Analysis and Design of Line Matching Networks for Inductive Power Transfer System of Electric Vehicles

A comparative study is presented in this paper to design and analyze the performance of Line Matching Network (LMN) of an inductive power transfer (IPT) system used for battery charging of electric vehicles. An LCC-type LMN configuration is designed based on fundamental mode analysis (FMA) for the ground assembly and three LMN configurations are designed based on FMA for the vehicle assembly including: CCL, CC and CLC types. Moreover, a comparative study is performed in frequency domain to analyze the performance of the IPT system for each LMN combination. Numerical results show that among the vehicle assembly LMN alternatives, the CC type yields superior performance with less number of energy storage elements. It is worth mentioning that the final tuning of an LMN configuration can be optimized after integration into an actual prototype IPT system based on field measurements, and the design methodology proposed in this study serves as the first step in the tuning process of a LMN.