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alternator
Definição1
A source of electrical power in aircraft that is akin to a generator except that it requires battery power to excite a magnetic field to enable the altenator to provide current.
Fonte1
KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
Português
alternador
Imagem

 Diagram of an alternator, showing the rotating magnet (the Rotor) and the stationary wire winding (the Stator) and the voltage produced as the rotating magnetic field induces a current in the wire.

Diagram of an alternator, showing the rotating magnet (the Rotor) and the stationary wire winding (the Stator) and the voltage produced as the rotating magnetic field induces a current in the wire.

Fonte: http://en.wikipedia.org/w/index.php?title=File:Alternator_1.svg&page=1

 Schema. Synchronous generator with two pairs of poles and inductor with parmanent magnets.

Schema. Synchronous generator with two pairs of poles and inductor with parmanent magnets.

Fonte: http://commons.wikimedia.org/wiki/File:Alternador.svg?uselang=es