XYCOM PM4153/B
XYCOM PM4153/B控制矢量控制是基于理论上认为:异步电动机与直流电动机具有相同的转矩产生机理。 矢量控制方式就是将定子电流分解成规定的磁场电流和转矩电流,分别进行控制,同时将两者合成后的定子电流输出给电动机。 因此,从原理上可得到与直流电动机相同的控制性能。 采用转矩矢量控制功能,电动机在各种运行条件下都能输出大转矩,尤其是电动机在低速运行区域。
现在的变频器几乎都采用无反馈矢量控制,由于变频器能根据负载电流大小和相位进行转差补偿,使电动机具有很硬的力学特性,对于多数场合已能满足要求,不需在变频器的外部设置速度反馈电路。 这一功能的设定,可根据实际情况在有效和无效中选择一项即可。
与之有关的功能是转差补偿控制,其作用是为补偿由负载波动而引起的速度偏差,可加上对应于负载电流的转差频率。 这一功能主要用于定位控制。
XYCOM PM4153/B
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