Re: 3-Phase motor running from Single Phase Supply ?

Sorry for the stale response. I'm trying to get this *@#%$^ Yahoo
setup. Getting the posts to be most recent first is a pain.

http://groups.yahoo.com/group/cad_cam_edm_dro/messagesearch

will show the most recent at the top, and you scroll down
to get older stuff.

Cheers

--- In CAD_CAM_EDM_DRO@y..., davemucha@j... wrote:
> Hi,
>
> you don't need to get overly complicated. Suffice it to say you
> cannot afford to get 3 phase from the power company.
>
> You can buy a 3 phase converter. They make an electronic converter
> that takes single phase in and outputs 3 phase. MANY shops use
this
> to run 3 hp Bridgeports.
>
> Lathes would be better off by using a rotary converter, more money,
> but better sine wave output for more even power.
>
> Expect about $125 US for a 5 hp electronic and near $300 for a
rotary.
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., Matt Shaver <mshaver@e...> wrote:
> > Chris Hellyar wrote:
> > > Is it a major task to get 3 phase in some other parts of the
> world where
> > > people are posting from?
> >
> > In the US, 3 phase power is generally only available to industrial
> > areas. If you wanted it in a residence, you would have to pay the
> entire
> > cost of stringing up the power lines from wherever the nearest 3
> phase
> > power was to your location. As most power companies are
unionized,
> just
> > the labor alone could run into the tens of thousands of dollars.
> Even if
> > you were willing to pay the cost, the next problem you'll have is
> from
> > the zoning authorities. I don't know how things work in NZ, but
in
> the
> > US different areas are designated for different uses such as
> residential
> > (houses), commercial (stores), and industrial (machine shops,
etc.).
> > It's illegal in most areas to have machine shop in your home, if
> you do
> > work for hire. If you're strictly a hobbyist, that's probably OK,
as
> > long as the neighbors don't complain about the noise, smell, or
> tractor
> > trailers delivering steel and machinery to your house. The local
> zoning
> > board (which would find out about your 3 phase power installation
> from
> > the permit you would need for the electrical work) might get the
> idea
> > that having three phase power puts your operation beyond
> the "hobbyist
> > class". Also, the inspector that comes to check the wiring might
> rat you
> > out to the zoning department if he looks around at your shop and
> thinks
> > you've got some type of business going in your home. The worst
case
> is
> > that they take you to court, fine you a couple grand, and force
you
> to
> > get rid of your machinery.
> >
> > All that said, I know of lots of machine shops in houses (mostly
> small
> > commercial job shops ;) ). They "get away with it" by keeping a
low
> > profile and camouflaging their operation as best they can. As an
> > example, I never leave my garage door open because I don't want
> anyone
> > to see my machines and decide to notify the authorities.
Actually, I
> > live in an older neighborhood and my neighbors could care less
what
> I do
> > (and I, them), but in the newer neighborhoods that have community
> > organizations and restrictive covenants (rules you have to follow
> such
> > as what color you are allowed to paint your front door), you
could
> have
> > real trouble.
> >
> > In short, yes, it's a major task.
> >
> > Matt (who lives in the land of the free, sort of...)