Edge element computations of eddy currents in laminated materials

We studied different types of edge elements in three-dimensional computations of power dissipation in laminated conductors. The standard, lowest order (mixed first and zeroth order) basis on tetrahedral grids produces inaccurate results and grossly overestimates the losses. However, on hexahedral gr...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-05, Vol.39 (3), p.1758-1765
Main Authors: Yueqiang Liu, Bondeson, A., Bergstrom, R., Larson, M.G., Samuelsson, K.
Format: Article
Language:English
Subjects:
Alignment
Anisotropic magnetoresistance
Applied classical electromagnetism
Bonding
Computation
Conducting materials
Conductors
Degrees of freedom
Dissipation
Eddy currents
Electric potential
Electromagnetism
electron and ion optics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lamination
Magnetic anisotropy
Magnetism
Magnetostatics
magnetic shielding, magnetic induction, boundary-value problems
Mathematical analysis
Mathematics
Perpendicular magnetic anisotropy
Physics
Power dissipation
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Summary:We studied different types of edge elements in three-dimensional computations of power dissipation in laminated conductors. The standard, lowest order (mixed first and zeroth order) basis on tetrahedral grids produces inaccurate results and grossly overestimates the losses. However, on hexahedral grids, aligned with the laminations, the standard edge elements give much more accurate results. If the grid cannot be aligned with the laminations, the dissipation can still be accurately computed with the lowest order hexahedral elements by using midpoint integration. Tetrahedral grids give accurate results if the complete first order basis is included, but this doubles the number of degrees of freedom.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.809843