Lincoln Electric SVM197-A service manual Rotor Field Feedback Auxiliary Power, Return

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E-3	THEORY OF OPERATION	E-3
	FIGURE E.3 – ROTOR FIELD FEEDBACK AND AUXILIARY POWER

		REACTOR
			OUTPUT
			TERMINALS
		STATOR
ENGINE	MECHANICAL
	ROTATION
	ROTOR	ROTOR
	SLIP
MAGNETO	RINGS
CIRCUIT		STATOR
	CAPACITOR
LOW OIL
SWITCH		CIRCUIT	CIRCUIT
		BREAKER	BREAKER
RUN/STOP
	SWITCH
	RHEOSTAT	BRIDGE
		230VAC	115VAC
		RECEPTACLES	RECEPTACLES

ROTOR FIELD FEEDBACK AND

AUXILIARY POWER

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The AC voltage developed in the field winding is fed to the full wave bridge. The DC output of the bridge is fil- tered by the field capacitor and controlled by the out- put rheostat.

This filtered and controlled feedback voltage is fed to the rotor winding via the brush and slip ring configura- tion. As the feedback voltage is increased or de- creased, the outputs of the weld and auxiliary wind- ings are likewise increased or decreased.

When full field voltage is applied to the rotor and the engine is running at high speed (3700 RPM), a 230 VAC voltage is developed in the stator auxiliary wind- ing. This winding is tapped to provide 115 VAC. The two voltages (115 VAC and 230 VAC) are connected to the appropriate receptacles and offer 5500 watts (total) of AC power.

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NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion

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