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THEORY OF OPERATION
FIGURE E.3 – ENGINE GENERATOR ARMATURE AND FRAME, ALTERNATOR STATOR AND ROTOR
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| SELECTOR |
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| RELAY |
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| SWITCH |
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| REED |
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| IDLER |
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| RELAY | NEGATIVE | |
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| BOARD |
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| CR2 |
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| OUTPUT | |
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| TERMINAL |
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| 115 & 230VAC |
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| RECEPTACLES |
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| IDLER |
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| SOLENOID |
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| OIL |
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| GENERATOR |
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| TEMPERATURE | PRESSURE |
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| FRAME |
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| GAUGE | SWITCH |
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| CURRENT |
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| FUEL |
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| SERIES |
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| INJECTION |
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| COILS |
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| TRANSFORMER |
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| PUMP |
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| BRUSHES & COMMUTATOR |
| ALTERNATOR | STATOR |
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SWITCH | ENGINE |
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| ARMATURE |
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| SLIP |
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| ENGINE | MECHANICAL | GENERATOR |
| ARMATURE | ROTOR |
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IGNITION |
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| COUPLING |
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| SHAFT |
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| ALTERNATOR |
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| RINGS |
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| INTERPOLE |
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| COILS | RESIDUAL |
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| STARTER |
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| MAGNETISM | FLASHING |
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| MOTOR |
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| FIELD |
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| SHUNT |
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| WINDINGS |
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| FIELD |
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| BATTERY |
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| RECTIFIER |
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| GENERATOR |
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| FIELD CONTROL |
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| OUTPUT |
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| TERMINAL |
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ENGINE, GENERATOR ARMATURE AND FRAME, ALTERNATOR STATOR AND ROTOR
EXCITATION (FLASHING)
When the engine is started and running, the residual magnetism voltage is applied to the alternator rotor via a brush and slip ring configuration. This excitation (“flashing”) voltage magnetizes the rotor lamination. The alternator rotor is connected to the armature shaft, which is mechanically coupled to the engine. This rotating magnet (rotor) induces a voltage in the station- ary windings of the alternator stator.
AUXILIARY AND FIELD FEEDBACK COILS
There are two isolated windings incorporated in the sta- tor lamination assembly. One of these windings is tapped and provides 115VAC and 230VAC of auxiliary power to the appropriate receptacles. The other 115VAC isolated winding is rectified to a DC voltage and is used to supply field feedback voltage to the rotor. It also, through the generator field rheostat control, sup- plies voltage to the field shunt windings in the main generator frame.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.