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source for small generator-diy
By Kwazai, Section Newbies Posted on Fri Jan 09, 2009 at 01:09:36 AM MST
small windmill generator 6 to 20watts

its been a while since i've posted, but I'm looking for info in regard to making a small generator for my bicycle wheel windmill. One of my friends recycles computer hardrives and can supply me with magnets, but i'd really rather convert a motor(geardrive cordless drill?) or something similar for use under 100 rpm to produce a few watts. any input would be appreciated. Even a good book recommendation would be helpful.
thanks
Mike

source for small generator-diy | 4 comments (4 topical)

Re: source for small generator-diy (3.00 / 0) (#1)
by gotwind2 on Fri Jan 09, 2009 at 09:17:49 AM MST

Take a look at my experiments using dynamo hubs - up to 5 watts in good winds.
They cog badly, but generate 6 volts at only 60 rpm.

You probably won't be able to find a Sturmey Archer one if your in the states, but there are Chinese copies that are available
http://gotwind.org/diy/Dynohub.htm

Ben.

www.gotwind.org

Re: source for small generator-diy (3.00 / 0) (#2)
by Kwazai on Fri Jan 16, 2009 at 07:00:28 AM MST

I'll keep my eye out for one on ebay. Thanks. Current plan is a conventional bicycle light generator. I saw one modified on your site.
Mike

[ Parent ]

Re: source for small generator-diy (3.00 / 0) (#3)
by Kwazai on Wed Jan 28, 2009 at 07:21:11 AM MST

I picked up a 14$ 12v 6w bicycle generator and it cogs about like expected. My bicycle wheel design would take about 1/2 ftlb. of torque to run (simple weight test to see what it would take to spin). I'm not sure how to go about calculating the diameter necessary for a low wind (2-3 m/s) windmill to drive this thing. My windmill design is sort of like a sail mill. I am assuming it would just need to be a fairly large diameter to pick up the necessary force and could be built like the cretan windmills.
Mike

[ Parent ]

Re: source for small generator-diy (3.00 / 0) (#4)
by Kwazai on Wed Feb 18, 2009 at 02:58:47 PM MST

http://www.youtube.com/watch?v=YCGj5W3UNS4

[ Parent ]

source for small generator-diy | 4 comments (4 topical)

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