公开(公告)号：US5159503A

公开(公告)日：1992-10-27

申请号：US531336

申请日：1990-05-31

申请人： Masahiro Mitamura ,  Takeo Iwai ,  Katsuhiro Tsuneta ,  Yoshinori Tuneda ,  Akihiro Nakamura

发明人： Masahiro Mitamura ,  Takeo Iwai ,  Katsuhiro Tsuneta ,  Yoshinori Tuneda ,  Akihiro Nakamura

IPC分类号： H02P5/52 ,  G11B19/28 ,  G11B27/00 ,  G11B27/10 ,  G11B27/28

CPC分类号： G11B19/28 ,  G11B27/002 ,  G11B27/10 ,  G11B27/28 ,  G11B2220/20

摘要： In a system equipped with a plurality of magnetic disk devices, one magnetic disk device is used as a device (master unit) for generating reference signals for rotating other plurality of devices in synchronism. Other one or more magnetic disk devices (slave units) are rotated in synchronism following the reference signals generated from the master unit. In order to maintain the synchronism of revolution between the master unit and the slave units, the conditions of revolution of the two spindle motors are compared to maintain the synchronism of revolution. Index pulses recorded on the magentic disks of the master unit and the slave units are used as reference signals for maintaining synchronism of revolutions. Index pulses from the master unit and the slave units are compared to find a phase difference signal and a period difference signal, and the rotational speed of the slave units is compensated by using these two signals.

摘要翻译： 在配备有多个磁盘装置的系统中，使用一个磁盘装置作为用于产生用于同步旋转其他多个装置的参考信号的装置（主单元）。 其他一个或多个磁盘设备（从属单元）按照从主单元产生的参考信号同步旋转。 为了保持主机与从机之间的转速同步，将两台主轴电动机的转速进行比较，保持转速同步。 记录在主单元和从单元的磁盘上的索引脉冲用作保持转数同步的参考信号。 比较来自主单元和从单元的索引脉冲以找到相位差信号和周期差信号，并且通过使用这两个信号来补偿从单元的转速。