10 foot wind turbine, 40' tower, Midnite Classic.

Описание: This is a little 10' diameter turbine that a student built that's crudely installed at my shop on a 40' tower. The alternator is about exactly what we describe in our book 'Homebrew Windpower' ~ Axial Flux design with two magnet rotors 12" diameter. 12 magnets per rotor are 2" diameter x 1/2" thick NdFeB N42 grade. 9 coils in the stator are wound with 130 turns of AWG 15 wire, for 3 phase output ~ wired in Star (WYE).
The turbine's alternator is designed for a 48V battery, hitting about 50VDC (after the rectifier) at 140rpm, but we're charging a 24V battery with it, through a Midnite Classic MPPT controller in Windtrack mode. I know the power curve could use some tweaking (they always can) ~ but it's behaving nicely and running pretty efficiently.
During this video we were having winds around 13mph give or take... it's a bit gusty around here and the turbine is short. While I do have an anemometer on the tower, i'd like a better one that gives constant readings. The one on there just gives a snapshot every 10 seconds or so... and it wasn't expensive, so my data is a bit rough. I've only seen wind on this machine a couple times since we put it up. It seems to want to start furling around 700W, which is good... and it's happy to produce that sustained. In the past I've seen peaks upwards of 1800 Watts. Again though ~ I've not got much time living with this turbine. I'll share more after time, I'm sure I'll make changes to the system and the power curve.
I also have a couple other small turbines to test on this tower!