电机停车后再启动控制电路设计

Development on control circuit of motor starts again after stopping

电机短时间内再次自动启动引起电机主回路空气开关保护动作——速断,导致生产流程中断这一问题,采用实验方法进行研究,增加一个断电延时的时间继电器,利用它的延时闭合常闭点作为电动机的控制信号。通过这种方法对电机的控制电路进行改进,避免了空气开关在电机没有故障的情况下动作,确保了生产时间,实践证明该方法可行。

Automatic motor re-startup in a short time will result in the activation of air breaker in a main motor circuit.This will cause the interruption on production.In order to overcome this problem,a power off delay-time delay relay is installed in the circuit to take advantage of its delay-close contactor as motor＇s control signal.The experiment shows that the improved motor control circuit can prevent air breaker activation without faults.Therefore,the production time can be warranted.