Proceedings of the KSR Conference (한국철도학회:학술대회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지

Deterioration Monitoring Device by Unbalance Current Measurement of Rotating Machines

불평형전류 측정에 의한 회전기 열화감시장치

  • 박찬용 (한국해양대학교 전기전자공학부 대학원) ;
  • 박대원 (한국해양대학교 전기전자공학부 대학원) ;
  • 류길수 (한국해양대학교 IT공학부) ;
  • 길경석 (한국해양대학교 전기전자공학부) ;
  • 이강원 (한국철도기술연구원 바이모달수송시스템연구단)
  • Published : 2008.06.12
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Abstract

This paper described an on-line condition monitoring device for rotating machines by measurement of unbalance current due to insulation deterioration. The device consists of a zero-phase current transformer (ZCT), a low-noise amplifying circuit, and a microprocessor unit. The prototype device measures current of $500\;{\mu}A\;{\sim}\;30\;mA$ in frequency ranges from 10 Hz to 3 kHz. An application experiment was carried out on 3-phase induction motors and we could measure current changes caused by a short-circuited turn.

Keywords