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    RARE EARTH MAGNET AND METHOD FOR PRODUCING THEREOF
    1.
    发明申请
    RARE EARTH MAGNET AND METHOD FOR PRODUCING THEREOF 有权

    公开(公告)号：US20220130580A1

    公开(公告)日：2022-04-28

    申请号：US17465961

    申请日：2021-09-03

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Akihito KINOSHITA ,  Akira KATO

    IPC: H01F1/055 ,  C22C38/00 ,  H01F1/057

    Abstract: To provide an R—Fe—B-based rare earth magnet excellent in the squareness and magnetic properties at high temperatures, and method for producing thereof.
    The present disclosure relates to a rare earth magnet including a main phase 10 and a grain boundary phase 20 present around the main phase 10, and a method for producing thereof. In the rare earth magnet of the present disclosure, the overall composition is represented, in terms of molar ratio, by the formula: (R1(1-x)Lax)y(Fe(1-z)Coz)(100-y-w-v)BwM1v, wherein R1 is a predetermined rare earth element, M1 is a predetermined element, 0≤x≤0.1, 12.0≤y≤20.0, 0.1≤z≤0.3, 5.0≤w≤20.0, and 0≤v≤2.0. The main phase 10 has an R2Fe14B-type crystal structure, the average particle diameter of the main phase 10 is less than 1 μm, and the volume ratio of a phase having an RFe2-type crystal structure in the grain boundary phase 20 is 0.40 or less relative to the grain boundary phase 20.

    RARE EARTH MAGNET
    3.
    发明申请
    RARE EARTH MAGNET 审中-公开

    公开(公告)号：US20180182516A1

    公开(公告)日：2018-06-28

    申请号：US15846343

    申请日：2017-12-19

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Masaaki ITO ,  Noritsugu SAKUMA ,  Masao YANO ,  Hidefumi KISHIMOTO ,  Tetsuya SHOJI

    IPC: H01F1/058 ,  C22C38/16 ,  C22C38/06 ,  C22C38/00

    CPC classification number: H01F1/058 ,  C22C38/002 ,  C22C38/005 ,  C22C38/06 ,  C22C38/16 ,  C22C2202/02 ,  H01F1/0577

    Abstract: To provide an R—Fe—B-based rare earth magnet where R is mainly Ce, ensuring that even when a rare earth element R1 except for Ce is very small in amount or is not present, the coercive force can be enhanced.A rare earth magnet wherein the rare earth magnet has a total composition represented by the formula: CepR1qT(100-p-q-r-s)BrM1s (wherein R1 is a rare earth element except for Ce, T is one or more members selected from Fe, Ni and Co, M1 is one or more members selected from Ti, Ga, Zn, Si, Al, Nb, Zr, Mn, V, W, Ta, Ge, Cu, Cr, Hf, Mo, P, C, Mg, Hg, Ag, and Au, and an unavoidable impurity, and p, q, r, and s are 11.80≤p≤12.90, 0≤q≤3.00, 5.00≤r≤20.00, and 0≤s≤3.00), and wherein the rear earth magnet comprises a magnetic phase and a (Ce,R1)-rich phase present around the magnetic phase.

    MAGNETIC MATERIAL AND MANUFACTURING METHOD THEREOF
    6.
    发明申请
    MAGNETIC MATERIAL AND MANUFACTURING METHOD THEREOF 有权

    公开(公告)号：US20220102033A1

    公开(公告)日：2022-03-31

    申请号：US17478043

    申请日：2021-09-17

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： NORITSUGU SAKUMA ,  Tetsuya SHOJI ,  Akihito KINOSHITA ,  Akira KATO

    IPC: H01F1/057

    Abstract: A magnetic material according to the present disclosure includes a main phase having an R2T14B type crystal structure (R is a rare earth element and T is a transition metal element). The main phase has a composition represented by ((Nd, Pr)(1-x-y)LaxR1y))2((Fe(1-z-w)(Co, Ni)zMw))14B (where, R1 is a rare earth element other than Nd, Pr, and La, M is an element other than Fe, Co, Ni, and a rare earth element, and the like, and 0.25≤x≤1.00, 0≤y≤0.10, 0.15≤z≤0.40, and 0≤w≤0.1 are satisfied). A manufacturing method of the magnetic material according to the present disclosure includes melting a raw material containing the elements constituting the main phase and solidifying the melted raw material.

