Thursday, May 30, 2013
Aircraft DC generator construction
By Janitha Gunawardana Dated 10:52 AM
Aircraft dc generators have for the most part been replaced by alternators on modern aircraft.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.