I have to run a simulation soon with a saturated inductor and I was wondering how to do it. You answered that for me. Thank you.
@sambenyaakov
Жыл бұрын
😊
@joenova7945
Жыл бұрын
I didn't know how to do it either, thanks
@vicentematricardi3596
Жыл бұрын
Mis Saludos y como siempre , agradecido por sus excelentes enseñanzas !!!!
@sambenyaakov
Жыл бұрын
Gracias
@byronwatkins2565
Жыл бұрын
A very clever strategy!
@sambenyaakov
Жыл бұрын
Thanks
@idk2412
Жыл бұрын
Nicely presented, you make this very accessible! Though, I'm curious what are some drawbacks or assumption that are inherent using this method?
@sambenyaakov
Жыл бұрын
Thanks. Deficiencies: no hysteresis, and hence losses effects, the approximate nature of the fitting, not taking into account secondary effects (fringing, copper losses etc.)
@tseckwr3783
Жыл бұрын
thanks again for another very helpful video
@sambenyaakov
Жыл бұрын
Thanks
@Chupacabras222
Жыл бұрын
Fascinating!
@sambenyaakov
Жыл бұрын
Thanks. Feedback like yours keep me going.
@billimew7496
Жыл бұрын
Another spectacular video from Prof Sam. I wish you a good health and blessing. I have one question. lets say the current through inductor is ac. sufficiently high to reduce the permeability. does the inductance of an inductor changes with current. just for simplicity i assume the relation of L=(100-I) uH. I provide a sine current of peak current of 50 A to this inductor. Will i get 100-mod(50A sin(omega*t)) uH inductance.
@sambenyaakov
Жыл бұрын
Hi, indeed the inductance will change but you need to sort out to which inductance you are referring. See: Ben-Yaakov, Sam; Semidotskih, Yivgeni; Rozanov, Evgeny; Haag, Hemann; Hämmerle, Florian (2021). ‘Inductance’ definitions, modeling, and simulation. TechRxiv. Preprint. doi.org/10.36227/techrxiv.14975082.v1
@wickedprotos1937
Жыл бұрын
Thank you!!!!
@sambenyaakov
Жыл бұрын
Thanks.
@power-max
Жыл бұрын
I've been wondering exactly about this for some time! Since I wanted to simulate circuits like Royer oscillator and joule thief's and such circuits myself for some time! Thank you! Question: throughout your video, is 'n' the number of turns on the primary? A is the cross-sectional area of a core? I is the current? l is the length of the core? (damn why upper case I and lower case l must look the same smh) Is the assumption that the majority of the flux is constrained within the core? I have a hard time learning about magnetics because of all the different variables involved and keeping track of what is what.
@sambenyaakov
Жыл бұрын
Thanks. You got all the definitions and these assumptions correct. Also, no core or copper losses and some other simplifying assumption. The model is meant for seeing first order effects. If you run a Royer oscillator, show us the details. Great nonlinear circuit.
@wickedprotos1937
Жыл бұрын
lol on the i and l issue, in my first transforms class: I'm a very sloppy left hander, so my 5 and s(s output variable from a Laplace transform) look the same especially when I get tired. So my professors were cool and let me just underline my 's' and they knew this for me.
@sambenyaakov
Жыл бұрын
@@wickedprotos1937 👍
@RogueTuning
Жыл бұрын
In your video 'answer to inductor saturation riddle', the derivative of the inductance in saturation is >0. Would the arctangent function better approximate this behavior instead of hyperbolic tangent?
@sambenyaakov
Жыл бұрын
They are both approximate, about the same. For better fitting use Table
@isacdaimary9908
Жыл бұрын
Sir what is the use of "Group delay" parameter in Bode plot in LTspice. Can I use it to find phase margin?
@sambenyaakov
Жыл бұрын
Phase delay is a time domain parameter. Nothing to do with phase margin which is a frequency domain parameter.
@h7qvi
Жыл бұрын
Modelling hysteresis would be interesting
@sambenyaakov
Жыл бұрын
In the making
@justpaulo
Жыл бұрын
Great content as usual. It would have been interesting to plot the voltage across L1. Presumably, if spice works well, it should match perfectly V(Ld) since i(t) = t and therefore di/dt=1 => V(L1) = L1*di/dt = L1 . I guess I'll have to get my hands "dirty" and build such a simulation.... 😉
@sambenyaakov
Жыл бұрын
If you do, please share.
@justpaulo
Жыл бұрын
@@sambenyaakov Just did it, and V(L1) exactly matches V(Ld) as expected.
@sambenyaakov
Жыл бұрын
@@justpaulo Great
@PavolFilek
Жыл бұрын
Hi prof. S: Ben-Yaakov, tell me, how to transfer all your knowledge to my brain ?
@sambenyaakov
Жыл бұрын
Thanks. How about transferring some?😊Keep watching the videos. More to come .
@paulpaulzadeh6172
Жыл бұрын
Cloud you please make LT spice modell for Helmholtz Coils too, I use it as notch filter
@sambenyaakov
Жыл бұрын
do you mean an electrical model of the impedance ? Is this for audio applications?
@paulpaulzadeh6172
Жыл бұрын
@@sambenyaakovyes , I use as filter for negative rail and positive rail voltage that it connected to the same transformer with two separate secondary output and separate rectifier for each and a coupled + /- on each rectifier to make zero reference for push pull output stage. Each coil then will be placed together to make notch filter , we can get very good ripple steering which I saw on one your video. In practice works well about 30dB attenuation by tuning in these two coils. I got the idea from ripple steering and this Helmholtz coil applications. But still now I can't make LTspice modell for it. Maybe you can help me Thanks a lot .
@sambenyaakov
Жыл бұрын
@@paulpaulzadeh6172 Hi, as I know Helmholtz Coils are two circular coils put a part to generate a controlled magnetic flux. Is this what you are using???
@paulpaulzadeh6172
Жыл бұрын
@@sambenyaakovyes , the ripple for positive and negative, cancel each other , As two coil tune in each other
@sambenyaakov
Жыл бұрын
@@paulpaulzadeh6172 Is there any published reference on that?
@avin6602
Жыл бұрын
Thanks! What about hysteresis, can it be introduced into the simulation?
@sambenyaakov
Жыл бұрын
Thanks. Lt spice inductor model has a variant which include the hysteresis.
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