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This paper describes a study improving mid-power snubber assisted zero voltage zero current transition (SAZZ) chopper by switched tail loss cancel circuit (TLC) for the electric vehicle (EV) and fuel cell electric vehicle (FCEV) application. The proposed topology offers a solution against tail loss increase problem when SAZZ soft switching topology is applied to mid-power range chopper design. Discharge...
An improved bi-directional buck/boost SAZZ topology is proposed in this paper. The improvements are aimed at increasing the total conversion efficiency as well as at enlarging the soft switching operating area and hence improving the overall converter performance. The modifications with respect to the conventional SAZZ topology are: configuration of snubber circuits enhanced by saturable inductors...
In the past, we have proposed a high frequency, high efficiency and high power chopper based on new soft switching topology SAZZ (Snubber Assisted Zero Voltage and Zero Current Transition chopper) for FCEV application. We studied the effectiveness of the SAZZ method by simulation and by experiment. This time we concentrated on digital control of SAZZ converter by FPGA. We report on the status quo...
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