A new topology of flyback converter with active clamp snubber for battery application

Abstract

This paper proposes a high efficiency 3[kW] flyback converter with active clamp snubber. The proposed converter comprises of flyback part and active clamp snubber part. The flyback part achieved soft switching which at conventional flyback combined LC snubber. And, the active clamp snubber part applied LLC resonant converter. The leakage inductance of flyback transformer generates additional peak voltage to at both ends of the main switch. The higher voltage at both ends of switch shows higher loss at steady state. The active clamp snubber part removes on generated additional peak voltage by the leakage inductance. As well as, the active clamp snubber pass a portion of the whole output power to load. As a result, the proposed converter can reduce peak voltage stress and current stress at steady state, switching loss. Integrity of the proposed converter is validated using both theoretical analysis and PSIM simulation.