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| THEORY OF OPERATION |
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TOC | TOC |
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| FIGURE E.2 - ROTOR, STATOR AND CONTROL CIRCUITS |
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| RANGE |
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| SWITCH | 254 | TOROID* | |||||
Section | Master |
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| S2 | E |
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| ELECTRODE | ||
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| AC |
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to | to |
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| TERMINAL | ||
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| REACTOR |
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| OUTPUT + |
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| CHOKE | POLARITY | ||||||
Return | Return |
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| AC | BRIDGE |
| SWITCH |
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| WORK | |||
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| FUEL |
| W2 |
| C1 WAC | W1 |
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| TERMINAL |
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| STARTER |
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| SHUTOFF |
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| SOLENOID |
| SOLENOID |
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| WELD WINDINGS |
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| STARTER | MECHANICAL |
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| AUXILIARY |
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| WINDINGS |
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| ROTAT ION |
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| ENGINE |
| SLIP | ROTOR | STATOR | Z | Y |
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| FLYWHEEL ALTERNATOR/ |
| RINGS |
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| 5 |
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| VOLTAGE REGULATOR |
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TOC | TOC |
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| SOLENOID | 7 | EXCITER | 9 |
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| 6 |
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| WINDING |
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| X |
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Section | Master |
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| IDLER |
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| CONTROL | 3 |
| DIODE |
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| 3 6 X |
| TOROID* |
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| OIL |
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| 1 |
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| PRESSURE |
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| ENGINE |
| SWITCH |
| FLASHING |
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to | to |
| SWITCH* | 2 | HOUR |
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Return | Return |
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| FIELD |
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| Z X Y | |
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| CAPACITOR |
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| METER |
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| BATTERY | OUTPUT |
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| 120 & 230 VOLT |
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| 480 VOLT 3 PHASE | ||||
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| CONTROL |
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| BREAKERS AND |
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| BREAKER AND | ||
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| RECEPTACLES |
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| RECEPTACLE | ||
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| * Lead 254 - 1 turn through the toroid | |
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| PRINTED CIRCUIT | Leads 3 & 6 - two turns through the toroid in opposite directions. | |
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| BOARD | Lead X passes though the toroid in the same direction as lead 6 | |
TOC | TOC | ROTOR, STATOR & CONTROL CIRCUITS |
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| Approximately 10 seconds after the current stops, the | |||
Section | Master | Once the Engine is running and the oil pressure switch | |||
the Control PC Board. This “flashing” voltage energizes | down to the low idle speed. If the Control Power Switch | ||||
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| closes, 12 VDC is fed to the rotor slip rings by way of | board will | ||
to | to | the rotor and the resulting spinning magnetic field | is in the High Idle position, the signal from the Toroid is | ||
Return | Return | induces power into the windings of the stator. The | ignored. | ||
where it is rectified and regulated and fed back to the | The Weld Winding provides the power for welding. | ||||
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| exciter winding voltage is routed to the Control Board |
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| rotor slip rings. . This regulated supply is used to control | Different portions are used depending on the weld | ||
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| the voltage output of the welder. A diode on the PC | mode selected. The full winding is used for DC welding | ||
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| Board is used to isolate the exciter voltage from the | while a tapped off portion (WAC) is used for AC welding. | ||
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| engine 12 VDC supply. The Output Control is used to | There is also a tap (C1) used for constant voltage (CV) | ||
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| adjust the weld voltage. | welding. The Auxiliary Winding is a 3 phase ‘wye’ con- | ||
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| nected 480 VAC supply. Tapped off of one leg are the | |
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| The Idler Circuit is also controlled by the Control PC | 230 VAC single phase and the 120VAC single phase | ||
TOC | TOC | Board. A Toroid is used to sense current draw through | supplies for the various receptacles. Each of the recep- | ||
either the weld circuit or any of the auxiliary receptacles. | tacles including the 3 phase receptacle is protected by | ||||
Sectionto | Masterto | When current is sensed, a signal from the Toroid caus- | an appropriately sized Circuit Breaker. | ||
es the PC Board to release the Idler Solenoid and the |
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| engine goes to high speed. |
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Return | Return |
| NOTE: Unshaded areas of Block Logic |
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| Diagram are the subject of discussion |
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| RANGER® 3 PHASE | ||
