A Comparative Study of Two Passive Regenerative Snubbers for Flyback Converters

Flyback Converters are widely used in many applications because of their simplicity. They can be implemented by using active or passive snubbers. Passive snubbers considered to be cheaper but less efficient. The recent development of regenerative energy passive snubbers has resulted in more efficient passive snubbers. Two different passive regenerative energy snubbers are examined in this paper — a previously proposed snubber and a variation of this snubber that has been modified by the authors. In this paper, the operation of the two converters is explained and experimental results and efficiency curves obtained from prototype converters are then presented. Based on the efficiency curves, conclusions are made about the relative efficiency of the two snubbers.