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Earth Turbines Inc


By Warrior, Section Wind
Posted on Tue Nov 03, 2009 at 06:45:54 PM MST
These guys use a direct drive (gearless) induction generator. 2.5 Kw 14 foot

Hi fellas!

I was reading an old Mick Sagrillo document and he mentioned some new manufacturers using induction generators, one of which was Earth Winds..

I'm really curious as to how they get away in direct driving an induction generator at low speeds and grid tieing it.

I'm guessing electronics, but does any one around here have any clue on how it may work? Their site is not very informative...

As far as I know, induction generators need to be run about 10% above the synchronous speed to begin feeding power back to the grid. I doubt they've done this with a multi pole generator but I may be wrong.

Here's the link:

http://www.earthturbines.com/

Sorry if this was posted in the wrong section or is inappropiate. Admin can remove at will ;)

Thanks,
Earth Turbines Inc | 1 comment (1 topical)

Re: Earth Turbines Inc (3.00 / 0) (#1)
by neilho on Wed Nov 04, 2009 at 03:02:20 PM MST

I believe this is a fairly large diameter, many more poles than usual, custom generator. The idea behind it is to NOT have electronics or a synchronous inverter, for reliability and cost reasons. They've been in the beta testing phase for a couple years.

Earth Turbines is a company formed by David Blittersdorf, who's also the founder of NRG Systems.

Neil

 



Earth Turbines Inc | 1 comment (1 topical)
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