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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’s output terminals.
THEORY OF OPERATION
E-5 E-5
V350-PRO
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FIGURE E.5 – OUTPUT RECTIFIER AND CHOKE
Remote
Board
Mode
Panel
Display
Panel
Control Board
Choke
Positive
Output
Te rminal
Negative
Output
Te rminal
To Control
Board
Current
Feedback
Reconnect
Switch
Output Voltage Sense
Input switch
Input
Rectifier
Auxiliary
Transformer
Fan
Power
Board
14 Pin
Amphenol
6 Pin
Amphenol
Remote Control & Trigger
RS232 Supply +5VDC
SPI Supply +15VDC +5VDC
Machine Control Supply
+15VDC, -15VDC, +5VDC
40VDC
28VAC
24VAC
115VAC, 42VAC
Main Switch Board
115VAC Fan Supply
Optional Solenoid
SPI Communications & +15VDC, +5VDC Supply
Fan Control
V/F Capacitor Feedback (2)
Soft Start Control
Input Relay Control
Primary Current Feedback
IGBT Drive Signal
Primary
Current
Sensor
Primary
Current
Sensor
Output
Potentiometer
Output
Control
Weld
Terminals
Advanced
Process
Panel
RS232
12 VDC
(Not used if APP
is in place)
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.