Theory of Operation

TOC

E-2

FIGURE E.2 – BATTERY, STARTER, ENGINE, ROTOR, STATOR AND IDLER SOLENOID

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		RANGE
		SWITCH
			AC	CHOKE	POLARITY SWITCH
			OUTPUT	PART OF	POLARITY SWITCH
			RECTIFIER	RANGE
			BRIDGE	SWITCH
		REACTOR	AC	CAPACITORS
		REACTOR

		STATOR
MECHANICAL
ROTATION
ENGINE	ROTOR
STARTER	SLIP	ROTOR
STARTER	RINGS	ROTOR
	RINGS
FLYWHEEL
ALTERNATOR
IDLER
SOLENOID
	PRINTER
	CIRCUT
	BOARD
BATTERY	FIELD
	FIELD
	CAPACITOR
		115 & 230VAC
		RECEPTACLES
		FIELD
		BRIDGE
BY-PASS
BOARD
CONTACTOR CLOSURE
				CONTACTOR CLOSURE
OUTPUT
CONTROL
REMOTE
SWITCH
115VAC
42VAC

6 PIN	14 PIN
AMPHENOL	AMPHENOL

WORK

TERMINAL

OUTPUT

CONTACTOR

ELECTRODE

TERMINAL

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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). Four 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 four windings are the weld winding, the auxiliary power

winding, the field feedback winding, and the auxiliary power winding for wire feeders. The field feedback winding provides rotor current during machine opera- tion. The output of the RANGER 9 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 9, the printed circuit board activates the idler solenoid, which then brings the engine to a low idle state. When out- put current is sensed, either weld or auxiliary, the print- ed 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 9		RANGER 9

SVM 110-A specifications

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Lincoln Electric SVM 110-A service manual Theory of Operation

Models: SVM 110-A