Coupled nondissipative snubber fed single-stage AC/DC converter for simple low power level power supply application

Abstract

This paper presents a new single-stage forward converter with a magnetic coupled nondissipative snubber, which gives good power factor correction (PFC), low current harmonic distortion and tight output voltage regulation. The proposed converter features the low switch current stress and the low switch voltage stress, essential for the design of a single-stage power factor correction converter. The prototype shows the IEC 1000-3-2 requirements are met satisfactorily with nearly unity power factor. This proposed converter with magnetic coupled nondissipative snubber is particularly suited for low power level power supply applications.