Magnetic properties of Compressed amorphous powder cores and their application to DC-DC converters.

压缩非晶磁粉芯的磁性能及其在 DC-DC 转换器中的应用。

• 批准号: 10555107
• 负责人: YAGI Masaaki
• 金额: $ 6.91万
• 依托单位: Sojo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555107/
• 关键词: amorphous; Fe-based alloys; powder particles; commpressed powder core; DC-DC coverter; 軟磁性粉末; ホットプレス; 周化成形; 固化成形

Fe-based amorphous powder particles with excellent soft-magnetic properties were fabricated by our new atomization process "spinning water atomization process(SWAP)", which has both a high quenching rate and mass- production potential. In addition, these amorphous particles were insulated by glass fine powder and pressed into toroidal, E- and pot-shaped cores by hot-pressing techniques at relatively high temperature conditions below crystallization temperature. The cores fablicated had superior magnetic properties compared with commercial Sendust powder core. The coercive force was half and the flux density B_m at 300 Oe was 30% higher. The initial permeability up to 1 MHz was about 90-110, and the core loss at 100 kHz for B_m=0.1 T was 660 kW/m^3. The former was comparable to that of Sendust and the latter was 20% lower. The amorphous cores obtained were applied to DC-DC converters working at 100 kHz. The conversion efficiency examined at out put power up to 300 W was higher than that of converters utilizing a typical commercial Sendust core and a single gapped ferrite core. Furthermore, the magnetic properties of gapped pot-shped core for inductive charger were also studied. For the cores with a gap of above 1.5mm, the loss of amorphous powder core exhibited lower than that of ferrite.

采用我们的新型雾化工艺“旋转水雾化工艺（SWAP）”制备了具有优异软磁性能的铁基非晶粉末颗粒，该工艺具有高淬火速率和批量生产潜力。此外，这些非晶态颗粒被玻璃细粉绝缘，并通过热压技术在低于结晶温度的较高温度条件下压制成环形、E型和罐形磁芯。与商业铁硅铝磁粉芯相比，制造的磁芯具有优越的磁性能。矫顽力减半，300 Oe 下的磁通密度 B_m 高出 30%。高达 1 MHz 时的初始磁导率约为 90-110，B_m=0.1 T 时 100 kHz 时的磁芯损耗为 660 kW/m^3。前者与铁硅铝相当，后者低20%。所得非晶磁芯应用于工作频率为100 kHz的DC-DC转换器。在输出功率高达 300 W 时测试的转换效率高于采用典型商用铁硅铝磁芯和单间隙铁氧体磁芯的转换器。此外，还研究了感应充电器用有间隙罐形磁芯的磁性能。对于间隙大于1.5mm的磁芯，非晶粉磁芯的损耗低于铁氧体磁芯的损耗。

项目成果

M.Yagi et al.: "Magnetic properties of Fe-based amorphous powder cores produced by a hot-pressing method"Journal of Magnetism and Magnetic Materials. 215-216. 284-287 (2000)

M.Yagi等人：“热压法生产的铁基非晶磁粉芯的磁性”《磁性与磁性材料杂志》。

八木,大塚,遠藤: "非接触充電用アモルファス粉末成形磁心の磁気特性"第22回日本応用磁気学会講演概要集. 174 (1998)

Yagi、Otsuka、Endo：“用于非接触充电的非晶粉末成型磁芯的磁性”第 22 届日本应用磁学学会摘要，174（1998 年）

村田,原田,八木,遠藤,木田: "アモルファス粉体形成磁心のコンバータへの適用"日本応用磁気学会誌. 23・4-2. 1505-1508 (1999)

Murata、Harada、Yagi、Endo、Kida：“非晶粉末形成的磁芯在转换器中的应用”日本应用磁学学会杂志 23・4-2（1999）。

M.Yagi,I.Endo,I.Othuka,H.Yamamoto,R.Okuno and A.Shintani: "MAGNETIC PROPERTIES OF Fe-BASED AMORPHOUS POWDER CORES PRODUCED BY A HOT-PRESSING METHOD" 14th International Conference on SOFT MAGNETIC MATERIALS. 発表予定. (1頁) (1999)

M.Yagi、I.Endo、I.Othuka、H.Yamamoto、R.Okuno 和 A.Shintani：“热压法生产的铁基非晶磁粉芯的磁性”第 14 届国际软磁材料会议。演示时间表（1 页）（1999 年）

I.Endo,I.Othuka,R.Okuno,A.Shintani,M.Yoshino and M.Yagi: "Fe-based Amorphous Soft-Magnetic Powder Produced by Spinning Water Atomization Process(SWAP)" INTERMAG99(The 1999 IEEE International Magnetic Conference). 発表予定. DP-02 2頁 (1999)

I.Endo、I.Othuka、R.Okuno、A.Shintani、M.Yoshino 和 M.Yagi：“通过旋转水雾化工艺（SWAP）生产铁基非晶软磁粉末”INTERMAG99（1999 年 IEEE 国际磁学会议）会议）。DP-02 2 页（1999 年）。