公开(公告)号：US5908578A

公开(公告)日：1999-06-01

申请号：US760962

申请日：1996-12-05

Applicant: Yoichi Nishimuro ,  Muneori Iizuka ,  Kunio Machida ,  Hideharu Daifuku

Inventor： Yoichi Nishimuro ,  Muneori Iizuka ,  Kunio Machida ,  Hideharu Daifuku

IPC: G03G15/09 ,  H01F1/055 ,  H01F1/057 ,  H01F1/08 ,  H01F7/02 ,  G03G15/06

CPC classification number: H01F1/083 ,  G03G15/0921 ,  H01F1/0558 ,  H01F1/0578 ,  H01F7/0268

Abstract: A bonded magnet featuring mechanical strength is obtained from a bonded magnet-forming composition comprising magnetic powder and a binder wherein the binder is based on highly crystalline polypropylene in one form or contains a modified polyolefin in another form. Also provided is a magnet roller comprising a magnet body (1) of bonded magnet configured into a roller shape and a shaft (2) associated therewith wherein at least the magnet body (1) is formed from the bonded magnet-forming composition.

公开(公告)号：US5019796A

公开(公告)日：1991-05-28

申请号：US455117

申请日：1989-12-22

Applicant: James K. Lee ,  Donald J. McJury ,  Michael A. Pickup ,  Kelly S. Robinson

Inventor： James K. Lee ,  Donald J. McJury ,  Michael A. Pickup ,  Kelly S. Robinson

IPC: G03G15/09 ,  H01F7/02 ,  H01F13/00

CPC classification number: G03G15/0921 ,  H01F13/003 ,  H01F7/0268

Abstract: An improved bar magnet and method of construction, and an improved magnetic core comprising an assembly of such magnets, for use in a processing station of an electrostatographic printing machine. The improved bar magnet is formed of permanent magnet material having magnetic domains therein that are magnetized along epicycloidal curve segments. The external magnetic flux density is improved over that of a conventionally-magnetized magnet. An injection mold for inducing the particular epicycloidal alignment of magnetic domains in the improved bar magnet is provided.

Abstract translation: 一种改进的棒状磁体和构造方法，以及一种改进的磁芯，包括这种磁体的组件，用于静电印刷机的处理站。 改进的棒状磁体由其中具有磁畴的永磁体材料形成，其沿着外部曲线段被磁化。 外部磁通密度比常规磁化磁体的磁通密度提高。 提供了一种用于在改进的棒状磁体中诱导磁畴的特定外部取向对准的注射模具。

公开(公告)号：US20180097410A1

公开(公告)日：2018-04-05

申请号：US15565110

申请日：2016-04-07

Applicant: VALEO EQUIPEMENTS ELECTRIQUES MOTEUR

Inventor： Jean-Marc DUBUS ,  Nicolas LABBE

IPC: H02K1/17 ,  H02K1/02 ,  H02K21/14 ,  H01F13/00 ,  H02K15/03 ,  H01F41/02 ,  H01F7/02

CPC classification number: H02K1/17 ,  H01F7/0268 ,  H01F13/003 ,  H01F41/0273 ,  H02K1/02 ,  H02K15/03 ,  H02K21/14 ,  H02K23/04

Abstract: The invention relates to a starter for a motor vehicle heat engine. The starter includes a rotary electric machine provided with a stator (3). The stator (3) includes a magnetic pole assembly wherein a permanent magnet (5) forms at least two poles of the magnetic pole assembly. The permanent magnet may have a cylindrical shape and be molded from a combination of magnetic particles embedded within a non-magnetic binder. Using this structure, the number of magnets used to create the stator may be limited in number, thereby limiting the necessary assembly steps to create the stator.

