I am a former student of yours, graduated in 2008. It's great to see your lectures on youtube, just as good as they were back in the day.

@sambenyaakov

3 жыл бұрын

👍😊

I spent only 4 minutes and I can already feel that it is going to be a fantastic lecture

@sambenyaakov

5 ай бұрын

🙂👍

Your tip on how to resolve for the polarity of the inductor voltage is pure genius.

@sambenyaakov

Жыл бұрын

🙏👍

The world's best teacher thanks sir

@sambenyaakov

Ай бұрын

Wow! 😊Thanks

It is rare to find someone clearly explaining what happens in a somewhat complex circuit. Thanks for sharing.

@sambenyaakov

7 жыл бұрын

Thanks for comment.

Cannot thank you enough for this video. I pay thousand's of dollars to my university and didn't get a single concept from my professor with 1 week of lectures. And here you are explaining it in 30 mins and now I have crystal clear concepts about buck converter. I m very grateful to you for this video. Thank you

@sambenyaakov

3 жыл бұрын

Thanks for kind words. Comments Iike yours keep me going.

Thank you. I took this course with an extremely incompetent "professor" at Cairo university. There's a world of difference here. Thank you again.

@sambenyaakov

2 жыл бұрын

😊I missed you in class while I was teaching at the university.

Very clear explanation .. Great job

@sambenyaakov

2 жыл бұрын

Thank you!

Excellent, thank you!! I went from barely understanding how they work to full basic understanding of inductors and buck converters, something the papers and other explanations I found online was not able to do. I love the graphical explanation with the graphs, I'm a bit of a visible learner so they helped a lot.

@sambenyaakov

7 жыл бұрын

Thanks for comment

@user-vj5wd6wq1v

4 жыл бұрын

@@sambenyaakov No one in a world can help me with this question 😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭😭🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏 Why we don't consider Miller effect in Common Gate configuration when we study high frequency response

Truly amazing presentation. Thanks.

@sambenyaakov

2 жыл бұрын

Thanks

Thanks you, sir. Detail and systematic explaination.

@sambenyaakov

Жыл бұрын

Thanks

The best explanation on this subject I have ever seen on youtube. Thank you very much.

I have been searching for the derived equations for hours... Thanks Sam.. Now it is so simple...

@sambenyaakov

3 жыл бұрын

😊🙏

Excellent, easy to understand, Thank you , Professor !

@sambenyaakov

Жыл бұрын

🙏🤔

What a difference it makes learning from an educator who really understands the subject!!! Thank you Sir.

@sambenyaakov

2 жыл бұрын

🙏😊

Very clear explanations. Thanks a lot. Before watching this video, I had very little understanding of the Buck converter. But I have a much better understanding now.

@sambenyaakov

3 жыл бұрын

Thanks. Commits like yours keep me going.

The best explanation I saw about buck converters. Great lecture!

@sambenyaakov

3 жыл бұрын

Thanks.

Big thank you from Thessaloniki Greece!

@sambenyaakov

6 жыл бұрын

Thanks. AS you might know, we Israelis, have a worm spot in our heart for Thessaloniki

Excellent analysis for Inductor and Buck Converter. Thank you!

@sambenyaakov

4 жыл бұрын

Thanks

From undergrad to grad school to working as an fae, your videos have been really helpful. Thank you :)

@sambenyaakov

2 жыл бұрын

Wow. Thanks for sharing.🙏😊

Thank you Professor Ben-Yaakov! Very clear explanation and video.

@sambenyaakov

7 жыл бұрын

Thanks for comment.

excellent fucken video! thanks prof!!

Best video on buck converters that I have ever see. Thanks

@sambenyaakov

6 жыл бұрын

Thanks for comment

Dear Sir, Excellent, thank you :)

@sambenyaakov

2 жыл бұрын

Thanks

One of the best explanations ever

@sambenyaakov

3 жыл бұрын

Thanks.

This is an excellent lecture. It cleared up some confusion I had. Thank you.

@sambenyaakov

2 жыл бұрын

Thanks

You are an amazing professor. God bless you

@sambenyaakov

6 жыл бұрын

Thanks for comment.

