罗克韦尔产品22B-D4P0C104

22B-D4P0C104

22B-D4P0C104电机对驱动系统的整体EMC有很大的影响。其电感和电阻会影响低频谐波，但更重要的是寄生电容，这些电容在每次开关时都会导致不需要的电流峰值： · 绕组间电容 （Ciw）。这往往是在nF的顺序。这导致相位上出现大电流峰值，这些相位以电感方式耦合到其他电路。 · 绕组至机箱电容 （Cwc）。此外，在nF或pF的顺序中，这会导致机箱的电流峰值，辐射和共模问题。 · 定子-转子电容会导致轴承电流和高压驱动器（不包括在图纸中）的过早失效。 · 电机底盘对地电容很大程度上取决于电机的安装位置（如果电机接地良好，驱动器接地后，此电容可以忽略不计）。 可以推断，即使平均电流为零，每次相位改变其电压时都会发生大电流峰值（以安培为单位）。这些峰值在寄生电路（如电缆电感和寄生电容）之间振荡和共振，并导致许多EMC问题。事实上，它们可以通过电机电缆或电机底盘本身进行辐射。 电机设计和布线对EMI影响很大 根据电机和布线的不同，相同的伺服驱动器可以地工作，没有EMC问题，或者有很大的干扰问题并且不符合EMC标准。理想的电机应具有低寄生电容，并且应具有与其底盘的良好接地连接。 下面解释了为什么每个安装手册上重复的建议都非常有用。

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