Scicos Electrical Toolbox and Linear toolbox

[Shriram Sampat]

Hello everybody,

I am using scicos anew for the past couple of days, for a current 
regulation project.

The project goal is to make a PID controller (along with some other 
things) in a microcontroller to control the current flowing a circuit 
with the help of mosfets. The microcontroller reads in current of 
circuit via a sensor and controls the current to a set point using a DAC 
to regulate the gate source voltage of the MOSFET.

I want to simulate this whole thing, so that everytime my circuit 
parameters (inductance, resistance, MOSFET and input current) changes, I 
can recalculate the PID constants using the simulation. And also I can 
check out whether my circuit could handle the current regulation in the 
required frequency. The current controlled is in the order of 100s of 
amperes, so physically trying out the PID constants from scratch is a 
little dangerous sometimes and also time consuming.

I have the circuit simulated. But i just found out that i could not 
connect the output of the PID controller model (from linear toolbox) 
directly to the gate of the mosfet as they both are different type of 
I/O's (explicit and implicit). I can make it via the variable resistance 
which accepts position control from scicos blocks. But is there any 
other way to interconnect electrical (modellica based) blocks to normal 
scicos blocks ? I am a novice to scicos and scilab.

Hope i made my explanation clear.

Any pointers will be greatly appreciated.

Thanks a lot.

Ram

-- 
------------------------------------------------------------
Shriram R Sampat
Software Engineer - Embedded Systems

  EK Tronic Ing. R. Nitz        
  Tel.: + 49/(0)7154/8311-12
  FAX : + 49/(0)7154/70449
  email: s.sampat at ektronic.de
  www.ektronic.de
------------------------------------------------------------
  EK Tronic  Ing. R.Nitz       
  Enzstr. 9 , 70806 Kornwestheim
  Ust ID:  DE 146160631
  Geschäftsführung: Ing. Richard Nitz