Aimed at the bi-directional wireless charging system for electric vehicles

three types of resonant topology are investigated. On the basis of modeling and analysis

the three topologies are compared with reference to the demands of electric vehicle wireless charging application

including the robustness on parameter variation and system fault

the maximum transfer power under specific operating conditions and the voltage on resonant capacitors. Studies show that LCC resonant topology while inheriting the advantages of LCL resonant topology

has also solved the problems of small transfer power and DC magnetization and so even more suitable for bi-directional wireless charging of electric vehicles. The experimental results verify the analysis. This work is supported by the Major Program of National Natural Science Foundation of China(No. 51490683).