Evaluation of Insulating Magnetic Materials Composed of Epoxy Resin and Pure Iron Powder for Motor and Reactor Core Applications

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門（英文）

発行日: 2021/11/01

タイトル(英語): Evaluation of Insulating Magnetic Materials Composed of Epoxy Resin and Pure Iron Powder for Motor and Reactor Core Applications

著者名: Katsuya Hirata (Hitachi Industrial Equipment Systems Co., Ltd./Graduate School of Science and Technology, Meiji University), Gaku Obara (Graduate School of Science and Technology, Meiji University), Hiroshi Katsumata (Graduate School of Science and Techno

著者名(英語): Katsuya Hirata (Hitachi Industrial Equipment Systems Co., Ltd./Graduate School of Science and Technology, Meiji University), Gaku Obara (Graduate School of Science and Technology, Meiji University), Hiroshi Katsumata (Graduate School of Science and Technology, Meiji University)

キーワード: magnetic wedge，iron powder，epoxy resin composite，insulation

要約(英語): The insulation and magnetic properties of epoxy composed of pure iron powders were studied as a function of iron powder volume fraction (RFe) in the range of 0-70vol% to achieve a good balance between the insulation and magnetic properties. Frequency-dependent impedance measurement revealed that the relative permittivity, εr', at 10kHz increased from 4.2 to 278.4 with increasing RFe up to 50vol%. The loss factor, εr”, increased from 0.2 to 86.1 and the electric conductivity, σ, increased from 9.9 × 10-8S/m to 4.8 × 10-5S/m at 10kHz with increasing RFe up to 50vol%. The dependence of σ on RFe was explained by the equivalent serial capacitor-resistor (CR) connection model. The initial maximum relative permeability, μr_max, increased from 3.7 to 8.9 with increasing RFe up to 70vol%. These data were compared with those for the “Reference” sample which has been in practical use in industrial electric machine applications.

本誌: IEEJ Journal of Industry Applications Vol.10 No.6 （2021） Special Issue on “ICEMS 2020-Hamamatsu”

本誌掲載ページ: 606-611 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/10/6/10_20012626/_article/-char/ja/