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Condition Monitoring of Induction Motors Based on Stator Currents Demodulation

Elhoussin Elbouchikhi(1), Vincent Choqueuse(2), Mohamed Benbouzid(3*)

(1) ISEN Brest, FRE CNRS 3744 IRDL, France
(2) University of Brest, FRE CNRS 3744 IRDL, France
(3) University of Brest, FRE CNRS 3744 IRDL, France
(*) Corresponding author



Over the past several decades, induction machine condition monitoring have received increasing attention from researchers and engineers. Several induction machine faults detection techniques have been proposed that are based on vibration, temperature, and currents/power monitoring, etc. Motor current signature analysis is a cost-effective method, which has been widely investigated. Specifically, it has been demonstrated that mechanical and electrical induction machine faults can be effectively diagnosed using stator currents demodulation. Therefore, this paper proposes to investigate the use of demodulation techniques for bearing faults detection and diagnosis based on stator currents analysis. If stator currents are assumed to be mono-component signals, the demodulation techniques include the synchronous demodulator, the Hilbert transform, the Teager energy operator, the Concordia transform, the maximum likelihood approach and the principal component analysis. For a multi-component signal, further preprocessing techniques are required such as the Empirical Mode Decomposition(EMD) or the Ensemble EMD (EEMD).The studied demodulation techniques are demonstrated for bearing faults diagnosis using simulation data, issued from a coupled electromagnetic circuits approach-based simulation tool, and experiments on a 0.75kW induction machine test bed.
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Induction Machine; Bearing Faults; Diagnosis; Stator Currents Analysis; Demodulation Techniques

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