公开(公告)号：US6128153A

公开(公告)日：2000-10-03

申请号：US805161

申请日：1997-02-24

申请人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

发明人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

IPC分类号： G11B21/10 ,  G11B5/596

CPC分类号： G11B5/59627

摘要： Head position control is implemented in a disk drive for the case in which a disk is assembled into the disk drive after a precise track is recorded onto it using an external apparatus, which is capable of high-speed access even if there is eccentricity between a track defined by servo information and the center of rotation of the track. Two phase servo bursts consisting of servo information are recorded onto each of the servo information regions of a disk surface, in mutual alternation, the strength ratio between signals detected from these two phase servo bursts being used to determine to which side the head is displaced. By performing control so that this strength ratio is a prescribed value at each angular position, control is achieved so that the head moves along a circular path of rotation, even if there is eccentricity in the servo circular path defined by the recorded servo information with respect to the center of rotation.

摘要翻译： 在磁盘驱动器中实现磁头位置控制，其中在使用外部设备将精确磁道记录在其上之后将磁盘组装到磁盘驱动器中的情况下，其能够高速访问，即使在 由伺服信息定义的轨道和轨道的旋转中心。 由伺服信息组成的两相伺服脉冲串相互交替地记录在盘表面的每个伺服信息区域上，从这两个相位伺服脉冲串检测的信号之间的强度比用于确定磁头移位到哪一侧。 通过进行各个角度位置的强度比为规定值的控制，即使在由所记录的伺服信息确定的伺服圆形路径中存在偏心，也能够沿着圆形的旋转路径进行控制 到旋转中心。

公开(公告)号：US5519270A

公开(公告)日：1996-05-21

申请号：US106723

申请日：1993-08-16

申请人： Tomoyoshi Yamada ,  Yoshifumi Mizoshita ,  Keiji Aruga

发明人： Tomoyoshi Yamada ,  Yoshifumi Mizoshita ,  Keiji Aruga

IPC分类号： G11B19/20 ,  G11B25/04 ,  H02K1/02 ,  H02K1/14 ,  H02K1/18 ,  H02K3/26 ,  H02K3/52 ,  H02K5/124 ,  H02K15/02 ,  H02K21/12 ,  H02K21/14 ,  H02K21/22 ,  H02K7/14 ,  G11B17/08 ,  H02K1/12

CPC分类号： H02K3/522 ,  G11B19/2009 ,  G11B25/043 ,  H02K1/146 ,  H02K1/148 ,  H02K15/022 ,  H02K21/12 ,  H02K3/26 ,  H02K1/02 ,  H02K1/18 ,  H02K21/14 ,  H02K21/22 ,  H02K2201/12 ,  H02K2203/03 ,  H02K2203/12 ,  H02K5/124

摘要： A spindle motor includes a permanent magnet multipolarized in a circular direction of the permanent magnet. The permanent magnet generates magnetic fluxes in a radial direction of the spindle motor. A core assembly has core pieces, the core pieces respectively including first portions are circularly arranged and face the permanent magnet via a gap, and second portions guide magnetic fluxes in parallel with a rotation axis of the spindle motor. Windings are turned around the second portions of the core assembly and have axes of the windings extending in parallel with the rotation axis of the spindle motor. A yoke magnetically couples the core pieces with each other.

摘要翻译： 主轴电动机包括在永磁体的圆周方向上多极化的永磁体。 永久磁铁在主轴电动机的径向方向产生磁通。 芯组件具有芯片，分别包括第一部分的芯片部分被圆形布置并且经由间隙面对永磁体，并且第二部分引导与主轴电动机的旋转轴线平行的磁通量。 绕组绕着芯组件的第二部分转动，并且绕组的轴线与主轴电机的旋转轴线平行延伸。 磁轭将磁芯彼此磁耦合。