The rotor, made of soft steel without an exciting winding, may have two, four or six poles.

用软钢制作而成的转子没有励磁电枢，但有两个，四个或者六个电极。

youdao

The rotor, made of soft steel without an exciting winding, may have two, four or six poles.

用软钢制作而成的转子没有励磁电枢，但有两个，四个或者六个电极。

youdao