Fundamental research on control method for power conversion circuit of wireless in-wheel motor using magnetic resonance coupling

The in-wheel motor (IWM) is the most preferred driving mechanism of electric vehicles for its advantages of vehicle motion control, energy efficiency, and vehicle design flexibility. One of the technical problems of the IWM is the reliability of power and the signal wires. Wireless power transfer technology is the best solution to this problem. In this paper, a bidirectional wireless power transfer circuit using a primary inverter and a secondary converter is proposed. We propose a control method for both the inverter and the converter to stabilize the secondary DC-link voltage. The proposed method is verified by simulation and experiment using simulated test equipment.