Hey guys,
I have a 8' wind genny, built exactly using Hugh's axial flux design (two rotors). The output is 12V and the rated power is 500 W (if I remember correctly), although on average I get 10-15 Amps, I have seen peaks of 35 Amps.
I want to have the possibility to brake it in case of high winds or battery overcharging, without having to watch and wait for complete stop before shorting it.
From what I understood from various sources, directly shorting the generator is not the best idea. I would like to brake the generator using resistors to lower the stress on the whole thing, but I seriously don't know what values would be necessary. I found an interesting 3- position switch which could be used to reduce the speed by steps...
The generator is connected to the power room with a 200' AWG #6 wire.
What values of resistors would be appropriate to brake this mill without too much electrical and mechanical stress?
Thanks,
Vincent