Design of Capacitive Power Transfer System <Abstract> This study proposes a design of a capacitive power transfer (CPT) system. The proposed system consists of a load-independent (LI) class-EF inverter, two pairs of coupling capacitors, an LCCL filter, and a class-D rectifier. The proposed system uses a class-EF inverter to reduce the voltage stress on the switches and an LCCL filter to convert the LI constantcurrent (CC) output characteristic of the class-EF inverter to a constant-voltage (CV) characteristic, thereby achieving zerovoltage-switching (ZVS) and constant output voltage regardless of load variations. The output voltage can also be adjusted arbitrarily depending on the design of the LCCL filter. This study analytically demonstrates the design method of the proposed circuit and shows the effectiveness of the proposed circuit through actual device verification. |