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    Disk drive unit
    2.
    发明公开
    Disk drive unit 失效
    电动机和电动机。

    公开(公告)号：EP0509635A2

    公开(公告)日：1992-10-21

    申请号：EP92302048.1

    申请日：1992-03-11

    申请人： HITACHI, LTD. ,  JAPAN SERVO CO. LTD.

    发明人： Tajima, Fumio ,  Kanazawa, Hiroshi ,  Katayama, Hiroshi ,  Ohnishi, Kazuo ,  Takashashi, Tadashi ,  Mutoh, Nobuyoshi ,  Morinaga, Shigeki ,  Tsuboi, Nobuyoshi ,  Nihei, Hideki

    IPC分类号： H02K1/14 ,  H02K7/14 ,  H02K29/00 ,  H02K21/16 ,  G11B19/20 ,  G11B25/04 ,  G11B17/028 ,  G11B19/28 ,  G11B21/02 ,  H01L41/09 ,  G11B33/12

    CPC分类号： G11B25/043 ,  G11B19/20 ,  H02K1/14 ,  H02K1/146 ,  H02K7/14 ,  H02K16/00 ,  H02K21/16 ,  H02K41/03 ,  H02K2201/15

    摘要： A motor has a stator (4) and a rotor (3), the stator (4) having cores (9A) and drive coils (1) which generate magnetic fields for rotating the rotor (3). The stator (4) also has a yoke (9B,9C) surrounding the rotor (3) and the rotor (3) is positioned such that it is closer to one part (9B) of the outer periphery of the yoke than another part (9B) of the yoke. Such a motor is particularly suitable for use in a disk drive unit as a spindle motor (2) for rotating the disk (1). Then an actuator (12) for moving a head (11) may be located adjacent the part (9B) of the outer periphery of the yoke (9b,9C) which is closest to the rotor. This permits the head (11) to approach closely the axis of rotation of the disk (1) without the spindle motor (2) interfering with the movement of the head (11). The continuous yoke (9B,9C) prevents magnetic flux leakage from the spindle motor interfering with the actuator (12). The actuator (12) may itself have a yoke (9D) integral with the yoke (9B,9C) of the spindle motor (2), and/or other components in common.

    摘要翻译： 电动机具有定子（4）和转子（3），定子（4）具有芯（9A）和驱动线圈（1），其产生用于旋转转子（3）的磁场。 定子（4）还具有围绕转子（3）的轭（9B，9C），并且转子（3）被定位成使其更靠近轭的外周的一部分（9B）而不是另一部分 9B）。 这样的电动机特别适用于作为用于旋转盘（1）的主轴电机（2）的盘驱动单元。 然后，用于移动头部（11）的致动器（12）可以位于最接近转子的轭架（9b，9C）的外周的部分（9B）附近。 这使得头部11能够紧密地接近盘（1）的旋转轴线，而主轴马达（2）不影响头部（11）的运动。 连续轭（9B，9C）防止来自主轴电动机的磁通量泄漏干扰致动器（12）。 致动器（12）本身可以具有与主轴电机（2）的轭架（9B，9C）成一体的轭架（9D）和/或共同的其他部件。

    Permanent-magnet revolving electrodynamic machine with a concentrated stator winding
    6.
    发明公开
    Permanent-magnet revolving electrodynamic machine with a concentrated stator winding 失效
    永久性永久性永久磁铁

    公开(公告)号：EP0872943A1

    公开(公告)日：1998-10-21

    申请号：EP98302921.6

    申请日：1998-04-15

    申请人： Japan Servo Co. Ltd.

    发明人： Abukawa, Toshimi ,  Ohnishi, Kazuo ,  Suzuki, Hideaki ,  Ishii, Hitoshi ,  Abe, Keiichi

    IPC分类号： H02K1/14 ,  H02K21/16

    CPC分类号： H02K29/08 ,  H02K1/146 ,  H02K3/38 ,  H02K3/493 ,  H02K3/522 ,  H02K5/1732 ,  H02K16/04 ,  H02K21/16 ,  H02K2203/12

    摘要： A permanent-magnet electric rotating machine (1) with a concentrated winding stator, comprising: a stator (2) having a plurality of stator magnetic poles (51-62) formed so as to extend radially from an annular yoke portion (40) of a stator iron core (4), and windings (5) mounted on the stator magnetic poles; and a rotor (3) having a permanent magnet (21) with a plurality of magnetic poles and rotatably held so as to face the stator through an air gap. Each of the stator magnetic poles (51-62) has a straight shape having a width which is made constant over a whole length, small grooves (42a,42b) are formed in each of the stator magnetic poles in symmetrical positions on opposite sides and near a top end portion of the stator magnetic pole, a bottom portion of each slot portion defined by adjacent ones of the stator magnetic poles and the yoke is formed triangularly. Each of the stator windings (5) is constituted so that a winding having a predetermined number of turns and winding being formed so as to be fittable to each of the stator magnetic poles is mounted on the stator magnetic pole through an insulator (6), and wedges (13) are fitted to the small grooves (42) formed in the stator magnetic poles.

