Radial anisotropic cylinder type ferrite magnets and their manufacturing
methods and motors
    1.
    发明授权
    Radial anisotropic cylinder type ferrite magnets and their manufacturing methods and motors 失效
    径向各向异性圆柱型铁氧体磁铁及其制造方法和电机

    公开(公告)号:US5506557A

    公开(公告)日:1996-04-09

    申请号:US146190

    申请日:1994-01-18

    摘要: A high performance radial anisotropic cylinder-shape ferrite magnet for use in a motor to lower its noise and enable miniaturization thereof is formed of an integrated one-piece body formed of sintered Sr and/or Ba ferrite powders and has an axially-extending slit that is created before the body is sintered to reduce internal stress due to shrinkage. The slit can extend in parallel to both the axial and radial directions of the body, diagonally to both the axial and radial directions, or diagonally to the radial direction and parallel to the axial direction. The slit can be filled with a resin material.

    摘要翻译: PCT No.PCT / JP93 / 00319 Sec。 371日期1994年1月18日 102(e)日期1994年1月18日PCT 1993年3月17日PCT公布。 公开号WO93 / 19020 PCT 日本9月30日,1993年。用于电机降低噪声并使其小型化的用于电动机的高性能径向各向异性圆柱形铁氧体磁体由形成为Sr和/或Ba铁氧体粉末的一体化整体形成, 具有在被烧结之前产生的轴向延伸狭缝,以减少由于收缩引起的内部应力。 狭缝可以平行于主体的轴向和径向方向两者沿轴向和径向方向,或者与半径方向对角并且平行于轴向方向延伸。 狭缝可以填充树脂材料。