用PLC和变频器实现造纸机同步传动控制

本文以造纸机上最新采用的PLC和变频器组合的控制方案在造纸过程中实现多电机同步传动为研究对象，提出了适于PLC控制的，能在纸机传动过程中实现高精度稳速控制及恒张力控制的过程控制模型及控制策略。该模型建立了过程运行参数与控制目标的准确定量关系，既没有理论误差，又避免了多电机的性能差异及负载波动等对控制的影响，为实现造纸机多电机高精度同步传动提供了技术手段。

The Realization of Synchronous Transmission Controlling of Paper Machine by Means of PLC and Frequency Transformer

This paper focuses on the realizatio n of multi-motor synchronous transm ission based on the combination of PLC and fre-quency transformer adopted in paper making machine and puts forward a pro cess control model and control strategies which are applied to PLC control and ensure its speed stab ilizing with high accuracy in the pap er transmission.The model establis hes an accurate quantitative relation between the process operation parameter and the control objective with no theoretical errors and av oidance of the multi-motor performance differences and the inf luence of load fluctuation on the con trol.This model provides technical devices for the synchronous transmission with high accuracy of m ulti-motor paper-making machine.