Mother earth news has a diagram of a IGC you can build.
look on the web at www.motherearthnews.com
I think it is in issue #91 Jan/Feb 1985
Chad
--- In [email protected], Carlos Bonifetti <[EMAIL PROTECTED]>
wrote:
>
> Hi Ricardo, Duncan and all:
>
> Duncan hint is another good one. I think that solution with IMAG'S
and IGC's
> is cheaper than a pico hydro DC-Inverter combination for greater
power, but
> I havn't no numbers rushed about that comparison.
>
> Carlos
> -------------------------------------------------
>
>
> ----- Original Message -----
> From: "hwmdu" <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Wednesday, December 22, 2004 7:09 PM
> Subject: [microhydro] Re: Looking for pico I.G.C.
>
>
>
>
>
> Hi Ricardo,
> I have played with induction generators and ended up using DC
> instead. DC is low safety risk, tolerates variable flow, directly
> charges batteries. Use a large battery and an inverter if you need
> AC. Main disadvantage of DC is cabling if the turbine is remote.
> The purpose of the IGC is to keep the load constant. This keeps rpm,
> frequency and volts constant. I'm not sure of Nigel's book, but this
> can be achieved by using two way switching on every load and
> connecting to a dummy load when the device is switched off. For
> example a light bulb to light the room or an equivalent power water
> heater when off. This is a relatively low tech solution. A voltmeter
> to keep track of voltage is also necessary.
> An uninterruptible power supply(UPS) is vital to protect sensitive
> electronics if you try this technique. These are often available
> cheap when the batteries are shot. A quality modern UPS should have
> power factor correction, so should make a good load for an induction
> generator. The best UPSs can take a wide input voltage range and
> generate a steady sine wave output without using the batteries. You
> may find that you can use such a UPS in place of an IGC, possibly
> using some load compensation by two way switching for large loads.
> You will need to provide capacitors across the motor terminals to
> provide magnetising current. A UPS will also help if you want to
> drive induction motors.
> I have replaced dead UPS batteries with a much larger bank of good
> batteries. This seems to work fine, the UPS acts as a battery
charger
> and inverter combined, but the charging rate is limited. The
> manufacturer would object of course. If you are not certain on
safety
> aspects stick to low voltage DC.
> Duncan Irvine.
>
> --- In [email protected], Ricardo Tsukamoto <[EMAIL PROTECTED]>
> wrote:
> >
> > Dear colleagues,
> >
> > I need to provide electricity to two houses used for biological
> research
> > in the Brazilian rainforest. For that, I�m assembling a
picohydro
> > installation using an induction motor (1 HP trif. 220 VAC) as
> generator
> > directly coupled to a turgo turbine (supplied by Joseph
> Hartvigsen), and
> > following instructions given in the books by Nigel Smith (Motors
as
> > Generators) and Phillip Maher (Pico Power Pack).
> >
> > I was able to acquire almost all the components, but just
could�n
> get
> > the electronic load controller (Induction Generator Controller) of
> the
> > type devised by Prof. Nigel Smith.
> >
> > Accordingly, is such I.G.C. available in South America (especially
> in
> > Brazil) or is there a way to obtain a copy of its design ?
> >
> > Thanking for your kind cooperation,
> >
> > Best Regards,
> > Ricardo Y. Tsukamoto, Ph.D.
> > Sao Paulo, Brazil
>
>
>
>
>
>
>
>
>
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