Drill machine motor as generator ?

[Onthero]

Hello ppl,

i have been reading and learning for some months now,

and build a 1.4 meter (=4.5 foot) 3 blade prop from a huge plastic trashcan.

Nothing calculated, just did what looked good.

It freewheels pretty allright i think, now i'm looking for a good alternator to let an ordinairy light bulb burn. I cant find/make a PMA any moment now, so i think output will be limited to ~15W at an average wind speed of 7/8 m/s with a good brush generator like a car alt, wich will probably to heavy ?.  

Therefore i was thinking about a 500W AC brush motor from a drilling machine, will this work, and will it be good(not to big/to small) as generator for this little prop ?

I have 600W 2 phase induction motor here to, but thats not an option at all, as i have read, it needs >3000rpm to output any power.

(All motors above where built for 230V, 50hz).

So ... any advice would be welcome !

(This is only an experiment to learn/practice the basics)

[ghurd]

I am not completely clear on those motors.

I doubt the 500W AC drilling motor is a brushed type.  If it is a universal AC/DC motor, it is useless.  I can't imagine why a drilling machine would use that type of motor.

Best bet would be to look for a PM (or PM field) DC motor, with low RPMs.  Not gear motors.  

Sounds like a low speed prop, 48V or more would have the best chance.

Might come up with a 90 or 180V PM DC motor to get started.

Might Google Search the Board (top right) for AC servo motor.

http://www.otherpower.com/otherpower_wind_alternators.html

G-

[cutlass1972]

not to hijack this fellows thread but what about a cordless drill motor? I have a couple of them laying around that the batteries died and it was cheaper to just buy a new drill. It would be nice to use one for something.

[ghurd]

A couple people tried that ('coldspot'?).  It sort of worked.

They have plastic gears which will fail very quickly.

If the gears are removed, the motor needs to be spun too fast to get usable voltage.

G-