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1. 发明公开

EP3276802A1 RARE-EARTH MAGNET AND LINEAR MOTOR USING SAME 有权
标题翻译：稀土磁体和线性电机使用同一个
公开(公告)号：EP3276802A1
公开(公告)日：2018-01-31
申请号：EP16768878.7
申请日：2016-03-24
申请人： Nitto Denko Corporation
发明人： FUJIHARA Makoto , HOSHINO Toshinobu , SAITO Shoichiro , FUJIKAWA Kenichi
IPC分类号： H02K41/03 , H01F1/057 , H01F7/02 , H02K15/03
CPC分类号： H01F7/02 , H01F1/0577 , H01F13/003 , H01F41/0273 , H01F41/028 , H02K15/03 , H02K41/02 , H02K41/03
摘要： Provided are a rare-earth magnet capable of realizing a high magnetic flux amount without using any back yoke, and a linear motor comprising a movable element using the rare-earth permanent magnet. A rare-earth permanent magnet-forming sintered body for forming a permanent magnet is integrally sintered while being formed into a given three-dimensional shape with a lengthwise cross-section having a first surface extending in a length direction thereof, a second surface lying at a distance from the first surface in a thickness direction thereof and extending in the length direction, and an edge surface of each of lengthwise opposite ends thereof. This sintered body is formed such that easy magnetization axes of the magnet material particles included in a central region thereof are oriented in such a manner as to be directed along an arch-shaped path. In a first end region, easy magnetization axes of the magnet material particles included therein are oriented in such a manner as to be directed along a path which enters an inside of the sintered body from the first surface and extends toward the second surface. In a second end region, easy magnetization axes of the magnet material particles included therein are oriented in such a manner as to be directed along a path which enters the inside of the sintered body from the second surface and extends toward the first surface.
摘要翻译：本发明提供一种不使用背轭而能够实现高磁通量的稀土类磁铁以及具备使用该稀土类永久磁铁的可动元件的线性电动机。用于形成永磁体的稀土永磁体形成烧结体整体烧结，同时形成具有纵向截面的给定三维形状，该纵截面具有沿其长度方向延伸的第一表面，第二表面位于从第一表面沿其厚度方向并沿长度方向延伸的距离以及其长度方向相对端部中的每一个的边缘表面。该烧结体形成为包含在其中心区域中的磁体材料粒子的易磁化轴被定向为沿着弓形路径定向。在第一端部区域中，包含在其中的磁体材料颗粒的易磁化轴以这样的方式定向，即，使得其沿着从第一表面进入烧结体内部并且朝向第二表面延伸的路径。在第二端部区域中，包含在其中的磁体材料颗粒的易磁化轴以这样的方式定向，使得其沿着从第二表面进入烧结体内部并且朝向第一表面延伸的路径。

