Here is why Gate-Drive Transformers are sometimes essential! | MOSFET Driver Part 2 (Potential-free)

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Do you want to know more about the Würth Elektronik components? Then click here: bit.ly/we_onlinecatalog_EN and visit the page bit.ly/Gate_Drive_Transformers to get an overview of gate drive transformers.
Würth Elektronik products, which were used in the video:
- WE-GDT Gate-Drive-Transformer: bit.ly/WE_GDT_en
- WE-GDTI Gate-Drive-Transformer: bit.ly/WE_GDTI_en
- WE-AGDT Auxiliary Gate Drive Transformer: bit.ly/WE_AGDT_en
Previous video: • Fix It!: Self-Dimming ...
DIY Tesla Coil video series: • Make your own Tesla Co...
MOSFET Driver Part 1 video: • Here is why MOSFET dri...
Everything you need to know about Transformers video: • Is it easy to create y...
Facebook: / greatscottlab
Twitter: / greatscottlab
Support me for more videos: www.patreon.com/GreatScott?ty=h
In this video I will conclude the MOSFET Driver video series by having a closer look at Gate-Drive Transformers. As a practical example I will be using a Tesla Coil driver circuit that uses a Gate-Drive Transformer to control its MOSFETs. We will be finding out how the transformer works, how to use it in a circuit, how to create a DIY version and why using a commercial solution often makes more sense. Let's get started!
Websites which were shown (used) during the video:
www.ebay.de/itm/230V-Teslaspu...
ferroxcube.home.pl/news/gate%2...
www.richieburnett.co.uk/temp/g...
www.we-online.de/katalog/data...
Thanks to the Würth Elektronik eiSos Group for supporting this video.
Music:
2011 Lookalike by Bartlebeats
0:00 Presenting my new Tesla Coil
1:30 Why does it perform better than my old one?
2:42 Intro
3:03 Overview of what a Gate-Drive Transformer does
4:36 How does the practical Transformer work?
6:13 Having a look at the Waveforms
6:48 Complementary components for the Transformer
7:36 Creating a DIY Gate-Drive Transformer
8:03 Testing the DIY version
9:03 The problem with designing a DIY version
10:16 Getting a commercial Gate-Drive Transformer
11:05 Testing the commercial solution
11:30 Verdict

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5 июл 2024

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Комментарии : 409

@Asu01 3 года назад

The transition to the sponsorship was so smooth, I didn't realize that I ordered some gate drive transformers from Würth Elektronik and now, they just arrived at my front door.

@HSelimSerdar 3 года назад

LMAO

@greatscottlab 3 года назад

Smooth is my middle name ;-) Oh boy. Secreat revealed.....

@liviuconstantin9960 3 года назад

@@greatscottlab How about you reveal another secret: Did you take the "Great Scott" name from the "Back to the Future" movie?"

@JjMn1000 3 года назад

Lol

@imbw267 3 года назад

The game was rigged from the start

@supreethathreyas4577 3 года назад

1:24 greatScott : decent arcs electroboom : !@#$%

@naivedyasharma5821 3 года назад

Lol

@felixb.1756 3 года назад

Look at my tesla coil on my channel. These are decent arcs!

@jhoughjr1 3 года назад

i hate to say but my tiny coil is almost as big as those

@anuragdeshkar 3 года назад

Man your video production quality is best and also technical knowlegde!!

@greatscottlab 3 года назад

Thank you :-)

@Bhavesh_g20 3 года назад

It feels so good whenever I see that notification from great scott Really appreciate your work

@greatscottlab 3 года назад

Happy to hear that!

@Bhavesh_g20 3 года назад

@@greatscottlab I've been following you since years I'm very glad you replied It means a lot to me 😊

@Av-ks8uc 3 года назад

Your videos are awesome! You inspired me, with your LED cubes videos 6 years ago to start learning about electronics, and now, I am 3 years into my EE degree and I love every bit of it! Keep up the great work man, and stay safe!

@greatscottlab 3 года назад

Great story mate😁 Keep going👍

@rolandasa.1112 3 года назад

Thanks for the video! Gate drive tranformers were always a grey area to me, but now with the knowledge you provided I can make projects I never imagined I could build.

