某三相异步电动机,额定转速为980转/分,采用变频调速,若负载转矩不变,将频率从基频调到30赫兹,电机的转速会变为( )。
发布时间:2025-12-14
A.588
B.788
C.1000
D.288
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id < 4497235 and id<>'4497235' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69445' and id > 4497235 and id<>'4497235' order by id asc limit 5
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