Section e theory of operation, Theory of operation – Lincoln Electric IDEALARC SP-250 Manuel d'utilisation
Page 40
THEORY OF OPERATION
IDEALARC SP-250
Figure E.1 -Block Logic Diagram
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
THEORY OF OPERATION SECTION ...................... Section E
Power Supply Operation ........................................E-1 - E-3
Input Line Voltage and Main Transformer ...................E-1
Output Rectification and Feedback Control ................E-2
Constant Voltage Output .............................................E-3
Wire Drive Motor and Feedback .................................E-4
Thermal Protection ...........................................................E-5
SCR Operation ............................................................... E-6
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
LINE
SWITCH
MAIN
TRANSFORMER
RECONNECT
FAN
MOTORS
SCR
RECTIFIER
C
A
P
A
C
I
T
O
R
S
SHUNT
CHOKE
WIRE
DRIVE
MOTOR
TACH
POSITIVE
TERMINAL
NEGATIVE
TERMINAL
GAS
SOLENOID
PIEZO
ALARM
KEYPAD
CONTROL BOARD
FEEDBACK
GUN TRIGGER AND THUMB SWITCH
F
E
E
D
B
A
C
K
G
A
T
E
I
G
N
S
A
L
LCD
DISPLAY