Practical Active Auxiliary Resonant DC Link Snubber with A Single Diode Clamping Loop for Suppressing Its ZCS Related Switch Parasitic High Frequency Oscillation

Abstract

A practical active auxiliary quasi-resonant dc link snubber circuit with a diode clamping loop to reduce the switching losses and suppress a voltage ringing which causes in the loop including auxiliary zero current switching device; IGBT with parasitic electrostatic capacity is evaluated experimentally.