Power MOSFET drivers

[@TYGAMatt]

Possibly the best explanation on the planet. Brilliant. Thank you Sir.

[@sambenyaakov]

Thanks

[@AccidentalScience]

Best explanation I ever found so far on KZbin, and from elsewhere (including some webinars from semiconductor manufacturers). I'll recomment your video to everybody who'd like to know more on this topic, and on my own videos if it comes the chance. Thank you for posting, greetings from the Alps.

[@sambenyaakov]

Thanks. I appreciate it.

[@samshoushan2881]

Yes he is

[@Magneticitist]

This is the best mosfet explanation I've ever seen, much appreciated.

[@sambenyaakov]

Thanks😊

[@IsaacOLEG]

@@sambenyaakov Helllo, I appreciate also, I am following your explanations even if i am a "false beginner" (my true job is piano tuning and regulation/repairs). I think I grasp % may be, often going back until I have it, but my impressions is that it helps to shape my mind in regard of "what is a mosfet used for in the first stages of laptop alimenations " it make mosfet and drivers more familiar, I am sure it helps me ! Thank you

[@SathnimBandara]

This is THE best MOSFET driver tutorial on the internet. Thank you professor!

[@sambenyaakov]

Thanks🙂

[@samshoushan2881]

Yes

[@nguyenduke83]

One of the best MOSFET driver tutorials that you can find on the internet. As usual, clips of Pro. Sam Ben-Yaakov are very practical and his explanation is intuitive and can not be clearer. Watching hours of his lectures on KZbin saves me days on the labs. These are some of my favorites on his channels: PWM controllers (signature is peak control mode), MOSFET drivers, Ground looping, inductor/transformers. I just wonder is there any book that he has published which covers those topics, i definitely stock it up on my shelf

[@sambenyaakov]

Thanks. No, have not published books.

[@archie6586]

true

[@alocin110]

Thank you Prof. Ben-Yaakov, well-explained and very thorough. Videos like this help millions of students who cannot afford expensive books and after-school institutions. You are a teacher of millions: what a big class you have Prof. Ben? Thank you for running a school without boundries and with A-class level. God bless you and your team.

[@sambenyaakov]

Thanks for warm words. Comments like yours keep me going.

[@jamesjohnston9319]

Thank you Professor, I love how your videos are the perfect blend of applied engineering and theory/maths! Its very hard to find that.

[@sambenyaakov]

🙏😊

[@BRR999]

This is by FAR FAR the BEST no bullshit down to earth explanation on the internet!!! Thank you thank you thank you.

[@sambenyaakov]

This is by FAR FAR one of the BEST comments I got. Thanks.

[@carmelpule6954]

Such elegance in every depicted detail can only come about through a long experience of dedicated work. Congratulations and thank you for your presentations.

[@sambenyaakov]

Thanks

[@filipradulovic_]

8:30 is best explanation of Miller Capacitance I found out there. Thank you!

[@sambenyaakov]

👍🙏

[@idiragouni5520]

Your explanation is simple, deep and educational at the same time. It's been a week that I try to find a solution to control the mosfets of a speed variator for three-phase Asynchronous motor. A floating power supply was essential, and the methods using transformers or optocouplers did not satisfy me. You just saved my life with this IF2110, thank you so much. In addition let me congratulate you on the English used, simple and concise while in the technical field I am more used to French.

[@sambenyaakov]

Thanks for comment.

[@Troglodita47]

Informative, concise, well-explained... It is clear how much you really love teaching, and we all appreciate it. I am an electronics degree student and even though some of these concepts have been mentioned in class (while talking about converters) only with your explanation do I begin to understand how much there is to know about this subject. I am eager to rewatch the video with time and patience to really soak up everything you said. I would be happy if one day I would be able not only to interiorize the knowledge but to explain it half as good as you do. Thank you very much.

[@sambenyaakov]

Thanks Davis for the kind note. Comments like yours keep me going.

[@BillySugger1965]

That is outstanding! I’m an electronics engineer and design power circuits. I have saved many, many videos on machining and other engineering topics to learn from, but this is the first electronics video I have ever felt the desire to save for future reference. Simply superb!

[@sambenyaakov]

Thanks for kind note.

[@Black26Jack]

Thank you, Mr. Ben-Yaakov. Easy explanation. You are talented teacher!

[@sambenyaakov]

Thanks

[@GluonToo]

Thanks from Poland! Very interesting lectures, clear manner of transmission, information beyond the basics. Something like this I was looking for.

