Single-stage bridgeless SEPIC-assisted static wireless light electric vehicle charger

This article proposes an enhanced power quality single-stage wireless charging solution for the light electric vehicle. A bridgeless modified SEPIC (BMSEPIC)-based high-power factor AC–DC converter is being implemented to improve the performance at the various charging modes. The conventional SEPIC converters suffer from circulating current, which negatively impacts the power quality of the grid, efficiency and voltage regulation of the chargers. This proposed modified bridgeless SEPIC converter guarantees the absence of circulating current. Furthermore, the control complexity is simplified while operating at discontinuous mode which enables cost reduction. The magnetic component size, reduced weight and the losses associated with switching devices are also minimized. The proposed charger is designed for 3.7 kW rated power. The resonating frequency of the primary and secondary pads is taken as 85 kHz as per the standard SAE J 2954. Develop a complete mathematical model of the proposed BMSEPIC-based WPT system. The simulation study is carried out in MATLAB/Simulink to validate the system theoretically. A 3.7 kW hardware laboratory model was developed for the practical validation of the proposed BMSEPIC-based WPT system. The efficiency obtained under rated standard operating conditions is 92.43%. The input power factor of the proposed system is 0.98, and the input voltage and current THD are 2.8 and 4.0%, respectively.