Development of physical and phenomenological models of stress-dependent vector magnetic properties of core materials for electric machins
| Project/Area Number |
17K06300
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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 | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
藤原 耕二 同志社大学, 理工学部, 教授 (20190093)
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 電気機器工学 / 電子・電気材料 / シミュレーション工学 / 電気電子材料 |
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| Outline of Final Research Achievements |
[1. Development of measuring technique of stress-dependent vector magnetic property] A pair of piezoelectric films is attached to a circular sample of silicon steel sheet in the rotational single sheet tester, wherein the film shrinks to exert compressive stress on the sheet.
[2. Improvements of domain model] The magnetostatic computation is simplified for a fast magnetization analysis under mechanical stress without loss of prediction accuracy. Using the identification method of vector play model, the pinning-field distribution in the domain model is identified from measured BH loops under the stress-free condition.
[3. Study of equivalent stress theory] Equivalent stress models are numerically tested to predict the stress-dependent magnetic property from a unidirectional measurement.
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| Academic Significance and Societal Importance of the Research Achievements |
応力下の磁気計測と物理的モデルによるシミュレーションにより，磁化と応力の方向が異なる場合の磁化特性の応力依存性を明らかにするとともに，その結果を用いて，応力依存性を簡潔に表現するためのベクトル等価応力モデルを開発した。この技術を用いて，応力下での計測をすることなく，あるいは最小限の計測に基づき，応力・磁界連成解析を行うことが可能になり，モータ製造時の特性劣化とその要因を評価することが可能になった。
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Report
(5 results)
Research Products
(18 results)
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[Presentation] Efficient Multiscale Magnetic-Domain Analysis of Iron-Core Material under Mechanical Stress2017
Author(s)
A. Nishikubo, S. Ito, T. Mifune, T. Matsuo, C. Kaido, Y. Takahashi, K. Fujiwara
Organizer
62th Annual Conference on Magnetism and Magnetic Materials, Pittsburgh, U.S.A., BU-03, 2017
Related Report
Int'l Joint Research
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