2. 发明公开

EP3276796A1 RARE-EARTH PERMANENT MAGNET-FORMING SINTERED COMPACT AND ROTARY ELECTRIC MACHINE INCLUDING RARE-EARTH PERMANENT MAGNET 有权
标题翻译：稀土永磁成形烧结紧凑型旋转电机，包括稀土永磁
公开(公告)号：EP3276796A1
公开(公告)日：2018-01-31
申请号：EP16768880.3
申请日：2016-03-24
申请人： Nitto Denko Corporation
发明人： FUJIHARA Makoto , FUJIKAWA Kenichi , SAITO Shoichiro
IPC分类号： H02K1/27 , H01F7/02 , H02K1/22 , H02K15/03 , H01F1/057 , H01F1/08
CPC分类号： H01F7/0247 , H01F1/053 , H01F1/0577 , H01F1/08 , H01F7/02 , H01F41/0273 , H01F41/028 , H02K1/22 , H02K1/27 , H02K15/03
摘要： Provided are: a rotary electric machine that includes a rotor having a plurality of permanent magnets arranged in the circumferential direction, and in which the leakage of magnetic flux can be suppressed with a simple structure; and a rare-earth permanent magnet-forming sintered compact for forming rare-earth permanent magnets to be used in said rotary electric machine. This rare-earth permanent magnet is made by sintering and molding magnet material particles including a rare-earth substance, and at least one of the end surfaces at respective end sections is inclined outward in the length direction from an end section, in the length direction, of a first surface, and thereby constitutes a first inclined surface forming a predetermined three-dimensional shape having a lengthwise cross-sectional shape in which the length of the first surface is made shorter than that of a second surface. The rare-earth permanent magnet is partitioned into a central region in the length direction, and a first end-section region covering a range having a predetermined lengthwise dimension from said at least one end surface. In the central region, the axis of magnetization of the magnet material particles included in the central region is arranged in a parallel orientation in which the axis of magnetization is oriented in a substantially perpendicular direction to the first surface extending in the length direction. As for the magnet material particles included in the first end-section region: at a position adjacent to said at least one end surface, the axis of magnetization is inclined with respect to the first surface and directed toward the first surface so as to be along the inclination angle of the first inclined surface forming said end surface; at a position adjacent to the central region, the axis of magnetization is directed toward the first surface so as to be oriented in a substantially perpendicular direction to the first surface; and, between said at least one end surface and said central region, the axis of magnetization is oriented in a converging manner so as to be directed toward the first surface at inclination angles that gradually change from the end surface toward the central region.
摘要翻译：本发明提供一种旋转电机，其具有转子，该转子具有沿周向排列的多个永久磁铁，能够以简单的结构抑制磁通的泄漏，以及用于形成在所述旋转电机中使用的稀土永磁体的稀土永磁体形成烧结体。该稀土类永久磁铁是通过将含有稀土类物质的磁铁材料粒子烧结成形而形成的，各端部的至少一个端面在长度方向上从端部向长度方向外侧倾斜由此构成第一倾斜表面，该第一倾斜表面形成具有其中第一表面的长度比第二表面的长度短的纵向截面形状的预定三维形状。稀土类永久磁铁被划分为长度方向的中央区域和从所述至少一个端面覆盖规定长度尺寸的范围的第一端部区域。在中央区域，中央区域所包含的磁体原材料粒子的磁化轴配置成磁化轴的方向与在长度方向上延伸的第一面大致垂直的方向。关于包括在第一端部区域中的磁体材料颗粒：在与所述至少一个端面相邻的位置处，磁化轴相对于第一表面倾斜并指向第一表面以沿着形成所述端面的第一倾斜面的倾斜角度; 在与所述中央区域相邻的位置处，所述磁化轴朝向所述第一表面以便定向在与所述第一表面大致垂直的方向上; 并且在所述至少一个端面和所述中心区域之间，所述磁化轴线以会聚的方式定向，以便以从所述端面朝向所述中心区域逐渐变化的倾斜角度朝向所述第一表面。

3. 发明公开

EP3379703A1 SINTERED BODY FOR FORMING RARE EARTH MAGNET, AND RARE EARTH PERMANENT MAGNET OBTAINED BY MAGNETIZING SAID SINTERED BODY 无效
公开(公告)号：EP3379703A1
公开(公告)日：2018-09-26
申请号：EP16866387.0
申请日：2016-11-17
申请人： Nitto Denko Corporation
发明人： FUJIHARA Makoto , FUJIKAWA Kenichi , SAITO Shoichiro
IPC分类号： H02K15/03 , H01F7/02 , H01F13/00 , H02K1/27
CPC分类号： H01F1/086 , H01F7/02 , H01F13/00 , H01F41/0253 , H02K1/02 , H02K1/27 , H02K1/2706 , H02K15/03
摘要： In a magnet unit comprising a plurality of magnets arranged such that end faces of adjacent ones of the magnets lie in opposed relation, it is intended to enable a surface magnetic flux distribution to have a sinusoidal wave even at a position of an inter-edge gap. Disclosed is a rare-earth permanent magnet-forming sintered body having an integral sintered structure of magnet material particles containing a rare-earth substance. The integral sintered structure is formed in a three-dimensional shape having: a cross-section with a shape defined by a radially outer-side arc-shaped surface having a first curvature radius, a radially inner-side arc-shaped surface having a second curvature radius less than the first curvature radius and having an arc shape concentric with the outer-side arc-shaped surface; and a first end face and a second end face each of which is a radially-extending face along a virtual radial line extending from a curvature center of the arc shapes; and an axial length extending in a direction perpendicular to the cross-section. Each of the outer-side and inner-side arc-shaped surfaces has a circumferential length corresponding to an angular range 2ω between the two virtual radial lines defining, respectively, the first and second end faces. The magnet material particle are magnetized such that, among easy-to-magnetize axes thereof: easy-to-magnetize axes lying on a central radial line connecting the curvature center and a circumferential center point of the outer-side arc-shaped surface are oriented radially outwardly along the central radial line; easy-to-magnetize axes lying in a central region 2(1 - ε) ω, except for opposite end regions defined as two regions each extending over an angular range εω from a respective one of the first and second end faces, are oriented, at a position on an arbitrary radial line located at an angle θ from the central radial line, in a direction deviated from a radially outward direction along the arbitrary radial line, toward the central radial line by an angle Φ; and easy-to-magnetize axes lying in each of the end regions are oriented in a direction deviated radially outwardly at an angle greater than the angle Φ by 5° or more, wherein ε denotes a value falling within the following range: 0.1 ≤ ε ≤ 0.6, and Φ denotes an angle set based on the following formula: Φ = (90° - d) · θ / ω, where d denotes a constant set to an angle falling within the following range: 0°

