HTS Flux Pump Charging an HTS Coil: Experiment and Modeling
HTS Flux Pump Charging an HTS Coil: Experiment and Modeling
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DOI：
10.1109/tasc.2021.3090353
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发表时间：
2021
影响因子：
1.8
通讯作者：
L. Fu;K. Matsuda;B. Shen;T. Coombs
中科院分区：
文献类型：
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作者：
L. Fu;K. Matsuda;B. Shen;T. Coombs
磁通泵是补偿高温超导磁体持续运行时磁场衰减的有效装置。本文对行波高温超导电磁通量泵的模型进行了更新，其中磁化系统被建模为L-R电路。在本文中，我们考虑各种阻力的来源。超导体的电阻由三个部分组成，即超导体的连接电阻、超导体的电阻和动态电阻。接头电阻被视为常数。从E-J模型推导出超导电阻，最后得出动态电阻是外加场强和频率的函数。此外，该模型包括电动势，这是一个功能的所施加的领域，频率和表面积的磁带。这是基于我们构建的φ模型计算的值。为了测试该模型，进行了一系列实验，其中使用我们的通量泵驱动HTS线圈。磁通泵试验台由4对矩形铜扁线叠片铁芯组成，铁芯固定在支撑铁框架上。该装置用于在77 K下磁化双层高温超导跑道线圈。超导线圈中的感应电流可以达到临界电流的90%以上。我们的模型被发现是一个很好的拟合实验数据。
An HTS flux pump is an effective device to compensate the field decay in HTS magnets running in persistent mode. This paper contains updates to the model for the travelling wave HTS electromagnetic flux pump, in which the magnetization system is modelled as an L-R circuit. In this paper we consider the various sources of resistance. There are three components, joint resistance, resistance of superconductor and dynamic resistance. Joint resistance is treated as a constant. The superconducting resistance is derived from the E-J model and finally the dynamic resistance is a function of applied field strength and frequency. In addition the model includes the electromotive force which is a function of the applied field, frequency and surface area of the tape. This is a calculated value based on the φ model we built. In order to test the model, a series of experiments were performed in which an HTS coil was actuated using our flux pump. The flux pump test rig was made from 4-pair rectangular copper solenoids with laminated iron cores, which were fixed on the supporting iron frame. This rig was used to magnetize a double layer HTS racetrack coil at 77 K. The induced current in superconducting coil can reach more than 90% of critical current. Our model was found to be a good fit to the experimental data.