1746-NO8I PLC模块

1746-NO8I

2.低运行频率：即电机运行的小转速，电机在低转速下运行时，其散热性能很差，电机长时间运行在低转速下，会导致电机烧毁。而且低速时，其电缆中的电流也会增大，也会导致电缆发热。

3.高运行频率：一般的变频器大频率到60Hz，有的甚至到400 Hz，高频率将使电机高速运转，这对普通电机来说，其轴承不能长时间的超额定转速运行，电机的转子是否能承受这样的离心力。

4.载波频率：载波频率设置的越高其高次谐波分量越大，这和电缆的长度，电机发热，电缆发热变频器发热等因素是密切相关的。

5.电机参数：变频器在参数中设定电机的功率、电流、电压、转速、大频率，这些参数可以从电机铭牌中直接得到。

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