自动门
自动门:大型四翼自动旋转门控制系统
发布时间:2014/8/20
自动门讯:
一种大型四翼自动旋转门控制系统
    电动机拖动单元组成:
    旋转门主驱动轮中轴:①三相交流电动机慢速涡流减速制动装置及计数铜盘;②辅助制
动摩擦轮;③主轴链轮;④工程尼龙V形传输带⑤双层链条;⑥位于主链轮底部的磁性接近
开关;⑦涡流电磁铁;⑧速度检测计速装置;⑨拖动电动机——力矩式交流电动机。
特别说明的是:在该电动机拖动单元中,电动机的调速是利用降压及涡流减速制动装
置共同进行的。在旋转门启动、平稳运行、降速保护、减速制动各个阶段中,根据速度
检测反馈通过PLC来设定不同的降压及涡流减速电流配置,从而达到速度的平稳无级
变化,使旋转门运转稳定。该装置在自动控制系统中可近似认为是一个小惯性环节,并采取前
馈作用方式,因此,整个调速系统的稳定性很容易控制,转速动态性能中如超调
量可得到改善,这种电动机拖动方式,为早期自动旋转门中常用。特别是在大型自动旋
转门中,为改善大型门扇旋转后的大惯性带来的减速、制动难、不准确等问题,利用涡
流减速制动可使其控制的“稳、快、准”得到一定改善并还有“柔性”。当然这种方式
所带来的后果之一便是能耗增加。
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