【简答题】一台并励直流电动机的额定数据为: P N =17kW , U N =220V , I N =92A , R a =0.08Ω , R f =110Ω , n N =1500r/min ,试求:(20分) ( 1 )额定负载时的效率; ( 2 )额定运行时的电枢电动势 E a ; ( 3 )额定负载时的电磁转矩。
【简答题】完形填空。 The picture show eigh-year-old Katy Ross in Nepal, small country in north India. Katy 1 school 8 months ago and soon she will go to university. She loves traveling and decided to visit Asia ...