Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지

Capacitance Estimation of DC-Link Capacitors of Three-phase AC/DC/AC PWM Converters

3상 AC/DC/AC PWM 컨버터의 DC-Link 커패시터 용량 추정

  • Lee Kang-Ju (School of Electrical Engineering and Computer Science, Yeungnam University) ;
  • Lee Dong-Choon (School of Electrical Engineering and Computer Science, Yeungnam University) ;
  • Seok Jul-Ki (School of Electrical Engineering and Computer Science, Yeungnam University)
  • 이강주 (영남대학교 전자정보공학부) ;
  • 이동춘 (영남대학교 전자정보공학부) ;
  • 석줄기 (영남대학교 전자정보공학부)
  • Published : 2002.07.01
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Abstract

In this paper, the novel method is proposed to measure the capacitance of the dc link capacitor Advantage of the method is not to separate capacitor from 3-phase AC/DC/AC converters. In the proposed method, a specific low frequency current is injected to oscillate the voltage of dc capacitor at no load condition. The capacitance of dc capacitor is calculated with the effective values of this ripple voltage and current. The validity of the proposed method is confirmed by PSIM simulation.

Keywords