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    • 28. 发明公开
    • Disk drive unit
    • 电动机和电动机。
    • EP0509635A2
    • 1992-10-21
    • EP92302048.1
    • 1992-03-11
    • HITACHI, LTD.JAPAN SERVO CO. LTD.
    • Tajima, FumioKanazawa, HiroshiKatayama, HiroshiOhnishi, KazuoTakashashi, TadashiMutoh, NobuyoshiMorinaga, ShigekiTsuboi, NobuyoshiNihei, Hideki
    • H02K1/14H02K7/14H02K29/00H02K21/16G11B19/20G11B25/04G11B17/028G11B19/28G11B21/02H01L41/09G11B33/12
    • G11B25/043G11B19/20H02K1/14H02K1/146H02K7/14H02K16/00H02K21/16H02K41/03H02K2201/15
    • 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.
    • 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。
    • 30. 发明公开
    • Speed control apparatus for movable equipment
    • Vorrichtung zur GeschwindigkeitsregelungfürbeweglichesGerät。
    • EP0382166A1
    • 1990-08-16
    • EP90102313.5
    • 1990-02-06
    • HITACHI, LTD.
    • Tajima, FumioKatayama, HiroshiMiyashita, KunioMorinaga, ShigekiNarushima, Seiichi
    • H02P6/02
    • H02P6/10H02P6/006H02P6/06Y10S388/906
    • In order to provide a speed control apparatus for a movable equipment having small torque ripples and speed variation, the present invention has a speed control means which comprises a driver (INV) for provid­ing a current or a voltage having a magnitude corre­sponding to the instructed speed, a speed detection circuit (COUNT) for detecting a speed on the basis of a signal from the speed detector and a microcomputer (MC) for driving the driver (INV) by comparing the speed instruction signal with a speed signal obtained from the speed detection circuit (COUNT). The microcomputer includes a harmonic wave component detecting means for detecting a harmonic wave component contained in a speed variation mode which is obtained from the speed detec­tion circuit and has a function of making the gain of a speed control system variable by the harmonic wave component detected by the harmonic wave component detecting means.
    • 为了提供具有小的扭矩波动和速度变化的可移动设备的速度控制装置,本发明具有速度控制装置,其包括用于提供具有对应于指令速度的大小的电流或电压的驱动器(INV) ,用于基于来自速度检测器的信号检测速度的速度检测电路(COUNT)和用于通过将速度指令信号与从速度检测器获得的速度信号进行比较来驱动驾驶员(INV)的微计算机(MC) 电路(COUNT)。 微型计算机包括:谐波分量检测装置,用于检测从速度检测电路获得的速度变化模式中包含的谐波成分,并且具有使由速度控制系统的增益变化的功能,该速度控制系统的增益由通过 谐波分量检测装置。