A novel approach to transformer less on board charger

This paper provides an extensive study on the design, simulation, and performance analysis of a transformer less on-board charger for electric vehicles. The key objective of this study is to investigate the feasibility and potential benefits of transformer less on-board charger in terms of size, cost, efficiency, and efficient power conversion. The proposed design is validated by performing simulation in LTspice and experimental findings, and the system performance is assessed in terms of power factor for the PFC stage and in terms of output voltage and output current for the DC-DC converter stage. PFC and DC-DC converter design parameters are chosen so that the output power of the on-board charger is 3.3 kW. Totem Pole bridgeless PFC is utilized with high switching frequency to obtain the unity power factor and to decrease component size. In the second stage, a non-isolated interleaved buck converter is employed. The adoption of SiC-based MOSFETS results in a decreased power loss for the suggested EV charger.