LTspice tutorial - Simulating inductors - How hard can it be?

#52 #ltspice #inductor
In this LTspice tutorial I take a look at various ways of simulating inductors - from simple to accurate. But to start things of, I will highlight how much of an influence the parasitics of an inductor have on its behavior in an electrical circuit.
Variuous manufacturer spice libraries:
Samsung
www.samsungsem.com/global/supp...
Murata
www.murata.com/en-eu/tool/spi...
TDK
product.tdk.com/info/en/techn...
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Tutorial series
EP1-Getting started:
• LTSpice Tutorial - EP1...
EP2-AC simulation and the Baxandall tone control circuit:
• LTspice tutorial - EP2...
EP3-.param and .step directives:
• LTspice tutorial - EP3...
EP4-How to import libraries and component models: • LTspice tutorial - EP4...
Ep5- Stock example simulations to play with: • LTspice tutorial - Ep5...
Ep6- Basics of FFT analysis and .four statment: • LTspice tutorial - Ep6...
EP7- Dependent voltage and current sources
• LTspice tutorial - Ep7...
Ep8- Turning a datasheet into a component model
• LTspice tutorial - Ep8...
EP9- Independent voltage and current sources
• LTspice tutorial - Ep9...
Ep10- .wave statement and audio file processing
• LTspice tutorial - Ep1...
Ep11 The effect of temperature on your circuit
• LTspice tutorial - The...
EP12 Modeling a DC brushed motor
• LTSpice Tutorial - Mod...
Ep13- Worst Case, Monte Carlo and Gaussian statistics circuit analysis
• LTspice tutorial - Wor...
EP14 - Digital circuits and logic gates • LTspice tutorial - Dig...
EP15- SMPS EMI and electrical noise and filters
• LTspice tutorial - SMP...
EP16- Feedback loop simulation
• LTspice tutorial - Fee...
Ep17 - Verifying Simulation Models
• LTspice tutorial - Sim...
Ep18 - Simulating Capacitors
• LTspice tutorial - Sim...
Ep 19 - Simulating Inductors
• LTspice tutorial - Sim...
EP 20 - Noise simulations
• LTspice tutorial - Noi...
Ep21 - Models and Libraries
• LTspice Tutorial - Cre...
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[@kieranj67]

Thank you Fesz, another amazing educational video. I've seen the saturation current specs on inductors but never understood their actual affect - I do now after watching your video, thank you !

[@FesZElectronics]

I'm happy I could share some light on the topic! Usually you don't get to see this in practice, but it could be the cause of unexpected efficiency drop in SMPS's or filtration loss in circuits like filters where inductors are used close to this saturation limit.

[@honorbean2973]

Excellent video! You really do a great job explaining key concepts clearly and thoroughly.

[@johnanderson4638]

Super tutorial. Well considered and I like the tanh approx to flux saturation. Great work!

[@schwinn434]

Thanks again for a great video; As an aside: I tried to learn the languages of Spanish, and Italian (when I was younger, living in Italy, and later when I had Spanish friends in the USA) so, I do appreciate just how hard it is to speak another language; Every once in a while, Fesz (I think, this is your name) you miss-pronounce an English word, but as a whole you speak excellent English. Again, I do appreciate all your skills- especially, in knowing other languages; I also would even venture to guess your a polyglot - something, again, I greatly admire; I only speak one language (English), and I'm still (at age 55) trying to improving my English, especially, in writing form. Please, keep up the great work.

[@FesZElectronics]

Actually this was pointed out by other viewers and in the mean time I tried to pronounce it correctly. So in more recent videos you might notice that. Don't worry, I really appreciate when people point out things like this, I know my pronunciation is not perfect and I do try to make things better.

[@schwinn434]

@@FesZElectronics I should have know you would appreciate the constructive criticism; however, I changed my original comment (above, of course), so you might want to look at it. If you decide to remove your reply, I'll try to make sure I remove this reply, so your comment section here, remains comprehend-able. Take Care (PS: I do appreciate individuals that try to constantly improve - anyone can make a mistake, but not everyone tries to correct their mistakes. Actually, the people, IMHO, that don't make mistakes are the ones that don't do anything new, and worthwhile. Another (very big) aside: I've always admired the Japanese for their constant attempt in improving their manufacturing processes - which, I think is made evident in the quality of their manufactured products today.

[@JohnDuthie]

FESZ! Thanks for the video!

[@UmerKhan-xy1iz]

Bro killed it at "Like all good things in Life you don't really know how to get them" hahah

[@seshansesha7645]

Thank you

[@giorgiocanal1659]

I'm sorry for your oscilloscope probe. Thanks for the job done!

[@qzorn4440]

a fantastic LTspice presentation . For a LTspice beginner, is there information on the IL300 opto-isolator with separate input and output op amps isolated signals? Thank you.

[@FesZElectronics]

Hello! There seems to be some sort of model on the manufacturer website - Vishay; you can find it here: www.vishay.com/ppg?83622&designtools-ppg I didn't have time to try it out, let me know if it works.

[@BraulyoGaming]

so how can i see the voltage inside the inductor in LTspuce?

[@alpercimendag3047]

What is x? It is at the end of the video. Also, you have displayed inductor saturation at a very strict case of input supply. I've tried it with a buck converter which has a different input supply then whats shown here. Buck converter inductor does not saturate. I think ltspice still missing inductor saturation for a real circuit simulation.

[@lyriz]

Great video! But how did you calculate the parallel capacitance att 5:30 ?

[@FesZElectronics]

Well I considered the L and C as parallel components; their resonance frequency is F=1/(2*pi*sqrt(L*C)) and if you know L and F you calculate C=1/(4*Pi*Pi*L*f*f)

[@chungolio]

I did the calculations, but I didn't get 3pF for the parallel capacitor, I got almost 20pF... Those are the parameters I used: L = 10mH Fr = 350kHz

[@newtonsingh2188]

yes its 20.678pF@@chungolio

[@Chris_Grossman]

SPICE in general does not respond well to sharp transitions in which the second derivative in not continuous. That is why the tanh version works so much better than the table version. Simple version: smooth good, corners bad