Supply To 2Ap1 - ESAB Caddyt Arc 150i Service Manual

Supply to 2AP1

The board supplies power supply board 2AP1 with 325 V DC (pins F1 and F3, connector
15XS1).
Gate driver stages
Transformer TR1 is a gate driver transformer for galvanic isolation of the drive circuits from
controller board 20AP1. Fuses S10 and S20 protect the gate driver circuit if the IGBT
transistors fail.
Switching circuit
The switching transistors are integrated in the semiconductor module. They are parallel--
connected three and three.
S0740 800 161/E061205/P66
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