Some common home-brew wind turbine specs:
Cut in: 140 RPM
Furling: 650 RPM
So what is it generating at 30 RPM - 120 RPM, nothing.
How about in wind that would result in 700 RPM, nothing.
Wouldn't it be nice to broaden the RPM's of power collection?
What say we use 'variable resistance' in a 12 coil turbine.
1. In low wind speeds, under 140 RPMs, only 3 coils are 'loaded' - 'hooked up' - to a 6v olt cart battery. We now have low resistance and are producing power when before we were producing none.
2. At wind speeds that would produce 140 - 'X'(300?) rpms, we load 3 more coils into a 12 volt battery.
3. At wind speeds that would produce 300-600 rpms, we load 3 more coils into 24 volt bank.
4. At wind speed that would produce 650+ rpms, we load the last 3 coils into a 48 volt bank, producing power when we normally would be furled.
Now we are collecting power in winds that would have resulted in no power at 30-139 RPMs and also at 650+ RPMs.
Is the above the best way to do this? I don't know - just thinking outloud. But by using a logic controller to 'turn on/off' coils according to wind speed would allow a more flexible design resulting in power production over a much larger range of wind speeds.