Calculation of alternating current losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
Calculation of alternating current losses in stacks and coils made of second generation high temperature superconducting tapes for large scale applications
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DOI：
10.1063/1.4827375
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发表时间：
2013-11-07
影响因子：
3.2
通讯作者：
Sorensen, Mads P.
中科院分区：
文献类型：
--
作者：
Zermeno, Victor M. R.;Abrahamsen, Asger B.;Sorensen, Mads P.
本文提出了一种均匀化方法来模拟第二代高温超导带材在交流电流或磁场作用下的堆芯结构。这个想法是找到一个各向异性体等效的堆栈，使绝缘，金属，超导和基板层的内部交替结构的几何布局被“洗”出来，同时保持原始堆栈的整体电磁行为。我们忽略假设的临界区域的形状，并使用幂律E-J关系，允许超临界电流密度被认为是。这里提出的方法允许高达2个数量级的计算加速因子相比，充分的2-D模拟考虑到堆栈的实际尺寸，而不影响精度。(c)2013 AIP Publishing LLC.
A homogenization method to model a stack of second generation High Temperature Superconducting tapes under AC applied transport current or magnetic field has been obtained. The idea is to find an anisotropic bulk equivalent for the stack such that the geometrical layout of the internal alternating structures of insulating, metallic, superconducting, and substrate layers is "washed" out while keeping the overall electromagnetic behavior of the original stack. We disregard assumptions upon the shape of the critical region and use a power law E-J relationship allowing for overcritical current densities to be considered. The method presented here allows for a computational speedup factor of up to 2 orders of magnitude when compared to full 2-D simulations taking into account the actual dimensions of the stacks without compromising accuracy. (c) 2013 AIP Publishing LLC.