The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Study on the Auxiliary Power Supply for the Railway Vehicle by Using Wide Band Gap Device

Wide Band Gap 소자를 적용한 철도차량용 보조전원장치에 관한 연구

  • Choi, Yeon-Woo (Dept. of Control and Instrumentation Eng., Hanbat National University) ;
  • Lee, Byoung-Hee (Dept. of Electronics & Control Eng., Hanbat National University)
  • Received : 2018.01.23
  • Accepted : 2018.03.14
  • Published : 2018.06.20
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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.

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References

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