IC697BEM711
IC697BEM711
IC697BEM711
本方案采用森蘭SB70G系列變頻器和西門子S7-200 PLC組成一套文化紙機傳動控制系統。通過可編程邏輯控制器（PLC）和變頻器之間的通信，控制傳動點的啟動、停止、增速、減速、緊紙等操作，由軟件自動實現負荷分配、速度鏈等功能，充分滿足造紙工藝及電控的需要。
1、紙機對電氣傳動控制系統的要求
1．1 該機結構簡圖如圖4所示。紙機為1760/250m/min長網多缸文化紙機，生產40～65g/m2高級文化用紙，穩態精度≤0.01%。
圖4 結構簡圖
1.2 為了能生產出質量標準較高的產品，紙機對電氣傳動系統提出如下的要求：
（1） 紙機工作速度要有較大的調節范圍，調節范圍為1:8；
（2） 車速要有較高的穩定裕度，總車速提升、下降要平穩。要求紙機穩速精度為±0.05～0.01%；
（3） 速差控制，速比可調、穩定。速差在一定范圍內變化不引起紙頁質量的突變，誤差應控制在0.1%以內。紙機各分部的速度必須是可以調節的，為±10～15%。
（4） 各分部傳動點具有速度微升、微降功能，同時在這些分部中，應具有單動、聯動功能，并可以同時起動、停止。
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