A novel multiple-frequency inverter topology for inductively coupled power transfer system

High frequency is an effective method to improve transmission efficiency of inductively coupled power transfer (ICPT) system. However, it is hard for the high capacity semiconductor device to meet the high frequency need. In this paper, a novel multiple-frequency inductively power transfer system is proposed. By adopting a novel multiple-frequency topology of inverter, the transfer frequency of the system could be several times the inverter's switching frequency. A doubled-frequency half bridge inverter is proposed in the paper, and it is analyzed and compared with the traditional one. Simulation and experiment results indicate that doubled-frequency inverter based inductively power transfer system can improve the transfer frequency effectively and the transmission efficiency is increased especially for high power application.