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1. 发明授权

US10424426B2 Rare-earth magnet and method for manufacturing same 有权
公开(公告)号：US10424426B2
公开(公告)日：2019-09-24
申请号：US14896215
申请日：2014-06-05
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Masaaki Ito , Masao Yano , Hidefumi Kishimoto , Noritsugu Sakuma , Tetsuya Shoji , Akira Manabe
IPC分类号： H01F1/055 , H01F41/02 , B22F3/14 , B22F5/00 , C22C33/02 , C22C38/00 , H01F1/057 , C22C38/10
摘要： To provide a rare earth magnet ensuring excellent magnetic anisotropy while reducing the amount of Nd, etc., and a manufacturing method thereof.A rare earth magnet comprising a crystal grain having an overall composition of (R2(1-x)R1x)yFe100-y-w-z-vCowBzTMv (wherein R2 is at least one of Nd, Pr, Dy and Tb, R1 is an alloy of at least one or two or more of Ce, La, Gd, Y and Sc, TM is at least one of Ga, Al, Cu, Au, Ag, Zn, In and Mn, 0

2. 发明授权

US10351935B2 Magnetic compound and method of producing the same 有权
公开(公告)号：US10351935B2
公开(公告)日：2019-07-16
申请号：US14844478
申请日：2015-09-03
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Noritsugu Sakuma , Akira Kato , Kota Washio , Hidefumi Kishimoto , Masao Yano , Akira Manabe , Masaaki Ito , Shunji Suzuki , Kurima Kobayashi
IPC分类号： C22C30/02 , H01F1/059 , C22C1/02 , C22C30/00 , C22C38/00
摘要： Provided is a magnetic compound represented by the formula (R(1-x)Zrx)a(Fe(1-y)Coy)bTcMdAe (wherein R represents one or more rare earth elements, T represents one or more elements selected from the group consisting of Ti, V, Mo, and W, M represents one or more elements selected from the group consisting of unavoidable impurity elements, Al, Cr, Cu, Ga, Ag, and Au, A represents one or more elements selected from the group consisting of N, C, H, and P, 0≤x≤0.5, 0≤y≤0.6, 4≤a≤20, b=100−a−c−d, 0

3. 发明授权

US10892076B2 Rare earth magnet and method of producing the same 有权
公开(公告)号：US10892076B2
公开(公告)日：2021-01-12
申请号：US15832173
申请日：2017-12-05
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Masaaki Ito , Noritsugu Sakuma , Tetsuya Shoji , Hidefumi Kishimoto , Masao Yano
IPC分类号： H01F1/057 , H01F41/02 , H01F41/00
摘要： A rare earth magnet includes a main phase, a grain boundary phase present around the main phase and an intermediate phase interposed between the main phase and the grain boundary phase, and has an overall composition that is represented by the formula ((Ce(1-x)Lax)(1-y)R1y)pT(100-p-q-r)BqM1r′(R21-zM2z)s (where, R1 and R2 are rare earth elements other than Ce and La, T is at least one selected from among Fe, Ni, and Co, M1 is an element having a small amount that does not influence magnetic characteristics, and M2 is an alloy element for which a melting point of R21-zM2z is lower than a melting point of R2). A total concentration of Ce and La is higher in the main phase than in the intermediate phase, and a concentration of R2 is higher in the intermediate phase than in the main phase.

4. 发明授权

US10090090B2 Rare-earth nanocomposite magnet 有权
公开(公告)号：US10090090B2
公开(公告)日：2018-10-02
申请号：US15784975
申请日：2017-10-16
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA , NATIONAL INSTITUTE FOR MATERIALS SCIENCE
发明人： Hidefumi Kishimoto , Noritsugu Sakuma , Masao Yano , Weibin Cui , Yukiko Takahashi , Kazuhiro Hono
IPC分类号： H01F10/00 , H01F7/02 , C22C38/00 , H01F1/03 , H01F10/12
摘要： The invention provides a nanocomposite magnet, which has achieved high coercive force and high residual magnetization. The magnet is a non-ferromagnetic phase that is intercalated between a hard magnetic phase with a rare-earth magnet composition and a soft magnetic phase, wherein the non-ferromagnetic phase reacts with neither the hard nor soft magnetic phase. A hard magnetic phase contains Nd2Fe14B, a soft magnetic phase contains Fe or Fe2Co, and a non-ferromagnetic phase contains Ta. The thickness of the non-ferromagnetic phase containing Ta is 5 nm or less, and the thickness of the soft magnetic phase containing Fe or Fe2Co is 20 nm or less. Nd, or Pr, or an alloy of Nd and any one of Cu, Ag, Al, Ga, and Pr, or an alloy of Pr and any one of Cu, Ag, Al, and Ga is diffused into a grain boundary phase of the hard magnetic phase of Nd2Fe14B.

