Detail Design and Analysis of a Phase Shift Full Bridge Converter with ZVS in Wide Range for Electrical Vehicles Application

Increased deployment of electric vehicles (EVs) due to their lower emissions and environmentally friendly features has resulted in an improved need for efficient power electronic converters. These converters primarily contribute to reducing the charging time, thereby enhancing the competitiveness of EVs in comparison to fossil fuel-powered vehicles. Among the different topologies, the phase-shifted full-bridge (FSFB) converter stands out as a widely-used solution. However, it suffers from a high current ripple and power losses in the rectification stage. A FSFB converter with a current-doubler rectifier (CDR) and synchronous rectification is proposed here to overcome these drawbacks. This topology overcomes the drawbacks associated with ripple and power losses of the previous configurations. However, it still does not realize zero voltage switching (ZVS) at light load conditions. In this study, we add a series-resonant inductor combined with the leakage inductance of the high-frequency transformer to realize ZVS, even at light load conditions. We give a detailed analysis of the proposed scheme, explaining timing intervals and design processes in detail. MATLAB/Simulink software simulation results validate the effectiveness of the proposed approach.