Diagnosis of Induction Motor Faults Using Inverter Input Current Analysis

인버터 입력전류 분석을 이용한 유도전동기 고장진단

  • Han, Jungho (Department of Railway Electrical and Signaling Engineering, Seoul National University of Science and Technology) ;
  • Song, Joong-Ho (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Choi, Kyu-Hyoung (Department of Railway Electrical and Signaling Engineering, Seoul National University of Science and Technology)
  • 한정호 (서울과학기술대학교 철도전기신호공학과) ;
  • 송중호 (서울과학기술대학교 전기정보공학과) ;
  • 최규형 (서울과학기술대학교 철도전기신호공학과)
  • Received : 2016.06.03
  • Accepted : 2016.07.07
  • Published : 2016.07.31


It is well known that since abrupt faults in induction motors tend to lead to subsequent faults and deterioration of the drive apparatus, motor faults may lead to several operating restrictions, such as security problems and economic loss. A lot of research has been done in the area of diagnosis to detect machine faults and to prevent catastrophic hazards in the motor drive system. This paper presents a new method of motor current signature analysis in which the DC-link current of the inverter-driven induction motor system, where a single current sensor is employed instead of three AC current sensors, is measured, and fast Fourier transform analysis is performed. This proposed method makes it possible to easily discern and clearly separate the motor fault current signature from the normal operation current flowing through the stator and rotor windings.


Grant : 상태기반 스마트 유지보수 핵심기술 개발 연구

Supported by : 국토교통과학기술진흥원


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