4. 发明公开

EP3276795A1 RARE-EARTH PERMANENT MAGNET AND ROTARY MACHINE INCLUDING RARE-EARTH PERMANENT MAGNET 有权
标题翻译：稀土永磁和包括稀土永磁的旋转电机
公开(公告)号：EP3276795A1
公开(公告)日：2018-01-31
申请号：EP16768879.5
申请日：2016-03-24
申请人： Nitto Denko Corporation
发明人： FUJIHARA Makoto , FUJIKAWA Kenichi , YAMAMOTO Takashi , SAITO Shoichiro
IPC分类号： H02K1/27 , H01F7/02 , H02K1/22 , H02K15/03 , H01F1/057 , H01F1/08
CPC分类号： H02K1/2766 , B22F3/105 , C22C38/005 , H01F1/0536 , H01F1/0577 , H01F1/086 , H01F7/02 , H01F41/0273 , H02K1/22 , H02K1/27 , H02K15/03
摘要： It is intended to provide a permanent magnet usable in a rotary machine such as a permanent magnet-embedded electric motor, without deterioration in performance even when an external magnetic field exerting a demagnetization action is applied to the embedded permanent magnet. Disclosed are: a rare-earth permanent magnet-forming sintered body obtained by integrally sintering magnet material particles containing a rare-earth substance while shaping the magnet material particles, a rare-earth permanent magnet obtained by magnetizing the sintered body, and a rotary machine in which the permanent magnet is embedded. The rare-earth permanent magnet-forming sintered body is sectionalized into a widthwise central region, and first and second end regions located, respectively, on both sides of the central region. In the central region, easy magnetization axes of magnet material particles included in the central region are oriented in a direction substantially orthogonal to one surface of the sintered body extending in a width direction, and, in one or each of the first and second end regions, easy magnetization axes of magnet material particles included in the end region are oriented in directions along which they are converged such that a density of the magnet material particles whose easy magnetization axes are directed toward the one surface becomes greater in the end region than in the central region. In a magnet formed by this rare-earth permanent magnet-forming sintered body, a magnetic flux density in each of the end regions becomes greater than that in the central region, so that the deterioration in performance due to demagnetization is suppressed.
摘要翻译：本发明的目的在于提供一种即使在对嵌入的永久磁铁施加消磁作用的外部磁场的情况下也不会使性能降低的永久磁铁埋入型电动机等旋转机械所使用的永久磁铁。本发明提供一种稀土类永久磁铁形成用烧结体，其特征在于，使磁铁材料粒子成形的同时将含有稀土类物质的磁铁材料粒子一体烧结而成，将磁铁烧结而成的稀土类永久磁铁和旋转机械其中嵌入永磁体。稀土类永久磁铁形成烧结体被分割为宽度方向中央区域和分别位于中央区域两侧的第一端部区域和第二端部区域。在中央区域，中央区域所包含的磁铁材料粒子的易磁化轴在与宽度方向的烧结体的一个面大致正交的方向上取向，并且在第一以及第二端部区域包含在端部区域中的磁体材料粒子的易磁化轴沿着它们会聚的方向取向，使得易磁化轴朝向一个表面的磁体材料粒子的密度在端部区域中比在中央区域。在由该稀土类永久磁铁形成用烧结体构成的磁铁中，由于各端部区域的磁通密度大于中央区域的磁通密度，所以能够抑制因退磁引起的性能降低。