[@sambenyaakov]

Thanks.

[@ohmedarick1]

Wow this is the best explanation on power tutorial I'm trying to build a two phase ---two three phase inverter. Thank you you cleared up so many questions i had...

[@y.e.d5660]

ı am following you over 2 years and sir you are a really good person. because you are sharing with us amazing informations. ı respect you very much. thanks for tutorial. be safe.

[@sambenyaakov]

Thanks. Comments like yours keep me going.

[@IsaacOLEG]

'intuitive " is the word, your reasoning is so clear it is amazing how I can follow you despite being not real electronician, merely hobbyist trying to repair laptops tvs and other ! Thank you so much

[@sambenyaakov]

Thnks for comment

[@IsaacOLEG]

​@@sambenyaakov great you appreciated it, thanks. I have been lost after "gate power loss" (mainly I can understant the preambules of chapters, which is probably enough for me, but the following make me "loose the Arianne's thread" ;) ) of the explanations. Now wondering if I'd better begin by watching the 2 parts on Mosfet's datasheets , (or some other ?) what do you think ? Thank you again

[@DaFratRat]

I love how you frame it from an engineering design point of view. It seems obvious now that you have said it. I'm excited to read through all your series. I hope to be able to apply this knowledge at work soon!

[@sambenyaakov]

Thanks for comment. Welcome abroad😊

[@habtamusium8646]

your video is very useful for pupil in confusion on MOSFET like me. now i am in settling my disturbance and do not afraid to observe at PCB of electronics and give advice for those who turn their face away from PCB. thank you sir !

[@sambenyaakov]

Thanks for taking the time to write the comment.

[@franklinw7320]

Very excellent explanation, professor. I learnt a lot from your video series and got a better understanding of what is really happening in power generators. Thanks again!

[@sambenyaakov]

😊

[@vtgastulo]

Thanks for taking the time to share your knowledge of power electronics Prof. Ben-Yaakov!

[@sambenyaakov]

Thanks

[@burakaltay7485]

I couldn't be more grateful for such an amazing video. Even if I am already graduated, this video helped me understand drivers better than any other lesson.

[@sambenyaakov]

Thanks for taking the time to write the note.

[@movax20h]

Very useful presentation. I like the methodical approach of showing the problem and then a solution. It makes everything easier and show the real engineering and design process. Now I understand a lot of nuances better.

[@sambenyaakov]

Thanks.

[@kolinevans9127]

Wow ‘DC restore’ , there is always some gold hidden in your videos thanks for sharing.

[@sambenyaakov]

👍😊

[@jerrychan1471]

Thank you for your detailed explanations, they are truly educational and practical. I feel like the fog has been lifted in my mind pertaining to this subject matter!

[@sambenyaakov]

Thanks. Comments like yours keep me going.

[@drsanjaykemkar7313]

Quality explanation. Great!! Lot of issues are addressed. Probably best on KZbin.

[@sambenyaakov]

Thank for note.

[@Spark-Hole]

Best preparation, thorough. This vidio will be on KZbin for hundreds of year.Big salute, Thank you.

[@sambenyaakov]

Thank you. You warmed my heart.

[@ecstazyrm]

Best electronics channel on KZbin by far! Thanks!

[@sambenyaakov]

Wow, thanks!

[@세상에예거]

your lecture is fantastic, it's very helpful to understand power electronics. thank you, dear.

[@sambenyaakov]

Thanks (Korea?)

[@arthurm7846]

Your channel is gold, thanks Prof. Sam!

[@sambenyaakov]

I appreciate that!

[@sambenyaakov]

Thanks for comment.

[@sambenyaakov]

Respectable (or not) Niksa, just seen your comments. AS you know, I don't work for you so I really do not have to answer any of your questions. But, as a service to the community I do my best to answer queries that are sent to me. If you would repeat your question in a civilized manner I will answer (unless I miss the question as might happen considering the many questions I receive). Have a wonderful day.

[@andrewferg8737]

Best explanation I've heard so far! Thanks for the education.

[@sambenyaakov]

Thanks

[@ruixiong5237]

It is thorough tutorial both in theory and in practice. Thanks a lot.

[@sambenyaakov]

Thanks

[@richsmith46]

One of the clearest explanations of this topic I've seen. Thanks for sharing

[@sambenyaakov]

😊

[@arthurswanson3285]

You are a teacher par excellence, Professor.

[@sambenyaakov]

Thanks for kind words.

