hi friends.i have a permanent magnet motor rated at 90vdc continuous duty,130vdc peak,18.5amps,6750rpm 2poles.i wanted to build a 12v wind gen with it but after testing in wind,i found that it give only 5 volts max.i guess that it should reach about 800rpm to reach cut in.i was thinking of gearing it but this will need longer blades and due to strong winds in my country,i think that it wont be advisable because the blades may break.so,i was thinking to replace the ceramic magnet by hard drive magnets.then i assume that the output will be much more higher without gearing.i got this idea from a guy who did an induction motor convertion by using hard drive magnets in the rotor.
is this idea advisable?
