RE: phase conversion

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Thomson" <dave-at-volantis-dot-org> 

Hi Eric,

 > Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >
 > why not just have a large electric or gas motor run a homemade 3 phase
 > alternator? getting the rpm's right for 60 hz might be a bit tricky, but
 > it'd work even if ineffecient.

It's a little more complicated than that.  I have already built such a unit.
It's been nearly a year, so I don't remember the details, but it only put
out something like 2 volts.  Something has to happen inside the alternator
to get the magnetic field built up properly.  Someone told me to put a DC
current over one of the legs for a minute or so to kick start the magnetic
field, but that didn't work either.

Dave


 >
 > ---eric
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Tuesday, March 30, 2004 7:53 PM
 > Subject: RE: phase conversion
 >
 >
 >  > Original poster: "David Thomson" <dave-at-volantis-dot-org>
 >  >
 >  > Hi Matt,
 >  >
 >  > I've been talking to experts concerning three-phase power for
 > some time.
 >  > The only way to get true three-phase power is to either buy it from the
 >  > utility company (and learn to continually balance the lines)
 > or generate
 > it
 >  > yourself with a true three-phase generator.
 >  >
 >  > Phase converters allow you to run a three-phase motor using two of the
 > three
 >  > phases.  In all cases, you end up with a silent leg (some call it a
 > phantom
 >  > leg, it's all the same).  If all you want to do is run a three-phase
 > motor,
 >  > that's fine, a phase converter will work.
 >  >
 >  > I've been wanting to generate true three-phase power so I
 > could produce a
 >  > rotating magnetic field from a stator without a rotor.  I still haven't
 >  > succeeded because I can't afford the expensive three-phase
 > power from the
 >  > utility company or the expensive three-phase generators.
 >  >
 >  > Well, I actually purchased three working 100kV three-phase
 > generators from
 >  > the military for $25 at a military auction.  But the generators were so
 > huge
 >  > I needed a flat bed semi to haul them and a pretty hefty
 > forklift to move
 >  > them.  I ended up abandoning them.
 >  >
 >  > Dave
 >  >