My (old) wind turbine.
64 inch diameter blades.
Magnet Rotor: 1 - 8", 3/16" steel disc with 12 - 2" x 1" x 1/4" wedge magnets (windstuffnow.com)
2nd Rotor - 3/16" steel disc only (no magnets)
Stator: 9 coils wired in star, each coil 120 turns of #22 AWG wire.
Location: Coastal Florida, USA (Flagler Beach)
Building the (what do you call the bearing assembly part of a mill). If that looks like a pvc toilet flange, it is. The base of my assembly was the 2 little 1 1/4" pvc bushings I got from ACE hardware that held very nicely a $3.09 bearing also from ACE. The piece is a 1" to 1 1/4" adapter bushing and the place where the bushing fits is incidental to the design not where a pipe goes in, but just a shallow indent. Bushings from home depot of the same type do not work because the design is a little different. The bushing is on the right end of the assembly and there is another one on the other end. I used a number of pvc bushings cut to telescope one in the other to mate the 1 1/4 bushing with the 3" toilet flange. The reason I did this was that I wanted to be able to adjust the stator for a nice even air gap and I wanted a good solid base. On my next machine this is all simplified. I have since replaced the plywood stator support with an 1/8" aluminum plate. On the right the coil winder.
Originally I had only a single magnet rotor but have added a second steel disc to complete the flux circuit. Stator wires are still askew while I play with different wiring setups. I had a high wind day and got the down wire tangled in the fast spinning blades which yanked on the old diodes and shorted them blowing out the rectifiers. I have replaced them with 3 bridge rectifiers secured to the stator mount.
Since the last changes it makes up to 15 watts in light winds, pretty much a trickle charger but it does charge for a good part of the day most days. With a little more wind it does 20 to 30 watts. Cut in is too low at somewhere around 100 RPM but I'm still experimenting. The goal of my next machine will be 20 to 50 watts in 8 to 12 MPH winds. What I lack in high winds I make up for in fairly common, steady light winds.
My battery box
And of course my solar panels.
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