the Outfit

Rectifiers are needed to change the alternating current that the axial flux alternator puts out

I borrowed the images below from our friends at www.otherpower.com

Pictured above is the schematic of the system. You need 3 rectifiers and they should be rated for the full current you expect from the wind turbine. In reality, each rectifier must handle about 2/3 of the total current but if you rate them for at least (preferably a bit more) the full current that your wind turbine will ever produce then you have a bit of a safety factor. For this 10’ diameter machine figure maximum output to be around 1200 watts. At 48 Volts that would be about 30 amps so you can use 3 35 amp bridge rectifiers safely. At lower voltages you’ll need heavier rectifiers – or – you can wire up multiple rectifiers in parallel. The schematic above shows it fairly clearly. Each line from the wind turbine will connect to both AC leads of it’s own bridge rectifier. The DC leads of the three rectifiers are in parallel and can wire to the battery. The schematic also shows a ‘kill switch’ and sometimes the rectifier block is a nice place to mount this. A DPST switch will serve to stop the wind turbine – to do this you need to wire it up such that it will short all three of the AC leads together when the switch is closed, and leave them all open when the switch is open.

continued at otherpower.com