公开(公告)号：US20110080066A1

公开(公告)日：2011-04-07

申请号：US12893772

申请日：2010-09-29

申请人： Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

发明人： Yuhito Doi ,  Takehisa Minowa ,  Hajime Nakamura ,  Koichi Hirota

IPC分类号： H02K21/14

CPC分类号： H02K1/276 ,  H01F1/0577 ,  H01F41/0293 ,  H02K1/278

摘要： A permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments embedded in the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor, or a permanent magnet rotary machine comprises a rotor comprising a rotor core and a plurality of permanent magnet segments mounted on the surface of the rotor core and a stator having a plurality of coils and disposed to define a gap with the rotor. In the rotor, each permanent magnet segment is an assembly of divided permanent magnet pieces, the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece, and the assembly allows for electrical conduction between the magnet pieces.

摘要翻译： 永磁旋转机械包括转子，转子包括转子芯和嵌入在转子芯中的多个永磁体段，以及具有多个线圈并且设置成与该转子间隔开的定子，或者永磁旋转机械包括： 转子，其包括转子芯和安装在转子芯的表面上的多个永磁体段和具有多个线圈并设置成与转子限定间隙的定子。 在转子中，每个永磁体段是分开的永久磁体块的组件，靠近磁体片表面的矫顽力高于磁片内部的矫顽力，并且组件允许磁体片之间的导电 。

公开(公告)号：US20090226339A1

公开(公告)日：2009-09-10

申请号：US11916498

申请日：2007-03-28

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： B22F7/04

CPC分类号： C23C10/30 ,  B22F3/24 ,  B22F2003/241 ,  B22F2003/242 ,  B22F2003/247 ,  B22F2003/248 ,  C21D6/00 ,  C22C38/005 ,  C22C2202/02 ,  C23C10/28 ,  C23C10/52 ,  C23C24/08 ,  H01F1/0577 ,  H01F41/0293

摘要： A method for preparing a rare earth permanent magnet material is characterized by comprising the steps of disposing a powder mixture on a surface of a sintered magnet body of R1—Fe—B composition wherein R1 is at least one element selected from rare earth elements inclusive of Sc and Y, the powder mixture comprising a powder containing at least 0.5% by weight of M which is at least one element selected from Al, Cu, and Zn and having an average particle size equal to or less than 300 μm and a powder containing at least 30% by weight of a fluoride of R2 which is at least one element selected from rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, and heat treating the magnet body having the powder disposed on its surface at a temperature equal to or below the sintering temperature of the magnet body in vacuum or in an inert gas, for causing at least one of M and R2 in the powder mixture to be absorbed in the magnet body. The invention provides an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

摘要翻译： 一种制备稀土永磁材料的方法的特征在于包括以下步骤：在R1-Fe-B组合物的烧结磁体的表面上设置粉末混合物，其中R 1是选自稀土元素中的至少一种元素，包括 Sc和Y，所述粉末混合物包含含有至少0.5重量％的M的粉末，所述M是至少一种选自Al，Cu和Zn的元素，并且具有等于或少于300μm的平均粒度和包含 至少30重量％的R 2的氟化物，其为选自包括Sc和Y的稀土元素中的至少一种元素，并且具有等于或小于100μm的平均粒度，并且对具有粉末的磁体进行热处理 在真空中或在惰性气体中的等于或低于磁体的烧结温度的温度下，在粉末混合物中使M和R2中的至少一个吸收在磁体中。 本发明提供一种具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

公开(公告)号：US07559996B2

公开(公告)日：2009-07-14

申请号：US11489595

申请日：2006-07-20

申请人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

发明人： Koji Miyata ,  Koichi Hirota ,  Hajime Nakamura ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/08

CPC分类号： H02K1/278 ,  B22F3/24 ,  B22F2003/242 ,  B22F2003/245 ,  B22F2003/248 ,  B22F2998/00 ,  B22F2998/10 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293 ,  H02K15/03 ,  C22C33/0278 ,  B22F3/10 ,  B22F2201/10 ,  B22F2201/20

摘要： A rare earth permanent magnet is prepared from a sintered magnet body of a R1—Fe—B composition wherein R1 is a rare earth element inclusive of Y and Sc, by forming a plurality of slits in a surface of the magnet body, disposing a powder on the magnet body surface, the powder comprising an oxide of R2, a fluoride of R3, or an oxyfluoride of R4 wherein each of R2, R3, and R4 is a rare earth element, and heat treating the magnet body and the powder below the sintering temperature in vacuum or in an inert gas.

