Re: [Qucs-help] Problem (numeric? bug? mine?) with qucs and EDD

[Romano G. <ro...@de...>]

(Doing a reply-to-all as  customary on Linux lists. If that's not
expected here, please tell me).

On Mon, 2008-03-17 at 10:28 +0100, Bastien ROUCARIES wrote:
> >  http://www.dea.icai.upcomillas.es/romano/linux/qucs1/

> See joined file, check if value of C and L are negligible.
>

Thanks a lot. I see what you are doing, but all the L and C added change
completely the simulation. Now the M field does not correspond to the
real one, it should come back to zero at the end of the period. And if I
lower dumping values, it stops again.

> Use relaxTSR option of solver help also.
>
> Solver are based on assumption about local linearity.

Yes, but tanh() is a quite smooth function, should not create a lot of
problems, no?

> > 	But worst, try to change the I2 definition of the EDD to
> > I2=Ms/a*V1 (simulating a linear material): all is ok, and I have the
> > result in ok.jpg. But if I write it as I2=Ms*V1/a, then the simulation
> > is much slower and I have a bad result (see bad.jpg).

This one I find much more worrisome. 


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