IC697BEM711

IC697BEM711

IC697BEM711

本方案采用森兰SB70G系列变频器和西门子S7-200 PLC组成一套文化纸机传动控制系统。通过可编程逻辑控制器（PLC）和变频器之间的通信，控制传动点的启动、停止、增速、减速、紧纸等操作，由软件自动实现负荷分配、速度链等功能，充分满足造纸工艺及电控的需要。

1、纸机对电气传动控制系统的要求

1．1 该机结构简图如图4所示。纸机为1760/250m/min长网多缸文化纸机，生产40～65g/m2高级文化用纸，稳态精度≤0.01%。

图4  结构简图

1.2 为了能生产出质量标准较高的产品，纸机对电气传动系统提出如下的要求：

（1）  纸机工作速度要有较大的调节范围，调节范围为1:8；

（2）  车速要有较高的稳定裕度，总车速提升、下降要平稳。要求纸机稳速精度为±0.05～0.01%；

（3）  速差控制，速比可调、稳定。速差在一定范围内变化不引起纸页质量的突变，误差应控制在0.1%以内。纸机各分部的速度必须是可以调节的，为±10～15%。

（4）  各分部传动点具有速度微升、微降功能，同时在这些分部中，应具有单动、联动功能，并可以同时起动、停止。

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Siemens SBH 2012 SBH2012 SBH2012DV 1200 Amp SB12TP02G

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