A Non-dissipative snubber circuit optimized for parallel operation of semiconductor switches designed by voltage boost choppers

Abstract

A detailed analysis and the experimental results obtained for a non-dissipative snubber circuit optimized for parallel operation of semiconductor switches in voltage buster choppers are reported. The introduction presents a comparison of some of the non-dissipative snubber circuits including their shortages. The principle of operation is analyzed in detail by using the corresponding functional circuit diagrams and analytical expressions for particular operational phases of the snubber circuit. For practical verification the experimental results are recorded for a 1.6kW voltage boost chopper of 100kHz switching frequency and the proposed snubber circuit. © 2009 Praise Worthy Prize S.r.l.