Development of low-AC-loss Bi-2223 superconducting multifilamentary wires

Kazuo Funaki, Yuji Sasasige, Haruo Yanagida, Satoshi Yamasaki, Masataka Iwakuma, Naoki Ayai, Tomonobu Ishida, Yusuke Fukumoto, Hiroki Kamijo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have been designing and developing advanced Ag-sheathed Bi-2223 multifilamentary wires for the future applications to superconducting transformers of electric rolling stocks. Trial wires were twisted without remarkable degradation in the transport property for suppressing AC losses in a perpendicular magnetic field configuration. The AC losses were measured by a saddle-shaped pickup coil in a wide range of frequency up to a commercial frequency. The experimental results show that the AC loss per cycle has linear frequency dependence in a region of the practical amplitude of AC magnetic field for the transformers, where the excess loss may come from an electromagnetic coupling between the filaments. The hysteresis loss evaluated as a low frequency limit of the AC loss was also reduced with the decrease in the twist pitch, which may be considered as a similar effect to the so-called "twist effect" observed in in- situ Nb 3 Sn wires.

Original languageEnglish
Article number5153246
Pages (from-to)3053-3056
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume19
Issue number3
DOIs
Publication statusPublished - Jun 1 2009

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Superconducting wire
alternating current
wire
Wire
transformers
Magnetic fields
Electromagnetic coupling
electromagnetic coupling
magnetic field configurations
Pickups
saddles
Transport properties
Hysteresis
filaments
coils
transport properties
hysteresis
degradation
low frequencies
Degradation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Funaki, K., Sasasige, Y., Yanagida, H., Yamasaki, S., Iwakuma, M., Ayai, N., ... Kamijo, H. (2009). Development of low-AC-loss Bi-2223 superconducting multifilamentary wires. IEEE Transactions on Applied Superconductivity, 19(3), 3053-3056. [5153246]. https://doi.org/10.1109/TASC.2009.2018244

Development of low-AC-loss Bi-2223 superconducting multifilamentary wires. / Funaki, Kazuo; Sasasige, Yuji; Yanagida, Haruo; Yamasaki, Satoshi; Iwakuma, Masataka; Ayai, Naoki; Ishida, Tomonobu; Fukumoto, Yusuke; Kamijo, Hiroki.

In: IEEE Transactions on Applied Superconductivity, Vol. 19, No. 3, 5153246, 01.06.2009, p. 3053-3056.

Research output: Contribution to journalArticle

Funaki, K, Sasasige, Y, Yanagida, H, Yamasaki, S, Iwakuma, M, Ayai, N, Ishida, T, Fukumoto, Y & Kamijo, H 2009, 'Development of low-AC-loss Bi-2223 superconducting multifilamentary wires', IEEE Transactions on Applied Superconductivity, vol. 19, no. 3, 5153246, pp. 3053-3056. https://doi.org/10.1109/TASC.2009.2018244
Funaki, Kazuo ; Sasasige, Yuji ; Yanagida, Haruo ; Yamasaki, Satoshi ; Iwakuma, Masataka ; Ayai, Naoki ; Ishida, Tomonobu ; Fukumoto, Yusuke ; Kamijo, Hiroki. / Development of low-AC-loss Bi-2223 superconducting multifilamentary wires. In: IEEE Transactions on Applied Superconductivity. 2009 ; Vol. 19, No. 3. pp. 3053-3056.
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