finite element model for simulating second generation high temperature superconducting coils/stacks with large number of turns
finite element model for simulating second generation high temperature superconducting coils/stacks with large number of turns
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DOI：
10.1063/1.4995802
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发表时间：
2017-07-28
影响因子：
3.2
通讯作者：
Yuan, Weijia
中科院分区：
文献类型：
--
作者：
Liang, Fei;Venuturumilli, Sriharsha;Yuan, Weijia
提出了一种基于二维T-A公式的计算第二代高温超导体带堆和线圈电磁特性的有效方法。在该方法中，超导体的薄带近似，其中超导层被建模为1维域。该公式主要是基于超导层中电流矢势T的计算和整个空间中磁矢势A的计算，在模型中这两个计算耦合在一起。与以往的基于T的模型相比，该模型是创新的，在磁矢位A的求解，这是通过使用微分法，而不是积分方法来实现。为了验证T-A公式模型的有效性，采用该模型对第二代高温超导（2G HTS）带材制成的跑道线圈进行了仿真，并将仿真结果与实验数据进行了比较。结果表明，T-A公式计算2G高温超导线圈的磁场分布、电流密度分布和交流损耗是准确有效的。最后，该模型被用来模拟一个2000匝线圈，以证明其有效性和效率，在模拟大规模的2G高温超导线圈。出版社：AIP Publishing
An efficient two dimensional T-A formulation based approach is proposed to calculate the electromagnetic characteristics of tape stacks and coils made of second generation high temperature superconductors. In the approach, a thin strip approximation of the superconductor is used in which the superconducting layer is modeled as a 1-dimensional domain. The formulation is mainly based on the calculation of the current vector potential T in the superconductor layer and the calculation of the magnetic vector potential A in the whole space, which are coupled together in the model. Compared with previous T-based models, the proposed model is innovative in terms of magnetic vector potential A solving, which is achieved by using the differential method, instead of the integral method. To validate the T-A formulation model, it is used to simulate racetrack coils made of second generation high temperature superconducting (2G HTS) tape, and the results are compared with the experimentally obtained data on the AC loss. The results show that the T-A formulation is accurate and efficient in calculating 2G HTS coils, including magnetic field distribution, current density distribution, and AC loss. Finally, the proposed model is used for simulating a 2000 turn coil to demonstrate its effectiveness and efficiency in simulating large-scale 2G HTS coils. Published by AIP Publishing.