2012 Fiscal Year Final Research Report
Evaluation of thermal-electromagnetic properties of superconducting coil separating two risk factors of magnetic fields and temperature and its optimal design
| Project/Area Number |
22360120
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Kagoshima University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGOE Akifumi 鹿児島大学, 理工学研究科, 准教授 (40315396)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 超伝導 / コイル / 線材 / 導体 / 損失 / 安定性 / 電磁特性 |
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| Research Abstract |
In order to improve performance of superconducting coils, the new method to design the coils has been proposed. The method is based on a new idea thatthe maximum magnetic fields and the highest temperature areas are separated. Firstly, a measuring method of profile of Poynting’s vector around superconducting tapes or coils has been developed. In addition, a method to estimate local loss generation in windings has been established by applying Poynting’s vector method. Secondary, it was clarified that a test conductor composed of five MgB_2tapes has high stability, which is equal or more than that of NbTi Rutherford cable with high stability due to low resistive contact between strands. Finally, a new loss reduction method suppressing changes of magnetic fields has been proposed. And then the validity of the method has been experimentally confirmed by using Bi-2223 coil wound.
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Research Products
(12 results)
