| 摘要 |
PURPOSE:To enable to independently set the accelerating time, decelerating time and a normal speed by providing acceleration/deceleration setters, an integrator with a limiter for integrating the outputs of the setters, a normal speed setter to form a speed regulating controller. CONSTITUTION:A power source 2 is connected through a bidirectional SCRs 31- 33 to an induction motor 1, the output of a governoring controller 4 is inputted to a trigger circuit 5 to control the SCRs 31-33, thereby controlling the rotating speed of the motor 1. A speed regulating controller 4 is formed of a normal speed setter VR1, an acceleration setter VR2, a deceleration setter VR3 and an integrator OP2 with a limiter. A relay 45 is operated by the operation of a switch S2 at the accelerating time, the voltage of the VR2 is applied to an OP2 to lower the output at the constant gradient to the constant value, outputted through an operational amplifier OP4, and operated similarly at the decelerating time. Accordingly, the controllability can be improved individually at the accelerating, decelerating, normal speed time. |
