I'm trying to model an audio transformer for core saturation simulation but I don't understand what N parameter represents in the Chan model. It should be the number of turns of the windings but if I set it in the model I don't have what I expect from simulation. I see what I expect only if N is equal to one.
Could anyone explain me what N parameter exactly represent?
In the picture below you can see my transformer model.
Thanks a lot
Best Answer
N
is part of the Chan core parameters (along withBr, Bs, Hc, A, Lm, Lg
) and it means the number of turns. In this configuration (the one you're showing) it's part of the magnetizing inductance. This is used as a one turn inductor with all the parameters of the Chan core, so that the combination of VCVSs/CCCSs that make up the windings can use the full number of turns.In case my words are fuzzy, think of it like this: you can have a one turn magnetizing inductance and then model the windings, each with its own number of turns, or you can have a magnetizing inductance with a certain number of turns and then model the windings with percentages of those number of turns.
E.g.: for
Np=100, Ns=25
you can have:Nmag=1, Np=100, Ns=25
Nmag=100, Np=1, Ns=0.25
You can also use
Nmag=10, Np=10, Ns=2.5
, or any other numbers that satisfy the ratio, but it would just look confusing. For the same reason,Nmag=1
is used, to let bothNp
andNs
be meaningful to what they represent.