IC697ALG445

IC697ALG445

IC697ALG445

以上为变频器设置的基本参数，其中电动机参数栏FA-01至FA-05必须按照电机铭牌上的标示进行输入，当输入完电机参数后，要把F0-01设置为0；F0-02设置为0；然后把FA-00设置为11，为电机静止自整定状态，然后对电机进行检测，变频器对电机检测完毕后将F0-01和F0-02的设置改为7和1，变频器就将控制转变为外部信号启动和控制。

工频系统的操作：

当变频系统出现故障时，可将该系统还原到原来的工频系统工作，切换到工频系统后要做的工作有以下几方面：断掉系统总电源后，将绕线式电机的转子接线还原，连接工频输出端。然后再将绞车控制台下方的凸轮控制器触点弹簧全部安装还原，这时工频系统就恢复到未改变频装置之前一样，提升机操作工可继续按照原来工频系统操作习惯进行控制。

四、节能计算

目前国内各类矿山等提升机大都采用交流绕线式异步电动机转子串电阻方式调速方案，使用交流接触器改变转子电阻来进行速度段的切换。对于绕线式电机，无论在起动､制动还是调速中，采用转子串电阻方式均会带来电能损耗。这种损耗随着转速的降低，转差率S的增大而增大。绕线式电机的功率关系为：

式中：

上式中：若S=0.5时，电磁功率就有一半的功耗消耗在转子的电阻上，调速系统效率非常低，只有50%左右。本例中，据测算提升机有30%的时间运行在低速段，节能率在24.5%左右，经济效益十分显著。

并且，原系统经常故障，主要是交流接触器触头频繁闭合和断开，容易造成触点及线圈的烧毁，经常维护电气部分的接触器、电机的碳刷与机械部分的刹车装置等。变频调速改造后，基本上无故障，大大地减少停工损失，产生的效益也不可小视。

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