Well, I've got my M.Sc. In EE already, but still... WOW! The explanation was amazing!

@sambenyaakov

3 жыл бұрын

😊🙏

Extremely good explanations. Thank you.

@sambenyaakov

4 жыл бұрын

THANKS

i have been going thru power electronics material since 2018. this is best I have seen

@sambenyaakov

4 жыл бұрын

Thanks for taking the time to write the comment.

Thank you Prof. I have learn a lot from this tutorial video.

@sambenyaakov

2 жыл бұрын

Thanks

by far the clearest explanation i have encountered in video or text . it is very much appreciated

@sambenyaakov

6 жыл бұрын

Thanks for comment.

Great class, that was a great explanation! Thank you.

@sambenyaakov

3 жыл бұрын

Thanks.

Thank you for the content. very insightful and Intuitive.

@sambenyaakov

2 жыл бұрын

Thanks.

Thank you very much professor. This is a great video and has helped me to understand my textbook a lot better.

@sambenyaakov

4 жыл бұрын

Thanks.

The Best Explained.Thank you, Sir.

@sambenyaakov

3 жыл бұрын

Thanks

amazing lecture. great insight, I learn a lot from you, thank you

@sambenyaakov

3 жыл бұрын

Thanks for kind note.

wonderful job, professor

@sambenyaakov

3 жыл бұрын

Thanks

Excellent lecture. Thank you for your time in clearing out many doubts surrounding inductor voltage/current behavior.

@sambenyaakov

2 жыл бұрын

Thanks for note

Excellent explanation. I love your lectures.

@sambenyaakov

3 жыл бұрын

Many thanks!

Very basic and important concept with well concise explanation!!

@sambenyaakov

7 жыл бұрын

Thanks for comment.

Thanks, you are an excelent teacher !!!!

@sambenyaakov

2 жыл бұрын

Thank you! 😃

Excellent explanation, you are a very good professor.

@sambenyaakov

3 жыл бұрын

Thanks

I am an amateur exploring electronics. I could understand how it worked.. Thanks.

@sambenyaakov

3 жыл бұрын

Thnks for taking the time to write the note, I am happy to learn that the video helped.

Very clear explanation, thank you.

@sambenyaakov

4 жыл бұрын

Thanks for comment

Thank you. Excellent explanation.

@sambenyaakov

5 жыл бұрын

😊

thanks again very well explained and well worth the time

@sambenyaakov

3 жыл бұрын

Thankls

Interesting and very well explained.

@sambenyaakov

7 жыл бұрын

Thanks!

So educative and future life skill

@sambenyaakov

3 жыл бұрын

Thanks

Hello Sir, really great video. Thank you very much!!

@sambenyaakov

3 жыл бұрын

👍😉

شكرا يا سام بن يعقوب

@sambenyaakov

3 жыл бұрын

תודה

Very nicely explained, Prof Ben-Yaakov. A request to please arrange your english videos in the form of a playlist (similar to the hebrew ones) so that we can view more of them! Thanks again, clearly explained.

@sambenyaakov

Жыл бұрын

Noted

So helpful! I'm taking my own notes when going through this lesson I'm sure when explaining that he is waving and circling on his drawing pad and there is no indicator on the screen to show which part he is talking about 😂

@sambenyaakov

3 жыл бұрын

Sorry, in this particular video synchronization to pointer/pen is corrupted.

Thank you for these courses

@sambenyaakov

5 жыл бұрын

Thanks. If not a memeber please join www.linkedin.com/groups/13606756/

Dear professor, Have you ever made a video about buck converter in discontious conduction mode?

Excellent lecture

@sambenyaakov

7 жыл бұрын

Thanks.

Thank you for great video, do u have a website where i can quickly refer notes in video?

Thank you! That was great.

