Output Rectifier And Choke - Lincoln Electric POWER WAVE SVM135-B Service Manual

E-8
S
P
W
O
I
W
T
E
C
R
H
AUX.
RECONNECT
OUTPUT RECTIFIER
AND CHOKE
The output rectifier receives the AC output
from the main transformer secondary and
THEORY OF OPERATION
FIGURE E.7 — OUTPUT RECTIFIER AND CHOKE.
PWM
DRIVE
INPUT INPUT
CONTACTOR RECTIFIER
R S
E
W
C
O I
N
T
N
E C
C
H
T
I B
N O
P A
U R
T D
CONTROL SIGNALS
#1 AUX.
RECTIFIER
TRANS.
65VDC
#2 AUX.
TRANS.
FAN
MOTOR
POWER
BOARD
40VDC
WIRE FEEDER
115VAC
RECEPTACLE
RECEPTACLE
POWER WAVE 455/POWER FEED 10
MAIN
TRANSFORMER
LEFT
SWITCH
BOARD
PRIMARY
CURRENT
SENSOR
CAPACITOR
VOLTAGE
FEEDBACK
RIGHT
SWITCH
BOARD
CAPACITOR
PWM
VOLTAGE
DRIVE
FEEDBACK
CONTROL BOARD
STATUS
THERMAL
VOLTAGE
RS232
LIGHT
SENSE
CONN.
RECEPTACLE
rectifies it to a DC voltage level. Since the
output choke is in series with the negative
leg of the output rectifier and also in series
with the welding load, a filtered DC output is
applied to the machine output terminals.
Refer to Figure E.7.
CURRENT
SENSOR
OUTPUT
TERMINAL
CHOKE
OUTPUT
TERMINAL
THERMOSTATS
CURRENT FEEDBACK
VOLTAGE FEEDBACK
LIGHT
E-8