Effect of Permanent Magnet Segmentation Structure on Eddy Current Loss of Permanent Magnet Synchronous Motor

Abstract

For this essay, the mechanism of cutting a magnet to reduce its loss is investigated using the equivalent circuit of magnet segmentation, and the method is verified by the finite element method. The results indicate that the segmentation of magnets can effectively reduce the eddy current loss of magnets. The larger the product of segmented lengths is, the smaller the eddy current loss is. The higher the number of segments is, the lower of loss value is. The rotational speed and eddy current loss are in the square. Load multiple and eddy current loss is in cubic growth.