1C31224G01

 1C31224G01
1C31224G01
1C31224G01

、概述：

　　自动扶梯是商场﹑车站﹑机场普遍使用的一种载人提升设备。某商场有两台自动上下扶梯，使用11kW（四极）交流电机传动，经减速箱减速后拖动自动扶梯运转。两台扶梯一台作为上行，另一台作为下行，运行一段时间后就人为地进行交换，即上行的交换为下行，下行的交换为上行运转。在运行过程中，顾客的流量在不同时段有较大的差别，有时乘自动扶梯可能一个人也没有，由于顾客到来具有随机性，也不可能在无人乘坐时将自动扶梯停止运转，未进行调速控制的自动扶梯只能以额定速度空转，这样运行很不经济，浪费大量的电能，而且，链条、皮带磨损大、维修周期短，给正常使用带来了不少麻烦。因此对自动扶梯进行变频调速改造，在无人乘坐时降低速度运转，有人乘坐时再平稳地加速到额定速度运转。这样，可减低链条、皮带的磨损；转速降低后，电机的输出功率大幅度减少，带来了一定的节能效果。无人乘坐的时间越长，节能的效果越显著。

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