Study on Improving Overall Efficiency of Front-end Power Supplies by Employing Method of Surge Energy Recycling

Abstract

In this paper, the authors propose a surge energy recycling converter. The proposed circuit is able to reduce the surge voltage of the secondary side and to recycle the surge energy, in a DC-DC converter stage of a conventional front-end power supply. Thus, the use of the low blocking voltage rectifier elements is possible, and the conduction loss is decreased. Further, the amount of surge energy that is wasted in a snubber circuit is decreased. As a result, the efficiency of the DC-DC converter stage is improved by about 1 percentage point.