Difference of AC Losses Between Nonstriated and Striated Tape and Applicability of Temperature Scaling Law to Stacked Striated Tape
Difference of AC Losses Between Nonstriated and Striated Tape and Applicability of Temperature Scaling Law to Stacked Striated Tape
复制标题
无纹带和纹带之间的交流损耗差异以及温度缩放定律对堆叠纹带的适用性
DOI：
10.1109/tasc.2018.2789458
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
A. Ibi
中科院分区：
文献类型：
--
作者：
T. Ito;M. Iwakuma;S. Miura;T. Izumi;K. Adachi;T. Machi;A. Ibi
在较宽的温度和磁场幅度范围内研究了无条纹和条纹REBa2Cu3Oy（REBCO，RE =稀土元素，Y、Gd、Eu）超导带材堆的交流损耗特性，并进行了比较。结果表明，对于无条纹带，磁通前沿穿过带中心的穿透场（Bp）随叠带数（N）的增加而增加。当磁场幅值（B）小于Bp时，无条纹带的交流损耗随N的增大而减小。相反，对于条纹带，Bp对N的依赖性很小，交流损耗也随N略有变化。这些现象似乎是由于退磁效应。结果表明，在条纹REBCO和nonstriated磁带的交流损耗缩放与温度无关的堆叠磁带的数量。这表明，REBCO磁带的交流损耗可以很容易地估计在这项研究中测量的温度，无论条纹和堆叠，提供的影响水平的温度上的临界电流在自场和交流损耗在某些温度是已知的。
The ac loss properties of stacks of nonstriated and striated REBa2Cu3Oy(REBCO, RE = rare earth elements, Y, Gd, Eu) superconducting tapes were investigated over a wide range of temperature and magnetic field amplitude, and compared with each other. The results obtained show that the penetration field (Bp), in which the magnetic flux front penetrates the center of the tape, increases with increasing number of stacked tapes (N) for the nonstriated tapes. In addition, the ac losses in the nonstriated tapes for a smaller magnetic field amplitude (B) thanBpdecreases asNincreases. On the contrary, for the striated tapes,Bpmarginally depends onNand the ac losses also show slight variations withN. These phenomena seem to be due to the demagnetizing effect. It was shown that the ac losses in the striated REBCO and nonstriated tapes are scaled with temperature regardless of the number of stacked tapes. This suggests that the ac losses of REBCO tapes can be easily estimated for temperature measured in this study regardless of striating and stacking, provided that the impact level of temperature on the critical current at self-field and the ac losses at certain temperatures are known.