saturable core modelling in PSpice

[Adam M]

Hi folks,

I'm trying to create a model of a practical 3-winding transformer - by using
an ideal transformer and adding discrete components to model the losses etc.

I want to create a saturable-core inductor to place accross the terminals of
the primary of the ideal transformer to model the B-H curve.

I've read a bit about how to do this, but everything seems to be aimed at
"SPICE 3", and I'm using PSpice in windows. (I'm a novice!)

What should I do? Does anyone know of downloadable saturable-core inductor
models? Or somewhere else I should go for a tutorial on this?

Thanks in advance!

Adam.

 

[Eur Ing John Rye]

Hello Adam

Hi folks,

I'm trying to create a model of a practical 3-winding transformer - by
using an ideal transformer and adding discrete components to model the
losses etc.

I want to create a saturable-core inductor to place accross the terminals
of the primary of the ideal transformer to model the B-H curve.

I've read a bit about how to do this, but everything seems to be aimed at
"SPICE 3", and I'm using PSpice in windows. (I'm a novice!)

What should I do? Does anyone know of downloadable saturable-core inductor
models? Or somewhere else I should go for a tutorial on this?

If you are a novice, you are taking on a real challenge. I have done some
modelling of iron core devices using Spice 3, and I did not think PSpice is
that different. One approach that I have used successfully for some purposes
is to model the hysteresis loop as two inductors and to switch between the
unsaturated inductance, and the saturated inductance using switches
controlled from a circuit calculating the value of the flux. Applying this to
a 3 winding transformer would be quite interesting.

John