alt.energy.renewable

"Steve Spence" wrote in message
news:46d56655$1_4@ ...

> "MooseFET" wrote in message
> news: @ ...

>> On Aug 28, 4:24 am, The Real Andy wrote:
>> [....]
>>> The problem it that car alternators do not have magnets.

>> Any alternator that has been installed and used on a car will "build
>> up" if you wire it up and give it a spin. There is enough
>> magnetization left to overcome the rectifier's forward drop.

> Not without the field coils energized. I saw a circuit once for self
> energizing the coils. It's still a parasitic load.

Perhaps give the field a split second jolt from a battery, when an rpm sensor
indicates adequate speed. Use a diode, resistor, capacitor to have the output
latch it into operation. The generator would engage and drop out
automatically. Crude functioning circuitry would be cake, with lots of room to
expand sophistication.