On Mon, Aug 11, 2014 at 11:24 PM, Lee Hart <[email protected]> wrote: > Yes, you need to remove the magnetic shunts. These are rectangular blocks of > laminations tack-welded into the space between the primary and secondary. > This restores the core to a normal E-I laminated stack.
I wasn't referring to the shunts. If you remove both the primary and secondary in order to use the core to make an inductor, it would be hard to leave the shunts in place, at least in my experience... I meant the center bar of the E, leaving a C shape. > Since the wire will be carrying 100s of amps, it needs to be very thick. > It's hard to wind such thick wire. A better alternative is to use many > smaller strands in parallel. Or, use a long strip of sheet copper flashing. > Put a paper "cuff" around it, or tape or other insulation. The voltage per > turn is low, so not much insulation is needed between turns. For my spot welder, I found it difficult enough to wind three turns of two parallel 8awg wires into the secondary space that I had cut out of a 1500W GE microwave oven transformer. That was before I found myself with leftover 4awg welding cable from my tractor conversion, so if I use that spot welder any more I'll probably change to the welding wire to be able to carry more current and not get as hot. ☺ _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
