A charging frequency between a transmitting coil and a receiving coil of a wireless power transfer (WPT) system is found by setting an input voltage to the transmitting coil at a fixed voltage, shunting the receiving coil, determining an input current frequency range in which a resonant frequency is expected to be found, frequency polling within the first input current frequency range using a set of polling frequencies in the input current frequency range, and selecting as the charging frequency a polling frequency having a lowest input current. Alternatively, the charging frequency may be determined by determining, at each polling frequency within the input current frequency range, a ratio of current in the receiving coil and current in the transmitting coil and selecting as the charging frequency a polling frequency where a peak of the ratio of the current in the receiving coil and the current in the transmitting coil is found.


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    Title :

    Charging Frequency Determination for Wireless Power Transfer


    Contributors:

    Publication date :

    2025-02-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    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



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