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THEORY OF OPERATION
FIGURE E.2 – ENGINE, ROTOR AND STATOR
|
| REACTOR |
|
| OUTPUT |
|
| TERMINALS |
|
| STATOR |
ENGINE | MECHANICAL |
|
| ROTATION |
|
| ROTOR | ROTOR |
| SLIP |
|
| RINGS |
|
|
| STATOR |
| CAPACITOR |
|
|
| 115 AND 230VAC |
|
| RECEPTACLES |
| RHEOSTAT | BRIDGE |
|
|
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ENGINE, EXCITATION, ROTOR AND STATOR
A small DC voltage developed by the flywheel alterna- tor in the Briggs & Stratton engine is fed to the rotat- ing field coil in the rotor via a brush and slip ring con- figuration. This excitation (“flashing”) voltage magnetizes the rotor lamination. The rotor is mechan- ically coupled to the engine. The rotating magnet induces a voltage in the stationary windings of the main alternator (stator).
Three separate and isolated windings are incorporated in the stator lamination assembly. Each winding set has a different number of turns, producing different magnitudes of AC output voltages. The three windings are the weld winding, the auxiliary power winding and the field feedback winding. The field feedback wind- ing provides rotor current during machine operation. The output of the PowerArc 4000 is dependent on two criteria: the engine RPM and the amount of current in the rotor winding.
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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
