Analysis with 3D FEA of Partial Demagnetization for an IPM PMSG

The analysis of the variation on the machine's back EMF, is done and compared between different levels of partial demagnetization. The interior permanent magnet machine (IPM), has 4 poles designed to be asymmetric with the consequent pole approach. The results from the Finite Element Analysis (FEA) in 2D and 3D are compared to laboratory measurements with same conditions. Good agreement was found for the 3D FEA result's back EMF, making this approach suitable for fault detection and diagnosis studies.