2014 Fiscal Year Final Research Report
High-Performance Computational Techniques for Practical Electromagnetic-Field Analysis in High-Temperature Superconductor
| Project/Area Number |
24560321
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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 | Yamagata University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 高温超伝導体 / 臨界電流密度 / 数値シミュレーション / 非線形方程式 / 有限要素法 |
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| Outline of Final Research Achievements |
The governing equations of the shielding current density in a high-temperature superconducting (HTS) film are formulated for the case where the film contains cracks. In order to assure the uniqueness of the solution of the derived equations, additional boundary conditions are also derived. A numerical method is proposed for solving the initial-boundary-value problem of the equations.
By using the proposed method, the applicability of the scanning permanent-magnet method (SPM) to the crack identification in an HTS film is investigated. To this end, a defect parameter is defined and it is calculated along various scanning lines. The results of computations show that a crack position can be roughly identified by scanning an HTS film in two opposite directions. Hence, the SPM must be combined with the inductive method to develop a fast high-resolution method for identifying a crack.
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| Free Research Field |
超伝導工学
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