Positive SSL
1 有一變壓器,無載時一次繞組感應電勢為200伏,鐵損為48瓦,功因為0.2,試求鐵損電流Ic與磁化電流Im各為若干安?
A 0.98A,0.24A
B 1.2A,1.176A
C 0.24A,1.176A
D 0.27A,0.98A

48=200×Io×0.2

Io=48/40=1.2A

Ic=Iocosθ=1.2×0.2=0.24A

Im=Iosinθ=1.2×1-0.22=1.176A