| 摘要 |
PURPOSE: To perform stable braking by starting plugging when a revolution speed is not less than a predetermined value after dynamic braking starts and predetermined time elapses. CONSTITUTION: A motor control device 10 is provided with a microcomputer 20 for controlling a motor 12 through a driving circuit 18 on the basis of the target signal SA of the revolution speed of the motor 12 by stepping an accelerator 14 and an actual revolution speed signal SR outputted by the revolution speed sensor 16 of the motor 12. The microcomputer 20 usually controls the motor 12 through the driving circuit 18 so that the signal SA accords with the signal SR, but when the acceleration signal SA is a zero, namely, a stop signal is outputted, the dynamic braking relative to the motor 12 is started. When the rotational signal SR after predetermined time elapses is not more than a reference value Rt, deceleration is sufficient, so that the dynamic braking is continued, but when it is not less than the reference value Rt, deceleration is insufficient, so that plugging is started. Thereby, stable braking can be performed. |