5. 发明授权

US11087922B2 Production method of rare earth magnet 有权
公开(公告)号：US11087922B2
公开(公告)日：2021-08-10
申请号：US15953183
申请日：2018-04-13
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Masaaki Ito , Noritsugu Sakuma , Masao Yano , Hidefumi Kishimoto , Tetsuya Shoji
IPC分类号： H01F41/02 , H01F1/057 , C22C38/16 , C22C38/06 , B22F1/00 , B22F9/04 , C22C1/04 , C22C38/00
摘要： A method for producing a rare earth magnet, including preparing a melt of a first alloy having a composition represented by (R1vR2wR3x)yTzBsM1t (wherein R1 is a light rare earth element, R2 is an intermediate rare earth element, R3 is a heavy rare earth element, T is an iron group element, and M1 is an impurity element, etc.), cooling the melt of the first alloy at a rate of from 100 to 102 K/sec to obtain a first alloy ingot, pulverizing the first alloy ingot to obtain a first alloy powder having a particle diameter of 1 to 20 μm, preparing a melt of a second alloy having a composition represented by (R4pR5q)100-uM2u (wherein R4 is a light rare earth element, R5 is an intermediate or heavy rare earth element, M2 is an alloy element, etc.), and putting the first alloy powder into contact with the melt of the second alloy.

6. 发明授权

US10748684B2 Rare-earth magnet and method for manufacturing same 有权
公开(公告)号：US10748684B2
公开(公告)日：2020-08-18
申请号：US16532651
申请日：2019-08-06
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Masaaki Ito , Masao Yano , Hidefumi Kishimoto , Noritsugu Sakuma , Tetsuya Shoji , Akira Manabe
IPC分类号： H01F41/02 , B22F3/14 , H01F1/055 , C22C33/02 , C22C38/00 , H01F1/057 , C22C38/10 , B22F5/00
摘要： To provide a rare earth magnet ensuring excellent magnetic anisotropy while reducing the amount of Nd, etc., and a manufacturing method thereof.A rare earth magnet comprising a crystal grain having an overall composition of (R2(1-x)R1x)yFe100-y-w-z-vCowBzTMv (wherein R2 is at least one of Nd, Pr, Dy and Tb, R1 is an alloy of at least one or two or more of Ce, La, Gd, Y and Sc, TM is at least one of Ga, Al, Cu, Au, Ag, Zn, In and Mn, 0

7. 发明申请

US20140260800A1 METHOD FOR PRODUCING MAGNETIC POWDER FOR FORMING SINTERED BODY THAT IS PRECURSOR OF RARE-EARTH MAGNET 审中-公开
标题翻译：用于形成用于形成易磁体的前驱体的烧结体的磁粉的制造方法
公开(公告)号：US20140260800A1
公开(公告)日：2014-09-18
申请号：US14350447
申请日：2012-10-09
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Noritsugu Sakuma , Hidefumi Kishimoto , Noritaka Miyamoto , Akira Kato , Akira Manabe , Daisuke Ichigozaki , Tetsuya Shoji , Shoichi Harakawa
IPC分类号： H01F1/20 , B22F9/04
CPC分类号： H01F1/20 , B22F9/04 , B22F2009/048 , C22C33/0278 , C22C38/002 , C22C38/005 , C22C38/10 , C22C2202/02 , H01F1/0571 , H01F1/0577
摘要： A method for producing magnetic powder for forming a sintered body that is a precursor of a rare-earth magnet. Provided is a method for producing magnetic powder for forming a sintered body that is a precursor of a rare-earth magnet, which can produce magnetic powder with a structure containing optimal nanosized crystal grains by accurately and efficiently sorting out magnetic powder containing no coarse grains in the structure thereof. A method for producing magnetic powder p for forming a sintered body S that is a precursor of a rare-earth magnet, the sintered body S including an Nd—Fe—B-based main phase with a nanocrystalline structure, and a grain boundary phase around the main phase, and the rare-earth magnet being adapted to be formed by applying hot deformation processing to the sintered body S for imparting anisotropy thereto and diffusing an alloy for improving coercivity therein, the method including discharging a metal melt onto a chill roll R to produce a quenched ribbon B, and grinding the quenched ribbon B into grains in the size range of 50 to 1000 μm to produce magnetic powder in the mass range of 0.0003 to 03 mg; conducting a test to see whether or not the magnetic powder in the mass range adsorbs onto a magnet with a surface magnetic flux density of 2 mT or less, and sorting out magnetic powder p that has not adsorbed onto the magnet, as the magnetic powder for forming the sintered body S.
摘要翻译：一种用于形成作为稀土类磁体的前体的烧结体的磁性粉末的制造方法。提供一种用于形成作为稀土类磁体的前体的烧结体的磁性粉末的制造方法，其可以通过精确有效地分选不含粗粒的磁性粉末来制造具有包含最佳纳米晶粒的结构的磁粉其结构。用于形成作为稀土类磁体的前体的烧结体S的磁性粉末p的制造方法，包括具有纳米晶体结构的Nd-Fe-B系主相和包含晶界相的烧结体S 主相和稀土磁体适用于通过向烧结体S施加热变形处理以赋予其各向异性并且扩散用于提高矫顽力的合金，所述方法包括将金属熔体排出到冷却辊R上制造淬火带B，将淬火带B研磨成粒径为50〜1000μm的粒子，制成质量范围为0.0003〜03mg的磁性粉末; 进行试验，以观察质量范围内的磁粉是否吸附在表面磁通密度为2mT以下的磁体上，并将未吸附在磁铁上的磁性粉末p进行分选，作为磁粉形成烧结体S.

