Implementation of Modified B-PFC Converter with Synchronous Rectification for High-Efficiency AC- DC Power Conversion System

Abstract

AC-DC power conversion system serves as the backbone of modern energy conversion, bridging utility supply and DC-powered loads with enhanced performance, compactness, and reliability. In this work, an advanced Modified Bridgeless PFC (B-PFC) converter is proposed for enhancing the performance, high power factor and minimal input current distortion. A single-phase ($\mathbf{1} \boldsymbol{\emptyset}$) high-frequency inverter and isolation transformer are used to provide the dynamic response and reduce common-mode noise. The ($1 \varnothing$) high-frequency AC from the transformer is then fed into the synchronous rectifier, which converts it back into DC with minimal conduction and switching losses by a PWM generator. The DC-link voltage and current are controlled by dual PI controllers, offering stabilized voltage and improves dynamic response. Simulation outcomes achieved from MATLAB validation demonstrate that the proposed system outperforms with a PF of 0.97, Total Harmonic Distortion (THD) of 0.96% and efficiency of 97.53%.