1.In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .A.The generator need not excitation.B.The winding on the rotor is for inputting excitation current.C.There are three phase windings on the rotor.D.The generator has no brushes.
2.英译汉:gearbox ratio
3.英译汉:production
4.英译汉:rotor
第1题:
Dram
Salient pole
Squirrel-cage
Wound-rotor