Re: gEDA-user: Non-linear spice models for power sources operating near stall

[Armin Faltl <armin.faltl@xxxxxx>]

Mike Crowe wrote:
> >    3. More complicated models would vary the inductance depending on
> >    rotation speed, electrical frequency and possibly angular position of
> >    the rotor...  but hopefully you don't have to go that far.
> >    All in all...   I think Spice will be a pretty awkward tool to do any
> >    more than (1.).  I'd look at something like University of South
> >    Carolina's VTB (Virtual Test Bed).  It's free, but closed source.
> >     
> Unfortunately, I believe that the model will be more like #3.  The power
> source is a periodic hydraulic one.  My ultimate task is to deliver peak
> power from the mechanical system regardless of the available input power
> (wave action).  In addition to modeling the motor, I will need to model
> the mechanical components.    I looked briefly at the SC site, but it
> requires a plug-in that I don't have.  
>   
How about setting up the differential equations of your dynamic model. 
If you can formulate
them as a system of ordinary explicit de's and as initial value problem, 
you can use a
Runge-Kutta method, that should be readily available as C-source (or at 
least FORTRAN).



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