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    • 9. 发明专利
    • Manufacturing method for rotor magnet of micro rotary electric machine
    • 微型旋转电机转子磁铁制造方法
    • JP2010051132A
    • 2010-03-04
    • JP2008214647
    • 2008-08-22
    • Minebea Co Ltdミネベア株式会社
    • YAMASHITA FUMITOSHI
    • H02K15/03B81B5/00B81C99/00H01F7/02H01F13/00
    • H01F10/3222B82Y25/00H01F1/0579H01F10/126H01F41/205H02K1/02H02K15/03Y10T29/49009Y10T29/49012Y10T29/49075Y10T29/49078
    • PROBLEM TO BE SOLVED: To provide a rotor magnet which meets a demand for a multipole configuration including four or more poles that is fit for a radial gap micro electric machine, has a property of cutting off an eddy current under a high-speed rotation, and improves the present residual magnetization Mr of 0.42 to 0.7 T. SOLUTION: The rotor magnet 5 is formed by R-TM-B crystallization as a thick-film laminate composed of a nano-complex-polycrystal texture which is isotropic in magnetism and is superior in magnetization properties to show a residual magnetization Mr of 0.95 T or more. When necessary, the rotor magnet 5 is subjected to in-plane multipole magnetization by cooling in a magnetic field. By adopting a nanostructure manipulation technique using a pulse laser deposition (PLD), in particular, a thick film is fabricated, which has a nano-complex texture made of alternately laminated 10 3 or more layers of artificially controlled αFe and R-TM-B. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了提供一种满足对包括适合于径向间隙微电机的四个或更多极的多极配置的需求的转子磁体,具有在高频下切断涡流的性质, 速度旋转,并且将目前的剩余磁化强度Mr改善为0.42〜0.7T。解决方案:转子磁体5由R-TM-B结晶形成为由纳米复合多晶体织构构成的厚膜层压体 磁性各向同性,磁化强度优异,残余磁化强度Mr为0.95T以上。 必要时,转子磁体5通过在磁场中冷却而进行面内多极磁化。 通过采用使用脉冲激光沉积(PLD)的纳米结构操作技术,特别地制造了一种厚膜,其具有由人工控制的交替层压10 或更多层的纳米复合结构 αFe和R-TM-B。 版权所有(C)2010,JPO&INPIT