[@zainaabdin]

Though I am late to ur lesson but it was marvelous...as an amateur I encountered tons of problems connecting to mosfets in simple and naive methods which by accident worked but mostly either not perfect or doomed to failure....ur a teacher....but a professional one....so many thanks

[@sambenyaakov]

Thanks for comment

[@davejohnson1589]

Very many thanks Professor for such a prompt reply. As always the more one finds out about a situation the complex it can become. Seems likely my problem has much to do with using 6 MOSFETs in parallel & poor dynamic current sharing. Variation in Vth can result in some devices switching quicker causing others to go out of S.O.A.. Advice appears contradictory as fast switching, am told, coupling gates using low or zero series gate Rg & hard switching helps reduce this effect. Am also told that parasitic oscillation can occurr for the same reason & increasing Rg & fitting your recommended Fe bead on each gate cures. In my case looks like some Rg value between these arguments is needed. Experiment is called for. Thanks again. Dave

[@sambenyaakov]

Have you seen kzbin.info/www/bejne/d6KUeqpsd96Ld9k ?

[@kareemdawood4053]

Thanks for the nice explanation. I have been testing some SiC NMOS and I prototyped a rig with some wires and terminal blocks to see how much switching frequency I can drive the mosfet to with air cooling. I have stray inductance every where of course since it is not a pcb. The circuit is a low side drive of a resistor bank, I observe a weird waveform accross Vds when with the falling edge of the pwm driver. It is not the typical ringing, it is rather a very high spike in voltage that is followed by negative voltage and then the typical ringing around the supply voltage. Snubbing is not getting rid of the first spike.

[@sambenyaakov]

Thanks for sharing. A PCB with a good layout is a must.

[@PSPS437]

Very well explained Dr. Sam

[@sambenyaakov]

Thanks.

[@Azagro]

Very great presentation, covers every aspect about MOSFET driving. Thank you for listening to my request!

[@sambenyaakov]

Thanks. Will see what I can add in next videos. Thanks again for the encouragement.

[@Azagro]

Sam Ben-Yaakov Thank you for your effort, we highly appreciate it.

[@osamaalkassem5676]

Amazing excellent course thanks for every minute of your time .... ❤

[@sambenyaakov]

Thanks

[@mohammedradoan3928]

This was a very informative and well-explained video!!! Thank you sir, for the dedication u put into it!!

[@sambenyaakov]

Thanks for taking the time to write comment.

[@alirezaeskandari2287]

Thank you very much professor!🙏 Your video helped me a lot.

[@sambenyaakov]

Thanks

[@LEO22116]

Your videos are the best. I, as a Master's student of Power electronics, get most of my concepts cleared on your channel. Please explain the effects of body diode in MOSFET and how this varies when we use IGBT.

[@sambenyaakov]

This issue is discussed in some other videos of mine. In short: the body diode of a Si MOSFET is a rather slow diode so there might be a problem of reverse recovery. IGBTs doe no have an intrinsic diodes so you can parallel them with fast diodes.

[@LEO22116]

Could you please share the title of the video?

[@sambenyaakov]

Go to www.advicepoweracademy.com/video-tutorials and search for diode

[@scollyer.tuition]

I've only just discovered this channel, but it looks to be a gem - a real breath of fresh air, with enough attention being paid to the underlying circuit physics to make genuinely useful derivations, as opposed to the vigorous hand-waving available on most KZbin treatments of the material. However, I have a question: in your derivation of the Miller effect, starting from about 5:55, you seem to be claiming that the voltage across C_{gd} is V_{GS} + V_O. From your diagram, the top of C_{gd} is at V_O and the bottom is at V_{GS} - I would therefore expect the voltage across that cap. to be V_O - V_{GS} I am clearly misunderstanding something, but I can't see what it is - maybe I'm making a sign error somehow?

[@sambenyaakov]

Thanks for comment. This is indeed confusing. Look at this this way: Looking from the gate, Cgd was initially charge to -Vo, and then charge to Vgs. So the total charge needed is (Vo+Vgs)Cgd

[@thisoldjeepcj5]

Very useful. Very good presentation.

[@sambenyaakov]

Thanks

[@ChrisSmith-tc4df]

I used a form of that DC restorer circuit to develop a solid state version of a gate driver for a very large SCR that needs a many amps to turn-on quickly and reliably yet one wants that to be brief to reduce unnecessary gate power dissipation. Selection of a quality pulse capacitor that can handle that repetitive peak current turned out to be key for reliability.

