Lincoln Electric SVM192-A Weld Winding, Reactor, And Range Switch, Theory Of Operation

E-4	THEORY OF OPERATION	E-4
	FIGURE E.4 – WELD WINDING, REACTOR, AND RANGE SWITCH

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MECHANICAL

ROTATION

STARTER ENGINE

FLYWHEEL

ALTERNATOR

IDLER

SOLENOID

BATTERY

OUTPUT

CONTROL

RANGE

SWITCH

	AC
	OUTPUT	CHOKE	POSITIVE
REACTOR	AC BRIDGE		TERMINAL
			NEGATIVE
			TERMINAL

STATOR

ROTOR

SLIPROTOR

RINGS

STATOR

TOROID

FIELD

CAPACITOR

115 & 230VAC

RECEPTACLES

PRINTED CIRCUIT

BOARD

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WELD WINDING, REACTOR, AND RANGE SWITCH

The stator weld winding is connected to the reactor and range switch. The inductance in the reactor offers an impedance to current flow. The reactor coil is tapped at various points. As the range switch is rotated, dif- ferent amounts of reactor coil are brought into the cur- rent path. As more turns of reactor are brought into the circuit, the more impedance there is to current flow. Simply stated, the more reactor in the circuit, the lower the welding current.

OUTPUT BRIDGE, CHOKE, AND OUTPUT TERMINALS

The AC voltage developed in the stator weld winding is delivered, through the reactor and range switch, to the output bridge. The DC output current path is from the Output Bridge, where the AC voltage is rectified to a DC voltage, and then through the choke, where the DC output is filtered and on to the Output Terminals.

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

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