Detection of Eccentricity in Squirrel Cage Induction Motors by Finite Element Method


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Abstract


Finite Element method is used in this research work to detect eccentricity fault in squirrel cage induction motors. This paper is about the results obtained from the simulation part of the research on a real size motor. The simulation was done using FLUX software, which can solve the magnetizing partial differential equations of the rotor, stator and the air-gap by FEMM. In the primary stage of this research the focus is on two dimension mapping of the electromagnetic field of the motor by using FLUX-2D. The presented results in this paper show the effect of the eccentricity is traceable from the FEMM of the motor. At the later part of this paper, the results from the simulation part were tested against the analytical method for validation.  In the analytical method the present research was concentrated on the stator current and sees how the original sinusoidal current signal is distorted after fault. At the final part of the paper a complete FFT analysis of the current and voltage were presented for two cases of static and dynamic eccentricity faults. The paper is concluded by showing the effectiveness of this research for eccentricity fault diagnoses.
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Keywords


Finite Element; Spectral Analysis of Current Signal; Eccentricity Fault Detection; Induction Motor

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References


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