Lincoln Electric SVM207-A service manual 1TABLE of CONTENTS-THEORY of Operation Section E-1

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E-1TABLE OF CONTENTS-THEORY OF OPERATION SECTION E-1

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-2

Engine Components and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-2

Rotor, Stator and Control Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-3

Weld Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E-4

FIGURE E.1 BLOCK DIAGRAM

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STARTER	FUEL
	SHUTOFF
SOLENOID	SOLENOID
	STARTER	MECHANICAL
		ROTAT ION

	RANGE
	SWITCH	254	TOROID*
S2	E
		AC
REACTOR		OUTPUT +	CHOKE	POLARITY
		AC BRIDGE		SWITCH
		--
W2	C1 WAC W1
WELD WINDINGS

AUXILIARY

WINDINGS

ELECTRODE TERMINAL

WORK TERMINAL

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			ENGINE
		FLYWHEEL ALTERNATOR/
			VOLTAGE REGULATOR
			IDLER
			SOLENOID
	4		OIL
1			PRESSURE
	ENGINE		SWITCH
		3
	CONTROL
	SWITCH*	2
	+	-	HOUR
			METER
	BATTERY		OUTPUT
			CONTROL

SLIP

RINGS

FLASHING

DIODE

FIELD CAPACITOR

	ROTOR	STATOR	Z	Y
				3
				5
	EXCITER			6
	WINDING
7	9			X
		3 6 X	TOROID*

Z X Y

120 & 230 VOLT	480 VOLT 3 PHASE
BREAKERS AND	BREAKER AND
RECEPTACLES	RECEPTACLE

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*	Lead 254 - 1 turn through the toroid
PRINTED CIRCUIT	Leads 3 & 6 - two turns through the toroid in opposite directions.
BOARD	Lead X passes though the toroid in the same direction as lead 6

RANGER® 3 PHASE