原理
PICS系統(tǒng)主要通過專用變頻器、PLC及壓力檢測模塊對真空泵設備進行閉環(huán)控制，從而實現(xiàn)真空系統(tǒng)的真空度恒定。本系統(tǒng)采用解耦控制方式，這種控制方式運用先進的算法，解除各串聯(lián)真空泵的關(guān)聯(lián)影響,得到穩(wěn)定、持久的良好控制效果。
通過真空壓力檢測模塊，測量真空泵出口壓力，變成標準信號，傳送到PLC的模擬輸入模塊內(nèi)。模擬輸入模塊把電壓信號轉(zhuǎn)換為數(shù)字量，輸入到CPU模塊中。CPU把用戶設定的真空度和測量到的真空度進行比較，再經(jīng)過解耦計算，最后通過模擬輸出模塊輸出標準信號，分別送到對應的變頻器以合適的速度運轉(zhuǎn)，使真空度達到設定要求。在此系統(tǒng)中輔以青島海納華自動化設備研發(fā)的水處理單元，以減少真空泵中的水量，使系統(tǒng)負載大幅降低。根據(jù)功率計算公式可計算出節(jié)能改造前后的電機耗電功率，單位時間內(nèi)的耗電功率就是耗電量；同時也可以觀察節(jié)能改造前后的電壓、電流和功率因數(shù)進行對比，即可以計算出節(jié)電量。
系統(tǒng)配置
● PLC(西門子)
●觸摸屏（西門子）
●真空檢測模塊
●變頻器(上海雷諾爾專用)
●正版控制系統(tǒng)軟件
●電源(西門子)
●水處理單元
3、PICS系統(tǒng)產(chǎn)品特點
1、節(jié)電效益顯著，節(jié)電率高達20%-40%
2、斜坡啟動功能，消除傳統(tǒng)啟動時的沖擊電流
3、真空壓力穩(wěn)定，有效提高產(chǎn)品的質(zhì)量與數(shù)量
4、減少電機發(fā)熱及運動部件的磨損程度，有效延長電機使用壽命，降低維修成本
5、微電腦智能控制，自動適應、自動跟蹤，無需人工調(diào)整
6、工頻及變頻狀態(tài)自動轉(zhuǎn)換，故障自動報警并切換到工頻運行，不影響正常工作
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