A family of low EMI, unity power factor converters

Abstract

A new family of soft switching, unity power factor converters with high input power factor and isolated output is presented. A feature of the converters is a significant reduction of conducted EMI. Six converter topologies have been identified that share a zero voltage switching phase arm on the input boost converter stage. Detailed analysis and experimental results are presented on the double ZVS phase arm, resonant transition converter, which is operated at constant switching frequency.