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< homemade wind generator

Discussion in 'Electronic Basics' started by LivingOfftheGrid, Jul 4, 2007.

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  1. sparky

    sparky Guest

  2. Tom Biasi

    Tom Biasi Guest

  3. Aly

    Aly Guest

  4. So you go to libraries and dig out books from thirty or so years ago
    on "alternative energy". Or you go to used book sales and look for
    them there. I cam across one just last month at such a sale.

    The classic is taking an oil drum, cutting it in half, and using that
    as a Savonius rotor. Then you get an alternator from a car, and there's
    your actual generator. The axle sticks up into the air, where the halves
    of the oil drum collect the wind and turn the alternator.

    I don't have a clue how well they worked, but they were all over the place
    in the books thirty to thirty-five years ago.

  5. Tom Biasi

    Tom Biasi Guest

    Maybe the Mother Earth people from the sixties are just waking up now.
  6. Aly

    Aly Guest

    Ahhh, I remember reading about these. :)

    After university, you know those years when you fiddle about back home at
    your parents for 12-months, I played with some of these things.

    One of the biggest hurdles is the sheer power of the wind. I made mmmmmmm.
    Having trouble finding anything on line these days... All commercial carp.

    Anyway, the thing just fell to pieces in the wind. I used 1cm threaded rods
    to hold the paddles as it were to the rotating axle. The result was a
    tangled mess. It's certainly not as easy as it sounds.

    The trouble with the car alternator is that it needs to be spun sufficiantly
    fast to generate energy, and the coil also needs to be energised. A
    rotating propeller needs to be stepped up to about 1000 revs+ certainly via
    a chain/gear assembly. That's assuming there is sufficiant wind to get it

    From what I remember the savonius rotors work in very low wind speeds and
    also generate alot of torque. I wish I could find this example.

    Darrieus turbine!!!!!!!!!! :)

    That's pretty much what I tried to build. :)
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