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http://dx.doi.org/10.7782/JKSR.2017.20.4.448

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

Song, Min-Sup (Technical Standard Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.20, no.4, 2017 , pp. 448-457 More about this Journal
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.
Keywords
High speed railway propulsion system; PWM Converter; DPWM;
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Times Cited By KSCI : 2  (Citation Analysis)
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