@greatscottlab 3 года назад

Wonderful :-) I love to hear that.

@Buzzhumma 3 года назад

I always know i am going to progress a lot in electronics when the Great Scott notifications come up . You are like purity of knowledge and a great teacher . Thankyou !👍🏻🙏

@andrewkay9226 Год назад

As always a totally engrossing & educational video. The schematic drawings & accompanying explanations are the best on RU-vid

@darekmario446 3 года назад

That was a quite helpful video that simplifies this topic. I've always been "scared" of such GDT Circuits. You motivate me to try and practice such solutions! Bleib gesund!

@greatscottlab 3 года назад

Awesome👍

@thebuttracoon8245 3 года назад

One more thing to put in my noggin. Thanks Scott! Wishes from Lithuania

@Stoneman06660 3 года назад

Looking forward to going whole hog on my own SSTC as I move up from Slayer Exciter variants to more complex systems. Your tutorials and how-to videos are golden for this. Many thanks from Australia! :D

@sFeral 3 года назад

Check out the Tefatronix mini SSTC circuit

@GnuReligion 3 года назад

A Dixon Multiplier can also be employed to drive/store a charge of Source + 12V, then drained to the gate through an optocoupler.

@saxon215 3 года назад

As always a well researched and informative video. I wish I could hand draw circuits as neatly as you

@attackaffection5444 3 года назад

Woah didn't expect that coming!

@adarsharao 3 года назад

Thanks for the tutorial... it was really useful.. although I studied these things in college, my teacher hardly had any hands-on experience, he made it so boring that I never apricated power electronics... now it looks a lot interesting.

@freewarekr 3 года назад

I saw it well. The content structure, courses, and graphics are all nice. Learn a lot.

@pete3897 3 года назад

What a seriously good serious this is :) EDIT 8:19 - now that sounded different! Great job :) Your explanations are fantastic BTW.

@jakobhalskov 3 года назад

Very useful for my DIY induction heater project :) Thanks for sharing!

@zvotaisvfi8678 3 месяца назад

Wow I Love this Idea ! Thanks for sharing I never thought about this before ! Thanks !

@dipubiswas8520 2 года назад

Hi great scott, your videos are always very informative & practical

@amansaxena5898 3 года назад

Love the MOSFET series ♥️

@micaiaskauss 3 года назад

An audio tip for you: To reduce the breathing sound between your sentences, use a noise gate (or expander) before your compressor. Your videos are awesome, keep it up.

@gorillaau Год назад

What if he stops breathing? Is that a satisfactory solution for a home studio?

@micaiaskauss Год назад

@@gorillaau No, I actually like this guy, but you can stop if you want

@omsingharjit 3 года назад

This types of videos are so helpful

@joaolucastorres6845 3 года назад

Great video as always!!! Cheers from Brazil!!!!

@firstlastname99 3 года назад

I'm getting a great education from your work on this channel.

@StephanYazvinski 3 года назад

This is pretty cool keep it up.

@electrohardik8497 3 года назад

Wow , really great I think when I will grow up. I shouldn't go to any University/college for studying electronics as , I have learnt almost everything from you. , I think I am your youngest viewer though , support from India

@Debraj1978 3 года назад

For frequency > 100KHz and high side driver, transformer based gate driver is a better option. If you only have high side drive (with no complementary low side), then transformer based gate driver is the best option.

@rohanpawar1603 3 года назад

The way u draw circuits is amazing

@greatscottlab 3 года назад

Thanks :-)

@masoudnikroo6775 3 года назад

You're actually GREAT, thanks a lot!

@Gamezone-sd3er 3 года назад

Thanks now I know why cfl driver circuit have this type of feedback ❤️

@danstark462 2 года назад

Thank you sir. You thought this through very well.

@neagoecatalin879 3 года назад

Thank you! Great presentation, as always. I've played in the past with the gate transformers, when I was building the solar charge controllers and the multiple, galvanically isolated outputs bench power supplies. ....and I would say that the bootstrap drivers are, to me more reliable and more versatile. Also maybe because, when comes to calculate those transformers I quickly become lazy/confused/stuffed (?) :)) But I still try to understand what/where could be the advantages of using a gate transformer. Maybe on higher frequencies? Again, thanks! All the best!