[@sambenyaakov]

Thanks for sharing.

[@jellyguo2450]

Wow, it still helps people like me trying to overcome the ringring of the high side MOSFET.

[@sambenyaakov]

👍

[@KamleshGadhvana]

thank you very much from India.

[@sambenyaakov]

Thanks

[@yamensaad6832]

One of the best videos in youtube Thank you

[@sambenyaakov]

Thanks👍

[@peterhemmings2929]

What a superb lecture, thank you so much

[@sambenyaakov]

Thanks

[@ankitkherodiya2961]

Great video. Detailed explanation of gate drivers Thanks a lot

[@sambenyaakov]

Thanks for comment.

[@alexshei5061]

The best tutorials on power engineering!!

[@sambenyaakov]

Thanks😊

[@vincenzodemaio7175]

Clear and interesting explanation....Thanks a lot

[@sambenyaakov]

Thanks

[@dimtsk838]

Great explanation. Thank you for sharing your knowledge!

[@sambenyaakov]

Thanks

[@rayking3483]

Sam, Thank you for your explanation of the concerns of power mos gate driving. I did notice one circuit that was given up too quickly. That was the p and n fet totem pole gate drive that was given up on because of shoot-through. If the input gate resistor is moved from the power fet to the source of the driver p fet you get a fast turn off and a reduced turn on current which is desirable with out shoot-through. Respectfully, Ray

[@sambenyaakov]

Hi Ray, Thanks for comment. Please indelicate which slide no. or video minute you are referring to. I am always happy to learn but I am not sure what you meant.

[@rayking3483]

Sam, I was not ready for such a fast response. The DC-DC Converters page 8-18. The lower schematic of the cmos gate driver. Thank you. Ray

[@sambenyaakov]

Good point if you want an symmetrical drive. In fact you can put two resistors in series between the drains of the drive FETs and connect the gate of power transistor to midpoint.

[@cyberphox1]

Great video prof. Thank you 🙏

[@sambenyaakov]

Thanks

[@rashmiranjannayak3251]

Hi, Sir Sam Ben Yaakov, really its your maturity in cool engineering.

[@sambenyaakov]

Thanks.

[@Stelios.Posantzis]

Excellent lecture series!

[@sambenyaakov]

Thanks.

[@rodrigolindemberga]

Boa tarde! Gostaria de agradecer os ensinamentos que estou tentando em vários vídeos que você está produzindo. São os melhores. Parabéns, ótimo trabalho! Obrigado!

[@kristhetrader5029]

Indeed VER well explained from the first minute already! Excellent stuff, would be nice to have a PDF of this...

[@babylonfive]

This is great stuff as usual. Thanks for helping remind me how my HV motor driver gate drivers behave! Best regards.

[@sambenyaakov]

Thanks

[@stanislavsubrt886]

Thank you very much! Outstanding explanation, practical topics...

[@mohammadhafeezkhanraja4758]

Thanks prof.Ben for detailed lesson on Mosfet

[@sambenyaakov]

Thanks.

[@ottoomen5076]

I appreciate you more everyday.

[@sambenyaakov]

😊🙏

[@marcinszajner2924]

I think is usefull use term "critical resitance" for oscillation. Critical resitance is Rcrit = 2*sqr(L/C) which give no oscillation beatween L and C, because it gave critical aperiodic course of voltage. Thanks for great material, which take all important information in one lecture.

[@sambenyaakov]

Thanks for comment.

[@samshoushan2881]

you are very kind human person

[@sambenyaakov]

😊Thanks

[@cyrielmabilde7729]

Excellent explanation, thank you

[@sambenyaakov]

Thanks

[@mortenrolsing7137]

Fantastic video, thanks a lot, it helped me understand gate charges, it has always been very difficult for me to realy understand. Greatings from Denmark Morten

[@sambenyaakov]

Thanks

[@elvismao3924]

Great tutorial ! Thank you very much!

[@sambenyaakov]

Thanks

[@wariskn7096]

I really loved it....the drawings are too clean!!!

[@sambenyaakov]

👍😊

[@sirousmohseni4]

Excellent video. Thanks

[@sambenyaakov]

Thanks

[@Pudersepp]

Thank you very much for sharing your knowledge in such a structured manner! I'd love to be your student at the university :)

[@SureshChandraMannava]

Thank you very much for detailed explanation.

