It would take a 12,000 watt generator for thatto get 50 amps for a welder like a Lincoln cracker box(amps x volts = watts).I have welded with one on 30 amps,but it will through the circuit breaker if you push it.That would still be 7200 watts.I have rewired a 100 amp alternator from wye to delta(increases amperage by square root of 3)and fed the output from the three phase to two seperate banks of 50 amp diodes on common heat sinks to make a positive and negative output.I regulated the field with a power rheostat.It puts out great,but is hard to keep an arc going.I was wondering if anyone else had done anything like that and had any luck with it.
: : : Might work.I am really interested in driving a generator or alternator and using just the output from them.
: : : : : : : : : : : Has anyone made or know of plans to make a portable welder from a generator or alternator?: : : : : I have seen them built from old aircraft D.C. generators. : : : : Saw pictures of one once that was built on a lawnmower deck. Had a 3.5 Briggs engine belted to a 12 volt alternator which charged a BIG 12 volt battery. Welding was done with battery power, and the alternator simply re-charged it. Might work for intermittent use. The system would need some means of controlling how much amperage was available at a given time, because a dead short across the battery would provide many times the desired amount. There would also be some safety considerations with such a device, including sparks getting near the gas tank, and the potential of battery explosions due to hydrogen gas accumulation during charging. I'm not saying it's a GOOD idea, just that I saw pictures of one! : : Check in one of the 4wd forums, the Jeep guys are always
: : talking about the for off road field repairs : Why not use a 120/240 5000 watt (or larger) generator and plug a shop welder into it?
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