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

[Mike Crowe <mcrowe@xxxxxxxxxxxxxxxxxx>]

Turned out that the mechanical coupling coefffient is so low that a
stall cannot occur.  So Matthew W.'s #1 approach will work for me.  

Thanks everyone for the help!
Mike

On Wed, 2010-06-02 at 20:13 +0200, Armin Faltl wrote:
> 
> 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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