Demagnetization fault investigation in permanent magnet synchronous motor

Condition monitoring of electrical machines problems is essential for guaranteeing high motor performance, efficiency, and reliability. In this case the demagnetization fault detection in a permanent-magnet synchronous machine (PMSM) is investigated in this paper as a common fault. Demagnetization can be complete, or partial, on a certain region of the pole. Also it can be in form of symmetric or asymmetric. In this base, this paper presents a fault detection survey of PMSM under different types of demagnetization states. Finite element method (FEM) used for simulation and consideration of different fault states under fault mentioned.