WIRELESS POWER TRANSFER SYSTEM WITH POSITIONING FUNCTION

A wireless power transfer system includes: a transmitting side, which includes a resonant transmitting circuit, the resonant transmitting circuit including a transmitter coil; and a receiving side, which includes a resonant receiving circuit, the resonant receiving circuit including a receiver coil for performing induction with the transmitter coil to generate a resonant receiver voltage, wherein the transmitter adjusts a transmitter current of the resonant transmitting circuit according to the resonant receiver voltage such that the resonant receiver voltage is regulated to a target voltage level. The wireless power transfer system determines a shift distance from a present relative position to an optimal relative position according to the adjusted transmitter current of the resonant transmitting circuit.