I love your demonstrations of how material property models affect inductance (and earlier capacitance). It sure is easier than figuring it out alone.

@sambenyaakov

2 жыл бұрын

Thanks

The world's best teacher

@sambenyaakov

2 жыл бұрын

🙂🙏

Hi, Thank you so much for your valuable time to clarify my doubts and hope it helps everyone.

@sambenyaakov

2 жыл бұрын

👍🙏

@sambenyaakov

2 жыл бұрын

🙏🙂

👍🙏❤️

@sambenyaakov

2 жыл бұрын

👍🙏🙂

Thank you.

@sambenyaakov

2 жыл бұрын

Thanks

This is a very simple and clever procedure that is easy to follow. The key seems to be the fitting of H(B) and µ(H). Are the forms of the equations you are using to fit these curves always what you have shown in this example or do the forms of the fit equations vary with differing materials?

@sambenyaakov

2 жыл бұрын

The templates should be universal for ferrites..

Hello professor, for the equations you derived, are they overly optimistic or conservative? For instance, H(B) = 24.91 * tan(3.404*B). If I were to build an inductor using this equation and the rest of them, and measured the actual flux density at a given field intensity, how accurate or far off would the flux density result be? Same goes with the rest of the equations. Thank you! I really appreciate all your videos and work

@sambenyaakov

Жыл бұрын

The fitting is fine. The problem is that the geometry makes a difference. This is where FEA comes in.

@idk2412

Жыл бұрын

@@sambenyaakov Can you explain your comment more? What does it mean the fitting is fine but the geometry makes the difference?

Hi Professor, Thank you for this helpful presentation. I have some questions that are closely related to this topic. This presentation is about the value of urev (relative magnetic permeability) and the inductance of a DC-biased inductor. But what happens with urev when an AC current with very low frequency, let's say 50Hz, flows through the inductor? Will urev (and with it the inductance) also change with the phase (instantaneous value) of the current? In a practical application: Let's say I'm using an inductor in an LC filter to filter noise above 30MHz. A current with sinusoidal form and 20Apeak-peak flows through the inductor. Will the cutoff frequency of the filter be different when the instantaneous current through the inductor equals 0A (phase = 0°, 180°C) than when the current equals 10A/-10A (phase = 90°, 270°)? Thanks

@sambenyaakov

2 жыл бұрын

Yes, indeed the LF current will have a similar effect. This is why line filters include common mode chokes in the coupled inductor configuration to zero the magnetization flux.

Is the Ae supposed to be in m^2? Seems to be the only way that I can duplicate your results.

@sambenyaakov

2 жыл бұрын

Yes, thank for pointing out the typo of heading. All are supposed to be SI units.

Did I get this right? That an offset signal in an inductor will change the inductance?

@sambenyaakov

2 жыл бұрын

Yes indeed.

@xDR1TeK

2 жыл бұрын

@@sambenyaakov is this related to core saturation and thus modulating relative permeability? I suspect simulation won't work for this. I guess I have to fire up my scope and try to make an Oscillator to tune by changing the drive current in the LC tank.

@sambenyaakov

2 жыл бұрын

@@xDR1TeK Indeed most simulators will not show this effect

Hi Professor, Is it possible to share the excel file?

@sambenyaakov

2 жыл бұрын

Please send me email address

@Yorumcu63

2 жыл бұрын

@@sambenyaakov Proffesor youtube not accept any mail adress in comments.Could you load any file share service your excel file(for example in Google drive) I had searched same subjects and your describtions amazing .Thank you

@sambenyaakov

2 жыл бұрын

@@Yorumcu63 Try this www.dropbox.com/scl/fi/i9asozuqp3xhfi7hkfyb3/Ld-Idc-_3.xlsx?dl=0&rlkey=xi32mzv19yff5059qxgjdxx9y

@Yorumcu63

2 жыл бұрын

@@sambenyaakov Thank you profesor.I was downloaded and working