自动门
自动门:自动旋转门电气控制系统
发布时间:2014/8/22
自动门讯:
自动旋转门电气控制系统
基于变频调速在交流电动机拖动调速控制系统中已应用的越来越广
泛,在自动旋转门控制系统中也不例外。
该系统主要由旋转门、接近传感器、可编程控制器和变频器组成。下面分别简述如下:
 (1)旋转门及接近传感器。
    该旋转门由四扇玻璃门相互垂直地镶嵌在同一个轴柱上构成,电机通过减速机构带动
旋转门的轴柱,从而产生旋转门的旋转运动。
    为了实现系统的全部自动化和智能化,本系统在旋转门圆形框架的上端,安装了四个
接近传感器,三个面向进门的行人,一个面向出门的行人;在门框外侧的边沿上,分别安
装了两套防夹传感器;在圆弧门框外侧的表面上,分别安装了暂停按键和残疾人专用换速
按键;旋转门的定位或加减速起点行程开关。
(2)可编程控制器(PLC)。
    该系统利用日本OMRON公司的C28P型可编程控制器(PLC),作为该系统的控制指挥中心。
该可编程控制器把来自旋转门现场的检测信号、变频器的状态信号以及楼宇自动监控系统
的指令,经过收集、处理后,完成对变频器的频率控制和对楼宇自动监控系统的信息反馈。
当0000=ON时,启动该旋转门控制系统。当OO01=ON时,旋转门的转速不受客流量多少的控
制,以固定不变的转速旋转。
(3)变频器。
    由于旋转门处于公共场所,行人或物品阻碍旋转门正常旋转的现象时常发生,因此导
致电动机的负载变化大、过电流现象发生频繁,所以选用FVR015E7S—7EX型变频器。
此种变频器具有快速响应的电流限制功能,当负载波动相当大时,变频器不跳闸,能自动
减速运行;当负载恢复芷常时,变频器能自动升速到设定值。使用该变频器,电动机低速
驱动能力强,启动转矩能达到额定值的iso%。该变频器还具有电压AVR自整定等一系
列先进功能。所有动作都由PLC控制。
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