IC697ALG324
IC697ALG324
IC697ALG324
變頻調速是近年來發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用戶的需求調整速度，使提升機始終處于最佳運行狀態，在整個調速范圍內均有很高的效率，節能效果很明顯。采用變頻器對異步電動機進行調速控制，由于使用方便、可靠性高并且經濟效益非常明顯，所以在工業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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