Detecting Method for Broken Rotor Bar of Induction Motors by Flux Measurement

자속 측정을 통한 유도전동기의 회전자 바 손상 검출기법

  • 황돈하 (한국전기연구원 전력설비진단연구그룹) ;
  • 한상보 (한국전기연구원 전력설비진단연구그룹) ;
  • 강동식 (한국전기연구원 전력설비진단연구그룹) ;
  • 김병국 (동아대학교 전기공학과) ;
  • 김미정 (동아대학교 전기공학과) ;
  • 조윤현 (동아대학교 전기공학과)
  • Published : 2006.07.12

Abstract

This paper proposes a new method for detecting broken rotor bars in a squirrel-cage induction motor. The air-gap flux variation analysis was done using search coils inserted in stator slots when broken rotor bar occurs. An accurate modeling and analysis of air-gap flux variation in the induction motor are developed using finite-element(FE) software packages, and measurement of the flux are made using search coils. The simulation was done for the induction motor with 380 [V]. 7.5 [kW], 4 Poles, 1,760 [rpm] ratings using the commercial FE analysis tool. The simulation and experiment results can be useful for detecting the broken rotor bar of an induction motor.

Keywords