Alternator:
The alternator system consists of an alternator and an alternator-regulator device.
The alternator provides the following main properties:
Air-cooled synchronous three-phase alternator with a claw-pole rotor
Built-in semiconductor rectifier
Stator winding circuit: delta connection
External alternator regulator (mounted on the aircraft)
Belt-driven by the engine
There are three external terminal points on the alternator:
Power output (connected with battery)
Excitation current input
Ground (housing)
The output voltage of the alternator has to be constant, independent from engine speed and actual
load current. This requires a regulation of the output voltage by a variation of the excitation current
(implemented in the alternator-regulator device).
To avoid damage of the alternator the regulator must be deactivated when the engine
is not running.
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