Stability of large composite superconductors

Author

Huang, X. ; Eyssa, Y.M.

Author_Institution

Appl. Superconductivity Center, Wisconsin Univ., Madison, WI, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2304

Lastpage

2307

Abstract

High-current large composite conductors cooled in He II baths are planned for superconductive magnetic energy storage (SMES) systems. Such conductors have long time constant current diffusion causing high initial I²R generation when driven normal. As a result, the front of a normal zone may propagate even though the back of the normal zone is recovering as current diffuses deeper (with less I²R) into the stabilizer. Accurate knowledge of I²R heat generation in the current sharing region and the time-dependent transient heat transfer to helium is determined for the stability analysis. Analytical and numerical procedures are developed to calculate the maximum nonpropagating currents and propagation velocities. Round and rectangular shaped conductors are considered via the computational model. Numerical results are compared with experimental data

Keywords

composite superconductors; heat transfer; superconducting magnet energy storage; I²R heat generation; SMES; computational model; current sharing region; large composite superconductors; maximum nonpropagating currents; normal zone; propagation velocities; stability analysis; stabilizer; superconductive magnetic energy storage; time constant; time-dependent transient heat transfer; Computational modeling; Conductors; Energy storage; Heat transfer; Helium; Samarium; Stability analysis; Superconducting magnetic energy storage; Superconductivity; Transient analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133678

Filename

133678