How much amperage can an alternator support? no really...

[LL - NY]

This agrees with motor theory, up to a point where the curve will flatten,
due to internal resistance. Don't know if that is within the operating range
(by design) of the alternators. In many respects, it acts like a smaller
turbo, when the RPM gets too high, the internal resistance (actually
inductance) will cause very little gain of current flow with a massive
increase in heat. As Brett said, you'd really have to figure out what RPM
range you will be running in, and keep yourself out of the flattened range
of the current curve.

LL - NY

On 2/5/08, Brett Dikeman <quattro at frank.mercea.net> wrote:
>
> On Feb 5, 2008, at 7:25 PM, cody at 5000tq.com wrote:
>
> > Changing the
> > pulley ratio to spin the alternator slower will move it most efficient
> > RPM range up to more like where your engine is usually running at
>
> Every alternator output graph I've ever seen shows increasing current
> output as RPM increases, not the other way around.  The curve roughly
> looks logarithmic, but provided you don't overheat the alternator, you
> still get more juice as speed increases.
>
> Brett
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