Lincoln Electric RANGER 225 GXT Service Manual page 35

TABLE OF CONTENTS-THEORY OF OPERATION SECTION
E-1
Theory of Operation .............................................................................................................Section E
Battery, Starter, Engine, Excitation, Rotor,
Stator and Idler Solenoid....................................................................................................E-2
Rotor Field Feedback and Auxiliary Power ...........................................................................E-3
Weld Winding, Reactor, and Range Switch...........................................................................E-4
Output Bridge, Choke, Polarity Switch, and Output Terminals ..............................................E-5
FIGURE E.1 RANGER® 225 GXT BLOCK LOGIC DIAGRAM
A L T E R N A T O R S W I T C H O I L B A T T E R Y S W I T C H P R E S S U R E R U N - + S T A R T I G N . S T A R T E R F L Y W H E E L F U E L H O U R + + L D T O R R O I D 2 3 0 V O L T F I E L D R I N G S S L I P R O T O R R O T A T I O N M E C H A N I C A L E X C I T E R 1 1 5 V O L T C A P A C I T O R ( A U X & W E L D ) R E A C T O R B R E A K E R S A C T A P A C - O U T P U T B R I D G E C H O K E M E T E R P O L A R I T Y S O L E N O I D S W I T C H A U X E L E C T R O D E A U X T E R M I N A L S O L E N O I D W O R K I D L E S E N S E T E R M I N A L A U X C V W E A U X - R O T O R B O A R D S T A T O R S T A T O R E N G I N E O U P U T C O N T R O L P R I N T E D C I R C U I T I D L E R
R A N G E S W I T C H
FUEL
SOLENOID
ENGINE
STARTER
FLYWHEEL
ALTERNATOR
OIL
PRESSURE
START
SWITCH
IGN.
RUN
SWITCH
HOUR
METER
-
+
BATTERY
RANGE
SWITCH
REACTOR
WE
STATOR
MECHANICAL
ROTATION
ROTOR
SLIP
ROTOR
RINGS
STATOR
IDLER
SOLENOID
EXCITER
FIELD
CAPACITOR
+
-
PRINTED CIRCUIT
BOARD
RANGER® 225 GXT
AC
+
OUTPUT CHOKE
BRIDGE
AC
-
CV
TAP
LD
(AUX & WELD)
IDLE SENSE
AUX
TORROID
115 VOLT 230 VOLT
OUPUT
AUX
CONTROL
E-1
ELECTRODE
TERMINAL
POLARITY
SWITCH
WORK
TERMINAL
AUX
BREAKERS
AUX