eddy currents; finite element methods; homogenization; lamination stack
Abstract :
[en] This paper deals with the time-domain homogenization of laminated cores in 2D or 3D finite element (FE) models of electromagnetic devices, in particular allowing for net circulating current in the laminations (which may result from imperfect or damaged insulation). The homogenization is based on the decomposition of the variation of the induction in the lamination thickness by means of a orthogonal set of polynomial basis functions, in conjunction with the magnetic vector potential (MVP) formulation. The conventional even skin-effect basis functions are linked to net flux, whereas the odd ones are now added so as to allow for net current. The approach is validated through a simple linear 2D test case, although the extension to 3D nonlinear problems is straightforward.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Gyselinck, Johan
Dular, Patrick ; Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Krähenbühl, Laurent
Sabariego, Ruth Vazquez
Language :
English
Title :
Time-domain finite-element homogenisation of laminated iron cores with net circulating currents
Publication date :
June 2015
Event name :
COMPUMAG 2015 (20th Conference on the Computation of Electromagnetic Fields)