皇冠即时比分

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SKB变频调速控制柜工作原理及变频调速原理

水泵百科 卧泉泵业 691浏览 0评论

设备启动以后,电机(第一台)通过开关和变频器输出端U、V、W得到逐渐上升的频率和电压(其上升速度可根据拖动对象和系统的特性预置)而开始旋转并转速逐渐升高(电机的这种启动方式叫软启动),当电机的转速升高到某值即电机转速响应到系统中预先设定的参数(如水泵皇冠即时比分系统中的设定压力)时稳定其转速而旋转,从而达到系统的平衡。

 

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变频调速原理

交流感应电动机的转速公式
N=60f1×(1-s)/p
式中-N:电机转速   F1:定子供电频率    S:转差率  P:电机极对数
由公式可见,如均匀地改变电机定子供电频率F1,则可平滑地改变电机的同步转速。在许多场合,为保持在调速时电机的最大转矩不变,需维持电机的磁通恒定,因此要求定子供电压也也应作相应的调节。VVVF变频器即兼有调频、调压两种功能。

转载请注明:卧泉泵业博客 » SKB变频调速控制柜工作原理及变频调速原理

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