Wind Generator

What does a fish know about the water in which it swims all its life?

Earth Day was Last Week, So I decided to Do a little something. I had bought a bunch of Solar of Solar cells that arrived on the day after Earth Day 2008. The solar cells are going to be another project all together, as I am thinking of a way to mount them and water proof them.

Anyway, I wanted to make a wind generator. We dont exactly get a lot of wind, but we do get breezes and such around 10 to 15 mph. Ive decided to go with a single phase generator since Its the first time Im doing this and I dont want to over complicate things.

The generator itself with be made from wire I got from a microwave oven transformer and the magnets Ive collected from taking them apart. Simple, yet Im putting Old Microwaves people threw out to good use.

Heres what Ive found so far:

  • Turns Matter. The more turns the greater the induced Current/Voltage
  • Area Matters. The more area Over the magnetic field the greater the induced voltage/current. However, I am uncertain if a bigger wire gauge will also give the same with less turns (I suspect Yes, because larger Wire Sizes have a lower ohms per foot)
  • Shape Does NOT matter. As long as it covers the most area and penetrates the magnetic field the shape will not matter
  • Speed Does Matter. The higher the RPMs the greater the Induced voltage/Current.
  • Permeability matters. Stick a Piece of iron in that coil! 

Currently, with a 200T (+/-10T) Coil, I am getting 1.5V Out @100mA :). Early Prototypes have gotten .5v @.5mA out. This testing was done at 600 RPM, as slow as the drill press can go. 

Since I am going with single phase, I am going to use 4 Magnets,  which means I have to use 4 Coils. To get anything Useful out, I am going to need 12V, or 3V Per Coil. So, To get that output, I should have to double my turns from 200T to 400T. Woo! A whole 2.4W Then. Current will probably be limited because of internal resistance.

I am thinking of doing a bunch of 200T Coil in between the main 4 and then hooking them up all in series, this should eliminate dead spots and still produce single phase power.

Stay tuned