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1. 发明授权

US4959733A Motor rotation control apparatus with motor rotational frequency memory 失效
标题翻译：电机旋转控制装置，带电机转速记忆
公开(公告)号：US4959733A
公开(公告)日：1990-09-25
申请号：US194303
申请日：1988-05-16
申请人： Yoshio Miura , Motoyuki Suzuki , Akio Fukushima , Yonemitu Mori
发明人： Yoshio Miura , Motoyuki Suzuki , Akio Fukushima , Yonemitu Mori
IPC分类号： H02P29/00 , G11B19/28
CPC分类号： G11B19/28
摘要： An apparatus for controlling the rotation of a motor to rotate a recording medium where an information signal and synchronizing signal are recorded. In such motor rotation control, normally the synchronizing signal reproduced from the recording medium is phase-compared with a reference synchronizing signal, and the motor rotation is so controlled as to eliminate the phase error between the two compared signals. And upon occurrence of any great variation in the motor rotation due to information dropout or the like on the recording medium, such variation is detected, and a rotational frequency signal obtained from a rotational frequency detector is phase-compared with a reference frequency signal generated on the basis of the data relative to the motor rotational frequency stored sequentially in a memory. Then the control mode is switched for controlling the motor rotation in such a manner as to eliminate the phase error between the two compared signals, whereby the problems including runaway of the motor and so forth can be solved.
摘要翻译：一种用于控制电动机的旋转以旋转记录介质的装置，其中记录信息信号和同步信号。在这样的电动机旋转控制中，通常将从记录介质再现的同步信号与参考同步信号进行相位比较，并且控制电机旋转以消除两个比较信号之间的相位误差。并且，由于记录介质上的信息丢失等引起的电动机旋转发生任何大的变化，检测到这种变化，并且从旋转频率检测器获得的旋转频率信号与在相对于依次存储在存储器中的电动机旋转频率的数据的基础。然后切换控制模式以控制电动机旋转，以消除两个比较信号之间的相位误差，从而可以解决包括电动机等的失控的问题。

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