Numerical Analysis of Non-Uniformities and Anisotropy in High-Temperature Superconducting Coils
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
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Hu, D., Ainslie, M., Zou, J., & Cardwell, D. (2014). Numerical Analysis of Non-Uniformities and Anisotropy in High-Temperature Superconducting Coils. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 25 https://doi.org/10.1109/TASC.2014.2379693
—High-temperature superconducting (HTS) coils play an important role in a number of large-scale engineering applications, such as electric machines employing HTS coated conductors. Non-uniformities and anisotropy in the properties of the coated conductor along its length and width can have a large impact on the performance of the tape, which directly influences the performance of an HTS electric machine. In this paper, the specific influences of non-uniformity and anisotropy on the dc properties of coils, such as the maximum allowable dc current, and the ac properties, such as ac loss, are analyzed using a numerical model based on the H formulation. It is found that non-uniformity along the conductor width has a large effect on the ac properties (i.e., ac loss) of a coil, but a relatively small effect on the dc properties (i.e., critical current). Conversely, non-uniformity along the length has a small effect on the ac coil properties, but has a large effect on the dc properties. Index Terms—AC loss, critical current density (superconductivity), high-temperature superconductors, numerical analysis, superconducting coils, transport ac loss.
AC loss, critical current density (superconductivity), high-temperature superconductors, numerical analysis, superconducting coils, transport ac loss
This work was supported in part by a Henan International Cooperation Grant, China: 144300510014. The work of D. Hu and J. Zou was supported in part by Churchill College, by the China Scholarship Council, and by the Cambridge Commonwealth, European, and International Trust. The work of M. D. Ainslie was supported by a Royal Academy of Engineering Research Fellowship.
Royal Academy of Engineering (RAEng) (10216/113)
External DOI: https://doi.org/10.1109/TASC.2014.2379693
This record's URL: https://www.repository.cam.ac.uk/handle/1810/246779