Abstract
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.
| Original language | English |
|---|---|
| Article number | 7833112 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 27 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Jun 2017 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
AC Loss Properties of Stacked REBCO Superconducting Tapes. / Ueno, Tatsuhito; Iwakuma, Masataka; Ito, T.; Yun, Kiwook; Adachi, Kazuhisa; Tomioka, Akira; Hase, Y.; Konno, Msayuki; Izumi, Teruo; Machi, Takato; Ibi, Akira.
In: IEEE Transactions on Applied Superconductivity, Vol. 27, No. 4, 7833112, 06.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - AC Loss Properties of Stacked REBCO Superconducting Tapes
AU - Ueno, Tatsuhito
AU - Iwakuma, Masataka
AU - Ito, T.
AU - Yun, Kiwook
AU - Adachi, Kazuhisa
AU - Tomioka, Akira
AU - Hase, Y.
AU - Konno, Msayuki
AU - Izumi, Teruo
AU - Machi, Takato
AU - Ibi, Akira
PY - 2017/6
Y1 - 2017/6
N2 - 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.
AB - 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.
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U2 - 10.1109/TASC.2017.2658118
DO - 10.1109/TASC.2017.2658118
M3 - Article
AN - SCOPUS:85015010590
VL - 27
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 4
M1 - 7833112
ER -