We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary.

Update: DIY Amp Hour meter for monitoring charge!

All about homebrew wind and offgrid power systems, the complete reference!

Step 1: Build the magnet disks

We had 12" steel disks hydro cut. We cut a template for mounting the magnets. Then we mounted 12 grade n50 magnets around the outside edge. We then built a form, and poured the resin with hardner.
<p>what is the rpm needed for this generator to make 1.000 watt</p>
about 650 rpm or so.
<p>Resins are sold in specialized chemical supply stores in my country, and they are far away from my location.<br><br>I'm wondering if I could use <em><strong>other materials for casting the stator</strong></em>. Would it work if I've cast the stator in say mastic of marble putty with hardener, gypsum plaster, or concrete cement.<br>Will that affect magnetic flux intensity between the opposite poles through coils?</p>
Have you tried marine or automotive places? Both use fiberglass and hardeners. Bondo used in body repair could work.
<p>Thank you for the quick reply!</p><p>I'll visit auto body workshops who use fiberglass. but for curiosity, do I need specific electrical properties for the material used for casting the stator ? anything in materials I mentioned may affect the produced power efficiency ?</p>
<p>Make sure there is no metal. other than that, you are good.</p>
<p>I wish you could have finished this instructable, and added the links for credit, instead of making me go and look :/ </p>
<p>what a nice project! good job!</p>
<p>Where am I able to see the complete instructable of this entire wind turbine project from start to finish?</p>
There are many builders who have posted their information in the discussion group, and the files section. Others have posted at otherpower.com. A project like this is difficult to reproduce in this medium, it really takes video or hands on, which is why various groups give hands on classes. It's a very technical project.
<p>Thank sspence! I enjoyed your post! Hope to some day be able to do something like this. Awesome!</p>
<p>What a wonderful work. In my region, i have either no, or too much wind... zero to two mph's or around gusty 80's for a short time ;-) That's why we tend to do PV around here... but your project is really cool. If i did something similar, i'd have to go hydro.(maybe not this summer....) But i really like your way.(not only charging a smartphone ;-)))</p>
<p>As I am 71 years young Consulting Engineer[ Reverse Engineering ] &amp; Geophysicist; staying in tropical zone where the wind velocity of 30mph[48Kmph] is almost rare and for very short time to the extent of about couple of hours except Himalayan Ranges. So I am also keen in designing such a vertical wind mill with steady stator at center and permanent magnet rotor very similar to ceiling fan which is in a position to generate at say 3mph[5Kmph] with rating of about 20 to 25 watts at the cost of say $30-35v as appropriate acceptable &amp; affordable technology. Hoping for the response. rameshbhides@gmail.com</p>
<p>Good luck. I've found verticals to not be worth the time or expense. </p>
<p>I feel like I just got half a blowjob, The one thing I find annoying is having to go to another site sign up for no other reason than to learn more about what you could have posted here in the first place. You took the trouble to come here and post something, why not post it all? Its like like sex, go all the way or fucking forget it.</p>
<p>sorry, I was a little blunt, had a bad day.</p>
Okay thanks. That would be 1% of the time for me. Normally 5 mph 99% of the time here. Guess I would need a very big one.
Wind turbines are rated at 30 mph. That does not mean you will produce that much power all the time, but it's the way to compare to other wind turbines. 1000 watts is the maximum this can produce. The calculator at http://www.green-trust.org/windpowercalc/ will let you calculate how much power you can produce at various wind speeds.
No way, no how , will that wire generate 1000 watts. I think you misplaced a decimal point.
You would be wrong. It's only 41 amps at 24v. Don't forget, it's 3 phase.
I Read Hugh piggots plans and he quotes 100 watts not 1000.<br>You don't give much information on wind, rpm, etc. Where can I find that information?<br>Am I right in thinking each coil is putting out 24v @15 amps?
<p>This is a bigger unit than Hugh Piggott's. 8' blades, 30 mph wind, 650 rpm</p><p>each coil puts out 8v @ 13 amps. 3 coils in series makes 24v @ 13 amps per phase. </p>
