Transformer Mathmatical Modelling

AI Thread Summary
The discussion centers on mathematical modeling of transformers, specifically using MATLAB for analysis. Key equations for modeling include Vp-ip*Rp-Lp*(dip/dt)-Rc*ic = 0 and Vp-Lm*(dim/dt) = 0. Participants debate the combination of primary and secondary reactances (Xp and Xs), with some asserting they can be combined under certain load conditions while others disagree. The conversation also touches on simplifying assumptions for no-load and full-load conditions, noting that certain parameters can be ignored in these scenarios. The goal is to derive the secondary voltage and flux relationships, with a specific interest in the equation Vs=(Ns/Np)*Ep.
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I would like to do the mathmatical modelling then apply it in matlab. This is my trailier.

Vp-ip*Rp-Lp*(dip/dt)-Rc*ic = 0 ----- 1
Vp-Lm*(dim/dt) = 0 ------2
i need the modelling of the secondary voltage to the primary and the flux

Vs= ?
flux= ?

I did apply it in MATLAB but didn't work.
 
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I know nothing about mathlab. But from a transformer analysis point of view:
Xp and Xs should be combined.
Do modeling at no load and also at full load.
At no load Xp, Xs, Rp and Rs can be ignored.
At full load Rc and Xm can be ignored

Above simplification can be used for normal transformers. There are some extremely rare exceptions where the preceding is not true.

Some transformers engineers say Xp and Xs can not be combined. I am in the group that say they can be combined.
 
brilliant-12 said:
I would like to do the mathmatical modelling then apply it in matlab. This is my trailier.

Vp-ip*Rp-Lp*(dip/dt)-Rc*ic = 0 ----- 1
okay
Vp-Lm*(dim/dt) = 0 ------2
That can't possibly be right.
i need the modelling of the secondary voltage to the primary and the flux
Vs= ?
Vs=(Ns/Np)*Ep
 

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