@Purple431 3 года назад

Yay! The video I have been waiting for!

@cornevanzyl5880 3 года назад

Wow man, thank you. You really taught me something.

@pi-tech1817 3 года назад

Brother you deserve more views and subs,salute for u ,u doing a great job by sharing knowledge of electronics. I am also electronics and electrical engineer, still studying though,but I am very fasinated in the field of electronics. Learned Soo much basic things from u and electrboom ,plasma channel.👏👏👏great job keep going

@attackaffection5444 3 года назад

Congratulations on 1.5mil subscribers .Wished electronics was a bit more mainstream so you could have a lot more :D

@greatscottlab 3 года назад

Well, I am still happy that so many people watch my videos and are interested in the subject.

@attackaffection5444 3 года назад

@@greatscottlab 👍

@ronvaiz123 3 года назад

Great video as always

@easyelectronics4364 3 года назад

Beautifully explained! ❤️

@greatscottlab 3 года назад

Thank you! 🙂

@masondaub9201 3 года назад

Funny timing, I just made my first Tesla coil a couple weeks ago with a gate transformer.

@vishnup.s.8987 3 года назад

This is moment the moment I have been waiting for

@squadus1986 3 года назад

Bro .. malayali alle

@kennethlazo940 3 года назад

Very useful video as always thks

@vivekchauhan7468 3 года назад

As always nice and informative video. One video request... Make it if possible (according to your convenience) How to measure current using shunt with OP-AMP with microcontroller.

@rougenaxela 3 года назад

For those who like Digikey or Mouser for purchasing parts online, note that the "Pulse Transformer" section is where you'll find these sorts of gate drive transformers in the catalogs, including some from the sponsor Würth Elektronik. :-)

@AntonioBdeJesus 3 года назад

Fantastic! Thank you very mutch for sharing!!

@ELECTROGYAN 3 года назад

Thank you for this video But hey Scott can you explain what is boost trapping.... in briefly..

@greatscottlab 3 года назад

Watch Part 1.

@Dudong18 3 года назад

I'm also your electrifying fan, keep it up

@greatscottlab 3 года назад

Thanks mate :-)

@Dudong18 3 года назад

@@greatscottlab No probs, it's also my hubby

@firefox1136 3 года назад

Very nice, I hope, that at some point we will see it at full power. (230v)

@jamesjohn2537 3 года назад

Thanks bro. Good explanation!

@MCsCreations 3 года назад

Pretty interesting, dude! Thanks a lot for the lesson! 😃 Those transformers with a magnetic ring and wire I would call analog option... That would show easily all the difficulties! 😂 Anyway, stay safe and creative there! 🖖😊

@florintherepairman9873 3 года назад

your videos are the bestt!!!👍👍👍

@YDKMPablo 3 года назад

We've got the same variac! Amazing video. About soldering, you'll get cleaner solders if you heat the pad among the leg at the same time in PCB's.

@charlesdickens6706 3 года назад

.....okay, and in 2¼ minutes of video I've heard you pronounce the word 'series' as 'serious' . I was also making this mistake when I was eight years of age. Actually your English is very good . Thanks for your work .

@viniciusfriasaleite8016 3 года назад

Great, now I'm waiting for a video with more power on this tesla coil

@patrickjoseph9476 3 года назад

Scott, bootstrapping can be also done for a single MOSFET too. Refer, 0033mer's video on MOSFET bootstrapping.

@tejassingh3591 3 года назад

Very good job

@JADES-GS-z13-0 3 года назад

Please make a HFSSTC.

@titasroy9820 3 года назад

I want it too

@prasunkarmakar3303 3 года назад

please please bro make video on this topic❤️

@avikroy9698 3 года назад

You should collab with electroboom. One check circuit 5 times before running it and other one blow circuit breaker 5 times.

@greatscottlab 3 года назад

I can put it on my to do list :-)

@bashaaksema94 3 года назад

Very cool video! One thing though, for a DIY project it is not easy to find a gate drive transformer. Mostly because they are not that widely availeble and also because you more often then not require some specifics that a supplier cant offer you

@charletonzimmerman4205 3 года назад

D.C. Welders use same principal, a small voltage winding controls variable, welding current, called a "Saturable reactor", also High voltage, Arc Furnace, for steel Foundry's.

