How to model power electronics converter in Xcos?

Specific domains Xcos
1

I would like to simulate a power electronic converter in Scilab/Xcos. The converter consists of several elements of below given type i.e. the IGBT with an antiparallel diode

Switch
Switch372×312 4.62 KB

My intention is to simulate this element in an abstract manner. It means simulate the transistor as an ideal switch i.e. circuit element with below given features

  • zero resistance in the on state
  • infinite resistance in the off state
  • ability to transfer current only in one direction
  • instant transition between the on and off state based on the control signal

Simulate the diode as an ideal valve i.e. circuit element with below given features

  • zero resistance in the on state
  • inifinite resistance in the off state
  • ability to transfer current in one direction
  • transition into the on state based on voltage between anode and cathode
    and transition into the off state based on zero current

May I ask you for an advice what is the most suitable way how to model this element in Scilab/Xcos?

2

Hello,

Did you have a look to the “Electrical” palette in Xcos ? I think that both (Modelica) components are available there.

S.

3

Hello,
thank you very much for your reaction. Yes, the “Electrical” palette contains several types of the transistors and some diode also. The problem is that the elements require a buch of parameters. I am not able to specify those parameters. I would like to abstract the power electronics circuit from some specific devices and I would like to analyze the raw dynamic of the circuit.

4

What do yo mean by

? If abstracting means using equations, you will also need parameters, don’t you think ?

S.

5

Yes, but in the first approximation only the parameters of the passive elements (inductors, capacitors) not the transistors and diodes.

6

Is it a homework/assignment ?

S.

7

No, it isn’t. It’s part of my self study of the power electronics and the electrical drives.

8

In that case your problem is not Scilab specific but rather a modeling issue. Considering the features you expect for your ideal components, everything should be doable with switches and other kinds of blocks handling events.

S.