Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on the Reliability Prediction and Lifetime of the Electrolytic Condenser for EMU Inverter

전동차 인버터 구동용 전해콘덴서의 신뢰도예측과 수명 연구

  • Han, Jae-Hyun (Seoul National University of Science and Technology Gradnate School of Railroad) ;
  • Bae, Chang-Han (Korea Railroad Research Institute) ;
  • Koo, Jeong-Seo (Seoul National University of Science and Technology Gradnate School of Railroad)
  • 한재현 (서울과학기술대학교 철도전문대학원) ;
  • 배창한 (한국철도기술연구원) ;
  • 구정서 (서울과학기술대학교 철도전문대학원)
  • Received : 2013.10.23
  • Accepted : 2014.02.03
  • Published : 2014.02.28
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Abstract

Inverter module, which feeds the converted power to the traction motor for EMU. Consists of the power semiconductors with their gate drive unit(GDU)s and the control computer for driving, voltage, current and speed controls. Electrolytic condenser, connected to the gate drive unit and a core component to drive the power semiconductor, has problems such as reduction in lifetime and malfunction caused by electrical and mechanical characteristic changes from heat generation during high speed switching for generation of stable power. In this study, To check the service life of electrolytic condenser, the test was carried out in two ways. First, In the case of accelerated life testing of condenser, the Arrhenius model is a way of life testing. Another way is to analyze the reliability of the failure data by the method of parametric data analysis. Eventually, life time by accelerated life test than a method of failure data analysis(Weibull distribution) was found to be slightly larger output.

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References

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