A Modular Single-Channel Dual-Frequency Wireless Power Transfer System to Achieve Multiple Selective Constant-Voltage Outputs with Zero Phase Plane

This paper proposes a modular single-channel dual-frequency wireless power transfer system for industrial power supply with a dual-frequency hybrid compensation topology. The series-series topology is adopted with working frequency locating at its two constant-voltage (CV) output points for the CV outputs. The band-stop filter with a parallel resonant network is designed to filter the undesired frequency component and the series series-parallel resonant network is formed to avoid the impact of the band-stop filter on the CV output. In this way, selective power transfer with CV outputs can be achieved. The mathematical model of the proposed compensation topology has been established and analyzed. The transmission coils and the compensating inductors are integrated to achieve a compact structure. An experimental prototype is built to verify the theoretical analysis. The system realizes CV outputs and supplies power to different loads at different operating frequencies, with transfer efficiency of more than 83.94% and output power of 99.53 W.