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.
Charging Frequency Determination for Wireless Power Transfer
2025-02-27
Patent
Electronic Resource
English
CHARGING FREQUENCY DETERMINATION FOR WIRELESS POWER TRANSFER
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