@sambenyaakov

6 жыл бұрын

Thanks for comment.

awesome tutorial! If at the end you can talk about the ripples at the capacitors and what are the contributing factors that would complete everything

@sambenyaakov

4 жыл бұрын

Iדמ,א ןא גןבודדקג שא kzread.info/dash/bejne/eqiry6uCgMjRltY.html

very helpful. thanks

@sambenyaakov

Жыл бұрын

Thanks

Thanks for the explanation. I wish you would have covered the DCM, just as you did in the buck converter.

@sambenyaakov

4 жыл бұрын

Good point. Thanks.

@PlayboyHZ

4 жыл бұрын

@@sambenyaakov I will definitely subscribe. I just have one question, which is related to converters in the discontinuous conduction mode. Would you ever want to operate a converter in DCM? Does it give any advantage for certain applications? Thanks, best regards

@sambenyaakov

4 жыл бұрын

There are advantage running Flyback at DCM . See www.linkedin.com/feed/update/urn:li:activity:6671448579661529088

Thank you Prof. Ben-Yaakov for the excellent lectures. I have been following them and they have been very helpful. Just a question on this lecture: at 3:17 when you showed the real LR circuit. You explained that the decay of current will be exponential. Shouldn't the rise of the current be also exponential? In your diagram however the current has a constant rising slope. Is there anything I am missing here? Thanks

@sambenyaakov

3 жыл бұрын

Good point. You have a keen eye. I should have explained it better. When the battery is connected and duration is short you are at the beginning of exponential which is approximately to straight line. The discharge section should have been longer. Thanks for pointing this out.

@muntu2008

3 жыл бұрын

Thank you very much for explaining this point👍🙂.

very nicely explaination

@sambenyaakov

4 жыл бұрын

Thanks

Splendid

@sambenyaakov

Жыл бұрын

👍🙏

thank you ~~ greet from China

@sambenyaakov

7 жыл бұрын

Thanks.

Thank you Sir!

@sambenyaakov

3 жыл бұрын

You are welcome!

Hi professor, first, thank You for sharing very educational video where we can get back to basics analysis of a electrical circuits. Probably one of the best video I could find so far of this subject and since You have many more of them I decide to subscribe on the channel. But I would like to ask some question which troubles me. Maybe this comment section is not quite appropriate for it, but still I will ask since it's troubles me and I would like to have better understanding. It is about constant voltage that is often shown across inductor in fast switching circuits like buck convertor. In my head I have a physical picture that as soon as inductor is connected on constant voltage source it will start to build magnetic filed and the voltage over inductor will exponentially dropped almost to 0 value. Of course, during short period of time this drop won't be huge, but still voltage is not quite constant during that short switching period. My problem is fit this picture into the model of fast switching circuit where the voltage over inductor is presented as constant voltage which imply linear current rise or drop. Could you please help me understand why we can assume constant voltage on inductor in a short periods of switching?

@sambenyaakov

3 жыл бұрын

HI Marko, thanks for interest. An inductor does not control the voltage across it when connected to a voltage source. It will comply with any voltage and adjust dI/dt. (similarly, a capacitor will not control the current when connected to a current source). You can write to me at sby@bgu.ac.il

@madhavrabinbipin2116

Жыл бұрын

I had also thought about this.Usually why Vl is a constant is prolly because the Vo is treated as constant.The possible explanation I can think is that 1)once the circuit reaches steady state , the capacitor say charges to some voltage.The natural time constants involved like RC,LC etc are very large compared to switching time.This implies that capacitor discharge is very less over a switching cycle , hence Vo is almost constant 2)In terms of frequency domain, the Inductor passes lower order harmonic currents(as its impedance is jWL, it offers more impedance to higher harmonics) and the higher harmonics among these lower harmonics itself are mostly absorbed by The filter capacitor as they absorb higher order harmonics easily.Hence the current which passes to the Resistor load is almost dc current (and hence almost constant) due 'a kind of 2-stage' filtering of higher harmonic currents by inductor followed by capacitor.

Dear Professor, you have an amazing talent to teach these topics. It would be great to follow your lectures in an order. Is there such order or link or are these random uploads? I saw your lectures in Hebrew are in order but couldnt figure out the English ones. And one question: in simulations a linear voltage regulator at the output of a dc dc converter or smps attenuates the differential switching noise a lot. Is this way also used in practice? I tried LC cascaded by a linear voltage regulator at the output of a noisy ripple voltage source and was amazed with he result. Would be glad if you have comment on it.

