Output Power Control of an S-S IPT System Based on Voltage and Frequency Tuning for EV Charging

Abstract

This digest proposes a power control strategy using a voltage boosting and frequency detuning approach in an S-S compensated EV IPT system. voltage is increased to increase output power, and frequency is increased from the resonant frequency to decrease output power, reducing the voltage range requirement of the input. The system is designed to maintain full power range control despite fluctuating load and misalignment condition. A prototype is developed that achieves 0.0–3.3kW power control across all battery load and x-y misalignment combinations. The proposed strategy is tested by constructing an experimental prototype, that achieves a peak DC/DC efficiency of 95.7%