PROJECT TITLE :
An Online Method for Static Eccentricity Fault Detection in Axial Flux Machines
This paper investigates a completely unique on-line technique for static eccentricity (SE) fault detection of single-stator-single-rotor axial flux permanent-magnet (AFPM) machines. The method permits for both estimating the SE factor and computing the minimum air-gap position. As direct flux measurements are expensive, the proposed method for fault detection is predicated on the measurement of the voltages of three search coils uniformly distributed in the air gap. Unlike the present spectrum-based fault detection ways on which the winding configuration encompasses a considerable impact, the proposed method can be used for any kind of AFPM machine independently on the winding layout. A simplified a pair of-D analytical approach is used. Moreover, a circuit-coupled 3-D finite-part methodology (FEM) was used to compute the induced voltages within the search coils and show the validity of the strategy through twenty eccentric scenarios. Moreover, an experimental setup was built to validate the analytical approach and to confirm the results achieved with the three-D FEM. Many experimental measurements are done. All measurements confirm the accuracy of the proposed technique. It is additionally shown that the method yields accurate results under any load condition.
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