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Aircraft dc generators have for the most part been replaced by alternators on modern aircraft.  However, there are still several dc generators currently in operation in older aircraft.


The Yoke: This is a cylinder of cast iron which supports the pole pieces of the electromagnetic field.

The Armature: This is driven by the aircraft engine and holds the windings in which the output voltage of the machine is induced.

The Commutator: The voltage induced in the armature is AC.  The commutator changes the AC voltage into DC voltage.

The Quill Drive: This is a weak point which is designed to shear and protect the engine, if the generator seizes.

The Brushes: These are made of carbon and collect the DC voltage from the moving armature and commutator.

The Suppressor: This reduces radio interference, which may be caused by sparking between the brushed and commutator.

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