AC loss characteristics of multifilamentary YBCO coated conductors
AC loss characteristics of multifilamentary YBCO coated conductors
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DOI：
10.1109/tasc.2005.849216
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发表时间：
2005-06
影响因子：
1.8
通讯作者：
N. Amemiya;K. Yoda;S. Kasai;Zhenan Jiang;G. Levin;P. Barnes;C. Oberly
中科院分区：
文献类型：
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作者：
N. Amemiya;K. Yoda;S. Kasai;Zhenan Jiang;G. Levin;P. Barnes;C. Oberly
降低YBCO涂层导体在垂直磁场中的磁化损失的方法之一是将YBCO层细分成细丝并将其扭转成一个整体。采用激光烧蚀技术制备了直径为200 /spl mu/m的10 mm宽多丝YBCO涂层导体。菌丝数为40根。样品长度在100 ~ 25 mm范围内变化，在不同频率下测量了磁化损失。测量的磁化损耗使用样品长度、频率和场振幅进行缩放。阐明了多丝YBCO涂层导体的磁化损耗特性，得到了磁化损耗的经验表达式。利用二维有限元模型对实测损失与数值计算损失进行了比较。实验证实了条纹对降低磁化损失的作用，并与理论预测进行了比较。
One of the methods to reduce magnetization loss of YBCO coated conductors in a perpendicular magnetic field is subdividing the YBCO layer into filaments and twisting them as a whole. A 10 mm wide multifilamentary YBCO coated conductor with 200 /spl mu/m wide filaments was prepared by striation using the laser ablation technique. The number of filaments was 40. The sample length was varied from 100 mm to 25 mm, and their magnetization loss was measured at various frequencies. The measured magnetization losses were scaled using sample length, frequency, and field amplitude. This clarifies the magnetization loss characteristics of multifilamentary YBCO coated conductors and obtains empirical expressions for the magnetization loss. The measured loss was compared with the loss calculated numerically using a two dimensional FEM model. The experimentally confirmed effect of striation to reduce the magnetization loss was compared with theoretical predictions.