@piconano 3 года назад

Solid video.

@osa1121- 3 года назад

Hi! I am ur biggest fan ( probably) :D

@warrenking1815 3 года назад

Very nice to see a left handed electronic engineer( like me ) who can draw such great schematics!

@greatscottlab 3 года назад

Thanks✌

@matthewmaxwell-burton4549 3 года назад

Nice vid ! I was wondering, what is the coupling factor between the primary and secondary Tesla coil ? And what is the ressonance frequency of the secondary coil (taking into account the parasitic capacitance). If my memory is right you'll need to drive the coils at this frequency and have low coupling. That's how we got it to work at uni a while ago.

@750kv8 3 года назад

What wasn't obvious why there wasn't as much of a saturation problem with the commercial GDT is that, it must use more turns with a thinner wire, and most importantly, theres a gap spacer in its core, which the toroid transformer clearly lacks. A submillimeter gap in the core prevents saturation, and in switch mode transformers (inverter PSU's, flybacks, electronic CFL / fluoro ballasts etc.) it helps the magnetic field to collapse as quickly as it can, releasing energy stored in the core. Very well made video, Thank You! Great channel! 👍

@d614gakadoug9 9 месяцев назад

The last thing you want in a gate drive transformer is energy storage. A ferrite with a permeability of 5000 is usually quite suitable for a gate drive transformer and requires only a few turns for typical modern switcher frequencies. You don't gap the core for a half-bridge converter. Why would you gap the core for the gate drive transformer for the half bridge? Flyback converters are another matter altogether. There the whole intent is to store energy because the inductive component is not used as a transformer at all, except with regard to multiple secondaries.

@750kv8 9 месяцев назад

@@d614gakadoug9 - I admit i was mixing up things a bit.

@patterrr Год назад

Scott I just discovered your channel, this is a great video, you got my subscription! I'm curious, how did you probe these circuits with your o-scope, considering that you need separate grounds for your primary and secondary sides? Did you end up using a differential probe one side? Thanks!

@throttlescience3639 3 года назад

You are a great teacher

@greatscottlab 3 года назад

Thanks :-)

@dinshithd515 3 года назад

You are always great.

@omsingharjit 3 года назад

Hy is it bad idea to replace Half bridge Gate driver ic with Gate driver transformer in diy class D Amplifier ? Because you have mentioned overshoot , oscillation in waveform ?

@chanakasampath9138 3 года назад

Thanks,great vedio.

@greatscottlab 3 года назад

Glad you liked it!

@abhijitdey5060 3 года назад

Helpful video. I have a question. How to calculate pcb trace width for greater than 35 Amp current rating ? 👍👍🙏🙏

@reeffisher9393 2 года назад

Nice video, but note...Galvanic isolation does not = safe. Many gate drive transformers only provide functional isolation which is not suitable when "safety isolation" from AC mains is required. In most cases any user accessible downstream circuits which have a working voltage upstream greater than 60VDC or 42.5Vac should be considered "safety isolation" required. For reference these are the limits for UL Class 2 which is good to follow if no other information is available. In that case you would search for a commercial gate drive transformer which has at least basic isolation, but ideally reinforced (double) isolation. There is also the matter of creepage and clearance, but that's for a different video. :-)

@korishan 3 года назад

I have watched many of your videos, which btw, I enjoy how you break down the electronics into something easy to understand (even though you aren't a native english speaker, I can understand you very well). A few questions have come to mind: 1) How long does it take you to draw all those schematics? You are very meticulous in the drawing. Is the one for the video much neater than the original? 2) With your drawings, how come you go over the lines multiple times when the first mark is quite visible? You use very good lighting, nice white paper with a very dark marker. 3) I've forgotten what my other question was. Will have to post it later when I remember it 😜

@bhu1334 3 года назад

Right timing for my sstc build. I was planning on using half bridge drivers with totem poles. Maybe if it isn't satisfactory I'll use a gdt, with different gate drivers. Btw Great Scott have you tried running your circuit interuppted with rectified mains?

@greatscottlab 3 года назад

Nope. Sorry. I think my lab is too cramped to ever try out mains voltage directly.

