Output Rectifier And Choke - Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual

E-6
THREE
PHASE
INPUT
POWER
INPUT
LINE
SWITCH
PROTECTION
BOARD

OUTPUT RECTIFIER AND CHOKE

The Output Rectifier receives the AC output from the
Main Transformer secondary and rectifies it to a DC
level with a 40 kHz ripple.
Since the Output Choke is in series with the positive
leg of the Output Rectifier and also in series with the
welding load, a filtered DC output is applied to the
machine output terminals.
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
THEORY OF OPERATION
FIGURE E.6 – OUTPUT RECTIFIER AND CHOKE
INPUT
RECTIFIER
INPUT AND
CONTACTOR RECONNECT
LEFT
SWITCH
BOARD
FET
ASSEMBLY
AUX.
TRANS
RIGHT
SWITCH
BOARD
FAN
FET
ASSEMBLY
POWER
BOARD
WATER
COOLER
PC
INTERFACE
POWER WAVE 450
MAIN OUTPUT
TRAMSFORMER
RECTIFIER
CT
SNUBBER
SENSE LEADS
CONTROL
BOARD
LCD
DISPLAY
DISPLAY
BOARD
KEYPAD
OVERLAY
WF1 WF2
E-6
CHOKE POSITIVE
NEGATIVE
SHUNT
AND