IC697ALG324
IC697ALG324
IC697ALG324
變頻調速是近年來發(fā)展起來的一門新興的交流電機調速技術，利用改變被控制對象的電源頻率，可實現(xiàn)了交流電動機大范圍無極平滑調速，并在運行過程中能隨時根據(jù)用戶的需求調整速度，使提升機始終處于最佳運行狀態(tài)，在整個調速范圍內均有很高的效率，節(jié)能效果很明顯。采用變頻器對異步電動機進行調速控制，由于使用方便、可靠性高并且經(jīng)濟效益非常明顯，所以在工業(yè)控制方面得到了廣泛應用。
二、改造方案
通過調研與論證，結合本公司礦井提升的現(xiàn)場實際情況，最終我公司技術中心做出決定，對提升機實施變頻調速改造，利用在機械行業(yè)中廣泛使用的自整角機來作為控制變頻器的速度給定。自整角機是通過角位移變送器輸出模擬量信號，操作工人搬動提升機操縱桿的角度，角位移變送器輸出相應大小的模擬量信號，由此控制變頻器運行頻率，進而控制提升的運行速度。這種操作方式還可用變頻器多段速控制，提升機只能在這幾種速度下運行。而角位移變送器輸出的是連續(xù)的角位移變送器輸出模擬量信號，理論上提升機可在任意速度下運行，操作起來會方便一些，且與原操作習慣相似，操作工人容易掌握。
自整角機選擇北京飛博爾電子有限公生產(chǎn)的FB900C系列角位變送器。其主要特點是：高精度，可在一圈內輸出256-65536個絕對碼；無溫漂、時漂；可以測量高達3萬圈；高可靠性：傳感器的絕對位置和可靠的軟件計圈技術，保證了其高度可靠性；且沒有光電碼盤的易損、易受干擾之缺點；自整角機使用方便：即插即用，無須調整傳感器的零位，模塊與傳感器之間只需5根線，接線方便；功能強：該變送器即可以測量角度，也可以測量位置，具有角度與位置隨意變換之功能。變送器具有的所有功能都由FB900C編程器設定。
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