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Elimination of broken rotor bars false indications in induction machines

Author

Listed:
  • Guellout, O.
  • Rezig, A.
  • Touati, S.
  • Djerdir, A.

Abstract

This work illustrates a method to detect and separate the broken rotor bars (BRBs) from load torque oscillations (LTOs) in motor’s line current signature. The LTOs (due to mechanical load condition abnormalities, load fluctuations like speed reduction couplings or a defective transmission) can introduce similar symptoms as the rotor cage breaks do. The proposed policy is based on the set of two rotating coordinates (same and inverse angular velocity as the current’s fundamental frequency ω) for the stator current vector, and its decomposition into positive and negative components. The extracted components of the positive sequence allow to separate the similar effects produced by rotor defects and the oscillating load . The detection and separation process is performed through the demodulation of the amplitude modulating signal due to BRBs and the phase modulating signal due to LTOs. An experimental test bench has been conducted to validate the simulation results and demonstrate the effectiveness of the proposed approach.

Suggested Citation

  • Guellout, O. & Rezig, A. & Touati, S. & Djerdir, A., 2020. "Elimination of broken rotor bars false indications in induction machines," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 167(C), pages 250-266.
    • Handle: RePEc:eee:matcom:v:167:y:2020:i:c:p:250-266
    DOI: 10.1016/j.matcom.2019.06.010
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    Cited by:

    1. Tomas Garcia-Calva & Daniel Morinigo-Sotelo & Vanessa Fernandez-Cavero & Rene Romero-Troncoso, 2022. "Early Detection of Faults in Induction Motors—A Review," Energies, MDPI, vol. 15(21), pages 1-18, October.

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