Dynamic analysis modeling for reliability increase of IPM-type BLDCM and energy saving under Dynamic Eccentricity—Stator Inter-turn Fault Coupling

In this paper, we propose a modeling technique for the classification of the fault frequency components according to the fault state. Further, the optimal rotor design for an increase in reliability of an Interior Permanent Magnet type Brushless DC Motor (IPM type BLDCM) and a rise of the energy saving. For these improvements, fault states such as Dynamic Eccentricity Fault (DEF), Stator Inter-turn Fault (SITF), and their Coupling Faults (CFs) are modeled and analyzed using a nonlinear Finite Element Method (FEM) and Fast Fourier Transform (FFT).