接触器斜率控制器的类PID整定

Similar-PID tuning of the contactor slope controller

针对工程上接触器的优化控制问题,分析了接触器斜率闭环控制原理,利用这一原理开发了接触器斜率控制器,以减少起动过程中的触头弹跳。仿照控制系统中常用的PID整定方法给出了斜率控制器的类PID整定规则:以接触器起动过程中的触头弹跳、起动电流的平稳性、保持过程的可靠性作为判断控制优劣的依据,对控制过程中的相关参数,包括起动电流限制值、斜率参考值及保持电流值进行工程整定。通过整定后,无需复杂的建模、仿真,即可将斜率控制方便的应用到各种不同的接触器中,进行起动过程的优化控制。以CJ20-160A交流接触器为被控对象对斜率控制器进行类PID整定,并进行实验验证,证实了所提方法的有效性。

Aiming at the optimization control of the contactor,the principle of slope closed-loop control of the contactor was analyzed.Using this principle,a slope controller of the contactor was developed to reduce the contact bounces of the starting process.According to the commonly used PID tuning method,the Similar-PID tuning method used for the slope controller was put forward：taking the contact bounces of the starting process,the smoothness of the starting current and the reliability of the holding process as the basis for judging the merits of the slope control,the relevant parameters of the slope controller were adjusted,including the limit value of the starting current,the reference value of the current slope and the holding current value.Therefore,without complex modeling and simulation,the slope control can easily be applied to kinds of different contactors to realize the optimal control of starting process.The CJ20-160A ac contactor was used to carry on the Similar-PID tuning experiment and the validity of the tuning method is proved.