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Jabiru Aircraft
Pty Ltd
Instruction & Maintenance Manual
Jabiru 2200 Aircraft Engine
Hydraulic Valve Lifter Models
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REVISION
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Dated : June 2010
Issued By: DPS
Page: 58 of 116
L:\files\Manuals_For_Products\Engine_Manuals\Transition\JEM2204-9_I&M_unsigned.docx
7.5.1.7
Permanent Magnet Alternator (PMA) Operation
Figure 29
– Alternator Circuit Diagram
(1) Master Switch
(3) Main Bus Bar
(5) Battery
(7) Regulator
(2)Voltage Reference Line (4) Fusible Link
(6) Permanent Magent Alternator
(8) Charge Lamp
The charging system supplies electrical devices and also charges the battery while the
engine runs. It consists of a Permanent Magnet Alternator (PMA) and a Regulator.
This permanent magnet alternator (PMA) is a 10 pole rotating magnet type generator.
It is a simple construction consisting of a stator and rotor. The rotor is made up of ten
permanent magnets, alternator body and magnet retainer mounted on the flywheel.
The stator has ten poles with coils and is mounted on the rear plate. The stator goes
inside the rotor.
Coils are installed with heat insulating washers. The coils are positioned such that the
coil on the side of the engine with cylinders #1 & #3
has it’s output lead pointing down
to the distributor. Output lead from coil on cylinder #2 & #4 side of the engine points
up, then is curled down to the distributor cap
– Generally, the output leads follow
direction of prop rotation. Coils are
set at a gap of between .010” - .012”