<p>Good job !</p>
<p>what type of magnet do you used ceramic or neodymium magnet type....</p>
Neodymium, N42 or greater.
<p>One of my favorite instructables! had to check it again :))</p>
Thank you!
<p>super project, how to use a grid tie with maximum efficiency <a href="https://www.patriotdirect.org/how-to-use-a-grid/" rel="nofollow">https://www.patriotdirect.org/how-to-use-a-grid/</a></p>
<p>how much rpm do i need to get 12v supply</p>
This unit is designed to run at 650 rpm.
<p>great project. I am impressed by the number of views!!</p>
I'd like to know how many actually went out and built one :-)
<p>Me too. Your project looks really cool, but I don't think it's as easy to do as it looks. I personally love doing paper and cardboard crafts, but when it comes to technology, I'm useless.</p>
<p>You can't do it from the information given. You need to join their group or pay a subscription fee. Then you get the information. </p><p>If you want the complete information free written by Hugh Piggott who has many years experience doing this then here is his pdf. </p><p><a href="https://practicalaction.org/docs/energy/pmg_manual.pdf" rel="nofollow">https://practicalaction.org/docs/energy/pmg_manual...</a></p>
<p>Dennis,</p><p> While I understand that upon first seeing the Yahoo group &quot;Restricted&quot; designation, you may think that you would have to pay, etc, but before actually going through the process of logging into Yahoo groups, then trying to join the group, please keep in mind that complaining in the comments that you have to pay, or go through some complicated process to get the info, to a lesser level - MANY groups on the Yahoo site, and others ask that you click the join button, and a group admin manually adds you to keep the thousands of bot-created ads down in the posts. This has been the case since the mid-90's with BBS forums, etc as well. Nothing new here..</p><p>On a side note to everyone else...</p><p>I agree that the PDF's, and &quot;full&quot; information should be shared on this site, and that it is against the spirit of the site for the author to say they are only using this as an instructable for what is possible, instead of how to actually do it. I believe this is more of an ad for &quot;Come join our Yahoo Group so we have more views!&quot; than anything else, as even basic safety info is left out. It's concerning that someone might try to put one of these together after seeing the wait-wall in the group application process, and hurt themselves.. Much more care should have gone into the info actually shared, vs the baiting to join a forum..</p><p>sspence, please clear up the confusion and take your instructions/posts/etc regarding this turbine that you have in the Yahoo group, and post them as attachments here on this site, and link to your group for questions, other learning, etc..</p>
<p>I agree with you Mikerosati</p>
<p>omg Dennis i just signed up to instructibles to tell you that you are a troll leave the guy alone,his yahoo group is free get over it</p>
<p>Hey dude,</p><p>Feel free to post your instruction in here too. There is absolutely no fee and people are burning for your great ideas</p>
<p>There is no subscription fee, and the group is free. there's a lot more storage for files there, and many group members have posted their instructions as well.</p>
<p>Oh my God, this is awesome!</p>
<p>very interesant</p>
<p> why not make a vertical windmill with flaps .wind force in any direction.90%wind force not 45%.can be any height any diameter.</p>
They don't work anywhere near as well as a HAWT. Try it, and then get back to me. You will see. That 90% is bogus.
<p>Hey, cool device, but I was wondering how much in total the device weighs in pounds?</p>
under 100 lbs, with blades.
What size magnets did you use?
1&quot; x 2&quot; x 1/2&quot;
<p>I agree with Jemurray976 ...This is not a DIY - it's an advertisement to buy the DIY document. My understanding was that this is a place to share knowledge not sell it, if this is true then agreed, this advertisement has no place here.</p>
<p>You don't have to buy anything. all the details are free. I'm not selling anything.</p>

About This Instructable


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Bio: Professionally, I'm an IT Engineer (Executive Level) and Electronics Tech. I'm a Amateur Radio Operator (KK4HFJ). I lived off grid, with Solar (PV ... More »
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