控制模块MVI94-MCM

MVI94-MCM

当单相异步电动机的定子绕组进入单相异步电动机时，就会产生电磁场情况。其中单相异步电动机的定子绕组安装在电动机的定子铁芯上，电动机的转子为鼠笼式结构。

在单相异步电动机中，形式繁多，但就其共性而言，单相异步电动机的结构都由固定部分、转动部分、支撑部分等三大部分组成，固定部分指的就是定子，转动部分指的是转子，而支撑部分指的是端盖和轴承。机座结构随电动机冷却方式、防护型式、安装方式和用途而异。按其材料分类，有铸铁、铸铝和钢板结构等几种。

当单相交流电流引入单相异步电动机的定子绕组后，当电流在正半周和负半周不断交替时，电磁场的大小和方向也将不断变化，但电磁场的轴不会沿纵轴变化。此时的电磁场称为脉动电磁场。

当电机转子静止不动时，转子电导体产生的感应电流及其电流量均为0，产生的转矩也为0。此时，电机转子没有启动扭矩。因此，如果不采取的措施，单相异步电动机就不能启动。如果电机转子被外力旋转，电机转子可以继续朝这个方向旋转。

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