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Please don't be discouraged, Alexander. A good number of us recognise your expertise and willingness to help. Unfortunately, many users often don't know where to look for help. (I'm being a little

Yes, it was a missing closing parenthesis. Puzzling that PC would not complain by Mac OS would. Thank you all for helping. Roman

You would probably find the work by Alan Payne interesting. Add "ferrite" and google [email protected]> wrote:

Please don't be discouraged by these repeated appeals for help, Alexander. New members do not know where to search for advice, and some members hope to avoid searching by asking for advice here. That

I have repeatedly shown how it is quite simple to model transformers with cores with hysteresis loops. I posted the models on LTwiki. ?I have many examples of circuit calculation. It surprises me

I understand that, but you must first convince yourself that you have a method which can gather the data you seek. THEN, it will be time to see if LTspice is up to the task. You're putting the cart

You might also be interested in a book on Inductors by Marcos Alonso. He uses a combination of Python and LTspice to do the modeling. Amazon.com: Inductors: Variable and Controllable: 9798500248169:

You could always read the Help PDF that you already uploaded to Files. ? -- Regards, Tony

Yes, I found the wiki Thanks to Jim.

I really should get a printer and print this help file out along with a cheat sheet.? Thank you Tony.

You can't just sweep C or L values with time without considering the rules of conservation of energy/charge. There are ways of sweeping some component values with time, but they general involve

I wouldn't bother asking the AIs, just yet. They have a habit of completely misunderstanding SPICE syntax. I've never found them helpful. You might consider looking the LTwiki. There is a chapter

Thanks Jim, that's what I need I believe.

Bah, I settled on a .step function for the inductor. I am used to programming and it would be nice to sweep component values with time. It would be a cleaner screen to view.

The help DOES tell. Look for Chan Model; that will get you close. Jim Wagner

That DOES NOT work, just like it does not work for caps. Jim Wagner

You run into the same issue as time varying capacitance; you cannot just change inductance with time. How to handle it is in Help, though very obscure. I thought that I had seen it in an older

To clarify I use equation L(t) = L_start + (L_end - L_start) * (t / T). L=inductance L_start=start inductance L_end=end inductance t=sim time T=sim time length

I've tried to sweep inductance in my sim. I give value for inductor {Lsweep} and put directive .param Lsweep (1u+(200u-1u)*({time}/1m)) on the schematic, but it don't work?

Thanks guys. So, how can I start to simulate cores in LTspice? Is there a way or should I not bother?