Neil,

There is a book, "Motors as Generators for Micro Hydro" that goes
through the theory and practice of converting induction motors to production
use. Although it is geared toward hydro applications most of the info on
induction motors is applicable to wind, although I have never tried it and
perhaps there are additional considerations. The book goes into detail
on how to properly set up capacitors for self-excitation, including how much
capacitance is recommended, how to wire it up for 3 phase, how to select
a proper motor, etc. It also discusses advantages and disadvantages of
using induction motors to produce power.

The book is published by "Intermediate Technologies". My web site sells it,
http://www.picoturbine.com/booklist.htm#IT

(sorry for the crass commercialism).

Neil Hochstedler wrote:

> Does anyone have any experience using induction motors as standalone
> generators? Sounds like an oxymoron but I've seen tantalizing references on
> the net to such a thing, and a reference to a piece in Home Power (which I
> couldn't find).
> I assume, from my work with WTG dynamic braking, that capacitance is
> necessary for self-excitation. Beyond that, I dunno.
> Anybody out there done this or know how to do this? Used 3-phase motors
> sure are cheap!

-Steve Pendergrast
http://www.picoturbine.com