Receiver Position Identification Method of Wireless Power Transfer System Based on Magnetic Integration Inductance

This article proposes an receiver position identification (RPI) method based on magnetic integration compensation inductance, using the voltage and current of the magnetic integration compensation inductance, and the transmitter current. Compared with the conventional methods, the proposed method does not add additional detection coils and position sensors, and RPI is realized based on electric parameters of the primary magnetic integration compensation inductance and transmitter. First, the coupling relationships between the magnetic integration compensation inductance, transmitter and receiver with different wiring modes are analyzed. Meanwhile, an integration compensation inductance structure with minimal coupling impact on the receiver and transmitter coils is determined. Then, based on the magnetic integration compensation inductance structure, the RPI method is analyzed, which can detect the receiver position in the x–y plane without secondary-side information. Finally, the proposed RPI method is experimentally verified, and the results show that the proposed method can effectively identify the receiver position.