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Single Phase PWM Converter For High-Speed Railway Propulsion System Using Discontinuous PWM

불연속 변조 기법을 이용한 고속철도 추진제어장치용 단상 PWM 컨버터

  • Song, Min-Sup (Technical Standard Team, Korea Railroad Research Institute)
  • Received : 2017.05.22
  • Accepted : 2017.07.05
  • Published : 2017.08.31

Abstract

In this paper, for high speed railway propulsion systems, a single phase PWM Converter using discontinuous PWM (DPWM) was investigated. The conventional PWM Converter uses a low frequency modulation index of less than 10 to reduce switching losses due to high power characteristics, which results in low control frequency bandwidth and requires an additional compensation method. To solve these problems, the DPWM method, which is commonly used in three phase PWM Inverters, was adopted to a single phase PWM Converter. The proposed method was easily implemented using offset voltage techniques. Method can improve the control performance by doubling the frequency modulation index for the same switching loss, and can also bring the same dynamic characteristics among switches. Proposed DPWM method was verified by simulation of 100 kW PWM converter.

Acknowledgement

Supported by : 한국철도기술연구원

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