Analysis of the effect of design parameters on the power transfer efficiency of resonant inductive coupling based wireless EV charging system

Both simulation and experimental investigations have been conducted to obtain an appropriate elucidation for improving the power transfer efficiency of a resonant inductive coupling based wireless system for electric vehicle charging. It is seen that the optimum power transfer efficiency of the wireless system depends on the driving frequency, charging coil structure, configuration, vertical spacing and misalignment between the charging coils. Under the strong magnetic coupled condition, the efficiency is found to be maximum. In order to make the charging system more viable, the effects of the operating parameters on the performance of wireless power transfer system are analyzed using electromagnetic simulation and experiments. The analysis may provide the design guidelines for efficient charging of EVs even under non-ideal scenarios.