同步电机中,空载电势或空载电压就是由主磁极产生的电动势,无论空载或负载,只要转速恒定,励磁电流不变,空载电势就不变。( )
发布时间:2025-12-14
A.正确
B.错误
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69444' and id < 4497214 and id<>'4497214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69444' and id > 4497214 and id<>'4497214' order by id asc limit 5
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