AC Loss Properties of Stacked REBCO Superconducting Tapes

Tatsuhito Ueno, Masataka Iwakuma, T. Ito, Kiwook Yun, Kazuhisa Adachi, Akira Tomioka, Y. Hase, Msayuki Konno, Teruo Izumi, Takato Machi, Akira Ibi

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)


REBCO superconducting tapes have excellent critical current properties even at high temperature and high magnetic field. Many projects for the research and development of superconducting machines and devices with REBCO tapes are in progress worldwide. The important problem to realize them is the ac loss reduction of REBCO superconducting tapes since the most part of thermal load of cryocoolers is the ac loss. The evaluation of the induced ac loss in the windings is also quite important to design the superconducting system, especially the cooling system. In this study, we investigated the applicability of the scaling law to the stacked tapes using the currently fabricated REBCO superconducting tapes. We defined the number of stacked tapes as n, and the temperature as T. The ac loss for Bm < Bpe decreased with increasing n due to the influence of diamagnetic field, whereas the ac losses for Bmgt; Bpe agreed with each other regardless of n. By defining Ic around zero field at the respective temperature, in the respective number of stacked tapes as Ic0(T, n), Ic-B normalized by using Ic0(T, n). The normalized Ic-B curves coincided with one master curve for every n regardless of T. The normalized M-H curves and ac loss curves against the field amplitude by using Ic0(T, n) also coincided with one master curves for every n regardless of T. It was verified that the scaling law of M and ac loss was available even if the REBCO tapes stacked into multilayers.

ジャーナルIEEE Transactions on Applied Superconductivity
出版ステータス出版済み - 6月 2017

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学


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