Fem Analysis of Angular Misalignment Fault in SRM Magnetostatic Characteristics

This paper proposes magnetostatic analysis of Switched Reluctance Motor (SRM) under angular misalignment fault to evaluate the performance of the motor under difierent operating conditions. In this analysis three-dimensional flnite element method (FEM) is used to simulate reliable and precise model by considering the complex motor magnetic geometry, end efiects, axial fringing efiects as well as nonlinear properties of the magnetic materials. The FE analysis is performed to obtain the static magnetic characteristics of SRM including ∞ux density, ∞ux linkages, terminal inductance and mutual inductance proflle under difierent rotor positions for difierent varying degree of faults. Consequently, it presents assessing the features of mutual inductance in inactive phases to study the variations of diagnosis index. The results obtained present useful information regarding the detection of fault and its direction as well as the amount of angular misalignment fault in the motor. To the best knowledge of the authors, such an analysis has not been carried out previously.