摘要翻译： 通过在磁体的表面上形成多个狭缝，由R1-Fe-B组合物的烧结磁体制备稀土永磁体，其中R 1是包括Y和Sc的稀土元素，设置粉末 在磁体表面上，包含R2的氧化物，R3的氟化物或R4的氟氧化物的粉末，其中R2，R3和R4各自是稀土元素，并且将磁体和粉末以下的粉末进行热处理 在真空或惰性气体中的烧结温度。

公开(公告)号：US20090098006A1

公开(公告)日：2009-04-16

申请号：US11916506

申请日：2007-03-28

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： B22F7/04

CPC分类号： B22F7/02 ,  C21D6/00 ,  C22C38/005 ,  H01F1/0577 ,  H01F41/0293

摘要： A method for preparing a rare earth permanent magnet material comprises the steps of disposing a powder on a surface of a sintered magnet body of R1aTbAcMd composition wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, A is boron (B) and/or carbon (C), M is Al, Cu, Zn, In, Si, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, said powder comprising an oxide of R2, a fluoride of R3 or an oxyfluoride of R4 wherein R2, R3, and R4 are rare earth elements inclusive of Sc and Y and having an average particle size equal to or less than 100 μm, heat treating the magnet body and the powder at a temperature equal to or below the sintering temperature of the magnet body for absorption treatment for causing R2, R3, and R4 in the powder to be absorbed in the magnet body, and repeating the absorption treatment at least two times. According to the invention, a rare earth permanent magnet material can be prepared as an R—Fe—B sintered magnet with high performance and a minimized amount of Tb or Dy used.

摘要翻译： 一种制备稀土永磁材料的方法包括以下步骤：在R1aTbAcMd组合物的烧结磁体的表面上设置粉末，其中R1是包括Sc和Y的稀土元素，T是Fe和/或Co，A 是硼（B）和/或碳（C），M是Al，Cu，Zn，In，Si，P，S，Ti，V，Cr，Mn，Ni，Ga，Ge，Zr，Nb，Mo， ，Ag，Cd，Sn，Sb，Hf，Ta或W，所述粉末包含R2的氧化物，R3的氟化物或R4的氟氧化物，其中R2，R3和R4是包括Sc和Y的稀土元素， 具有等于​​或小于100μm的平均粒度，在等于或低于磁体的烧结温度的温度下对磁体和粉末进行热处理，以便使粉末中的R2，R3和R4进行吸收处理 被吸收在磁体中，并且重复吸收处理至少两次。 根据本发明，稀土永磁材料可以制备成具有高性能和最小量的Tb或Dy的R-Fe-B烧结磁体。

公开(公告)号：US20080054736A1

公开(公告)日：2008-03-06

申请号：US11846690

申请日：2007-08-29

申请人： Koji MIYATA ,  Hajime NAKAMURA ,  Koichi HIROTA ,  Takehisa MINOWA

发明人： Koji MIYATA ,  Hajime NAKAMURA ,  Koichi HIROTA ,  Takehisa MINOWA

IPC分类号： H02K1/27 ,  H02K15/12

CPC分类号： H02K1/02 ,  H01F1/0577 ,  H01F41/0293 ,  H02K1/278 ,  H02K15/03 ,  H02K29/03

摘要： In a rotating machine comprising a rotor including a rotor core and a plurality of permanent magnet segments, and a stator including a stator core and windings, the permanent magnet segment is obtained by disposing a powder comprising an R2 oxide, R3 fluoride or R4 oxyfluoride on a sintered magnet body of R1—Fe—B composition, wherein R1 to R4 are rare earth elements, and heat treating the powder-covered magnet body. The permanent magnet segment of a cross-sectional shape which is tapered from the center toward opposed ends has a higher coercive force at the ends than at the center.

