An Auxiliary Passive Circuit and Control Design for Wireless Power Transfer Systems in DC Microgrids with Zero Voltage Switching and Accurate Output Regulations

This paper presents an auxiliary passive circuit and control design for wireless power transfer (WPT) systems in DC microgrids to achieve optimal efficiency while maintain accurate output voltage regulation. An inductance is added at the transmitter resonator form a current sink ensure zero switching (ZVS) of primary-side full-bridge inverter with even extremely light load conditions. Moreover, adaptive proportional–integral (PI) controller adopted track references by regulating phase shift angle inverter. The coefficients PI are determined inductance. Both simulation experimental results validated effectiveness proposed achieving regulation WPT source variations.