Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Study on the Auxiliary Power Supply for the Railway Vehicle by Using Wide Band Gap Device
Authors Yeon-Woo Choi ; Byoung-Hee Lee
Page pp.168-173
ISSN 1229-2214
Keywords APS(Auxiliary Power Supply) ; Sic device ; Single switch boost converter ; Wide-band-gap
Abstract In this paper, an auxiliary power supply (APS) for railroad cars is proposed. The APS can reduce the number of devices required to supply power through structural modification and operates at a high switching frequency by application of a SiC device. The voltage stress on the device in the proposed circuit can be reduced to less than half of the input voltage of the system; thus, a device with low breakdown voltage can be designed. By adapting a SiC device instead of an IGBT device, the proposed circuit can reduce switching and conduction losses and operate at a high switching frequency, thereby reducing output voltage and inductor current ripples in the proposed circuit. The theoretical analysis results of the proposed APS are verified with a 40 kW computer-based simulation and a 2 kW experiment.