A Novel Asymmetric Half-Bridge Inverter for Capacitive Wireless Power Transfer

Capacitive wireless power transfer (CPT) is becoming a promising alternative to the inductive power transfer (IPT) due to the low cost and simplicity of the coupler link. However, if the configuration of the conventional IPT system is directly applied to the CPT, it increases the cost of the system. The paper proposes a topology to make CPT system more simple with the high voltage gain and the wide zero voltage switching (ZVS) feature. The target system is a low power system with the universal input voltage and wide load range applications (110V-340V, 6W-60W). The design and analysis procedures are presented, and the circuit is simulated in PSIM to verify the performance of the proposed topology.