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樓主  發(fā)表于: 2019-10-31 10:39
用PLC 控制正反轉電動(dòng)閥實(shí)現恒定值控制

請大家幫幫忙提提建議,用PLC 控制正反轉電動(dòng)閥實(shí)現恒定值控制。     壓力傳感器檢測管道要實(shí)時(shí)壓力,控制正反轉電動(dòng)閥  的開(kāi)閉  ,實(shí)現管道壓力一定的恒定。  電動(dòng)閥 不是比例閥 無(wú)法進(jìn)行開(kāi)度控制。
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1樓  發(fā)表于: 2019-11-02 15:33
測試過(guò)一次水流量控制,難度很大,最后還是用了帶反饋的調節閥。主要是斷電后不知道閥的開(kāi)度位置,必須回零,并且開(kāi)度與流量之間線(xiàn)性關(guān)系也不好,我能力不夠,所以控制效果不好。如果要求不高,不妨測試下,也有很多成功的案例。

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