IC697ALG324

IC697ALG324

IC697ALG324

变频调速是近年来发展起来的一门新兴的交流电机调速技术，利用改变被控制对象的电源频率，可实现了交流电动机大范围无极平滑调速，并在运行过程中能随时根据用户的需求调整速度，使提升机始终处于最佳运行状态，在整个调速范围内均有很高的效率，节能效果很明显。采用变频器对异步电动机进行调速控制，由于使用方便、可靠性高并且经济效益非常明显，所以在工业控制方面得到了广泛应用。

二、改造方案

通过调研与论证，结合本公司矿井提升的现场实际情况，最终我公司技术中心做出决定，对提升机实施变频调速改造，利用在机械行业中广泛使用的自整角机来作为控制变频器的速度给定。自整角机是通过角位移变送器输出模拟量信号，操作工人搬动提升机操纵杆的角度，角位移变送器输出相应大小的模拟量信号，由此控制变频器运行频率，进而控制提升的运行速度。这种操作方式还可用变频器多段速控制，提升机只能在这几种速度下运行。而角位移变送器输出的是连续的角位移变送器输出模拟量信号，理论上提升机可在任意速度下运行，操作起来会方便一些，且与原操作习惯相似，操作工人容易掌握。

自整角机选择北京飞博尔电子有限公生产的FB900C系列角位变送器。其主要特点是：高精度，可在一圈内输出256-65536个绝对码；无温漂、时漂；可以测量高达3万圈；高可靠性：传感器的绝对位置和可靠的软件计圈技术，保证了其高度可靠性；且没有光电码盘的易损、易受干扰之缺点；自整角机使用方便：即插即用，无须调整传感器的零位，模块与传感器之间只需5根线，接线方便；功能强：该变送器即可以测量角度，也可以测量位置，具有角度与位置随意变换之功能。变送器具有的所有功能都由FB900C编程器设定。

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