摘要翻译： 在包括转子铁心和多个永久磁铁段的转子以及包括定子铁心和绕组的定子的旋转机械中，永久磁铁段是通过设置包括R 2， 氧化物，R 3氟化物或R 4氟氧化物在R 1 -Fe-B组合物的烧结磁体上，其中R 1 到R 4是稀土元素，并且对粉末覆盖的磁体进行热处理。 从中心向相对端逐渐变细的横截面形状的永磁体段在端部具有比中心更高的矫顽力。

公开(公告)号：US20070240789A1

公开(公告)日：2007-10-18

申请号：US11783782

申请日：2007-04-12

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： H01F1/057

CPC分类号： H01F41/0293 ,  H01F1/0577

摘要： A rare earth permanent magnet material is prepared by covering a sintered magnet body of R1—Fe—B composition wherein R1 is a rare earth element, with a powder comprising at least 30% by weight of an alloy of R2aTbMcAdHe wherein R2 is a rare earth element, T is Fe and/or Co, and M is Al, Cu or the like, and having an average particle size up to 100 μm, and heat treating the powder-covered magnet body at a suitable temperature, for causing R2, T, M and A in the powder to be absorbed in the magnet body.

摘要翻译： 稀土永磁材料通过覆盖其中R 1为稀土元素的R 1 -Fe-B组合物的烧结磁体制成，其中粉末包含 至少30重量％的R 2的合金，其中R 1，R 2，C 2， 其中R 2是稀土元素，T是Fe和/或Co，M是Al，Cu等，并且具有平均值 粒径达100μm，并在合适的温度下对粉末覆盖的磁体进行热处理，以使粉末中的R 2，T，M和A被吸收在磁体中。

公开(公告)号：US20070240788A1

公开(公告)日：2007-10-18

申请号：US11783639

申请日：2007-04-11

申请人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

发明人： Hajime Nakamura ,  Takehisa Minowa ,  Koichi Hirota

IPC分类号： H01F1/057

CPC分类号： H01F41/0293 ,  H01F1/0577

摘要： A permanent magnet material is prepared by covering an anisotropic sintered magnet body of formula: R1x(Fe1-yCoy)100-x-z-aBzMa wherein R1 is a rare earth element, M is Al, Cu or the like, with a powder comprising an oxide of R2, a fluoride of R3 or an oxyfluoride of R4 wherein R2, R3, and R4 are rare earth elements, and having an average particle size up to 100 μm, heat treating the powder-covered magnet body in a hydrogen gas-containing atmosphere for inducing disproportionation reaction on R12Fe14B compound, and continuing heat treatment at a reduced hydrogen gas partial pressure for inducing recombination reaction to said compound, thereby finely dividing said compound phase to a crystal grain size up to 1 μm, and for effecting absorption treatment, thereby causing R2, R3 or R4 to be absorbed in the magnet body.

摘要翻译： 通过覆盖以下结构的各向异性烧结磁体制备永久磁铁材料：R 1→X 2（Fe 1-y Co） 其中R 1为稀土元素，M为M，其中R 1为稀土元素，M 是Al，Cu等，其中包含R 2 2的氧化物，R 3的氟化物或R 4的氟氧化物的粉末， 其中R 2，R 3和R 4是稀土元素，并且具有高达100μm的平均粒度，热处理 在含氢气体气氛中的粉末覆盖的磁体，用于在R 1 2 Fe 14 B化合物上诱导歧化反应，并且继续热处理 在降低的氢气分压下引起与所述化合物的复合反应，由此将所述化合物相细分至1μm以下的晶粒尺寸，进行吸收处理，从而使R 2，R 或 3 R 4被吸收在磁体中。

公开(公告)号：US20070157998A1

公开(公告)日：2007-07-12

申请号：US10589237

申请日：2005-06-20

申请人： Koichi Hirota ,  Takehisa Minowa

发明人： Koichi Hirota ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/059

CPC分类号： C22C1/0441 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/005 ,  H01F1/057 ,  B22F9/04 ,  B22F3/02 ,  B22F3/1007 ,  B22F2201/02 ,  B22F2201/20 ,  B22F2201/11

摘要： A R—Fe—B base rare earth permanent magnet material consists of, in percents by weight, 25 to 45 wt % of R, 0.1 to 4.5 wt % of Co, 0.8 to 1.4 wt % of B, 0.05 to 3.0 wt % of Al, 0.02 to 0.5 wt % of Cu, 0.03 to 0.5 wt % of M, 0.01 to 0.5 wt % of C, 0.05 to 3.0 wt % of O, 0.002 to 0.1 wt % of N, 0.001 to 2.0 wt % of F, with the balance of Fe and incidental impurities, wherein R is at least one element selected from among Nd, Pr, Dy, Tb and Ho, and M is at least one element selected from among Zr, Hf, Ti, Cr, Nb, Mo, Si, Sn, Zn, V, W and Cr.

