Theory of operation, Output rectifier and choke, E-5 invertec® v450-pro – Lincoln Electric INVERTEC SVM199-A User Manual
Page 37
THEORY OF OPERATION
E-5
E-5
INVERTEC® V450-PRO
OUTPUT RECTIFIER
AND CHOKE
The output rectifier receives the AC output from the
main transformer secondary and 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. See Figure E.5.
FIGURE E.5 - OUTPUT RECTIFIER AND CHOKE
NOTE: Unshaded areas of Block Logic
Diagram are the subject of discussion
INPUT
CONTACTOR
INPUT
RECTIFIER
R
E
C
O
N
N
E
C
T
CONTROL BOARD
RIGHT
SWITCH
BOARD
LEFT
SWITCH
BOARD
MAIN
TRANSFORMER
CURRENT
SENSOR
CHOKE
OUTPUT
TERMINAL
OUTPUT
TERMINAL
POWER
BOARD
115VAC
RECEPTACLE
P
O
W
E
R
S
W
I
T
C
H
I
N
P
U
T
B
O
A
R
D
FAN
MOTOR
AUX.
TRANS.
AUX.
TRANS.
RECTIFIER
AUX.
RECONNECT
PRIMARY
CURRENT
SENSOR
WIRE FEEDER
RECEPTACLE
RS232
CONN.
THERMOSTATS
STATUS
LIGHT
THERMAL
LIGHT
CURRENT FEEDBACK
VOLTAGE FEEDBACK
65VDC
40VDC
CONTROL SIGNALS
PWM
DRIVE
CAPACITOR
VOLTAGE
FEEDBACK
CAPACITOR
VOLTAGE
FEEDBACK
PWM
DRIVE
VOLTAGE
SENSE
RECEPTACLE
#1
#2
S
W
I
T
C
H
INPUT
CONTACTOR
INPUT
RECTIFIER
R
E
C
O
N
N
E
C
T
CONTROL BOARD
RIGHT
SWITCH
BOARD
LEFT
SWITCH
BOARD
MAIN
TRANSFORMER
CURRENT
SENSOR
CHOKE
OUTPUT
TERMINAL
OUTPUT
TERMINAL
POWER
BOARD
115VAC
RECEPTACLE
P
O
W
E
R
S
W
I
T
C
H
I
N
P
U
T
B
O
A
R
D
FAN
MOTOR
AUX.
TRANS.
AUX.
TRANS.
RECTIFIER
AUX.
RECONNECT
PRIMARY
CURRENT
SENSOR
WIRE FEEDER
RECEPTACLE
RS232
CONN.
THERMOSTATS
STATUS
LIGHT
THERMAL
LIGHT
CURRENT FEEDBACK
VOLTAGE FEEDBACK
65VDC
40VDC
CONTROL SIGNALS
PWM
DRIVE
CAPACITOR
VOLTAGE
FEEDBACK
CAPACITOR
VOLTAGE
FEEDBACK
PWM
DRIVE
VOLTAGE
SENSE
RECEPTACLE
#1
#2
S
W
I
T
C
H