Pma Alternator
Friday, March 26th, 2010 |
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Permanent Magnet Alternator - self POC failing?
I have a very simple PMA concept. I take a flat plate (plastic), drill a hole through the center and hot glue 4 magnents onto the plate. Each magnent is alternating in current (meaning if you for every positive the two closest magnents are negative). Each magnent is about 2 inches long with a 1 inch gap. I place the plate on a fan axle, screw it in place, and turn said fan on. Now I take a copper wire (just your average copper wire that I stripped from an old fan) and coiled it about 70 times +/- 1 turn (also tried different windings) with a seperation of 1.25 inches meaning that while the magnent passes one end of the coil on a positive the other end of the coil will be meeting a negative. I then take the inner and outer leads and place them on a voltmeter. I then place the stationary winding at distances ranging from 1 mm to 4 inches away from the magnents as they turn. I am unable to produce any voltage (yes I have tested the volt meter). I have altered the speed also. Whats wrong?
Coming out of the windings is AC not DC switch your meter to AC ,it will be ragged but it should be there. or connect a bridge rectifier and a small load resistor ,also a capacitor to smooth out the ripple.