This paper studies static eccentricity fault detection in Axial Flux Permanent Magnet Machines (AFPMM) using three-dimensional Finite-Element Analysis (3D-FEA). Use of numerical modeling makes it possible to precisely study the eccentricity fault detection in these types of machines. The simulations are validated using experimental measurements. To the best knowledge of the authors, static eccentricity fault detection in AFPM has not been studied before. Hence, a new definition for the static eccentricity factor (SEF) is presented in these types of machines. A motor with different degrees of rotor eccentricity is simulated and back-EMF of all coils of stator is obtained. In addition, an appropriate criterion has been presented for the fault detection using the back-EMF of coils. This study indicates that back-EMF of coils of stator is a good criterion for eccentricity fault detection. It is observed that the unbalanced back-EMF suggests a method for the indirect measurement of eccentricity that could be carried out during manufacturing and assembling process or maintenance operation.

Static Eccentricity Fault Detection in Single Stator-Single Rotor Axial Flux Permanent Magnet Machines

MARIGNETTI, Fabrizio;
2012

Abstract

This paper studies static eccentricity fault detection in Axial Flux Permanent Magnet Machines (AFPMM) using three-dimensional Finite-Element Analysis (3D-FEA). Use of numerical modeling makes it possible to precisely study the eccentricity fault detection in these types of machines. The simulations are validated using experimental measurements. To the best knowledge of the authors, static eccentricity fault detection in AFPM has not been studied before. Hence, a new definition for the static eccentricity factor (SEF) is presented in these types of machines. A motor with different degrees of rotor eccentricity is simulated and back-EMF of all coils of stator is obtained. In addition, an appropriate criterion has been presented for the fault detection using the back-EMF of coils. This study indicates that back-EMF of coils of stator is a good criterion for eccentricity fault detection. It is observed that the unbalanced back-EMF suggests a method for the indirect measurement of eccentricity that could be carried out during manufacturing and assembling process or maintenance operation.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11580/23434
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