@Neshx1 3 года назад

As usual u have a nice hand writing

@BenLMitchell 3 года назад

Another video to watch tomorrown

@letstec9117 3 года назад

bro biggest fan

@greatscottlab 3 года назад

Thanks mate :-)

@JaviersDIY 3 года назад

Your very amazing sir

@nachoeschetini1718 2 года назад

With a zvs a FB a spark gap in paralel and a condenser in serie whit a primary coil u got a bigger effect in the secondary coil

@Graham_Wideman 3 года назад

Hey there Great, I think your home-brew tesla coil may be suffering from having that corrugated hat. The peaks of the ridges become regions of high charge concentration, hence high voltage, and thus leak charge to the atmosphere disproportionately compared to the average voltage, this limiting the overall voltage the apparatus can achieve. That's the motivation to have a smooth dome/hat.

@itamarcohen6868 3 года назад

Can you make a video about how to select those component values? Interested to make my own Tesla Coil

@jim40135 3 года назад

10:32 woah woah woah, wait a minute... you've got a *purple* marker pen as well? :o

@DEtchells 3 года назад

I wonder: Could you avoid the core saturation by just reducing the drive voltage, then adding more secondary turns to boost the gate drive voltage back up again? I guess that would add more circuit complexity, to make a driver that’d run the transformer primary at a lower-than-system voltage, but I’m curious if that would fix the issue of core saturation, all else being equal?

@SolaLupus 3 года назад

Nice video, didn't know about gate transformers before. Do they also apply to low side switching?

@greatscottlab 3 года назад

Yep. You can use them for switching your MOSFET wherever it is positioned ;-)

@moiquiregardevideo 3 года назад

I am starting to understand inductors and transformers thanks to your videos on the subjects. It would be interesting to know why the tesla coil produce higher voltage with the transformer. Is it because of a hard start and hard stop, because of the spikes on each edge? Or is it because or slightly overlapped on/off for both transistors from faster turn on? Does the improved circuit consume more current when given the same power supply voltage?

@ancientflean7594 3 года назад

The arc is smaller compare to the Electroboom, but is such a good video

@sudheerkumar5966 3 года назад

Very good

@mrcheeseman1327 3 года назад

Great Scott I watched a video where you made your own IR remote and you ran the arduino mini off a 3v button cell. I was a bit confused because I thought you could only power the arduino mini with 5v or 6 to 12v with the vin pin. I did some research and found out that you can't power an arduino through the 3.3v pin. So, can you tell me how you powered it? (So, I can power my projects off a 3v button cell but using an arduino nano and can you power an arduino with 3v?) Did you use a boost converter or is it just feature on the arduino mini through a different pin?

@greatscottlab 3 года назад

Connected it to the Vcc pin.

@mrcheeseman1327 3 года назад

@@greatscottlab Thank you.

@power-max 3 года назад

I used bootstrap drivers on my tesla coil, see my latest video to see how it performs on 120VAC. (video suggests I used 2 power supplies but for the showcase I just hooked it up straight to halfwave and fullwave rectified mains)

@Caio_Meira 2 года назад

Thank you! I would to ask a question. If I wish to operate my MOSFET with lower frequency, should I choose a gate drive transformer with higher Voltage-uSecond ?

@nozma6615 3 года назад

Hi great scoot, can you make video about how to repair electronics. For example what should we check at first, what is the common fault and something like this. I think it will be very interesting video. Thank you.

@user-nr1wn9qt1m Месяц назад

Thanks a lot

@ignition_electronics2520 3 года назад

Well explained Thanks

@greatscottlab 3 года назад

You are welcome

@alexcaceres3060 3 года назад

Nice info!

@osa1121- 3 года назад

Liked even before watched

@ElIsraelJijijiji 2 года назад

1:19 that's why you don't get big arcs, that's a pretty simple way to not get advantage of your mains voltage

@electronic7979 3 года назад

Very helpful video. I liked it

@on8rth 3 года назад

Maybe one important addition that maybe requires an Part 3. Gate drive transformers work only when you have a 50% Duty cycle. This works for the tesla coil because of the quasi resonant topology that it uses, where the frequency determinants more or less the power transferred to the secondary side.