Material optimization of ferromagnetic shields

Author

Borghi, Carlo A. ; Breschi, Marco ; Fabbri, Massimo ; Montanari, Ivan

Author_Institution

Dept. of Electr. Eng., Univ. of Bologna, Italy

Volume

39

Issue

3

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1317

Lastpage

1320

Abstract

This work reports the optimized design of a ferromagnetic shield for a 200-kJ superconducting magnetic energy storage (SMES) system under construction at the University of Bologna. Low weight and cost of the shield and a low stray field in the neighborhood of the device are required. In order to meet the design requirements a multiobjective minimization problem is solved. The main feature of the design procedure proposed is the direct introduction of the shield material as an optimization variable. This allows one to choose the cheapest and lightest material for the shield, together with the position and dimensions of the shield itself. The model for the analysis of the magnetic induction field is based on the boundary-element technique. The results obtained have been verified with a multidimensional finite-element-based analysis method.

Keywords

boundary-elements methods; ferromagnetic materials; finite element analysis; magnetic shielding; minimisation; superconducting magnet energy storage; 200 kJ; boundary element method; design optimization; ferromagnetic shield; magnetic induction field; material optimization; multidimensional finite element method; multiobjective minimization; passive shielding; stray field; superconducting magnetic energy storage system; Costs; Design optimization; Finite element methods; Magnetic analysis; Magnetic materials; Magnetic shielding; Multidimensional systems; Samarium; Superconducting magnetic energy storage; Superconducting materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.810549

Filename

1198463