A high frequency, high efficiency and high power chopper SAZZ and the test evaluation at 100kHz-8kW

Abstract

This paper presents a new high frequency, high efficiency and high power chopper SAZZ (Snubber Assisted Zero Voltage and Zero Current Transition chopper) aimed for the fuel cell electric vehicle (FCEV). The SAZZ offers new soft switching scheme resulting in the high frequency operation for the elimination of size and weight. Furthermore, the SAZZ operates in high efficiency and high power. For confirming the practical effectiveness of the SAZZ topology, one-tenth prototype model was fabricated actually and tested at the 100kHz 8kW rating. The circuit geometry, the basic operation and the efficiency were verified.