Lincoln Electric SVM168-B service manual Theory of Operation

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E-2		THEORY OF OPERATION						E-2
	FIGURE E.2 – BATTERY, STARTER, ENGINE, ROTOR, STATOR AND IDLER SOLENOID
				RANGE
				SWITCH
					AC	CHOKE	POLARITY	ELECTROD
			REACTOR	CV	OUTPUT			TERMINAL
					AC BRIDGE		SWITCH
				TAP
				STATOR				WORK
	MECHANICAL							TERMINAL
	ROTAT ION		ROTOR
STARTER	ENGINE			ROTOR
			SLIP
	FLYWHEEL		RINGS
	ALTERNATOR			STATOR
	IDLER
	SOLENOID

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BATTERY	FIELD
	CAPACITOR
	OUTPUT
	CONTROL
	PRINTED CIRCUIT
	BOARD

115 & 230VAC

RECEPTACLES

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BATTERY, STARTER, ENGINE, ROTOR, STATOR, AND IDLER SOLENOID

The 12VDC battery powers the starter motor. When the engine is started and running, the battery circuit voltage is fed, through the printed circuit board, to the rotating field coil in the rotor via a brush and slip ring configuration. This excitation (“flashing”) voltage mag- netizes the rotor lamination. The rotor is mechanically coupled to the engine. This rotating magnet induces a voltage in the stationary windings of the main alterna- tor (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 winding provides rotor current during machine operation. The output of the RANGER® 10,000 is dependent on two criteria: the engine RPM and the amount of current in the rotor winding.

The flywheel alternator, located on the engine, supplies “charging” current for the battery circuit. The battery circuit provides power for the printed circuit board and also for the idler solenoid. The idler solenoid is mechanically connected to the engine throttle linkage. If no current is being drawn from the RANGER® 10,000, the printed circuit board activates the idler solenoid, which then brings the engine to a low idle state. When output current is sensed, either weld or auxiliary, the printed circuit board deactivates the idler solenoid, and the engine returns to high RPM.

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

RANGER® 10,000 & RANGER® 10,000 PLUS