公开(公告)号：US09761396B2

公开(公告)日：2017-09-12

申请号：US15115701

申请日：2015-01-30

Applicant: Ixtur Oy

Inventor： Reijo Nätti

IPC: B66C1/04 ,  H01F7/02 ,  G01D5/14 ,  B25B11/00 ,  H01H36/00 ,  H01F7/04 ,  H01F7/16 ,  G01D5/12

CPC classification number: H01H36/0006 ,  G01D5/12 ,  H01F7/0205 ,  H01F7/0226 ,  H01F7/0252 ,  H01F7/0257 ,  H01F7/0268 ,  H01F7/04 ,  H01F7/1615 ,  H01F2007/1669

Abstract: The present invention provides a magnet, which comprises a body having a first and a second section, and a slide arranged to be movable relative to the body between a first and a second position. The slide comprises a permanent magnet, and a first and a second pole piece that are attached to opposite magnetic pole surfaces of the permanent magnet. The first section comprises a hole that opens into a first cavity of the body, the bottom of the first cavity being delimited at least partly by the second section. The slide is movably arranged in the hole so that the second pole piece is directed towards the bottom of the first cavity, wherein at the first position of the slide, magnetic flux generated by the permanent magnet is short-circuited by the first section, and at the second position of the slide, magnetic flux generated by the permanent magnet is directed through the first and the second section.

公开(公告)号：US20170011876A1

公开(公告)日：2017-01-12

申请号：US15115701

申请日：2015-01-30

Applicant: IXTUR Oy

Inventor： Reijo NATTI

IPC: H01H36/00 ,  G01D5/12 ,  H01F7/02

CPC classification number: H01H36/0006 ,  G01D5/12 ,  H01F7/0205 ,  H01F7/0226 ,  H01F7/0252 ,  H01F7/0257 ,  H01F7/0268 ,  H01F7/04 ,  H01F7/1615 ,  H01F2007/1669

Abstract: The present invention provides a magnet, which comprises a body having a first and a second section, and a slide arranged to be movable relative to the body between a first and a second position. The slide comprises a permanent magnet, and a first and a second pole piece that are attached to opposite magnetic pole surfaces of the permanent magnet. The first section comprises a hole that opens into a first cavity of the body, the bottom of the first cavity being delimited at least partly by the second section. The slide is movably arranged in the hole so that the second pole piece is directed towards the bottom of the first cavity, wherein at the first position of the slide, magnetic flux generated by the permanent magnet is short-circuited by the first section, and at the second position of the slide, magnetic flux generated by the permanent magnet is directed through the first and the second section.

Abstract translation: 本发明提供一种磁体，其包括具有第一和第二部分的本体，以及布置成可在第一和第二位置之间相对于主体移动的滑块。 滑块包括永磁体，以及附接到永磁体的相对的磁极表面的第一和第二极靴。 第一部分包括通向主体的第一腔的孔，第一腔的底部至少部分地由第二部分限定。 滑块可移动地布置在孔中，使得第二极靴指向第一腔的底部，其中在滑块的第一位置处，由永磁体产生的磁通量被第一部分短路，并且 在滑块的第二位置处，由永磁体产生的磁通量通过第一和第二部分。

公开(公告)号：US08937419B2

公开(公告)日：2015-01-20

申请号：US12666245

申请日：2008-06-23

Applicant: Nobuyuki Hirai ,  Mitsutoshi Natsumeda

Inventor： Nobuyuki Hirai ,  Mitsutoshi Natsumeda

IPC: H02K21/12 ,  H01F1/057 ,  H02K15/16 ,  H01F41/02 ,  H02K1/27 ,  H02K15/03 ,  H01F7/02

CPC classification number: H01F1/057 ,  H01F1/0576 ,  H01F7/02 ,  H01F7/021 ,  H01F7/0268 ,  H01F41/0266 ,  H01F41/0273 ,  H01F41/028 ,  H02K1/2733 ,  H02K15/03 ,  H02K21/14 ,  Y10T29/49009 ,  Y10T29/49012

Abstract: A method for producing a radially anisotropic ring magnet having at least one axial groove on the inner surface comprises using a die comprising a cylindrical, magnetic core, a magnetic sleeve having an axial ridge in alignment with the groove on the outer surface and disposed on an outer peripheral surface of the core, and an outer, cylindrical die member defining a cavity for forming the ring magnet with the magnetic sleeve, and compression-molding magnet powder charged into the cavity while applying a magnetic field in a radial direction, and a radially anisotropic ring magnet substantially having a composition of R-TM-B, wherein R is at least one of rare earth elements including Y, TM is at least one of transition metals, and B is boron, having at least one axial groove on the inner surface, and magnetized such that centerlines between magnetic poles do not overlap grooves.

