Numerical modelling of anisotropy and eddy current effects in ferromagnetic laminations using a co-energy formulation
✍ Scribed by L. R. Dupré; R. Van Keer; J. A. A. Melkebeek
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 214 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0894-3370
- DOI
- 10.1002/jnm.423
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✦ Synopsis
Abstract
The paper deals with a numerical model for the evaluation of electromagnetic fields in one steel lamination under the influence of a rotating magnetic flux, taking into account anisotropy effects. For this purpose a detailed material model, described by a differential permeability tensor, is included in the macroscopic electromagnetic field calculations in one lamination. Here, by geometrical and physical considerations, the governing Maxwell equations are reduced to a system of parabolic PDEs for the components of the magnetic field vector, under appropriate boundary and initial conditions. We present a suitable numerical approximation based upon a finite element–finite difference method, which properly takes into account the material characteristics. The study leads to a more realistic numerical modelling of the electromagnetic phenomena inside electric and magnetic conducting laminations due to anisotropy effects. Numerical results are compared with those from simplified analytical formulae. Copyright © 2001 John Wiley & Sons, Ltd.