The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Speed Estimation of Induction Motor in Steady State Using the RSH

RSH를 이용한 정상상태 운전 유도전동기의 회전속도 추정

  • 양철오 (순천대학교 공대 전기공학과) ;
  • 박규남 (순천대학교 공대 전기제어공학과) ;
  • 송명현 (순천대학교 공대 전기제어공학과)
  • Received : 2011.06.02
  • Accepted : 2011.07.18
  • Published : 2011.09.01
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Abstract

The slip frequency is included in feature frequency for fault diagnosis of rotor bar, so rotating rotor speed is needed. In this study, rotor slot harmonic(RSH) method is suggested for speed estimation of induction motor. When the rotor is rotating, motor current signal include the harmonic signal of back-emf voltage related with number of rotor slot. So from the power spectrum of current signal, the rotor speed can be founded. This method of rotor speed estimation gives the slip frequency, and the feature frequency of rotor bar fault can be calculated. Comparing with stroboscope speed meter, the error rate of suggested method is less than 0.1[%].

Keywords

References

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