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THEORY OF OPERATION
FIGURE E.3 – WELD WINDINGS, RECTIFIER, POWER MODULES AND FEEDBACK
| TO | WORK |
| CONTROL | |
| BOARD | TERMINAL |
SHUNT | __ | |
RECTIFIER |
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| TO |
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| CONTROL |
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| BOARD |
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| POWER MODULES |
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| (TWO) |
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| IGBT | ELECTRODE |
| TERMINAL | |
| CHOKE | + |
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| IGBT |
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| W |
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| D | I |
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| N |
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| L |
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| D |
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| E |
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| I | N |
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| W |
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| G |
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| CONTROL |
| ENGINE | ROTATION | ROTOR | BOARD | |||
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| MECHANICAL |
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STARTER |
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| SLIP |
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| RINGS |
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| ARC OUTPUT MODE |
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| STATOR |
| CONTROL CONTROL SELECTOR | |
ALTERNATOR | ENGINE |
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| SENSORS |
| AUXILIARY | WINDINGS |
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| SOL |
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| 1 |
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| I |
| 1 |
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BATTERY | SOL | D |
| 5 |
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| V |
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| L |
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| S |
| A |
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| E |
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| H |
| C |
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| R |
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| U |
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| 230VAC |
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| T |
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| RECEPTACLE |
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| D |
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| O |
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| W |
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| 115VAC |
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| N |
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| RECEPTACLE | 42VAC |
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| ENGINE |
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| PROTECTION |
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| 30VAC |
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| CONTROL |
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| TRANSFORMER | 30VAC |
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WELD WINDINGS, RECTIFIER, POWER MODULES AND FEED- BACK
The
output is applied through choke coils to the welding out- put terminals. The chokes function as current filters and also help to balance the outputs of the two power modules.
Output voltage and current feedback information is fed to the control board. This information is sensed at the output terminals and the shunt.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
