MPL-B1530F-V-X220

MPL-B1530F-V-X220

交流伺服电动机广泛用于自动控制系统中，比较常用的的交流伺服电动机是小型或微型的两相异步鼠笼式转子电机，在电机的定子上装有两个空间上相差90度电角度的绕组，一个绕组为励磁绕组，该绕组一般接在电压恒定的电网上；另一个绕组为控制绕组，该绕组接控制电压，控制电压与励磁电压为同频率。

伺服电动机的定子绕组与单相电机的工作绕组与起动绕组有些相似，主要的区别在于伺服电机的控制电压是一个变化值。当控制电压为零时，电机气隙中只有一个脉振磁场，没有起动转矩，因而电机的转子处于静止状态；当控制电压大于零时，则在电机气隙中产生一个椭圆形的旋转磁场，因而电机就因为起动转矩的作用而进行旋转。

电机中电磁转矩决定于控制电压的大小和相位，因而通过控制电压大小和相位的调整，即可按照不同的需求实现电机的起动、制动、旋转及变速，控制电压的大小和相位是影响电机电磁转矩的主要变量，可以通过单纯的调整一个变量和两个变量或同时调整的方式，实现电机的控制。

PARKER REGULATOR BACK PRESSURE, BR-3-1168-2

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