ROTOR FIELD FEEDBACK,
AUXILIARY AND WIRE FEEDER
POWER
The AC voltage developed in the field winding is fed to
the full wave field bridge. The DC output of the field
bridge is filtered by the field capacitor and controlled
by the printed circuit board according to the setting of
the machine’s output control or remote control. This
filtered and controlled voltage is fed to the rotor wind-
ing via the brush and slip ring configuration. As the
feedback voltage is increased or decreased, the out-
puts of the weld and auxiliary windings are increased
or decreased.
When full field voltage is applied to the rotor and the
engine is running at high speed (3600 RPM), a 230VAC
voltage is developed in the stator auxiliary winding.
This winding is tapped to provide 115VAC. The two
voltages (115VAC and 230VAC), are connected to the
appropriate receptacles and offer 12,000 watts (total)
of AC power.
The auxiliary wire feeder winding offers 115VAC and is
tapped to also provide 42VAC. The current draw from
this winding should be limited to 8 amps. These volt-
ages and remote control signals are fed through the
by-pass (filter) board to the amphenol receptacles.
THEORY OF OPERATION
E-3 E-3
RANGER 300 D AND 300 DLX
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
FIGURE E.3
ROTOR FIELD FEEDBACK, AUXILIARY AND WIRE FEEDER POWER
