DocumentCode :
1313578
Title :
Stability and quench test results of the kA class conductor for a /spl mu/SMES coil
Author :
Ryu, K. ; Kim, H.J. ; Seong, K.C. ; Cho, J.W. ; Kwon, Y.K. ; Ryu, K.S. ; Choi, B.J.
Author_Institution :
Chonnam Nat. Univ., Kwangju, South Korea
Volume :
10
Issue :
1
fYear :
2000
fDate :
3/1/2000 12:00:00 AM
Firstpage :
828
Lastpage :
831
Abstract :
We are developing the small-sized superconducting magnetic energy storage (/spl mu/SMES) coil with the storage capability of 3 megajoules, which provides electric power with high quality to sensitive electric loads. As the initial step in fabrication of the /spl mu/SMES coil, a kA class conductor with a high copper to superconductor ratio was selected as a candidate conductor. The conductor was tested in two points of view, which are important in development of the stable /spl mu/SMES coil. First, the stabilities of the conductor against localized disturbances such as wire motions were measured by using a wire heater. Second, the quench current characteristics for different charge rates were also tested. The stability data showed that the short heat pulses made the conductor more unstable. The conductor had relatively high recovery currents ranging between 40% and 50% of its critical currents, compared with the conductors with a low copper ratio. The quench tests indicated that the quench currents of the conductor were independent of current ramp rates up to 3000 A/s and nearly equal to its critical current data.
Keywords :
critical current density (superconductivity); stability; superconducting coils; superconducting magnet energy storage; /spl mu/SMES coil; 3 MJ; charge rates; critical current data; critical currents; current ramp rates; high copper to superconductor ratio; high quality electric power; high recovery currents; low copper ratio; micro-SMES coil; quench current characteristics; quench currents; quench test; sensitive electric loads; short heat pulses; stability; storage capability; wire heater; wire motions; Conductors; Copper; Critical current; Energy storage; Fabrication; Stability; Superconducting coils; Superconducting magnetic energy storage; Testing; Wire;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.828359
Filename :
828359
Link To Document :
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