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1 有一直流分激電動機為4極,端電壓為230伏特,電樞電阻為0.4歐姆,每極磁通為0.018韋伯,電樞導體數為600根,電樞繞組採單式疊繞,其滿載時電樞電流為80安培,試求滿載時轉速為多少rpm?
A 900 rpm
B 1000 rpm
C 1100 rpm
D 1200 rpm

E = V-IARA

=230-80×0.4 = 198V

a=mP=4

E = PZ60aΦn

198 = 4×60060×4×0.018×n

n=1100 rpm