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This paper investigates the effect of laser cutting the stator lamination on the performance of a permanent magnet assisted synchronous reluctance machine (PMA SynRM). A technique for the modeling of the $B$ –$H$ curves of electrical steel laminations is described. It considers the extent of degradation of the magnetic properties caused by laser cutting, reported in the literature, and assumes...
The paper describes a number of computationally efficient techniques for predicting rotor eddy current loss in permanent-magnet brushless machines. In particular, a correction factor which takes into account the finite length effect of magnets is employed to adjust analytically predicted losses for each harmonic. The results are compared with 3-dimensional (3D) finite element (FE) calculations. A...
This paper compares the performance and material costs of two candidate tubular permanent magnet topologies, viz., quasi-Halbach magnetized moving magnet and flux switching (moving-iron) machines for applications in active vehicle suspension. Both machines are optimally designed for the same operating conditions and under the same volumetric and thermal constraints. It is shown that while the flux...
In this paper two different concentrated coil configurations for radial flux air-cored permanent magnet (RFAPM) machines are analysed and evaluated against a RFAPM machine that utilises overlapping coils. The comparative analysis of the different machines are done analytically. The analytical results are compared with finite element analysis results of simplified linearised equivalent models for the...
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