| Abstract |
In this work, four different snubber solutions for an Auxiliary Resonant Commutated Pole (ARCP) con-verter with an auxiliary thyristor are evaluated. The first two solutions are an RC snubber and a variationthereoff where the RC snubber losses are reduced by employing diodes for limiting the voltage over-shoot. Two other concepts are a novel lossless dV/dt clamp snubber circuit and a low-loss RC snubbercircuit, which has good fault tolerance and improved efficiency. This solution is implemented using SiCMerged P-i-N Schottky (MPS) diodes, which enables a cost-effective implementation with a high surgecurrent capability on a small total chip area. Measurement results confirm that the snubbers limit thevoltage overshoot and that the efficiency of the proposed low-loss RC snubber circuit is a substantialimprovement over a conventional RC snubber. |
