A technique of homogenization applied to the modelling of transformers

Author

De Rochebrune, A. ; Dedulle, J.M. ; Sabonnadiere, J.C.

Author_Institution

Lab. d´´Electrotech. de Grenoble, St. Martin d´´Heres, France

Volume

26

Issue

2

fYear

1990

fDate

3/1/1990 12:00:00 AM

Firstpage

520

Lastpage

523

Abstract

It is noted that the modelling of transformers by the finite-element method makes it necessary to consider the lamination of steels, whose thicknesses are very small compared to those of the transformers. In the present work, techniques of homogenization are used to solve Maxwell´s equations in stratified media such as cores. These methods are based on the substitution of a magnetically inhomogeneous structure by a simpler homogeneous equivalent one. The proposed approach leads to a macroscopic homogenized permeability tensor expressing the global properties of a laminated anisotropic material

Keywords

finite element analysis; magnetic cores; magnetostatics; steel; transformers; Maxwell´s equations; finite-element method; homogenisation technique; laminated anisotropic material; macroscopic homogenized permeability tensor; steel lamination; stratified media; transformer core; transformer modelling; Finite element methods; Lamination; Magnetic anisotropy; Magnetic cores; Maxwell equations; Nonhomogeneous media; Permeability; Perpendicular magnetic anisotropy; Steel; Transformer cores;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.106368

Filename

106368