (Pbat*), and regulate the electric power supplied to the power transmission coil (14) when the power factor falls to a predetermined threshold power factor or less. The power transmission can therefore be regulated immediately when the power receiving coil (41) is shifted from the power transmission coil (14).


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    Title :

    NON-CONTACT POWER SUPPLY SYSTEM AND POWER TRANSMISSION DEVICE


    Additional title:

    KONTAKTLOSES ENERGIEVERSORGUNGSSYSTEM UND ENERGIEÜBERTRAGUNGSVORRICHTUNG
    SYSTÈME D'ALIMENTATION ÉLECTRIQUE SANS CONTACT ET DISPOSITIF D'ÉMISSION D'ÉNERGIE


    Contributors:

    Publication date :

    2019-10-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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