Abstract
This paper proposes a computationally efficient method, for accurate prediction of 3-dimensional (3D) rotor eddy current loss in permanent magnet (PM) machines. 2D time stepped finite element analysis (FEA) is used to generate the information on radial and tangential time-derivatives of 2D magnetic field (eddy current sources) in the magnets and the retaining sleeve for application of the 3D imaging technique. The proposed method is employed to evaluate the 3D magnet loss associated with surface mounted PM (SPM) machine, interior PM (IPM) machine and also the eddy current loss in the retaining sleeve. The method is validated by 3D time-stepped finite element analysis (FEA) for an 8-pole, 18-slot SPM and IPM machines.
Published Version
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