TY - JOUR
T1 - Characteristics of AC transport current losses in YBCO coated conductors and their dependence on distributions of critical current density in the conductors
AU - Miyagi, Daisuke
AU - Tsukamoto, Osami
N1 - Funding Information:
Manuscript received September 24, 2001. This work was supported in part by Grant-in Aid for Basic Research (A), the Ministry of Education, Culture, Sports, Science and Technology, Japan. A part of this work was supported through International Superconductivity Technology Center (ISTEC) by the NEW Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.
PY - 2002/3
Y1 - 2002/3
N2 - We measured AC transport current losses in two kinds of thin film YBCO coated conductors with different critical current densities. The results show that the loss characteristics do not follow the Norris strip model. The loss in one of the samples follows the Norris elliptical model and the loss data of the other sample fall in between the elliptical and strips models. It is considered that the loss in a YBCO conductor of high quality, that is, high critical current density, follows the strip model. However, the measured losses of even high critical current density conductor (Jc ≈ 106 A/cm2) does not follow the strip models. In the paper, an analytical model is presented to describe the AC transport current loss characteristics more generally than the Norris models and the model can well describe the experimental results.
AB - We measured AC transport current losses in two kinds of thin film YBCO coated conductors with different critical current densities. The results show that the loss characteristics do not follow the Norris strip model. The loss in one of the samples follows the Norris elliptical model and the loss data of the other sample fall in between the elliptical and strips models. It is considered that the loss in a YBCO conductor of high quality, that is, high critical current density, follows the strip model. However, the measured losses of even high critical current density conductor (Jc ≈ 106 A/cm2) does not follow the strip models. In the paper, an analytical model is presented to describe the AC transport current loss characteristics more generally than the Norris models and the model can well describe the experimental results.
KW - AC transport current loss
KW - High T superconductor
KW - Loss measurement
KW - YBCO coated conductor
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U2 - 10.1109/TASC.2002.1018717
DO - 10.1109/TASC.2002.1018717
M3 - Conference article
AN - SCOPUS:0036509649
SN - 1051-8223
VL - 12
SP - 1628
EP - 1631
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 1
T2 - 17th Annual Conference on Magnet Technology
Y2 - 24 September 2001 through 28 September 2001
ER -