Analysis and Evaluation of Compensation Topologies in Wireless Charging Systems for Electric Vehicles

This paper comparatively analyses the four fundamental compensation topologies (series-series (SS), series-parallel (SP), parallel-series (PS), parallel-parallel (PP)) for wireless power transfer (WPT) systems applied to electric vehicle (EV) charging, evaluating by MATLAB/Simulink the energy efficiency, voltage/current constraints and misalignment tolerance. The results show that: SS topology achieves the best efficiency with stable voltage regulation but increased sensitivity to coupling variations; SP has the advantage of reducing stress on switches while increasing circuit complexity; while PS and PP configurations demonstrate better output current stability but higher losses under misalignment conditions. The analysis provides clear recommendations for the choice of topologies according to target applications, highlighting the trade-offs between energy performance, robustness and implementation complexity in wireless charging systems for electric vehicles (EVs).