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Induction Motor Faults Diagnosis when Considering Bars Skew and Saturation Effects


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DOI: https://doi.org/10.15866/irecon.v7i1.15549

Abstract


The objective of the work presented in this paper is the diagnosis of the three-phase induction machine with secondary effects such as the rotor bars skewing and the saturation phenomenon. To enable reliable diagnosis of an induction machine, a mathematical model is required to simulate the machine behavior. Among the existing mathematical models, the approach of the winding function is the most promising because it takes into account the actual distribution of the windings in the stator slots. Nevertheless, the major drawback of this model is the non-consideration of the skewing effect of the bars and the non-linear evolution of the FMM between the ends of the slots. The aim of this paper is to use the modified winding function approach (MWFA) with 2D extension to take into account the rotor bars skewing and saturation effects in the presence of faults such as the rotor broken bars, the short-circuit between stator turns and the eccentricity. A series of simulations is conducted to study the spectral contents of the stator current of the induction squirrel cage motor in the various operating cases.
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Keywords


Induction Motor; Bars Skewing; Saturation; Diagnosis; Stator Fault; Rotor Fault; Modified Winding Function; Spectral Analysis

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References


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