公开(公告)号：US5008573A

公开(公告)日：1991-04-16

申请号：US482807

申请日：1990-02-21

申请人： Osamu Beppu ,  Toshihiro Moribe ,  Youjiro Tezuka ,  Akira Chuma

发明人： Osamu Beppu ,  Toshihiro Moribe ,  Youjiro Tezuka ,  Akira Chuma

IPC分类号： G11B19/20 ,  G11B25/04 ,  H02K29/00 ,  H02K29/08

CPC分类号： H02K29/08 ,  G11B19/2009 ,  G11B25/043

摘要： A motor for a disc drive unit is spatially separated from an enclosure housing the magnetic disks and read-write heads. The disks are mounted on a hub that is fixed to a shaft extending through the hub, having bearings at either end of the shaft. One end of the shaft extends outside of the enclosure, the rotor of the motor is fixed to this end of the shaft and is concentric therewith. The rotor has a rotor housing that is cup-shaped, with an opening facing away from the interior of the enclosure. Inwardly of the rotor housing is a stator mounted on a supporting member. The supporting member is detachably mounted to the enclosure for easy access to the stator. Further, a circuit board having control elements for the motor, including a Hall element mounted thereon, is provided on the supporting member for easy access to the circuit board. Each of the coils of the stator is divided into windings, and the controller for the motor switches the number of windings used so that more of the windings are used for each coil during start-up than during the running condition, when less work is needed.

摘要翻译： 用于盘驱动单元的电动机与容纳磁盘和读写头的外壳在空间上分离。 盘被安装在固定到延伸穿过轮毂的轴上的毂上，在轴的任一端具有轴承。 轴的一端延伸到外壳的外部，电动机的转子固定在轴的这一端并与其同心。 转子具有杯形的转子壳体，其开口背向外壳的内部。 在转子壳体的内部是安装在支撑构件上的定子。 支撑构件可拆卸地安装到外壳上，以便于接近定子。 此外，具有安装在其上的霍尔元件的电动机控制元件的电路板设置在支撑部件上，以便于接近电路板。 定子的每个线圈被分成绕组，并且用于电动机的控制器切换所使用的绕组数量，使得在启动期间使用更多的绕组用于每个线圈，而不是在运行条件期间，当需要较少的工作时 。