Electric Vehicle On-Board Fast Charging Through Converter Maximum Switch Utilization

This paper introduces an innovative approach to electric vehicle (EV) on-board fast charging, utilizing a converter topology that maximizes the utilization of semiconductor switch ratings. Existing single-stage and two-stage charger topologies are often constrained by high voltage and current stresses, limiting their ability to support fast charging. To address these challenges, this work proposes a bridgeless switched inductor (BLSI) Cuk converter with a high step-down gain configuration. This design operates at a higher duty cycle, minimizing energy mismatches and reducing switch stress. The proposed topology achieves up to three times faster charging compared to conventional converters, with experimental validation confirming its enhanced efficiency, dynamic performance, and reduced footprint. MATLAB/Simulink simulations and a scaled-down laboratory prototype demonstrate the feasibility and effectiveness of this novel charger design, making it a promising solution for EV fast charging applications.

Keywords: EV fast charging, bridgeless switched inductor (BLSI) Cuk converter, power factor correction (PFC), On-board charger, PI Controller.