| 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 |
| DOI |
https://doi.org/10.6113/TKPE/2018.23.3.168 |
| 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. |