전동차 인버터 구동용 전해콘덴서의 신뢰도예측과 수명 연구

초록

Inverter module, which feeds the converted power to the traction motor for EMU. Consists of the power semiconductors with theirgate drive unit(GDU)s and the control computer for driving, voltage, current and speed controls. Electrolytic condenser, connected to the gatedrive unit and a core component to drive the power semiconductor, has problems such as reduction in lifetime and malfunction caused byelectrical 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 lifetesting 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 ofparametric data analysis. Eventually, life time by accelerated life test than a method of failure data analysis(Weibull distribution) was found tobe slightly larger output

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