    摘要翻译： 一种具有集中绕组定子的永磁电动机（1），包括：定子（2），其具有多个定子磁极（51-62），所述定子磁极形成为从环形磁轭部分（40）径向延伸， 定子铁芯（4）和安装在定子磁极上的绕组（5）; 以及具有多个磁极的永磁体（21）的转子（3），并且通过气隙可旋转地保持为与定子相对。 每个定子磁极（51-62）具有在整个长度上恒定的宽度的直线形状，在每个定子磁极中在相对侧的对称位置形成有小的凹槽（42a，42b），并且 靠近定子磁极的顶端部分，由相邻的定子磁极和磁轭限定的每个槽部的底部形成为三角形。 每个定子绕组（5）被构造成使得具有预定匝数的绕组和形成为可配合到每个定子磁极的绕组被构造成通过绝缘体（6）安装在定子磁极上， 和楔形件（13）装配到形成在定子磁极中的小凹槽（42）上。

    Absolute encoder
    7.
    发明公开
    Absolute encoder 无效
    Absolutkodierer。

    公开(公告)号：EP0555961A1

    公开(公告)日：1993-08-18

    申请号：EP93300334.5

    申请日：1993-01-19

    申请人： JAPAN SERVO CO. LTD.

    发明人： Ichikawa, Misao ,  Ohnishi, Kazuo ,  Sekiguchi, Tokio

    IPC分类号： G01D5/249 ,  G01D5/16

    CPC分类号： G01D5/145 ,  G01D5/2497

    摘要： An absolute encoder wherein tracks (3-1, 3-2) are arranged side-by-side on a magnetic drum (1) in the axial direction thereof, and absolute patterns of circulatory random sequence codes are divided and recorded on the tracks (3-1, 3-2), respectively. An additional track (3-3) for generating sinewaves of two phases in synchronism with the reading of the absolute patterns is provided on the magnetic drum (1), so that an output can be obained by combining a coarse value of an absolute position obtained from the tracks (3-1, 3-2) and a fine value of an absolute position obtained from the additional track (3-3). The absolute patterns are detected from the two tracks (3-1, 3-2) recorded on the magnetic drum (1) by magnetic resistive elements (MR) connected with each other to form circuits each having a three-terminal. Terminals of the magnetic resistive elements (MR) are connected through a common line with an electric power source in order to prevent the lines from being crossed.

    摘要翻译： 其中轨道（3-1,3-2）沿其轴向方向并排布置在磁鼓（1）上的绝对编码器，并且将循环随机序列码的绝对模式划分并记录在轨道上 3-1,3-2）。 在磁鼓（1）上设置有用于与绝对图案的读取同步地产生两相正弦波的附加轨道（3-3），从而可以通过组合获得的绝对位置的粗略值来获得输出 从轨道（3-1,3-2）和从附加轨道（3-3）获得的绝对位置的精细值。 通过彼此连接的磁阻元件（MR）从记录在磁鼓（1）上的两个磁道（3-1,3-2）检测绝对图形，以形成各自具有三端的电路。 磁阻元件（MR）的端子通过与电源的公共线路连接，以防止线路交叉。

    Electric multipolar machine
    9.
    发明公开
    Electric multipolar machine 有权
    ELEKTRISCHE Mehrpolmaschine

    公开(公告)号：EP1517429A3

    公开(公告)日：2005-12-14

    申请号：EP04255743.9

    申请日：2004-09-22

    申请人： JAPAN SERVO CO. LTD.

