Austro Engine E4 Series User Manual

E4 Series
Maintenance Manual
Electrical Power
Page 2
E4.08.04
Rev. 29
24- System Description
01-Jul-2020
2. Electrical System Installation
Make sure that all of the electrical system and wiring harness have protection against
chafing at hot parts or sharp edges.
The main aircraft battery supplies electrical power to the electrical system.
The engine is equipped with an alternator, which provides electrical power and charges the main
battery after starting the engine.
The excitation battery provides excitation power for the alternator start-up. Thereafter the alternator
is self-exciting.
The crankshaft drives the V-Ribbed belt. The V-Ribbed belt drives the alternator pulley.
A. Alternator
The alternator system consists of:
 An alternator
 An alternator-regulator
The alternator provides the main properties that follow:
 Air-cooled synchronous three-phase alternator with a claw-pole rotor
 Built-in semiconductor rectifier
 Stator winding circuit: delta connection
 External alternator regulator (installed on the airframe)
 Replaceable brushes
 Overvoltage protection with Zener Diodes
There are three external terminal points on the alternator:
 Power output (connected with battery) (B+ Terminal)
 Excitation current input (L)
 W terminal (not used)
 Ground (housing) (GND)
The alternator-regulator device monitors the output voltage of the alternator and adjusts the
excitation to maintain the output voltage of the alternator constant independent from the engine
speed and the actual load current.
To prevent damage of the alternator, deactivate the regulator when the engine is not
running.

Austro Engine E4 Series Specifications

General

Brand	Austro Engine
Model	E4 Series
Category	Engine
Language	English