Abstract
The application of the SiC MOSFET can improve the efficiency and power density of the auxiliary converter for trams. In this paper, the design process is given. According to the system requirements, the topology, the SiC device and its driver are selected. Then the switching frequency of the high frequency DC/DC module and the three-phase inverter module of the system are determined according to the loss simulation model. At last, the SiC auxiliary converter prototype has been developed whose rated power reaches 40kW and the power density reaches 133VA/L, the output of the system meets the requirement.
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