Core loss when there are two simultaneous fields

[naserhashemni]

Dear all, Hi
I am involved in a project and I want to model an induction machine with two three phase stators. The frequency and number of poles of the two set are different.
How can I write a formula for the core loss of the stator?
There are two sinusoidal waveforms at stator. Can I use superposition?
We know the core is NOT linear as there is saturation when we have core loss.
Could you please let me know what the relation of hyeteresis loss will be when there are two simultaneous fields?
Thanks a lot in advance
Hashemnia

 

[anorlunda]

If it is nonlinear you can not use superposition.

Your question implies that you have the core current waveform. If so, you'll have to sample the data, do an instantaneous calculation using a piecewise linear representation of the saturation curve, then repeat for each sample and sum them up.