alt.energy.homepower

"Ray King" wrote in message
news:$@bignews3....
> Steve,
> Car Alternators can be efficient but a major modification is needed first.
> The field is about 3 amps. 3 amps times 14 volts is 42 watts. You have
30-42
> watts to satisfy before you can push any current into a battery, so
replace
> the rotating field ( removing the brushes also ) and replacing the field
> with a donut magnet. You may not have quite as much current but you start
> off with a much more efficient generator.
>
> Ray

Do you have any sources for a donut maget that'll fit an alternator? I've
had no luck while searching for one.

>
>
>
> "SteveC" wrote in message
> news:47cc185e$0$4060$9a566e8b@...
> > if you could somehow power a car alternator to run, could you charge a
> > bank of batteries somehow? Like using solar power to power an electric
> > motor, which in turn, turns the alternator which charges up the
batteries?
> >
> > Time to hit the junkyard for a couple of cheap alternators for an
> > experiment!!
> >
>
>