2022 Fiscal Year Final Research Report
Developments of Homogenization Techniques of Soft Magnetic Composite in Magnetic Field Analysis and Design of Design of Small High Frequency Reactor
| Project/Area Number |
19K04354
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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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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | Saga University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
高 炎輝 大分大学, 理工学部, 准教授 (40586286)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 圧粉磁芯 / 磁界解析 / 均質化手法 / 鉄損 / 異常渦電流損 / リアクトル / インダクタンス / 異方性 |
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| Outline of Final Research Achievements |
In this research, homogenization techniques of soft magnetic composite (SMC), which is metallic magnetic materials for high frequencies, are developed, and an optimal design of reactor is done.(1) In the eddy current loss calculation, methods to take account of not only the classical eddy current loss but also the excess loss, moreover, the non-uniformities of the particles, gaps, domain widths and directions are proposed, and the measured eddy current loss can be represented.(2) In the inductance calculation, a method to model the anisotropic magnetic characteristics due to compression molding by the flattened particle cell model is proposed, and the measured inductance can be represented. Moreover, it is shown that the characteristics of the incremental inductance become better by setting the legs to be the compression direction, which has worse magnetic characteristics.
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| Free Research Field |
電力工学・電力変換・電気機器
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| Academic Significance and Societal Importance of the Research Achievements |
鋼板が規則正しく積み上げられた積層鉄芯の均質化手法とは異なり，粒子及びギャップにばらつきがある圧粉磁芯の均質化手法では，これらのばらつきにより，磁芯内の磁束分布が不均一となり，この不均一性を考慮しないと渦電流損失などの磁気特性を表現できないことを示した学術的意義は高い．また，そのばらつきが渦電流損の増加に及ぼす影響，圧縮成形がインダクタンスに及ぼす影響を示した社会的意義は大きい．
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