    发明人： Ohnishi, Kazuo ,  Ohiwa, Shoji ,  Motegi, Yasuaki

    IPC分类号： H02K21/44

    CPC分类号： H02K37/18 ,  H02K37/20

    摘要： A multi-polar rotary machine comprising a stator; and a cylindrical outer rotor (10) arranged concentrically with the stator (6) and with an air gap therebetween. The stator (6) has two splitted stator elements (4, 5) and a ring shaped permanent magnet (3) held between the stator elements (4, 5) and magnetized so as to form N and S poles in the axial direction of the stator (6). A plurality of small stator teeth A and A ¯ and B ¯ and B separated in the axial direction of the stator (6) from each other, respectively, are formed on the outer peripheral surface of the splitted stator elements (4, 5). Stator windings (12, 13) for A phase and B phase are wound around the stator elements (4, 5), respectively. The rotor (10) has a plurality of small rotor teeth similar in number to the small stator teeth. The small stator teeth A, A ¯ , B ¯ and B are circumferentially shifted from said small rotor teeth by a 1/4 pitch of the small stator teeth, respectively. Each of the stator (6) and rotor (10) is formed of pressed powder consisting of soft magnetic material, and of resin and / or inorganic material. A ratio of a thickness of the small stator teeth A ¯ in the axial direction of the stator (6) to a thickness of the small stator teeth A in the axial direction of the stator (6) or a ratio of a thickness of the small stator teeth B ¯ in the axial direction of the stator to a thickness of the small stator teeth B in the axial direction of the stator (6) is set to a value smaller than 1 so as to equalize substantially in mean permeance both small stator teeth A and A ¯ or B ¯ and B to each other.

    Electric multipolar machine
    10.
    发明公开
    Electric multipolar machine 有权
    电动多极机

    公开(公告)号：EP1517429A2

    公开(公告)日：2005-03-23

    申请号：EP04255743.9

    申请日：2004-09-22

    申请人： JAPAN SERVO CO. LTD.

    发明人： Ohnishi, Kazuo ,  Ohiwa, Shoji ,  Motegi, Yasuaki

    IPC分类号： H02K21/44

    CPC分类号： H02K37/18 ,  H02K37/20

    摘要： A multi-polar rotary machine comprising a stator; and a cylindrical outer rotor (10) arranged concentrically with the stator (6) and with an air gap therebetween. The stator (6) has two splitted stator elements (4, 5) and a ring shaped permanent magnet (3) held between the stator elements (4, 5) and magnetized so as to form N and S poles in the axial direction of the stator (6). A plurality of small stator teeth A and A ¯ and B ¯ and B separated in the axial direction of the stator (6) from each other, respectively, are formed on the outer peripheral surface of the splitted stator elements (4, 5). Stator windings (12, 13) for A phase and B phase are wound around the stator elements (4, 5), respectively. The rotor (10) has a plurality of small rotor teeth similar in number to the small stator teeth. The small stator teeth A, A ¯ , B ¯ and B are circumferentially shifted from said small rotor teeth by a 1/4 pitch of the small stator teeth, respectively. Each of the stator (6) and rotor (10) is formed of pressed powder consisting of soft magnetic material, and of resin and / or inorganic material. A ratio of a thickness of the small stator teeth A ¯ in the axial direction of the stator (6) to a thickness of the small stator teeth A in the axial direction of the stator (6) or a ratio of a thickness of the small stator teeth B ¯ in the axial direction of the stator to a thickness of the small stator teeth B in the axial direction of the stator (6) is set to a value smaller than 1 so as to equalize substantially in mean permeance both small stator teeth A and A ¯ or B ¯ and B to each other.

    摘要翻译： 一种多极旋转机器，包括一个定子; 以及与定子（6）同心布置并且在其间具有气隙的圆柱形外转子（10）。 定子（6）具有两个分开的定子元件（4,5）和一个保持在定子元件（4,5）之间并且被磁化的环形永磁体（3），以沿着轴向方向形成N极和S极 定子（6）。 在分离的定子元件（4,5）的外周表面上分别形成有多个在定子（6）的轴向上彼此分离的小定子齿A和A'以及B和B。 A相和B相的定子绕组（12,13）分别围绕定子元件（4,5）缠绕。 转子（10）具有多个类似于小定子齿的小转子齿。 小定子齿A，A'，B'和B分别从所述小转子齿周向偏移小定子齿的1/4间距。 定子（6）和转子（10）中的每一个由由软磁性材料以及树脂和/或无机材料组成的压制粉末形成。 定子（6）的轴向上的小定子齿A'的厚度与定子（6）的轴向上的小定子齿A的厚度之比或者小于定子 定子的轴向上的定子齿B至定子（6）的轴向上的小定子齿B的厚度设定为小于1的值，从而基本上平均磁导率均小于两个小定子齿 A和A或B和B彼此相连。