[@sambenyaakov]

🙏😊

[@power-max]

At 15:00, with this method, shouldn't there by a multiple of 2 for the switching frequency? Because every cycle you need to turn the element on, then off? Therefore you have to dissipate Q*Vgs twice per cycle, so the resultant formula should be *2* * f_s * Q * V_gs

[@sambenyaakov]

No. Think about the energy that comes out of the driver (only at turn on)

[@power-max]

@@sambenyaakov I see! I though about it some-more and realized the classic physics formula of energy in a capacitor is 1/2*C*V^2. Well at a fixed/constant 'V' if only half the energy is stored in the capacitor, the other half must be dissipated in the resistor. Both times charging and discharging through it. Not sure if that's the right way to think about it (kind of 'hand wavy' description) would you agree?

[@buffplums]

This is so good thank you very helpful

[@sambenyaakov]

Thanks for comment.

[@davejohnson1589]

I omitted, in my question regarding fast turn-off diodes shunting MOSFET series gate resistors, to say that I do not know much about the original drive speed or frequency but I do know each Rg was 47R with no fast turn-off diode. My question really should have been is relability improved, maybe at a reduction of efficiency, by using a slower drive edges? I have attempted to comply with your recommendations with snubbers & safely limitted my device overshoot although admit I have not verified my circuit at the full 6kW. Thank you again. Dave johnson

[@sambenyaakov]

Hi Dave, I have seen the two part of your query. Fast turn off could be beneficial to improve the efficiency. The 47Ohm will slow down turn on and hence help reduce the reverse recovery spikes.

[@samlee1089]

Learn a lot from this video! Thank you sir!

[@binzhao2544]

Very useful. Thank you, Professor.

[@sambenyaakov]

😊

[@mcfan1956]

Thanks!! i like all your videos. im glad i can be your student on youtube. respect, sir!

[@sambenyaakov]

Thanks for comment.

[@mohsen8468]

Thank you Sam keep it up

[@Berilium65]

Excellent explanation! Very well done!

[@sambenyaakov]

😊👍

[@elgato2642]

I am delighted that I found your channel. I just subbed and I will study hard. Thank you!😁

[@sambenyaakov]

👍🙏🙂

[@santiagoverne]

I appreciate very much your explanations. I wish to ask you if middle trace in 11:02 should be falling instead of rising, given that Igate is positive. Thank you Professor!

[@sambenyaakov]

Wow, you got me there. You are correct if this is the voltage on the MOSFET Vds

[@Electromowls]

your videos are so helpful for me sir ,thank you!

[@sambenyaakov]

Thank Einstein, great honor

[@bikefarmtaiwan1800]

So interesting! Thanks for teaching.

[@sambenyaakov]

Thanks for comment.

[@donaldwright2426]

I realy like your presentation and also, took notes. However, I'm designing a 144Vdc 6phase inverter at 100A to drive a dual stator PMSM that I've design and currently being built. Just when do we need to isolate (galvinize) the power side of the logic side? Is it just a question of preferences or is it most likely due to different codes or standards if an electronic device is intended to be commercialize ? For a start, I've decide to have a none isolated power and logic power and the choosen driver is the IRS21864PBF which does have a seperate logic ground (VSS) and hi volt power gound (COM) just as you explained and will have to be tie together. At least, I've got this part of my project right! Thanks.

[@sambenyaakov]

Hi Donald, The purpose of gate drive isolation is not isolation per se, but ground separation. The grounds can (and recommended to be) connected at one point. Without isolation the digital signal reaching the gate driver (which should be close to switches) may and usually be corrupted due to the voltage drop along the ground. Some of this is partially covered in kzbin.info/www/bejne/q37IaqSqncidiZY . If not confidential, love to hear about your dual stator drive and motor.

[@donaldwright2426]

​@@sambenyaakov Thanks for your answer. For now, I will stick with my non-isolated drivers since I'm exploring different options! My motor project is not confidential. I invite you to read here: openvolta.blogspot.com/ and my youtube chanel : kzbin.info/www/bejne/aYabaKpor9yifs0. I've not been very good at updating my blog or youtube channel. Since, there has been a couple of updates to design that has enhanced the torque and the efficiency. Theoretically, according to the simulations in in FEMM, it can reacht a maximum efficiency of 97%. It's not taking into account the mechanical losses. Also, according to research that I've read, the rotor design is prone to a lot of eddy current losses. So heat is expected and demagnetizing the PM is an other issue. This motor is intedned to be a direct drive. It output 99Nm à 100A nominal. The copper losses are low. THe outer stator has 7 wound turns and the inner stator as 4 turns. At a certain point, the outer stater will not be injected with current and only the inner stator will be energized. Again thank you!

