Research on Two-Side Single-Stage Wireless Power Transfer System for Power Frequency Electricity

Both the transmitter and the receiver of the traditional power-frequency wireless power transfer (WPT) system adopt a two-stage structure, which has disadvantages such as low efficiency, large volume, and high cost. Therefore, based on the interleaved parallel totem-pole converter, this paper proposes a two-side single-stage wireless power transfer system for 50Hz electrical energy. Compared with the traditional two-stage structure, the single-stage structure significantly reduces the number of power semiconductor devices, improves the overall efficiency, and the input port has a power factor correction (PFC) function. Moreover, under the conditions of mutual inductance and load variations, the entire system can achieve constant voltage output by adopting simple control methods. Simulation results verify the feasibility of the overall system and the control method.