Abstract

This paper presents a novel low-ripple AC–DC conversion architecture for Electric Vehicle (EV) or industrial load applications, integrating a Modified Soft Switching Power Factor Correction (MSS-PFC) boost converter stage with high-frequency galvanic isolation and synchronous rectification. Front-end PFC circuit integrates a dual-loop control mechanism combining a hysteresis current control strategy with voltage and current PI controllers. This approach ensures accurate input current shaping, reduced Total Harmonic Distortion (THD), and near-unity power factor, while providing stable and ripple-free DC output ideal for load. The intermediate high-frequency inverter and isolation transformer enable compact design and safe voltage level adaptation, meeting safety and performance standards required in EV infrastructures. On the secondary side, an interleaved synchronous rectifier with closed-loop control minimizes switching losses and enhances energy transfer efficiency. The coordinated control structure ensures excellent dynamic response and robust output voltage regulation under varying input and load conditions, which are common in real-world EV charging scenarios. MATLAB simulation results validate that the proposed system achieves superior power quality, enhanced efficiency of 97.89%, and effective ripple suppression compared to conventional converter topologies.

Key words: AC–DC conversion architecture, MSS-PFC boost converter, dual-loop control mechanism, EV charging.