On Fri, 08 Jul 2005 13:55:08 GMT, RoyJ wrote:

A static phase converter will not do a thing for a transformer type 3
phase welder. It might do OK on an old rotary welder. Some one on
sci.engr.joining.welding NG tried a rotary phase converter. Seems to me
it didn't work as well as expected. I suspect that the inductive load
from the welder interacts with the nade up phase from the converter.
(Hmmmmm sounds like a GREAT final exam question for a EE major!)

But many of the transformer welders will run OK on 2 phase at 2/3rds
power. The output from the transformer goes to a massive diode block,
you are just missing one phase. Not as smooth as full 3 phase but
decent. You may have to experiment with which phase is dead since there
will be fans, control circuits, etc that will be running off a single
phase.

Specifics on which make and model you are looking at would be helpful.

Ignoramus15786 wrote:

Just confirming... there is no easy way to make a 3 phase welder run
on 1 phase power, is that right? I would need a full fledged phae
converter to run one, is that true?

i

I have run my Airco Pulse Arc 300 (3ph) on my 5hp rotary converter
with .35 wire. Worked pretty well, but damn it made the electric
meter spin like a dervish. Ive not tried to run it on single phase
as I loaned it to a buddy who does have 3 phase in his shop, but will
be getting it back soon as his shop has my warehouse attached..and the
City is going to turn it into another badly needed abandoned empty lot
at the first of the month.

Gunner

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the world has a long way to go to regain
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