Chuck Guzis wrote:
  You could also use a motor-alternator setup to
generate your own 3-
 phase current, but I'd think that maintaining good frequency
 regulation under varying loads could be a problem. 
I've used a motor-generator set before.  (I actually still have mine,
but it's not set up right now.)  It seems to be good enough, at least
for a VAX 6000 or an IBM DASD unit.
Peace...  Sridhar