Power-law characteristic for 3-D macroscopic modeling of superconductors via an integral formulation

Author

Rubinacci, Guglielmo ; Villone, Fabio ; Zamboni, Walter

Author_Institution

Univ. di Cassino, Italy

Volume

40

Issue

2

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

900

Lastpage

903

Abstract

In this paper, we solve the eddy-current problem in presence of superconductors in three-dimensional geometries, fed through electrodes and possibly carrying transport current. An integral formulation of the electromagnetic part of the problem is complemented by a variational form of the macroscopic constitutive relationship of a superconductor, obtained by the use of a suitable power-law characteristic. This formulation allows us to solve the problem as an unconstrained minimization of a functional that is convex under suitable assumptions.

Keywords

eddy currents; electrodes; integral equations; minimisation; superconductivity; 3-D macroscopic modeling; eddy-current; edge elements; electrodes; integral equations; integral formulation; macroscopic constitutive relationship; power-law characteristic; superconductors; three-dimensional geometries; transport current; unconstrained minimization; Bean model; Geometry; Helium; Minimization; Numerical models; Solid modeling; Superconducting cables; Superconducting magnets; Superconducting materials; Superconductivity;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.824538

Filename

1284560