DocumentCode :
39188
Title :
Development of Large-Scale Racetrack Coil Wound With REBCO-Coated Conductors
Author :
Iwai, S. ; Miyazaki, H. ; Tosaka, T. ; Tasaki, K. ; Ishii, Y.
Author_Institution :
Toshiba Corp., Yokohama, Japan
Volume :
24
Issue :
3
fYear :
2014
fDate :
Jun-14
Firstpage :
1
Lastpage :
5
Abstract :
A newly designed racetrack coil wound with REBCO-coated conductor was developed and demonstrated. The coil shape was improved to achieve consistent dimensional accuracy, and the winding structure was improved to prevent degradation in the epoxy-impregnated windings. The wire length of the fabricated large-scale coils was 574 m, and the overall size was 434 mm × 796 mm. This wire length was longer than that of any of the coils the authors fabricated previously. The outer radiuses in both the semicircular sections and the pseudo-straight sections, which had a slight curvature, were approximately the same in the two coils, to within 1 mm, indicating that good dimensional accuracy was obtained consistently. Furthermore, the n-value was sufficiently high at 24 in an electric field range from 10- 9 to 10- 7 V/cm at 77 K, which indicates that the coils had no damaged area in the windings.
Keywords :
barium compounds; high-temperature superconductors; resins; superconducting coils; windings; REBCO-coated conductors; coil shape; electric field; epoxy-impregnated windings; large-scale racetrack coil development; outer radiuses; overall size; pseudostraight sections; semicircular sections; size 574 m; temperature 77 K; winding structure; wire length; Accuracy; Coils; Conductors; Degradation; Magnetic fields; Shape; Windings; Conduction-cooling; REBCO-coated conductor; impregnation; racetrack coil;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2013.2284422
Filename :
6620965
Link To Document :
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