Ferrite materials also have a complex permittivity, that effects the capacity of the wire that traverses the ferrite, so it can be capacitive like any other inductor, even if the wires is just a straight wire. The models used are empirical fits in any case.
@@sambenyaakov I can’t speak for manufacturers, because they aren’t that transparent, but I’ve approach this with data fitting for my own simulations when the details matter.
Hi Professor Yaakov, Can you elaborate on the Steinmetz equations for modeling core energy/power loss, in relation to OEM data? In other-words, how can Steinmetz equations characterize or estimate these effects? Always enjoy your topics and explanations!
Hello Professor, many thanks for your great presentation. Are there any good programs/algorithms to fit the measured data to such a circuit as shown with the simple model or the precise model (see 15:19)? Thank you for every comment!
Thank you for giving us this detailed examination of inductive parameters associated with magnetic materials. Could you possibly give us a video of how we might apply this data to a 'real world' example? This could be a problem of minimising interference or other - but it would be good to see how we might use the data to solve a problem rather than just use the 'suck it and see' approach which I could be guilty of in the past.
The use of complex permeability + Z (f) is probably why the analysis of the behavior of the ferrite equiv circuit differs from the manufacturer's simplified equiv circuit, which becomes INADEQUATE : for f>1 Ghz as shown in 15:38 and 17:59
What is the physical source for the imaginary permeability in the ferrite? I thought it was due to the hysteresis of the material, but am not certain if that is even an effect at these high frequencies.
I'm also interested what the Prof. will answer but I think it's a combination of the hysteresis as well as of induction of eddy currents in the ferrite material at higher frequencies. However I don't understand why us'' is then dropping at even higher frequencies. Inductors are still a bit of a riddle to me, I started looking at them just a few weeks ago.
Sir i have checked your website,it contains notes in Hebrew are there any English versions of your notes? It would have beena very great resource if sute is udated sir And any textbooks you refer to me as a student to learn basics sir??
I am sorry, the Hebrew videos are live recording of university lectures. No English version is available. Look up my RU-vid channel, many videos are bits and pieces of these lecture recordings. Good luck with your studies.
