ABB产品fi820f

ABB产品fi820f

容量在1kw以上的直流电机，在相邻两主磁极之间要装上换向极。换向极又称附加极或间极，其作用为了改善直流电机的换向，至于如何改善换向的，将在后面介绍。

　　换向极的形状比主磁极简单，也是由铁心和绕组构成。铁心一般用整块钢或钢板加工而成。换向极绕组与电枢绕组串联。

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