Abstract translation: 一种用于制造在内表面上具有至少一个轴向凹槽的径向各向异性环形磁体的方法包括使用包括圆柱形磁芯的模具，具有与外表面上的凹槽对准的轴向脊的磁性套筒， 芯部的外周表面和外圆柱形模具构件，其限定用于用磁性套筒形成环形磁体的空腔，以及在径向施加磁场的同时将电荷加入到腔中的压缩成型磁体粉末， 基本上具有R-TM-B组成的各向异性环形磁体，其中R是至少一种包括Y的稀土元素，TM是过渡金属中的至少一种，B是硼，在内部具有至少一个轴向凹槽 表面和磁化，使得磁极之间的中心线不重叠凹槽。

公开(公告)号：US07948135B2

公开(公告)日：2011-05-24

申请号：US12574046

申请日：2009-10-06

Applicant: Koji Sato ,  Mitsuo Kawabata ,  Takehisa Minowa

Inventor： Koji Sato ,  Mitsuo Kawabata ,  Takehisa Minowa

IPC: H02K1/27 ,  H01F1/032

CPC classification number: H01F7/0268 ,  H01F41/0266 ,  H01F41/028

Abstract: A radial anisotropic sintered magnet formed into a cylindrical shape includes a portion oriented in directions tilted at an angle of 30° or more from radial directions, the portion being contained in the magnet at a volume ratio in a range of 2% or more and 50% or less, and a portion oriented in radial directions or in directions tilted at an angle less than 30° from radial directions, the portion being the rest of the total volume of the magnet. The radial anisotropic sintered magnet has excellent magnet characteristics without occurrence of cracks in the steps of sintering and cooling for aging, even if the magnet has a shape of a small ratio between an inner diameter and an outer diameter.

Abstract translation: 形成为圆筒状的径向各向异性烧结磁体包括从径向倾斜30°以上的方向取向的部分，磁体中的部分以2％以上的体积比容纳在50％以上 ％以下的部分，以及沿径向方向或以与径向小于30°的角度倾斜的方向的部分，该部分是磁体总体积的其余部分。 径向各向异性烧结磁体即使磁体具有内径和外径之间的小比例的形状，也具有优异的磁体特性，而不会在老化烧结和冷却步骤中产生裂纹。

公开(公告)号：US20080246572A1

公开(公告)日：2008-10-09

申请号：US11569997

申请日：2005-05-23

Applicant: Masaharu Iwai

Inventor： Masaharu Iwai

IPC: H01F7/02

CPC classification number: G03G15/0921 ,  H01F1/113 ,  H01F7/0268 ,  H01F41/0266 ,  H01F41/028

Abstract: In a magnet roller of the magnet piece bonding type, the main pole has a high magnetic flux density and the other pole has an asymmetric magnetic flux density pattern with respect to the magnetic flux density peak position. The magnet piece of the main pole is formed by injection molding while performing pole-anisotropic orientation of magnetic particles of the magnet piece. The magnet piece of the other pole is formed by extrusion molding while orientating the magnetic particles in a certain direction inclined by 5 degrees of more with respect to the center line of the radial direction of the magnet piece. The magnet roller is formed by combining the magnet piece of the main pole and the magnet piece of the other pole.

