Rotary Capacitive Power Transfer with Class-E Inverter And Balun Circuit

Capacitive power transfer (CPT) becomes attention among researchers in wireless power transfer technology field. A CPT system consists of a coupler between the primary and secondary unit for transferring power. This work purposes to simulate, develop and design a CPT system for rotating application by using Class-E inverter and Ruthroff balun to minimize the scale and the weight of the circuit in the secondary module. The proposed CPT topology is designed and implemented in two plate couplers with switching frequency of 6.78 MHz. The efficiency of the proposed CPT system is obtained, and experimental results demonstrates the suitability of the proposed CPT system in transferring power for rotating application.