An unity high power factor power supply rectifier using a PWM AC/DC full bridge soft-switching

This paper proposes an improvement of an isolated unity-power-factor rectifier AC/DC PWM based on a PWM full bridge converter using a commutation cell. This converter operates using soft switching technique. It presents high power factor, full control of the output dc voltage and high-frequency line filter inductor and insulation transformer. It is based in an auxiliary voltage source that feeds the resonant circuit, charging a capacitor that provides the condition for zero voltage switching (ZVS) of the main switches. This paper presents a detailed analysis of the topology, which is then verified by means of complete theoretical analysis, operating principles and simulation results are presented to show the feasibility of proposed power factor correction converter. This work presents simulations and experimental results of a prototype converter operating at 100 kHz.