【简答题】直流电动机起动时电枢回路串入电阻是为了( )。 A .增加起动转矩 B .限制起动电流 C .增加主磁通 D .减小起动时间
【单选题】直流电动机起动时电枢回路串入电阻是为了( )。
【单选题】What would the man love to do?
A.
He loves to look after his cat.
B.
He loves to take care of her cat.
C.
He wouldn't like to do it.
【简答题】为什么他励直流电动机一般不能全压起动?应采用什么起动方法?
【简答题】直流电动机采用降低电源电压的方法起动,其目的是() A为了使起动过程平稳 B为了减小起动电流 C为了减小起动转矩
【简答题】He loves science fiction in particularly . __________
【简答题】一般的他励直流电动机为什么不能全压起动?应采用什么起动方法?
【单选题】He loves films and novels in the horror ___________ .