Abstract translation: 在磁片接合型的磁辊中，主极具有高磁通密度，另一极相对于磁通密度峰值位置具有非对称磁通密度图案。 主极的磁片通过注射成型而形成，同时执行磁体的磁性颗粒的极各向异性取向。 另一极的磁片通过挤出成型而形成，同时使磁性颗粒沿相对于磁体的径向方向的中心线倾斜5度的一定方向。 磁辊是通过将主极的磁体片和另一极的磁体片组合而形成的。

公开(公告)号：US20070170801A1

公开(公告)日：2007-07-26

申请号：US10589235

申请日：2005-06-20

Applicant: Koji Sato ,  Takehisa Minowa

Inventor： Koji Sato ,  Takehisa Minowa

IPC: H01F1/03 ,  H02K21/12 ,  H01F13/00

CPC classification number: H01F7/0268 ,  H01F1/0577 ,  H01F41/028 ,  H02K1/2733 ,  H02K15/03 ,  Y10T29/49009

Abstract: In a radially anisotropic sintered magnet of annular shape, the remanence in a radial direction of the annulus increases and decreases at intervals of 90° in a circumferential direction of the annulus, and the remanence in a radial direction over the entire circumference of the annulus has a maximum of 0.95-1.60 T and a minimum equal to 50-95% of the maximum. In a permanent magnet motor comprising a plurality of stator teeth, the radially anisotropic annular sintered magnet is incorporated after it is magnetized in 4n poles (wherein n is an integer of 1 to 20) so that the boundary between N and S poles is located within the range that is centered at the radial direction where the remanence exhibits the minimum and extends ±10° therefrom in a circumferential direction. The radially anisotropic annular sintered magnet undergoes neither fracture nor cracking during the sintering and aging/cooling steps even when it is shaped to a low inner/outer diameter ratio and has satisfactory magnetic properties. A permanent magnet motor comprising the radially anisotropic annular sintered magnet is inexpensive and of high performance.

Abstract translation: 在圆环状的径向各向异性烧结磁体中，环形空间的径向的剩磁在圆环的圆周方向以90°的间隔增大和减小，并且在环的整个圆周上的径向的剩余磁场具有 最大值为0.95-1.60 T，最小值为最大值的50-95％。 在包括多个定子齿的永磁电动机中，径向各向异性环形烧结磁体在4n极（其中n为1〜20的整数）被磁化后并入，使得N极和S极之间的边界位于 在径向方向上以剩余为最小的范围为中心，在圆周方向上延伸±10°。 径向各向异性环状烧结磁体在烧结和老化/冷却步骤期间既不会发生断裂也不起裂，即使成形为低内/外径比并且具有令人满意的磁特性。 包括径向各向异性环形烧结磁体的永磁电动机是廉价且高性能的。

公开(公告)号：US07178780B2

公开(公告)日：2007-02-20

申请号：US10815073

申请日：2004-03-31

Applicant: Paul F. Mastro ,  Christopher D. Blair ,  Jennifer R. Wagner ,  Jay Schneider

Inventor： Paul F. Mastro ,  Christopher D. Blair ,  Jennifer R. Wagner ,  Jay Schneider

IPC: B29C33/38

CPC classification number: H01F7/0268 ,  B29C33/56 ,  B29C45/37 ,  H01F41/0266

Abstract: A mold used to form a magnetic member includes a mold body having a mold opening, a mold support that supports the mold cavity, and a mold insert. The mold insert is disposed in the mold opening of the mold body to form a mold cavity. The mold insert is coated with a coating to protect the mold body from chemical attack and abrasive wear of the mold material. The coating comprises an electroless nickel layer formed on or over the mold insert, and a chromium nitride layer formed on or over the electroless nickel layer. The mold insert can be formed of beryllium-copper (Be—Cu).

Abstract translation: 用于形成磁性构件的模具包括具有模具开口的模具主体，支撑模腔的模具支撑件和模具插入件。 模具插入件设置在模具主体的模具开口中以形成模腔。 模具插入件涂覆有涂层以保护模具体免受模具材料的化学侵蚀和磨损磨损。 涂层包括形成在模具插入件上或上方的无电镍层，以及形成在无电镀镍层上或之上的氮化铬层。 模具插入件可以由铍铜（Be-Cu）形成。