| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor control device that acquires a proper signal without a delay by removing a noise component from a signal required for control of the rotational frequency of a motor and executes accurate feedback control of the rotational frequency (rotational speed) of the motor on the basis of the signal. <P>SOLUTION: The motor control device 9 executes feedback control of a motor 90 on the basis of the rotational frequency of the motor 90 calculated by a speed calculating part 92 on the basis of a pulse signal. The motor control device includes a noise removing part 91 that calculates a predicted value of the next edge-detection timing from edge-detection timing of the past pulse signals so as to set a range of prescribed allowable values on the basis of the predicted value, inputs a pulse signal, in which an edge is detected within the range of the allowable values, to the speed calculating part 92 as a proper one, and eliminates a pulse signal in which an edge is detected beyond the range of the allowable values as an improper one. <P>COPYRIGHT: (C)2010,JPO&INPIT |
