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公开(公告)号：US4866554A
公开(公告)日：1989-09-12
申请号：US224077
申请日：1988-07-25
摘要： An automatic head retract system for a disk drive. The system operates in response to electric power turn off to retract the heads to a landing zone on the disk surface. The heads are retracted by operating a positioner motor under the control of logic internal to the disk drive unit without intervention by a host computer. The positioner motor comprises a multiphase DC brushless motor which, after power loss, is supplied with current from a capacitor charged during normal drive usage, and by the back EMF of a spindle motor. A latch mechanically locks the heads in the landing zone.
摘要翻译： 一种用于磁盘驱动器的自动磁头缩回系统。 该系统响应于电力关闭而操作，以将磁头缩回到盘表面上的着陆区。 在通过主机计算机的干预的情况下，通过在磁盘驱动器单元内部的逻辑控制下操作定位器电动机来使磁头缩回。 定位电动机包括一个多相直流无刷电动机，在断电后，从正常驱动使用期间充电的电容器和主轴电动机的反电动势供给电流。 闩锁将头部机械地锁定在着陆区域。
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公开(公告)号：US4786995A
公开(公告)日：1988-11-22
申请号：US927916
申请日：1986-11-06
CPC分类号： G11B19/2081 , G11B21/12
摘要： An automatic head retract system for a disk drive is disclosed which operates in response to electric power turn off to retract the heads to a landing zone on the disk surface. The heads are retracted by operating a positioner motor under the control of logic internal to the disk drive unit without intervention by a host computer. The positioner motor comprises a multiphase DC brushless motor which, after power loss, is supplied with current from a capacitor charged during normal drive usage and by the back EMF of a spindle motor. A latch mechanically locks the heads in the landing zone.
摘要翻译： 公开了一种用于磁盘驱动器的自动磁头缩回系统，其响应于电力关闭而操作，以将磁头缩回到盘表面上的着陆区域。 在通过主机计算机的干预的情况下，通过在磁盘驱动器单元内部的逻辑控制下操作定位器电动机来使磁头缩回。 定位电动机包括一个多相直流无刷电动机，在断电后，从正常驱动使用期间充电的电容器和主轴电动机的反电动势供给电流。 闩锁将头部机械地锁定在着陆区域中。
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