1,额定励磁电压 Uf=If*Rf=0.6*200=120V
2,额定转速 Te = Laf*If*Ia Ia=10A
Ea = U - Ia*Ra=235V
Ea = Laf*If*wm wm = 195.83rad/s
n = 1870.07 r/min
3
1电机电枢电流
2 电磁转矩
3 转速
4
E = KeΦn E = 235V KeΦ = 0.12567 KtΦ = 1.2
n = U/KeΦ - T*(Ra+Rad)/(KeKtΦ2)
1 电枢电压减少一半
w = 95.8285 rad/s
n = 915.095 r/min
2 串联4欧姆电阻
n = 1551.683 r/min
w = 162.491 rad/s
3 励磁电压减少一半
Vf = 60V if = 0.3A
Te = Laf*ia*if ia = 20A
Ea = U - ia*Ra=230V
Ea = Laf*if*wm wm = 383.333 rad/s
n = 3660.5637 r/min
原文:http://www.cnblogs.com/HowardZe/p/6503155.html