Simulation Study of Parasitic and Gate-drive Effects on An Autonomous Push-pull Resonant Converter Based IPT System

Abstract

Autonomous current-fed push-pull resonant converters (AC-PPRC) provide a cost-effective and reliable solution for achieving high-frequency Inductive Power Transfer (IPT). This paper studies the effects of the parasitic parameters and gate-drive circuit on the performance of an AC-PPRC-based inductive power transfer (IPT) system. Theoretical modeling, analysis, and simulation studies are carried out by considering various parasitic parameters and gate-drive setups to investigate their impacts on the system performance. The research shows that these components can significantly affect system operational frequency, power transfer, and efficiency. Nonetheless, the parasitic and gate-drive speed up capacitances can be effectively used for tuning the primary circuit at a few MHz. The findings are used as system design guidance to utilize the parasitic components and optimized gate-drive circuit. A simulated IPT system demonstrates stable soft-switching operations above 5 MHz with 16W power output and 92% efficiency.