Investigation of Demagnetization in HTS Stacked Tapes Implemented in Electric Machines as a Result of Crossed Magnetic Field
Investigation of Demagnetization in HTS Stacked Tapes Implemented in Electric Machines as a Result of Crossed Magnetic Field
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DOI：
10.1109/tasc.2014.2372873
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发表时间：
2015-06-01
影响因子：
1.8
通讯作者：
Coombs, T. A.
中科院分区：
文献类型：
--
作者：
Baghdadi, M.;Ruiz, H. S.;Coombs, T. A.
本文探讨了超导叠层带在超导电机中的实际应用效果。超导体在各种实际应用中的应用已经在文献中得到了广泛的讨论。然而，在实际应用中，由于交叉场效应，超导体的磁化强度会急剧下降。在我们的研究中，我们将超导叠层带应用于我们实验室设计和制造的同步超导电机中，与超导体相比，旨在减少交叉场效应引起的退磁。应用横向交流磁场，讨论了横向磁场的频率、幅值和周期数的影响。此外，还模拟了16层超导带的堆叠，并评估了在样品上施加交叉磁场的后果。实验与模拟的对比，使我们对叠带的交叉场效应有了更深入的了解。最后，根据超导体和高磁导率材料（金属和金属玻璃）的屏蔽特性，提出了预防措施。另一方面，上述材料的屏蔽特性将阻碍磁场的穿透，从而达到降低退磁的目的。
This paper investigates the practical effectiveness of employing superconducting stacked tapes to superconducting electric machinery. The use of superconducting bulks in various practical applications has been addressed extensively in the literature. However, in practice, dramatic decrease in magnetization would occur on superconducting bulks due to the crossed field effect. In our study, we employed the superconducting stacked tapes in a synchronous superconducting motor, which was designed and fabricated in our laboratory, aiming to lessen demagnetization due to crossed field effect in comparison with superconducting bulks. Applying the transverse AC field, the effects of frequency, amplitude, and number of cycles of the transverse magnetic field are discussed. Furthermore, a stack of 16 layers of superconducting tapes is modelled and the consequences of applying the crossed magnetic field on the sample are evaluated. The confrontation between experiments and simulation allows us to thoroughly understand the crossed field effects on stacked tapes. At the end, a preventive treatment, based on the shielding characteristic of superconductor and materials with high permeability, i. e. mu-metal and metalic glass, is suggested. On the other hand, the shielding feature of aforementioned materials will hinder the penetration of magnetic field and, consequently, reduction of the demagnetization will be attained.