@sambenyaakov

5 жыл бұрын

Thanks. See index at www.advicepoweracademy.com/video-tutorials Yes, LDOs are used successfully in low power applications.

Please confirm that the load in the final example ( 31.23 min) is 5V/10A= 0.5 ohm. Time constant is L/R 1.2microH /0.5 ohm= 2.4 micro Seconds to 63% of peak. So frequency should be about 300kHz ( not 100kHZ) with a duty cycle of 0.5. Only correct if you ignore the capacitor. Where have I gone wrong or am I completely wrong

@sambenyaakov

2 жыл бұрын

WE assume a large cap so the output is like a battery of 5V.

Great explanation! Keep on! :-)

@sambenyaakov

7 жыл бұрын

Thanks for comment

Very good lecture

@sambenyaakov

5 жыл бұрын

😊

wonderful explanation Liked + subsribed! thx ❤

@sambenyaakov

9 ай бұрын

🙏👍

Hi, Professor I have a question. The waveform of current of an inductor at the second slice, it should be pass through origin. Why doesn't it pass through? In the beginning, iL(0) = 0? It that wrong? Thank you so much!

@sambenyaakov

6 жыл бұрын

THis is a general case (as you will find in a PWM converter) in which the initial inductor current is not zero.

@user-pn9be1zt7n

6 жыл бұрын

Thank you for your feedback. ^ ^ I knew that it's the steady -state result. The current camp of an inductor would act like that, when converter goes to steady- state response with a fixed switching frequency. So, if we talk about at very beginning, which means I turn on a dc source at the first time, the current of an inductor should rise from zero amp, and after the system goes to the steady state(after several cycles), We just see the common waveform(general case) in the slide. Is that right? Thank you so much.

Thank you sir

@sambenyaakov

3 жыл бұрын

Thnks

I love you professor

@sambenyaakov

5 жыл бұрын

😊 If not a memeber please join www.linkedin.com/groups/13606756/

Great

@sambenyaakov

Жыл бұрын

🙏👍

Thank you so much, sir.please make a video on capacitor behavior as well.

@sambenyaakov

6 жыл бұрын

Hi Prince, see my channel for capacitor related videos such as switched capacitor converters and voltage dependent capacitors. .

@Praveen1991917

6 жыл бұрын

Sam Ben-Yaakov thank you sir

Thank you

@sambenyaakov

Жыл бұрын

You're welcome, Thanks

Dear Mr Yaakov The video is very clear and helpful thanks a lot , but I have a question do you have more videos ?

@sambenyaakov

6 жыл бұрын

Look for Sam Ben-Yaakov channel on KZread

Just loved the explanation 🙏... Thanks for educating the world 🙏👏 Only the sudden introduction of DCM is little confusing to me... I couldn't understand how for the same circuit both CCM and DCM concept came.. please clarify

@sambenyaakov

2 жыл бұрын

Please indicate the relevant minute in video

Very nice video sir but my doubt is, what should be the critical (max) value of the load resistance for CCM operation?

@sambenyaakov

8 ай бұрын

The answer is here kzread.info/dash/bejne/eqiry6uCgMjRltY.html

Why current across inductor increases linearly instead of being exponential with time? Is it because of constant Vout?

@sambenyaakov

2 жыл бұрын

Two reasons: vout is approximately constant voltage and the resistance of L is low so the time constant is very long and we are are just at the beginning of the exponential curve

What if I have an output power instead of current , in my case it's 5 watts. Do I use Vout/R as my Average to find the minimum inductance?

@sambenyaakov

6 жыл бұрын

Yes, but R for the maximal expected.

