[en] The authors propose a novel time-domain extension of the well-known frequency-domain surface-impedance method in computational magnetodynamics. Herein, the 1-D eddy-current problem in a massive conducting region (semi-infinite slab) is considered via a number of exponentially decreasing trigonometric basis functions that cover the relevant skin-depth (or frequency) range of the application at hand. The method is elaborated for the 3-D magnetic-vector-potential formulation and is applied to a simple 2-D test case. Results are shown to converge well to those obtained with an accurate brute-force finite-element (FE) model.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Gyselinck, Johan; Université Libre de Bruxelles - ULB > BEAMS
Geuzaine, Christophe ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Dular, Patrick ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
V Sabariego, Ruth ; Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Language :
English
Title :
Surface-impedance boundary conditions in time-domain finite-element calculations
S. Barmada, L. Di Rienzo, N. Ida, and S. Yuferev, "The use of surface impedance boundary conditions in time domain problems: Numerical and experimental validation," ACES J., vol. 19, pp. 76-83, Jul. 2004.
L. Krähenbühl, O. Fabrègue, S. Wanser, M. De Sousa Dias, and A. Nicolas, "Surface impedances, BIEM and FEM coupled with 1-D non linear solutions to solve 3-D high frequency eddy current problems," IEEE Trans. Magn., vol. 33, no. 2, pp. 1167-1172, Mar. 1997.
K. R. Davey and L. Turner, "Transient eddy current analysis for generalized structures using surface impedances and the fast Fourier transform," IEEE Trans. Magn., vol. 26, no. 3, pp. 1164-1170, May 1990.
D. Rodger and H. C. Lai, "A surface impedance method for 3-D time transient problems," IEEE Trans. Magn., vol. 35, no. 3, pp. 1369-1371, May 1999.
A. Bossavit, "A rationale for edge-elements in 3-D fields computations," IEEE Trans. Magn., vol. 24, no. 1, pp. 74-79, Jan. 1988.