三相异步电动机的定子，只要满足有空间对称的三相绕组，然后通以电流即可产生圆形旋转磁场。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68478' and id < 4421466 and id<>'4421466' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68478' and id > 4421466 and id<>'4421466' order by id asc limit 5