【简答题】一台他励直流电动机的额定数据为 P N =10kW , U N =110V , I N =112A, n N =750rev/min , R a =0.1 Ω。设电动机带反抗性恒转矩负载在额定状态下运行。试计算 : ( 1 ) 采用电压反接制动,使制动电流为 2.2I N ,电枢电路应串多大电阻 ? ( 2 ) 电压反接制动 n=0 时,不切断电源,电机能否反转?如能反转,试求稳态转速。
【简答题】A. Fill in each blank with a word from the box after back down for in off on out over to up 1. I’ll tell you how to get to the little town of Stratford-upon-Avon in detail. You’d better take it_____. ...