In an alternator, which component rotates and provides AC voltage to rectifier diodes?

In an alternator, which component rotates and provides AC voltage to rectifier diodes?

• A. Exciter Armature
• B. Main Rotor
• C. Stator Windings
• D. Field Coils

Answer: (A)

In a brushless excited alternator, the rotating piece that feeds the rectifier diodes is the exciter armature. This small generator on the rotating exciter produces AC voltage as it spins, and that AC is routed to a rectifier bridge. The rectifiers convert that AC to DC, which then energizes the main rotor’s field windings to create the magnetic field that induces voltage in the stator windings. The main rotor provides the rotating magnetic field, and the stator windings produce the output, while the field coils are what receive the DC from the rectifier to maintain that field. So the exciter armature is the part that rotates and supplies AC to the diodes.

In a brushless excited alternator, the rotating piece that feeds the rectifier diodes is the exciter armature. This small generator on the rotating exciter produces AC voltage as it spins, and that AC is routed to a rectifier bridge. The rectifiers convert that AC to DC, which then energizes the main rotor’s field windings to create the magnetic field that induces voltage in the stator windings. The main rotor provides the rotating magnetic field, and the stator windings produce the output, while the field coils are what receive the DC from the rectifier to maintain that field.

So the exciter armature is the part that rotates and supplies AC to the diodes.