8. 发明授权

US11078561B2 Soft magnetic material and method for producing the same 有权
公开(公告)号：US11078561B2
公开(公告)日：2021-08-03
申请号：US16417786
申请日：2019-05-21
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Kiyotaka Onodera , Hidefumi Kishimoto
IPC分类号： C22C45/04 , C22C33/00 , H01F1/153 , C22C45/02
摘要： There are provided a soft magnetic material having a high saturation magnetization and a low coercive force and excellent in thermal endurance, and a method for producing the same. The present disclosure relates to a soft magnetic material represented by the following composition formula: Fe100-x-yBxNiy, wherein x satisfies 10≤x≤16 in at %, and y satisfies 0

9. 发明授权

US10910987B2 Motor control method 有权
公开(公告)号：US10910987B2
公开(公告)日：2021-02-02
申请号：US16460100
申请日：2019-07-02
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Noritsugu Sakuma , Masao Yano , Masaaki Ito , Tetsuya Shoji , Hidefumi Kishimoto , Akira Kato
IPC分类号： H02P29/66 , H01F7/02 , H02P3/06
摘要： To provide a motor control method ensuring that dragging loss at the time of high rotation can be reduced.
A motor control method, wherein a composite permanent magnet has a core part and a shell part, the Curie temperature of one of the core part and the shell part is Tc1 K, and the Curie temperature of another is Tc2 K, and wherein when the magnitude of the reluctance torque is equal to or greater than the magnitude of the magnet torque, the temperature of the composite permanent magnet is set at Ts K that is (Tc1−100) K or higher and lower than Tc2 K and when the magnitude of the reluctance torque is less than the magnitude of the magnetic torque, the temperature of the composite permanent magnet is set at lower than the temperature Ts K or Tc1 K, whichever is lower.

10. 发明授权

US10468165B2 Rare-earth magnet and method for manufacturing same 有权
公开(公告)号：US10468165B2
公开(公告)日：2019-11-05
申请号：US14896215
申请日：2014-06-05
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： Masaaki Ito , Masao Yano , Hidefumi Kishimoto , Noritsugu Sakuma , Tetsuya Shoji , Akira Manabe
IPC分类号： H01F1/055 , H01F41/02 , B22F3/14 , B22F5/00 , C22C33/02 , C22C38/00 , H01F1/057 , C22C38/10
摘要： To provide a rare earth magnet ensuring excellent magnetic anisotropy while reducing the amount of Nd, etc., and a manufacturing method thereof.A rare earth magnet comprising a crystal grain having an overall composition of (R2(1-x)R1x)yFe100-y-w-z-vCowBzTMv (wherein R2 is at least one of Nd, Pr, Dy and Tb, R1 is an alloy of at least one or two or more of Ce, La, Gd, Y and Sc, TM is at least one of Ga, Al, Cu, Au, Ag, Zn, In and Mn, 0

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