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    • 26. 发明授权
    • Disk drive device rotationally driving recording disk
    • 磁盘驱动装置旋转驱动记录盘
    • US08368282B2
    • 2013-02-05
    • US12691709
    • 2010-01-21
    • Minoru SanoTetsuo Kitamura
    • Minoru SanoTetsuo Kitamura
    • H02K21/04
    • H02K21/22G11B19/2009H02K29/03
    • A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2). In the disk drive device, the fundamental frequency component of the cogging torque based on the LCM (Least Common Multiple) of S and P (where S is the number of the salient poles of the core and P is the number of the driving magnetic poles of the magnet), is smaller than the second frequency component of the cogging torque, the frequency of which is twice the fundamental frequency.
    • 磁盘驱动器装置包括:记录盘安装在其上的集线器; 基座,其构造成通过轴承可旋转地支撑所述轮毂; 固定在所述基座上并且包括从所述直径方向上的所述圆形部分延伸的圆形部分和S凸极(其中S是大于或等于3的自然数)的芯; 通过缠绕在每个S凸极上形成的三相线圈; 以及固定到轮毂并且在直径方向上面对S凸极的磁体,并且在圆周方向(其中P是大于或等于2的自然数)设置有P个驱动磁极。 在磁盘驱动装置中,基于S和P的LCM(最小公倍数)的齿槽转矩的基频分量(其中S是磁芯的凸极数,P是驱动磁极的数量 的磁体)小于齿槽转矩的第二频率分量,其频率是基频的两倍。
    • 27. 发明申请
    • DISK DRIVE DEVICE ROTATIONALLY DRIVING RECORDING DISK
    • 磁盘驱动装置旋转驱动记录盘
    • US20100238591A1
    • 2010-09-23
    • US12691709
    • 2010-01-21
    • Minoru SanoTetsuo Kitamura
    • Minoru SanoTetsuo Kitamura
    • G11B15/64H02K21/22
    • H02K21/22G11B19/2009H02K29/03
    • A disk drive device includes: a hub on which a recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a core that is fixed to the base and includes a circular portion and S salient poles (where S is a natural number greater than or equal to 3) extending from the circular portion in the diameter direction; a three-phase coil that is formed by being wound around each of the S salient poles; and a magnet that is fixed to the hub and faces the S salient poles in the diameter direction, and that is provided with P driving magnetic poles in the circumferential direction (where P is a natural number greater than or equal to 2). In the disk drive device, the fundamental frequency component of the cogging torque based on the LCM (Least Common Multiple) of S and P (where S is the number of the salient poles of the core and P is the number of the driving magnetic poles of the magnet), is smaller than the second frequency component of the cogging torque, the frequency of which is twice the fundamental frequency.
    • 磁盘驱动器装置包括:记录盘安装在其上的集线器; 基座,其构造成通过轴承可旋转地支撑所述轮毂; 固定在所述基座上并且包括从所述直径方向上的所述圆形部分延伸的圆形部分和S凸极(其中S是大于或等于3的自然数)的芯; 通过缠绕在每个S凸极上形成的三相线圈; 以及固定到轮毂并且在直径方向上面对S凸极的磁体,并且在圆周方向(其中P是大于或等于2的自然数)设置有P个驱动磁极。 在磁盘驱动装置中,基于S和P的LCM(最小公倍数)的齿槽转矩的基频分量(其中S是磁芯的凸极数,P是驱动磁极的数量 的磁体)小于齿槽转矩的第二频率分量,其频率是基频的两倍。