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    Bonded magnet, bonded magnet component, and bonded magnet production method
    2.
    发明授权
    Bonded magnet, bonded magnet component, and bonded magnet production method 有权
    粘结磁体，粘结磁体组分和粘结磁体制造方法

    公开(公告)号：US09583244B2

    公开(公告)日：2017-02-28

    申请号：US14867714

    申请日：2015-09-28

    Applicant: NICHIA CORPORATION

    Inventor： Rie Yoshida ,  Michiya Kume ,  Kohei Ihara ,  Taku Ichimori

    IPC: H01F7/02 ,  H01F41/02

    CPC classification number: H01F41/0266 ,  H01F7/021 ,  H01F41/0273

    Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.

    Abstract translation: 提供了包括第一和第二组分的粘结磁体。 第一和第二部件具有分别与第一和第二非作用表面相交的第一和第二非作用表面以及第一和第二作用表面。 第一和第二通量组分别从第一和第二非作用表面向第一和第二作用表面弯曲第一和第二组分内部。 第一和第二非作用表面的面积分别大于第一和第二作用表面。 第一和第二作用表面上的通量密度分别高于第一和第二非作用表面。 第一非作用表面上的极与第二非作用表面相反。 第一和第二非作用表面彼此连接。 第一个焊剂组从一个连续延伸到另一个。

    Rare-earth magnet and method of manufacturing the same
    3.
    发明授权
    Rare-earth magnet and method of manufacturing the same 有权

    公开(公告)号：US12217907B2

    公开(公告)日：2025-02-04

    申请号：US17539491

    申请日：2021-12-01

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NICHIA CORPORATION

    Inventor： Masaaki Ito ,  Daisuke Ichigozaki ,  Noritsugu Sakuma ,  Akihito Kinoshita ,  Michiya Kume ,  Hisashi Maehara

    IPC: H01F41/02 ,  B22F3/16 ,  B22F3/24 ,  H01F1/059

    Abstract: A rare-earth magnet and a method of manufacturing the same are provided. The method includes: preparing Sm—Fe—N magnetic powder; preparing reforming material powder containing metallic zinc; mixing the magnetic powder and the reforming material powder to obtain mixed powder; subjecting the mixed powder to compression molding in a magnetic field to obtain a magnetic-field molded body; subjecting the magnetic-field molded body to pressure sintering to obtain a sintered body; and subjecting the sintered body to heat treatment. A content proportion of the metallic zinc in the reforming material powder is 10 to 30% by mass with respect to the mixed powder. When a temperature and time in conditions for the heat treatment are defined as x° C. and y hours, respectively, the formulas y≥−0.32x+136 and 350≤x≤410 are met.

    Bonded magnet, bonded magnet component, and bonded magnet production method
    4.
    发明授权
    Bonded magnet, bonded magnet component, and bonded magnet production method 有权

    公开(公告)号：US10832863B2

    公开(公告)日：2020-11-10

    申请号：US15404501

    申请日：2017-01-12

    Applicant: NICHIA CORPORATION

    Inventor： Rie Yoshida ,  Michiya Kume ,  Kohei Ihara ,  Taku Ichimori

    IPC: H01F41/02 ,  H01F7/02

    Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.

    Bond magnet and method for manufacturing the same
    5.
    发明授权
    Bond magnet and method for manufacturing the same 有权

    公开(公告)号：US10232538B2

    公开(公告)日：2019-03-19

    申请号：US15131029

    申请日：2016-04-18

    Applicant: NICHIA CORPORATION

    Inventor： Kohei Ihara ,  Michiya Kume

    IPC: H01F1/057 ,  B29C47/00 ,  H01F41/02 ,  H01F1/113 ,  B29B7/42 ,  B29C47/40 ,  B29C47/92

    Abstract: A method for manufacturing a bond magnet includes providing a bond magnet composition including a magnetic material and a resin, extruding the bond magnet composition in one direction to produce a molded body while orienting the magnetic material in the one direction, magnetizing the molded body in the one direction using an axial magnetization to produce a magnetized molded body, and laminating the magnetized molded body to produce a laminated molded body including first magnetized molded layers and second magnetized molded layers. The first magnetized molded layers and the second magnetized molded layers are alternately laminated. A first magnetization direction of each of the first magnetized molded layers is opposite to a second magnetization direction of each of the second magnetized molded layers.

    Bonded magnet, bonded magnet component, and bonded magnet production method
    6.
    发明授权
    Bonded magnet, bonded magnet component, and bonded magnet production method 有权

    公开(公告)号：US11735358B2

    公开(公告)日：2023-08-22

    申请号：US17073914

    申请日：2020-10-19

    Applicant: NICHIA CORPORATION

    Inventor： Rie Yoshida ,  Michiya Kume ,  Kohei Ihara ,  Taku Ichimori

    IPC: H01F41/02 ,  H01F7/02

    CPC classification number: H01F41/0266 ,  H01F7/021 ,  H01F41/0273

    Abstract: A bonded magnet is provided which includes first and second components. The first and second components have first and second non-action surfaces, and first and second action surfaces that intersect the first and second non-action surfaces, respectively. First and second flux groups curve inside the first and second components from the first and second non-action surfaces to the first and second action surfaces, respectively. The areas of the first and second non-action surfaces are greater than the first and second action surfaces, respectively. The flux densities on the first and second action surfaces are higher than the first and second non-action surfaces, respectively. The pole on the first non-action surface is opposite to the second non-action surface. The first and second non-action surfaces are coupled to each other. The first flux groups continuously extend from one to another.

    Rare earth magnet and production method thereof
    7.
    发明授权
    Rare earth magnet and production method thereof 有权

    公开(公告)号：US12191059B2

    公开(公告)日：2025-01-07

    申请号：US17986366

    申请日：2022-11-14

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  NICHIA CORPORATION

    Inventor： Masaaki Ito ,  Motoki Hiraoka ,  Reimi Tabuchi ,  Hisashi Maehara ,  Michiya Kume

    IPC: H01F1/059 ,  B22F1/05 ,  B22F1/142 ,  B22F1/17 ,  B22F3/14

    Abstract: A Sm—Fe—N-based rare earth magnet more resistant to demagnetization than ever before in an environment where an external magnetic field is applied, particularly at high temperatures, and a production method thereof are provided.
    The present disclosure presents a production method of a rare earth magnet, including preparing a coated magnetic powder, compression-molding the coated magnetic powder in a magnetic field to obtain a magnetic-field molded body, pressure-sintering the magnetic-field molded body to obtain a sintered body, and heat-treating the sintered body, and a rare earth magnet obtained by the method. D50 of the magnetic powder in the coated magnetic powder is 1.50 μm or more and 3.00 μm or less, the content ratio of the zinc component in the coated magnetic powder is 3 mass % or more and 15 mass % or less, and the heat treatment temperature is 350° C. or more and 410° C. or less.

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