A 30 kJ Bi2223 High Temperature Superconducting Magnet for SMES with Solid-Nitrogen Protection

Author

Wang, Qiuliang ; Dai, Yinming ; Song, Souseng ; Wen, Huaming ; Bai, Ye ; Yan, Luguang ; Kim, Keeman

Author_Institution

Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing

Volume

18

Issue

2

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

754

Lastpage

757

Abstract

A conduction-cooled high temperature superconducting (HTS) magnet system through a solid nitrogen protection with energy storage of 30 kJ was developed. The HTS magnet system is used to investigate fast discharging performances with a constant output voltage. The superconducting magnet consists of 14 double pancakes wound with Bi2223 tape with the length of 200 m. The magnet has an outer diameter of 212 mm and a clear bore of 108 mm. Cryostat for the HTS magnet system is designed and the coil is cooled with a GM cryocooler together with the solid nitrogen protection technology. The superconducting magnet is fabricated and tested. The operating current is about 155 A with raping rate of 5 A/s. It can generate a central magnetic field of 4.31 T at a temperature lower than 20 K. In this paper, the magnet design, coil fabrication and cryogenic system are presented. Experimental research of the superconducting magnet as a constant voltage power supply was carried out.

Keywords

bismuth compounds; calcium compounds; cryostats; high-temperature superconductors; lead compounds; nitrogen; strontium compounds; superconducting coils; superconducting magnet energy storage; superconducting magnets; superconducting tapes; Bi2223 tape; Bi_2-xPb_xSr₂Ca₂Cu₃O₁₀; GM cryocooler; HTS coil cooling; N; SME; conduction-cooled HTS magnet system; constant voltage power supply; cryogenic system; cryostat; energy 30 kJ; fast discharging performances; high temperature superconducting magnet design; magnetic flux density 4.31 T; size 200 m; size 212 mm; solid-nitrogen protection technology; superconducting magnetic energy storage technology; HTS coil; SMES; solid-nitrogen;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2008.922273

Filename

4523027