Affiliations: [a] Electrical Engineering Department, University of
Jijel, Jijel, Algeria
Correspondence:
[*]
Corresponding author: Zoubida Belli, Electrical Engineering
Department, University of Jijel, Jijel, Algeria. E-mail: bellizoubida@yahoo.fr
Abstract: The aim of this study is to analyze and investigate some techniques
to reduce eddy current losses in permanent magnets. First, a model using
Maxwell's equations to analyze eddy current in permanent magnets is presented.
Second, the effect of magnet circumferential segmentation on the eddy current
losses in case of a surface mounted permanent magnets synchronous machine is
investigated. A simple analysis of magnet demagnetization due to its eddy
current losses is also studied. In a third step, second technique for reducing
eddy current losses is presented. It relates to the stator slots skew, where
the best skewing angle is obtained by means of an optimization process using
genetic algorithm. A 2D nonlinear finite elements code is developed to achieve
the purposes of the presented work.
Keywords: Permanent magnet, eddy current analysis, dynamic losses reduction, finite elements magnetic field computation, magnet segmentation, magnet demagnetization, stator slots skew, genetic algorithm
