Current-Sharing Properties in Parallel Conductors Composed of REBCO Superconducting Tapes
書誌事項
- 公開日
- 2017-06
- 資源種別
- journal article
- 権利情報
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- https://ieeexplore.ieee.org/Xplorehelp/downloads/license-information/IEEE.html
- DOI
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- 10.1109/tasc.2017.2670078
- 公開者
- Institute of Electrical and Electronics Engineers (IEEE)
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説明
For the application of Re1Ba2Cu3O7-δ (REBCO: RE such as Y, Gd, and Eu) superconducting tapes to large-scale magnets, an enhancement of current capacity is required for magnet protection. In this study, a configuration of parallel conductors were introduced, and the current-sharing properties of three-strand parallel conductors wound into a pancake coil were investigated. An equivalent resistance exists even for a much smaller current than the critical current I c. This should influence the current sharing among the tapes even if inductances are balanced by transposition. Uneven current sharing could lead to a fatal problem in the uniformity of a produced magnetic field, which is usually on the order of ppm. In this paper, every branch current was evaluated by numerically solving the circuit equation. As a result, it is shown that, in the case where the constituent tapes are different in I c and n values, this should influence the current sharing among the tapes even if both the inductances and joint resistances are balanced among the tapes. An unbalance is serious when the difference in I c and the n value is large. In addition, an unbalance increases as frequency decreases. The results suggest that uniformity in I c and the n value of the REBCO tapes is important for the development of MRI magnets.
収録刊行物
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- IEEE Transactions on Applied Superconductivity
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IEEE Transactions on Applied Superconductivity 27 (4), 1-5, 2017-06
Institute of Electrical and Electronics Engineers (IEEE)
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詳細情報 詳細情報について
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- CRID
- 1360285710367990016
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- ISSN
- 15582515
- 10518223
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE