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THEORY OF OPERATION
FIGURE E.2 – BATTERY, STARTER, ENGINE, ROTOR, STATOR AND IDLER SOLENOID
RANGE
SWITCH
| AC |
|
| ELECTRODE |
| OUTPUT | CHOKE | POLARITY | TERMINAL |
|
| |||
REACTOR | AC BRIDGE |
| SWITCH |
|
|
|
|
|
| WORK |
STATOR | TERMINAL |
MECHANICAL
ROTATION
ROTOR
STARTER ENGINESLIPROTOR
RINGS
Section
Master
FLYWHEEL
ALTERNATOR
IDLER
STATOR
SOLENOID
PRINTED
CIRCUT
BOARD
BATTERY
FIELD
CAPACITOR
115 & 230VAC
RECEPTACLES
OUTPUT
CONTROL
FIELD
BRIDGE
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BATTERY, STARTER, ENGINE, ROTOR, STATOR, AND IDLER SOLENOID
The 12VDC battery powers the starter motor. When the engine is started and running, the battery circuit voltage is fed, through the printed circuit board, to the rotating field coil in the rotor via a brush and slip ring configuration. This excitation (“flashing”) voltage mag- netizes the rotor lamination. The rotor is mechanically coupled to the engine. This rotating magnet induces a voltage in the stationary windings of the main alterna- tor (stator). Three separate and isolated windings are incorporated in the stator lamination assembly. Each winding set has a different number of turns producing different magnitudes of AC output voltages. The three windings are the weld winding, the auxiliary power
winding and the field feedback winding. The field feedback winding provides rotor current during machine operation. The output of the RANGER 8 is dependent on two criteria: the engine RPM and the amount of current in the rotor winding.
The flywheel alternator, located on the engine, supplies “charging” current for the battery circuit. The battery circuit provides power for the printed circuit board and also for the idler solenoid. The idler solenoid is mechanically connected to the engine throttle linkage. If no current is being drawn from the RANGER 8, the printed circuit board activates the idler solenoid, which then brings the engine to a low idle state. When out- put current is sensed, either weld or auxiliary, the print- ed circuit board deactivates the idler solenoid, and the engine returns to high RPM.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
