Need help finding/selecting the right generator for a small wind turbine

[Lukeiy]

Hello!

I've designed a small wind turbine which should absorb 10-20 watts at 450-600 rpm (depending on the tip speed ratio I end up deciding on). I need some help with places to look, and the type of generator I should aim for that will give good reliability.  I would rather go direct drive and avoid the gears but I can't find anything that fits these specifications, any help is appreciated!

[stofanel]

For this kind of power, I would consider stepper motors.

[Lukeiy]

For anyone interested, I found this little guy

http://small-generator.com/buy/index.php?main_page=product_info&cPath=1&products_id=31

Assuming ~60% efficiency it should take about 18W and output 12W at 500RPM

[Bruce S]

That 500RPM to get 6V is a bit steep.
Most stay away from that kind of speed.

Here's a link to our classifieds and what you can get for about $75/US.

http://www.fieldlines.com/index.php/topic,148809.msg1034869/topicseen.html#msg1034869
Being that your flag shows you to be in New Zealand, I'm certain there's something similar available closer that USA .
Otherwise go looking for an ECM motor, unless of course you have a special need for the alternator to be small.

Best
Bruce S