成果報告書詳細
管理番号20160000000105
タイトル*平成26年度中間年報 次世代自動車向け高効率モーター用磁性材料技術開発
公開日2016/3/30
報告書年度2014 - 2014
委託先名高効率モーター用磁性材料技術研究組合
プロジェクト番号P14015
部署名電子・材料・ナノテクノロジー部
和文要約
英文要約Title: Development of magnetic material technology for high-efficiency motors (FY2014-FY2016) FY2014 Annual Report

[1] Development of new high-performance magnets: (1) R&D on nano crystal grain sintered Neodymium magnets: Sintered Neodymium magnets were fabricated using nano crystalline grains with the average size of 0.8 micron made by HDDR method and Helium jet-mill. The temperature coefficient of the coercivity of these magnets was found to be improved with decreasing grain size. (2) R&D on anisotropic NdFeB d-HDDR magnets with high Br and coercivity: High performance magnets were developed via three steps; step-1 is a basic technology, step-2 is a coercivity improvement technology and step-3 is a Br improvement technology using new d-HDDR method. Optimizations of magnetic properties of the powders were also investigated. (3) R&D on fabrication of bulk magnets using nano particle FeN: Bulk with up to 70% relative density were obtained from mono-dispersed Fe16N2 nano-powder samples coated with non-magnetic thin nano-layer with Hc/Hk(grain)~0.3. Heat-resistant Fe16N2 samples were found to be stable up to 600 deg C. (4) R&D on nano-structured multi-phase magnets: Through modeling of ideal structures and constructing one of the guiding principles, the potential of nano-structured multi-phase magnets was clarified. (5) R&D on FeNi superstructure magnets: FeNi powders containing components with switching magnetic field exceeding 400kA/m were synthesized using electrochemical reduction. The possibility of atomic ordering of Fe and Ni was found using insertion/extraction of the third atoms. [2] Development of high-performance soft magnetic materials - Development of high-Bs nano-crystalline soft magnetic materials: A soft magnetic core with Bs over 1.6T was successfully fabricated using SPS technique from alloyed amorphous powder with high-Bs / high-formability composition. A thin strip core with the same composition showed the iron loss of 1/5 times less than that of an electrical steel core. [3] Development of high-efficiency motors: Evaluations of high/low temperature and 3-dimensional demagnetization, and high precision characterization of motors were developed. Basic design guideline to realize high-efficiency motors was developed. In order to design high efficiency motors considering stress effect, B-H curve tracers for thin soft magnetic ribbon under stress and evaluation methods for demagnetization of permanent magnets caused by compressive stress were developed. [4] Patent/technical trend survey and development of common fundamental technologies: Patents and technical papers on hard magnets, soft magnets and high-efficiency motors were surveyed and technical trends analysis were made. Sintering technologies of magnetic powders developed in each blanches into bulk with relative density over 90% were developed while keeping the magnetic properties. The magnetic properties of these bulk were improved by the surface modification.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る