Power Control and Efficiency Enhancement Topology for Dual Receiver Wireless Power Transfer EV Quasi-Dynamic Charging

A Quasi-Dynamic Wireless Inductive Power Transfer (QDWIPT) system for Electric Vehicle (EV) charging applications, benefits from user-friendly charging with reduced charging duration and limited battery capacity for long-distance travel. This article proposes the Dual receiver power control and Power Transfer Efficiency (PTE) enhancement topology for the QDWIPT system. This topology inculcates; a half-active bridge rectifier for Dual pickup Receiver (Rx) coils and battery charging power controlled by a DC-DC converter in the secondary unit. The power controller design and control strategies are based on dual receiver topology and the DC-DC chopper model for an effective battery charging process. The dual pick-up decoupled feature coils are placed at optimal distance, with a resonant compensator to minimize the cross-coupling effect in the wireless coupling region. The half-active rectifiers maximize the transmitting efficiency of the dual receiver coil topology with the power control method. This proposed QDWIPT topology is experimentally investigated for a 3.3 kW prototype and power-controlled battery charging is discussed in this article.