| Project/Area Number |
18K04101
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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 | Ibaraki University |
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Principal Investigator |
Soda Naoya 茨城大学, 理工学研究科(工学野), 准教授 (80323210)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | ベクトル磁気特性 / 小型モータ / 高効率 / 高出力密度 / 固定子鉄心 / 形状設計 / 極薄電磁鋼 / 鉄損 / 分割コア / 極薄電磁鋼板 / 極薄無方向性電磁鋼板 |
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| Outline of Final Research Achievements |
High-efficient and high-power density design methods of a small motor core using vector magnetic property analysis technique are proposed to develop a small permanent magnet motor with high-efficient and high-power density using ultra-thin non-oriented electrical steel sheet. First, a stator core design by a Bezier curve for decreasing core loss and a stator core design by cutting out the low magnetic flux density region for realizing high power density motor are proposed. Analysis results confirmed that the method of combining both stator core designs improves the power density of small motor about 20-30% for initial motor model. Next, core loss decreasing method by combination of segmented stator core and application of the corner radius to each tooth root is proposed. Analysis results confirmed that this technique reduced the iron loss of a stator core about 17%.
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| Academic Significance and Societal Importance of the Research Achievements |
板厚0.1mm(100μm)程度の電磁鋼板はこれまでに国内外にあったが，極薄電磁鋼板は50～80μmであり圧倒的に渦電流損が低い。また，極薄電磁鋼板は高い周波数領域においても高飽和磁束密度を有するため，高効率・高出力小型モータの鉄心として最適な材料であり，世界的にみても圧倒的に有利である。この極薄電磁鋼板の磁気特性を最大限に活用し，小型モータの効率を低減させることなく出力密度を向上させる設計法を確立させることは，高効率・高出力密度を有する小型永久磁石モータの開発にとって大変重要である。
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