대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2000년도 추계학술대회 논문집 학회본부 A
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- Pages.243-245
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- 2000
인버터용 전해커페시터의 수명 추정
Life Estimation of Electrolytic Capacitors in Inverters
- 이동춘 (영남대학교 전자정보공학부)
- Lee, Dong-Choon (School of Electrical Engineering and Computer Science, Yeungnam University)
- 발행 : 2000.11.25
초록
In general, aluminum electrolytic capacitors are used in the DC link of PWM inverters fur ac motor drives. The capacitor usually has the shortest lifetime in the system and then determines the lifetime of the inverter system. In this paper, a method of capacitor lifetime estimation is proposed by using an ESR(equivalent series resistance) model and a heat transfer model of capacitor, from which internal operating temperature is estimated. Then, the lifetime is predicted by Arrhenius's equation. A practical example is presented.
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