    METHOD OF PRODUCING MOTOR CORE
    7.
    发明申请
    METHOD OF PRODUCING MOTOR CORE 审中-公开

    公开(公告)号：US20200303998A1

    公开(公告)日：2020-09-24

    申请号：US16811811

    申请日：2020-03-06

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Akihito KINOSHITA ,  Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Kosuke YONEKAWA

    IPC: H02K15/03 ,  H02K1/02 ,  H01F1/057 ,  H01F1/147 ,  C22C38/00 ,  H05B6/80

    Abstract: A method of producing a motor core includes preparing a soft magnetic plate containing a transition metal element, preparing a modifying member containing an alloy having a melting point lower than a melting point of the soft magnetic plate, bringing the modifying member into contact with a part of a plate surface of the soft magnetic plate, causing the modifying member to diffuse and penetrate into the soft magnetic plate from a contact surface between the soft magnetic plate and the modifying member and forming a hard magnetic phase-containing part in a part of the soft magnetic plate, and laminating a plurality of soft magnetic plates on each other after the modifying member is brought into contact with the part of the plate surface of the soft magnetic plate.

    RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF
    8.
    发明申请
    RARE EARTH MAGNET AND PRODUCTION METHOD THEREOF 审中-公开

    公开(公告)号：US20190006068A1

    公开(公告)日：2019-01-03

    申请号：US16013101

    申请日：2018-06-20

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  TOHOKU UNIVERSITY

    Inventor： Noritsugu SAKUMA ,  Tetsuya SHOJI ,  Kazuaki HAGA ,  Satoshi SUGIMOTO ,  Masashi MATSUURA

    IPC: H01F1/057 ,  H01F41/02

    Abstract: To provide a rare earth magnet having excellent coercive force and a production method thereof. A rare earth magnet, wherein the rare earth magnet comprises a magnetic phase containing Sm, Fe, and N, a Zn phase present around the magnetic phase, and an intermediate phase present between the magnetic phase and the Zn phase, wherein the intermediate phase contains Zn and the oxygen content of the intermediate phase is higher than the oxygen content of the Zn phase; and a method for producing a rare earth magnet, including mixing a magnetic raw material powder having an oxygen content of 1.0 mass % or less and an improving agent powder containing metallic Zn and/or a Zn alloy, and heat-treating the mixed powder.

    INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM RECORDED WITH INFORMATION PROCESSING PROGRAM
    10.
    发明公开
    INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND RECORDING MEDIUM RECORDED WITH INFORMATION PROCESSING PROGRAM 审中-公开

    公开(公告)号：US20240248450A1

    公开(公告)日：2024-07-25

    申请号：US18413951

    申请日：2024-01-16

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Tetsuya SHOJI ,  Masao YANO ,  Hanae SHIRATORI

    IPC: G05B19/048

    CPC classification number: G05B19/048 ,  G05B2219/25064

    Abstract: An information processing device that acquires a data set including a combination of state data representing a time series of states when a target object is worked combined with at least one of performance data representing a performance of the target object, data representing a structure or physical property of the target object, or process data representing a process setting value when the target object is worked. The information processing device generates a principal component value of each of a plurality of items of the state data in the acquired data set by executing principal component analysis on the plurality of items of state data. The information processing device outputs information representing a relationship between principal component values of the plurality of items of state data, and the at least one of the performance data, the data representing the structure or physical property, or the process data.

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