In a modern three-phase A-Csynchronous brushless generator, the excitation winding is on the rotorThat means （）.<br>A:The generator needs not excitation<br>B:The winding on the rotor is for inputting excitation current<br>C:There are three phase windings on the rotor<br>D:The generator has brushes

In a modern three-phase A-Csynchronous brushless generator, the excitation winding is on the rotorThat means （）.
A:The generator needs 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 brushes

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