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THEORY OF OPERATION
FIGURE E.2 – BATTERY, STARTER, ENGINE, GLOW PLUGS, ENGINE PROTECTION,
ROTOR, STATOR AND IDLER SOLENOID
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| SWITCH |
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| AC | OUTPUT | RANGE |
| POLARITY SWITCH |
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| PART OF | CHOKE |
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| RECTIFIER | SWITCH |
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| AC | BRIDGE | CAPACITORS |
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SHUTDOWN |
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SOLENOID |
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| STATOR |
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GLOW PLUGS |
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ENGINE | MECHANICAL | ROTOR |
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ROTOR |
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STARTER | SLIP |
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MOTOR |
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REGULATOR |
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ALTERNATOR | IDLER |
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| SOLENOID |
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| FIELD | 115 & 230VAC |
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BATTERY |
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ENGINE |
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PROTECTION |
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RELAY |
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| FIELD |
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| CAPACITOR |
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BOARD |
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OUTPUT |
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CONTROL |
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REMOTE |
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SWITCH |
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42VAC |
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115VAC |
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6 PIN | 14 PIN | |
AMPHENOL | ||
AMPHENOL | ||
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WORK
TERMINAL
ELECTRODE TERMINAL
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BATTERY, STARTER, ENGINE, GLOW PLUGS, ENGINE PROTECTION, ROTOR, STATOR AND IDLER SOLENOID
The 12VDC battery powers the starter motor and glow plugs. The glow plugs are used to preheat the diesel engine to enhance starting., 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 magnetizes the rotor lamination. The rotor is mechanically coupled to the engine. This rotating magnet induces a voltage in the stationary windings of the main alternator (stator)., There are four separate and isolated windings incorpo- rated in the stator lamination assembly. Each set has a different number of turns producing different magni- tudes of AC output voltages. These four windings are the weld winding, the auxiliary power winding, the field feedback winding and the auxiliary power winding for
wire feeders. The field feedback winding provides rotor current during machine operation. The output of the Ranger
The engine alternator and regulator supply “charging” current for the battery circuit., The battery circuit pro- vides power for the printed circuit board and also for the idler solenoid. The idler solenoid is mechanically connected to the engine’s throttle linkage. If no weld- ing or auxiliary current is being drawn from the Ranger
The engine protection circuit shuts the engine off in the event of low oil pressure or over temperature of engine coolant.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
RANGER
