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    • 42. 发明申请
    • Methods of producing radial anisotropic cylinder sintered magnet and permanent magnet motor-use cyclinder multi-pole magnet
    • 制造径向各向异性圆柱体烧结磁体和永磁电动机用旋转多极磁铁的方法
    • US20070151629A1
    • 2007-07-05
    • US10589470
    • 2005-06-20
    • Koji SatoTakehisa Minowa
    • Koji SatoTakehisa Minowa
    • H01F41/02
    • H02K15/03H01F1/086H01F41/028
    • A method involves the steps of using a mold having a core made of a ferromagnetic material, charging a mold cavity with a magnet powder, compacting the magnet powder while applying an orienting magnetic field according to the vertical compacting in horizontal magnetic field process, and sintering the compact, thereby producing a radially anisotropic annular sintered magnet in which the remanence in a radial direction of the annulus increases and decreases at intervals of 90° in a circumferential direction of the annulus, and the remanence in a radial direction over the entire circumference of the annulus has a maximum of 0.95-1.60 T and a minimum equal to 50-95% of the maximum. A method for preparing an annular multi-pole magnet for a permanent magnet motor involves magnetizing the magnet so that the boundary between N and S poles is located within the range that is centered at the radial direction where the remanence exhibits the minimum and extends ±10° therefrom in a circumferential direction.
    • 一种方法包括以下步骤:使用具有由铁磁材料制成的芯体的模具,用磁体粉末填充模具腔体,在水平磁场过程中根据垂直压实施加定向磁场,压实磁体粉末,并且烧结 从而产生径向各向异性的环状烧结磁体,其中环形空间的径向上的剩余量在圆环的圆周方向上以90°的间隔增大和减小,并且在整个圆周上沿径向的剩余量 环形最大值为0.95-1.60 T,最小值为最大值的50-95%。 制备用于永磁电动机的环形多极磁体的方法包括使磁体磁化,使得N极和S极之间的边界位于以剩磁为最小的径向方向为中心的范围内,并且延伸±10 °。