Power Board_Pcb2 Output Circuit (0558038315) - ESAB Powercut 1600 Service Manual

SECTION 4 DESCRIPTION Of OPERATION
4.10.10

Power Board_PCB2 Output Circuit (0558038315)

The Output Circuit on the power board consists of the rectifier diodes, the snubber, the output inductor and
a pair of Hall sensors.
The output diodes D103 and 104 are connected directly to the power board. AC Power from the output
transformer is connected to these two diodes at the negative terminals. This 18 KHz output is rectified to
DC and then passed through the Hall sensors and out to the Electrode, Pilot Arc Lead and Work lead.
The Hall devices sense the current level and send a current sense signal to the control board where it is
used internally by the microprocessor and sent to the display board.
Hall sensor T5 detects torch and pilot arc current. Hall sensor T4 detects only the work current.
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