| 摘要 |
PURPOSE:To accurately stop a motor with a simple structure by stopping the operation of a drive circuit when the difference between the actual rotating speed of a motor and the set rotating speed reaches the prescribed value, braking it and thereafter operating the drive circuit to rotate the motor at the low speed. CONSTITUTION:The difference between the actual rotating speed of a motor and the rotating speed set in advance by a rotating speed setter 3 is calculated by a subtractor 2, and when this difference reaches the preset value, the operation of a drive circuit 5 is stopped by a DC motor rotation controller 1. Simultaneously, the motor 8 is braked by a brake controller 4. When the inertial force of the motor 8 decreases, a low speed rotation command is outputted from the controller 1 to a drive circuit, and the motor 8 starts rotating at the low speed. The rotating speed signal of the motor 8 is counted by a rotating speed counter 6, and when the difference between the counted value and the set value of a rotating speed setter 3 is zero, the motor 8 is stopped. |
