Design Considerations of Compensation Topologies in ICPT System

Topology selection involved in the design of the inductively coupled power transfer (ICPT) system is presented in this paper. Different compensation topologies of ICPT system are discussed, including single-resonant compensation and multi-resonant compensation topologies. Voltage and current gain are obtained in each case. The concept of power factor in resonant converter is introduced to minimize the VA rating of the switches and to optimize the parameter design. From the analytical results and the plots obtained, it is found that series compensation on primary side is more effective to nullify the leakage inductance than other single compensation topologies. And the performance of compensating both primary and secondary sides is much better than compensating only one side. Characteristic curves vs. variation of different parameters are compared and analyzed, which will aid in the design of the circuit. One of the topologies discussed is constructed as an example to address the design considerations of ICPT system and to demonstrate the performance of a practical system.