5. 发明公开

EP3276645A1 METHOD FOR PRODUCING SINTERED BODY THAT FORMS RARE-EARTH PERMANENT MAGNET AND HAS NON-PARALLEL EASY MAGNETIZATION AXIS ORIENTATION 有权
标题翻译：生产稀土永磁体烧结体的方法和具有非平行易磁化轴取向的方法
公开(公告)号：EP3276645A1
公开(公告)日：2018-01-31
申请号：EP16768881.1
申请日：2016-03-24
申请人： Nitto Denko Corporation
发明人： FUJIKAWA Kenichi , KUME Katsuya , OUCHI Kazuo , HOSHINO Toshinobu , MORIMOTO Masakazu , ONO Hirofumi , NAKABAYASHI Katsuyuki , YAMAGUCHI Miho , MATSUO Hiroshi , OKUNO Toshiaki , FUJIHARA Makoto , IMOTO Eiichi , EBE Hirofumi , OMURE Tomohiro , OZEKI Izumi , YAMAMOTO Takashi , KATO Yuki , MATSUDA Tomoya , SAITO Shoichiro
IPC分类号： H01F41/02 , H01F1/057 , H01F1/08 , H01F7/02 , H02K1/27
CPC分类号： H01F1/086 , H01F1/057 , H01F1/0577 , H01F7/02 , H01F41/0273 , H01F41/028 , H01F41/0293 , H02K1/27
摘要： Provided is a method for producing a sintered body that forms a rare-earth permanent magnet, has a single sintered structure and an arbitrary shape, and has easy magnetization axis orientations of different directions applied to the magnet material particles in a plurality of arbitrary regions. This method forms a three-dimensional first molded article from a composite material formed by mixing a resin material and magnet material particles containing a rare-earth substance. While keeping the first molded article at a temperature higher than the softening temperature of the resin, a parallel external magnetic field having parallel magnetic flux is imparted to the first molded article, and as a result, the axis of easy magnetization of the magnet material particles is oriented in parallel to the direction of the external magnetic field. Then, by subjecting the first molded article to a deforming force such as one that changes the horizontal cross-sectional shape of at least one section of a horizontal cross-section of the first molded article, a second molded article is formed in which the orientation direction of the easy magnetization axis of the magnet material particles in at least the one section of the horizontal cross-section is changed to a direction which differs from the orientation direction of the first molded article. The second molded article is heated to a sintering temperature and kept at the sintering temperature for a prescribed period of time. The resin inside the second molded article is vaporized, which forms a sintered body in which the magnet material particles are sintered to one another.
摘要翻译：本发明提供形成稀土类永久磁铁的烧结体的制造方法，该烧结体具有单一的烧结体和任意的形状，并且在多个任意的区域中对磁体材料粒子施加不同方向的易磁化轴取向。该方法由混合树脂材料和含有稀土类物质的磁铁材料粒子而成的复合材料形成三维的第一成形体。在将第一成形体保持在比树脂的软化温度高的温度的状态下，对第一成形体赋予平行磁通的平行的外部磁场，结果磁体材料粒子的易磁化轴被定向为平行于外部磁场的方向。然后，通过使第一模制品受到诸如改变第一模制品的水平横截面的至少一部分的水平横截面形状的变形力，形成第二模制品，其中取向水平截面的至少一部分中的磁体材料粒子的易磁化轴的方向改变为与第一模制品的取向方向不同的方向。将第二模塑制品加热到烧结温度并保持在烧结温度一段预定的时间。第二模制品内部的树脂被气化，形成其中磁体材料颗粒彼此烧结的烧结体。

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