A Novel Efficient Hybrid Compensation Topology for Wireless Power Transfer

Wireless power transfer systems require compensators to improve efficiency by increasing transfer power between transmitter and receiver. The most commonly used compensators are series-series (SS), series–parallel, and double-sided LCC. This article analyzes the comparison between typical compensators focusing on transfer efficiency. Due to these characteristics of typical compensators, a hybrid compensation topology is designed based on two compensators. Hybrid compensation topology is capable of switching between SS and double-sided LCC topologies. Two ac switches are used on the transmitter and receiver for switching mode in hybrid compensation topology with wireless communication links, and its variation algorithm is clarified. A novel compensation topology guarantees system’s efficiency for a wide range of loads based on the maximum efficiency of two compensation topologies. The possibility of a proposed hybrid compensator is verified with an experimental prototype used for massive vehicles.