Sspence writes – “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.” – Link.

Related:

• If you make a lot of these it might interfere with military radar? (check out the comments) – Link.
• Wind Powered Generator – With a motor and some piping, it’s suprisingly easy to build this inexpensive, efficient windmill generator. MAKE 05 – Page 90.