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Eccentricity Faults Diagnosis in Permanent Magnet Synchronous Motors: a Finite Element-Based Approach

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This paper addresses the effects of permanent magnet synchronous motor (PMSM) eccentricity faults on the induced normal magnetic field, flux density, and electromotive forces (EMFs). A 2D finite element method (FEM) is needed for PMSM modeling and three kind of eccentricity faults are considered; static, dynamic, and mixed eccentricities. The achieved simulation results allow distinguishing the three types of eccentricity based on the EMF power spectral density (PSD) computation. The highlighted fault characteristics allow carrying out detection and diagnosis. Sideband components amplitude extracted from the EMF PSD are proposed as faults index, allowing the three considered eccentricity faults to be both detected and distinguished.
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Diagnosis; Rotor Eccentricity; Static Eccentricity; Dynamic Eccentricity; Mixed Eccentricity; Permanent Magnet Synchronous Motor

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