PID闭环调节在双变频离心机电气控制上的应用

Application of PID Closed Loop Adjusting in Electric Control of Double Frequency Conversion Centrifuge

在双电机变频驱动卧螺离心机中,污泥的干度是关注的重点,以双电机变频驱动卧螺离心机为例,介绍如何利用PID控制技术对离心机的速度和力矩进行控制和调节,能较好地解决了污水浓度变化引起的泥饼干度不稳定,使控制精度大幅提高。系统具备恒差速和恒扭矩两种工作模式,较好地控制泥饼的干度和清液的回收率得到很好的提高,并使系统的稳定性能得到很大的改善。

The most - value aspect paid attention to is the solid content of cake in double frequency conversion centrifuge decanter with double motors. This paper makes this centrifuge for example, introduces how to control and adjust the speed and torsion of centrifuge by PID control technique. This technique raises the control precision, so it solves the problem of non - steady solid content of cake result from the thickness change of sludge. Meanwhile, there are two modules including constant different speed and constant torsion in this control system, so it can pretty good control solid content of cake and recycling rate of centrate is advanced, and moreover, improved the steady of whole system.