Instability in kiloamp class a.c. superconducting cables

K. Funaki, M. Nakashima, Masataka Iwakuma, M. Takeo, K. Yamafuji

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In kiloamp (kA) class superconducting cables for a.c. use, where each strand does not have an insulation layer, the quench current in 60 Hz operation was found to be no more than 50% of the d.c. critical current, even on the load line. The degradation in the 60 Hz quench current of the kA class cables is discussed with respect to: 1, an a.c. instability in the multifilamentary wire; 2, magnetic coupling among strands in concentric multistrand cables; 3, the influence of local disorder in cabling on current distribution; and 4, the temperature rise due to steady a.c. losses. While points 2 and 3 induce non-uniform current distribution, points 1 and 4 were found to be factors in the reduction of quench current in the strands with higher current density. Some local overheatings may also contribute to the intense degradation.

Original languageEnglish
Pages (from-to)594-597
Number of pages4
JournalCryogenics
Volume31
Issue number7
DOIs
Publication statusPublished - Jan 1 1991

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Superconducting cables
strands
cables
current distribution
Degradation
Magnetic couplings
Coaxial cables
Critical currents
degradation
Insulation
Cables
Current density
Wire
insulation
high current
critical current
wire
disorders
current density
Temperature

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Instability in kiloamp class a.c. superconducting cables. / Funaki, K.; Nakashima, M.; Iwakuma, Masataka; Takeo, M.; Yamafuji, K.

In: Cryogenics, Vol. 31, No. 7, 01.01.1991, p. 594-597.

Research output: Contribution to journalArticle

Funaki, K, Nakashima, M, Iwakuma, M, Takeo, M & Yamafuji, K 1991, 'Instability in kiloamp class a.c. superconducting cables', Cryogenics, vol. 31, no. 7, pp. 594-597. https://doi.org/10.1016/0011-2275(91)90055-2
Funaki, K. ; Nakashima, M. ; Iwakuma, Masataka ; Takeo, M. ; Yamafuji, K. / Instability in kiloamp class a.c. superconducting cables. In: Cryogenics. 1991 ; Vol. 31, No. 7. pp. 594-597.
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