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Curtis L. Olson schrieb:
> I need to do some work beefing up our electrical system model a bit. 
> I'd like to add a simple model for a battery where output varies with
> time and a simple alternator model where output varies with rpm.  I'm a
> complete moron when it comes to electrical stuff so I'm not even sure
> I'm asking a sensable question.  Does anyone know of a good online
> reference(s) or even just send me some reasonable info.  In the end I'd
> like to be able to be able to output bus voltage (downstream of the
> battery + alternator) and also model an ammeter.
> 
> I already have a way to "back propogate" the total current draw on the
> system, where the individual electrical system outputs can be marked
> with some current draw when they are on, however, I need to work on the
> input side of the equation.
> 
> Again, I want to start pretty simple and not get drug down with too
> fancy of an implimentation.

All you need is Kirchhoff's law (e.g.:
http://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws)

If you can live with a stationary current (i.e. no dynamic effects) it
boils down to solving simple linear equations (Ax = b).

If you need dynamic behaviour (what I doubt) you'll get partial equations...

CU,
Christian
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