| 摘要 |
<p>A motor control device is used for controlling a DC motor (30) for secondary paper feeding in, for example, a copying machine. Secondary paper feeding of paper to a transfer drum (18) is achieved by the dedicated DC motor (30). The DC motor (30) is rotated at a high speed at the time of starting the secondary paper feeding and is decelerated up to a process speed after a constant time. At the time of the deceleration, the control device applies a short-circuiting brake to the motor (30). In the short-circuiting brake, there is no variation in braking, thereby to make it possible to reliably decrease the speed of the motor (30). The braking is released at the timing at which an FG clock corresponding to the rotation of the motor (30) is synchronized with a command clock representing the process speed. Consequently, a braking operation is reliably released the instant the speed of the motor (30) reaches a desired process speed. <IMAGE></p> |
