题目
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.
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.
题目解答
答案
B. The winding on the rotor is for inputting excitation current.
解析
在现代三相交流同步发电机中，励磁绕组位于转子上。这意味着转子上的绕组用于输入励磁电流。励磁电流是用于产生磁场的电流，该磁场与定子绕组相互作用以产生交流电。因此，选项B是正确的。