Strategy for Reducing Oscillations in Power Electronic Circuits Using Gate Control

Abstract:
This paper addresses the issue of reducing switching oscillations in a basic power electronic commutation cell. Based on previous publications, an analytical model of the turn-off process is presented leading to an optimization strategy. According to this, an optimum can be found allowing a fast switching transition and thus small switching losses as well as reducing the oscillation amplitude to a minimum and hence, improving electromagnetic compatibility characteristics. The theory is validated by measurement followed by a discussion of its practicability for power electronic applications.