[@sambenyaakov]

@@donaldwright2426 Thanks for sharing. Interesting. Will study it.

[@donaldwright2426]

​@@sambenyaakov Here's my email donald.wright @ openvolta.org if ever you would like to have my raw data of the FEMM simulations. Also, thank you very much, and thanks you in advance if ever you do comment about my motor project. Best regards, Donald W.

[@BB-iq4su]

At 23:09 I believe Vt of both the PMOS and NMOS should be greater than 1/2 Vc.

[@sambenyaakov]

This is preferred but many circuit operate with Vt

[@rajendrarajkumar6483]

Sir your video is very useful thanks

[@sambenyaakov]

Thanks.

[@shamiksen9719]

Thank you sir for the explanation

[@sambenyaakov]

Thank you for note

[@power-max]

I thought I would try to use the IRS2186 "4A" banner spec to drive 2 HY1920P MOSFETs (4 total) and it's looking like the driver will need to deliver peak 3A. Qtot=200nC, Vgs=10V, Vds=170V Although in practice it gets boiling hot! It is dissipating around 2W of power! Thanks for teaching me this!

[@sambenyaakov]

What frequency?

[@power-max]

@@sambenyaakov 300kHz

[@sambenyaakov]

@@power-max Yes, the power dissipation is indeed far from being insignificant.

[@saleembeg3113]

Excellent Sir... 👍

[@sambenyaakov]

😊

[@biswajit681]

@1:27 after Q2(x axis) isn't it it charges only Qgs not Qgs+Qgd .. because till now all the app notes I have found everywhere it has been mentioned only Qgs not Qgs+Qgd .. Correct me if I am wrong

[@sambenyaakov]

You may be correct in saying that in the app notes you have seen, the charge is Cgs, but this is incorrect. If this charge would have been Cgs, why do you see the flat portion? This plateau is due to Miller effect caused by the charging of Cgd. All this is explained in video.

[@biswajit681]

@@sambenyaakov Sir I am referring after Miller platue region ( at the end of Miller platue region Cgd charges fully) when VGS rises futher at that time only Cgs charges to reduce RDSon.....but in your videos it shows QGS+QGD both charges. Am I making any mistakes?

[@sambenyaakov]

@@biswajit681 Yes you do. Once the plateau ended Cgs and Cgd are in PARALLEL and both continue to charge (no Miller effect)

[@MRTOPHAMHATRIEU]

thanks for the knowledge. would you please also share the slide of the lecture for this. This would be great.

[@sambenyaakov]

Sorry for being unable to share the slides

[@mkaras98]

Do changes in the depleted area during on/off switching of the MOSFET significantly affect the capacitance of Cgd and Cds? great channel greetings

[@sambenyaakov]

Thanks. I don't think so.

[@skycollection]

Voltage in i can see L is a coil...? how many ohms resistance...? the value of the Rg..? and the final cap..? and the input voltage...?

[@sambenyaakov]

To what minute in video are you referring to?

[@skycollection]

@@sambenyaakov 3.26 the value of the Rg , L is it a coil..? what resistance ohms...? diode and final capacitor.......

[@skycollection]

Sam Ben-Yaakov Sam, i am skycollection Mexico, i have implemented a tri-filar pancake coil with ferrite in one of the faces, this coil consist in three groups of 8 pancake coils connected in series, staked in a PVC PIPE, the three groups of pancake coils are isolated from each other, i have a circuit connected in one of the groups, the other two groups "induces" the current. I need a circuit based in a mosfet to get high voltages and for the three groups, and extract the energy from the pancake coils. You can see the video: kzbin.info/www/bejne/omWoiKh7gLyXrtU

[@skycollection]

@@sambenyaakov I forgot to tell you that I did not study electronics and I am learning, the circuit you see in the video I implemented it as an experimental circuit.

[@sambenyaakov]

Hi, This fig is just for concept. Details are in video later. L is an inductor. Looked up you video, too bad I do not understand Spanish. Looks interesting.

[@narasimha4660]

Very helpful sir.

[@sambenyaakov]

Thanks

[@afonsomanuel1585]

What a great video.

[@sambenyaakov]

Thank you!

[@maksudulhossainjewel378]

Hello Dr. Yaakov, can you please upload something on double pulse testing explanations, pitfalls etc. ?

[@sambenyaakov]

A good subject. Will try.