2013 Fiscal Year Final Research Report
Investigation of non-uniform current distribution and establishment of desigin guideline for large current capacity in Y-base superconducting coil
| Project/Area Number |
23560309
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Tohoku University |
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Principal Investigator |
TSUDA Makoto 東北大学, 工学(系)研究科(研究院), 教授 (10267411)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 超電導 / コイル / 偏流 / 電流分布 / イットリウム |
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| Research Abstract |
We analytically and experimentally evaluated the current distributions in a toroidal coil composed of the series connected double pancake coils composed of a stacked conductor with parallel-connected multiple YBCO tapes and a toroidal coil composed of the parallel-connected multiple double pancake coils composed of single YBCO tape conductor connected in series. Based on these results, we investigated the cause of non-uniform current distribution in the toroidal coils and the desigin guideline for an YBCO toroidal coil with large current capacity. Due to quite small distance between the tapes, the non-uniform current distribution in the stacked conductor is easily occurred by the difference of the self-inductance in each tape due to a manufacturing error of tape thickness. Therefore, the parallel-connected multiple double pancake coils composed of single tape conductor is effective for preventing the non-uniform current distribution.
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