摘要翻译： R-Fe-B基稀土永磁材料以重量百分比为25〜45重量％的R，0.1〜4.5重量％的Co，0.8〜1.4重量％的B，0.05〜3.0重量％ Al，0.02〜0.5重量％的Cu，0.03〜0.5重量％的M，0.01〜0.5重量％的C，0.05〜3.0重量％的O，0.002〜0.1重量％的N，0.001〜2.0重量％的F， 余量为Fe和杂质，其中R为选自Nd，Pr，Dy，Tb和Ho中的至少一种元素，M为选自Zr，Hf，Ti，Cr，Nb，Mo中的至少一种元素 ，Si，Sn，Zn，V，W和Cr。

公开(公告)号：US20070115120A1

公开(公告)日：2007-05-24

申请号：US11598780

申请日：2006-11-14

申请人： Kohji Ito ,  Hitoshi Takayanagi ,  Koichi Hirota ,  Fumio Yajima ,  Nobumasa Misaki

发明人： Kohji Ito ,  Hitoshi Takayanagi ,  Koichi Hirota ,  Fumio Yajima ,  Nobumasa Misaki

IPC分类号： G08B13/26 ,  G08B21/00

CPC分类号： B60R21/01532 ,  B60N2/002 ,  B60N2/0232 ,  B60N2/0276 ,  B60N2/4228 ,  B60N2/4279 ,  B60N2/888

摘要： A seat for a vehicle includes: a detecting sensor detecting an occupant having a planar antenna electrode, at which electric filed is generated, and a ground electrode arranged with a clearance along an outer periphery of the antenna electrode. The antenna electrode can be provided with a hole at the center of the antenna electrode.

摘要翻译： 一种用于车辆的座椅包括：检测传感器，其检测具有生成电场的平面天线电极的乘员以及沿着天线电极的外周排列成间隙的接地电极。 天线电极可以在天线电极的中心设置一个孔。

公开(公告)号：US20060213585A1

公开(公告)日：2006-09-28

申请号：US11340521

申请日：2006-01-27

申请人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

发明人： Hajime Nakamura ,  Koichi Hirota ,  Masanobu Shimao ,  Takehisa Minowa

IPC分类号： H01F1/057 ,  H01F1/058

CPC分类号： H01F1/0577 ,  H01F1/058 ,  H01F41/0266 ,  H01F41/0293

摘要： A functionally graded rare earth permanent magnet having a reduced eddy current loss in the form of a sintered magnet body having a composition RaEbTcAdFeOfMg is obtained by causing E and fluorine atoms to be absorbed in a R—Fe—B sintered magnet body from its surface. F is distributed such that its concentration increases on the average from the center toward the surface of the magnet body, the concentration of E/(R+E) contained in grain boundaries surrounding primary phase grains of (R,E)2T14A tetragonal system is on the average higher than the concentration of E/(R+E) contained in the primary phase grains, the oxyfluoride of (R,E) is present at grain boundaries in a grain boundary region that extends from the magnet body surface to a depth of at least 20 μm, particles of the oxyfluoride having an equivalent circle diameter of at least 1 μm are distributed in the grain boundary region at a population of at least 2,000 particles/mm2, the oxyfluoride is present in an area fraction of at least 1%. The magnet body includes a surface layer having a higher electric resistance than in the interior. In the permanent magnet, the generation of eddy current within a magnetic circuit is restrained.

摘要翻译： 功能梯度稀土永磁体，其具有呈烧结磁体形式的具有减小的涡流损耗的组合物，其具有组成R a a B B C C 通过使E和氟原子被吸收在...中而获得。 R-Fe-B烧结磁体从其表面。 F的分布使得其浓度从磁体的中心向表面平均增加，包含在（R，E）2的主相晶粒周围的晶界中的E /（R + E）浓度 四方晶系平均高于主相晶粒中所含的E /（R + E）浓度，（R，E）的氟氧化物存在于 在从磁体表面延伸至至少20μm的深度的晶界区域中的晶界，具有至少1um的当量圆直径的氟氧化物颗粒至少分布在晶界区域 2,000颗粒/ mm 2，氟氧化物以至少1％的面积分数存在。 磁体包括具有比内部更高的电阻的表面层。 在永磁体中，抑制了磁路内的涡电流的产生。