Isolated Single Switch High Frequency Inverter for Wireless Charging of Light Electric Vehicles

Reduction in power conversion stages, low cost, less volume, and miniaturization, supports the development and commercialization of Wireless power transfer (WPT). This work details the THD reduction and input Power Factor Correction (PFC) for EV applications. To address the supply power quality problems and reduce the number of switches used, a single-switched boost-based isolated Flyback converter is proposed as the forepart converter. Reducing the quantity of switches leads to a simplification in pulse generation, resulting in decreased losses and an overall improvement in efficiency. The recommended single-stage, single-switched converter at the front-end operates in Discontinuous Conduction Mode (DCM), offering integral Power Factor Correction (PFC). This converter is specifically designed to deliver 3.7kW of output power at a resonant frequency of 85kHz and an output voltage of 400V. Utilizing MATLAB/Simulink simulations, the proposed front-end converter is evaluating the performance, achieving a maximum efficiency of 96.85%.