A Novel Single-Stage PFC Based on Active Clamp Forward Converter

Abstract

This article describes a new novel single-stage PFC converter circuit based on active clamp forward. The circuit of the PFC converter and active clamp DC/DC converter together. It is suitable for a lot of the power supply application fields with simple structure & low cost. Also this article analyzes its detailed operating principle, and the circuit switches process especially. The experimental prototype test results show that the circuit topology to achieve the main switch & the auxiliary switch with the zero voltage turn-on, and the power factor being above 0.98, the efficiency being more than 88% at rated conditions.