BX3 series AC arc welding machine circuit a

BX3 series (BK series) AC arc welding machine has a moving coil structure, as shown in the figure. There are two types of current adjustment: coarse adjustment and fine
adjustment. For coarse adjustment, the windings can be connected in series or in parallel by changing the switch and changing the connecting piece on the output terminal board .
When the primary and secondary windings are connected in series, it is the I connection method, and when they are connected in parallel, it is the II connection method. Fine adjustment is to turn the handle to move the secondary winding up and down along the iron core column
to change the distance between the primary and secondary windings , change the leakage reactance between them, and thereby change the welding current.