[scilab-Users] Re: [scicos] Re: [scilab-Users] scicos mosfet gate voltage

[Bruno Chaumontet]

hi,
for my opinion and my very small experience in sicos
in a such case I share the problem in 2 parts :
- electronic part, I simulate it with pspice and then I define a black box
- physical process (including black box) simulated with sicos, very good

I'm not sure it's the good manner to mix electronic and pysical
process in simulation

in any case thanks a lot to sicos team, very powerfull

bruno

2008/1/24, Masoud-NAJAFI <masoud.najafi at inria.fr>:
> Sylvestre Ledru a écrit :
> > Hello Ram,
> >
> > If you don't get an answer from this mailing list, you can try
> > scicos at inria.fr
> >
> > Sylvestre
> >
> > Le jeudi 24 janvier 2008 à 09:45 +0100, Shriram Sampat a écrit :
> >
> >> hello guys,
> >>
> >> yesterday i sent an email regarding my project and reqmt to connect
> >> electrical and linear blocks.
> >>
> >> I want to control the gate voltage of a MOSFET(scicos electrical block)
> >> with the output of a linear PID controller blocks. If i try to connect,
> >> i now get an error message "port at origin has type 1 and port at end
> >> has type 2".
> >>
> >> Can anyone help me in this ?
> >>
> >> Thanks
> >>
> >> Ram
>
> Hi Ram,
>
> Electrical blocks are considered as components (or implicit blocks in
> contrast with explicit Scicos blocks), so their ports act as real
> electrical ports, i.e., their do not have predefined directions.
>
> These block are wirtten with the Modelica language, for example the
> model the electrical pin is:
>
> connector Pin
>         Real v;
>         flow Real i;
> end Pin;
>
> and the model of an electrical resistor  is
>
> model Resistor
>         Pin p, n;
>         parameter Real R "Resistance";
> equation
>         R*p.i = p.v - n.v;
>         0=p.i +n.i;
> end Resistor;
>
> Note that unlike ordinary programming languages, there is no causality
> between variables.
>
> Now, lets return to your question. In order to control the gate voltage
> of a Mosfet by a PID, the PID output signal should be first transformed
> into an electrical signal. You can do this using the CVS ( Controlled
> Voltage Source) block in the Electrical palette. Then connect the "-"
> pin of CVS to the Ground and "+" pin to the gate of the Mosfet.
>
> I wish it can help.
> Masoud
>
> ps: you can find some documentation about Modelica at
> http://www.scicos.org/scicosmodelicaref.html
> www.modelica.org
>
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-- 
Bruno Chaumontet
http://bruno.chaumontet.net
bruno at chaumontet.net