My question was not well worded. I know that the system will work.
What I need to know is how do I determine values for the capacitors
and possible buck boost transformer on the third leg to match the
grid voltage and to achieve a power factor of .95 or so.
Thanks
Dave
--- In [email protected], Steve Spence <[EMAIL PROTECTED]> wrote:
>
> The rule of thumb for engine genrators is 2hp / 1kw of electric.
>
> Steve Spence
> Dir., Green Trust
> http://www.green-trust.org
>
> Contributing Editor
> http://www.off-grid.net
> http://www.rebelwolf.com/essn.html
>
> Ranjitkar, Ghanashyam wrote:
> >
> > Hi,
> >
> > With 25hp or 18.65kW motor, it should be possible to generate at
least 15kW
> > of power in generator mode. 11kW seem very cautious.
> >
> >
> > Ghanashyam
> >
> > -----Original Message-----
> > From: Nando [mailto:[EMAIL PROTECTED]
> > Sent: Monday, April 11, 2005 5:41 PM
> > To: [email protected]
> > Subject: Re: [microhydro] 3 phase motor as generator for net
metering and
> > then some
> >
> >
> >
> > Dave:
> >
> > The method described by you is an standard method used to run 3
phase motors
> > with single phase, the capacitor is used to generate the quasi-3
phase for
> > motor biasing, therefore if used as a Grid Tied Generator the
capacitor will
> > supply the magnetic field for power generation.
> >
> > The KW that can be generated by this motor would be the motor
rating divided
> > by 1.73, so if you have a motor that is 25 HP= 18.65 KW, as a
single phase
> > Grid tied generator, the available power would be 11 KW.
> >
> > Regards
> >
> > Nando
> >
> > ----- Original Message -----
> > From: "Dave Blaze" <[EMAIL PROTECTED]>
> > To: <[email protected]>
> > Sent: Sunday, April 10, 2005 8:37 AM
> > Subject: [microhydro] 3 phase motor as generator for net
metering and then
> > some
> >
> >
> >
> >>
> >>
> >>Some years ago I met a fellow in Vermont who was generating power
> >>and net metering (I think the power company knew about it) He was
> >>using a 3 phase motor which had 2 legs tied to the grid and the
> >>third leg had some excitation / power factor capacitors on it. He
> >>also was using a buck boost transformer on the third leg to
control
> >>the voltage output and the power factor (so he claimed) I have
> >>original drawings showing all this that he submitted to Western
Mass
> >>Electric many years ago. His name is Ray Miller and his company
was
> >>called Harrisville Mill Service. He is mentioned in the book by
> >>George Butler and when I visited George before he died, he
suggested
> >>I go visit Ray since he was only a few miles away. What a day
that
> >>was!
> >>
> >>Anyone out there know about Ray or any of his installations, or
the
> >>use of a three phase motor to generate power for net metering on
a
> >>single phase system?
> >>
> >>While I have your attention, I am looking for small home built
> >>hydroelectric installations in New England to go look at and
> >>photograph. I have found a half dozen or so but I'm sure there
are
> >>more.
> >>
> >>Thanks
> >>
> >>Dave
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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