Copertina di The FEM calculation of magnetic field in nonlinear anisotropic media
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The FEM calculation of magnetic field in nonlinear anisotropic media

LAP LAMBERT Academic Publishing (05.07.2013 )

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In the present work we study the modelling of quasi-stationary magnetic fields in nonlinear anisotropic media by FEM. The characteristics of soft ferromagnetic materials are thouroughly reviewed and eventually applied to the construction of a full 2D model of an anisotropic steel sheet. Some improvements in the construction in comparision to the ones previously published were achieved. We point out that the standard formulations and the subsequent theorems for the boundary value problems do not in fact correspond with the physical situation. Instead, we propose new formulations that reflect real physical properties of matter. General existence and uniqueness theorems for the obtained boundary value problems are proved as well as the convergence theorems for the discrete solutions. The conventional and full 2D model of an anisotropic steel sheet are compared in two transformer core models using the adaptive Newton-Raphson iterative scheme. The obtained results are then presented with comments. This work also points out the steps needed for the construction of a 3D model of steel-dielectric laminations that was not yet elaborated.
Casa editrice:
LAP LAMBERT Academic Publishing
Sito Web:
Da (autore):
Zdeněk Kunický
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Pubblicato il:
Giacenza di magazzino:
Elettricità, magnetismo, ottica
61,90 €
Parole chiave:
FEM, Transformer, reluctivity, magnetic, Anisotropic

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