@nibzlegend99

6 жыл бұрын

Thank you sir for the reply. Can you give me tips on how to approximate the values for R , C and L. I am trying to simulate and build an open loop buck converter, stepping down 25 volts to 15 volts. Can you give me tips ? How can i choose a capacitor that would guarantee me a ripple voltage of less than 0.5%? Appreciate your sir most useful video I found on youtube on Buck converters is your video

@sambenyaakov

6 жыл бұрын

First thing is to choose the frequency and decide on current ripple of L this gives you the value of L. You choose then C for desired ripple voltage given the ripple current. Good luck.

@nibzlegend99

6 жыл бұрын

Ok sir, I have found another formula similar to your formula for approximating C minimum. The problem is both use Ioutput which I am not given in my design problem. Instead I was given Poutput to be 5 Watts. I found out the resistor rated load value by P = Voutput^2 / R and got a certain number for R. Then I used Vouput/ R to get the value of I output. I am not sure If I did the right steps to get I output. But many values rely on it and It is cruicial that I get it right. Could you tell me if this is the right way to compute it? Appreciate you sir

thankyou...

@sambenyaakov

2 жыл бұрын

Thanks

professor do you mean the the DC current goes to the resistor and the AC goes to the capacitor?

@sambenyaakov

2 жыл бұрын

Yes. No DC via capacitor. Resistor will have some AC current depending on ripple voltage.

Hlo sir,good explanation. I have a doubt why we are drawing inductor (i min to max)and capacitor (-ve side onwards)charging waveforms

@sambenyaakov

9 ай бұрын

It a convention; in Germany they do it differently

Hi, i have problems understanding which minimum value of capacitor i have to use, thanks and excelent video.

@sambenyaakov

4 жыл бұрын

Voltage ripple and loss (due to ESR) are the limiting factor

Sir do you have a video about Full bridge DC-DC converter ?, or could you please recommend to me a book with a lot of exercises about Power electronic ( AC-DC, DC-DC, DC-AC) thank you for the videos

@sambenyaakov

6 жыл бұрын

Thanks for comment. There are good power electronics books. I am not sure which include exercises.

@anant814

6 жыл бұрын

Power electronics by D. Hart, Fundamentals of Power electronics by R.Erickson, Elements of Power electronics by P.T.Krein

Dear sir your lectures are excellent.I would like to listen all lectures regarding converter design,but I couldn’t find lectures in sequence,kindly suggest me Where can found all these lectures in sequence. Thanks a lot sir .

@sambenyaakov

Жыл бұрын

Sorry, they are not arranged. You can search in the KZread search box for a given subject e.g. " Sam ben yaakov control"

Dear Sir when the switch is Open, the charges from output capacitor wont flow through Load,R? If it does then how does the output voltage remain constant as charges stored on capacitor are that from ripple? I am confused about capaitor role

@sambenyaakov

6 жыл бұрын

I am not sure I followed you question. The role of the output capacitor is to keep attenuate the ripple so the load sees a DC voltage with some ripple on it. In a CCM Buck the inductor current always flows to the output. Does this answer your question?

@crestedeagle4740

6 жыл бұрын

Thank you sir for your response. When switch S is opened, the inductor tries to maintain the current and therefore provides current to the load. The same way charges are also stored on capacitor, will the capacitor try to discharge itself through load aswell? what happens to the charges on capacitor? Because I watched a video where it was stated that the capacitor grounds the high ripple current, the term grounding was quite ambiguos to me. Can you please shed light on what happens to capacitor as regarded to the charges on it?

@sambenyaakov

6 жыл бұрын

At steady state, the average inductor current is equal to the load current while the inductor ripple current is passing through the low impedance of the capacitor which is "shorting" it. This is why the ripple voltage is low.

@crestedeagle4740

6 жыл бұрын

Thank You sir :)

I used the voltage forcing current equation in a presentation. I felt good about it. The audience was a little lost.

@sambenyaakov

Жыл бұрын

Why? Thanks for sharing.

@intheshell35ify

Жыл бұрын

@@sambenyaakov its the end of the semester. The kids have other things on their mind and didn't really share my excitement about why the current through the inductor doesn't have an exponential slope. That's ok, I'm excited enough for all of us about V/L forcing dI/dt and vice versa.

@sambenyaakov

Жыл бұрын

@@intheshell35ify 😊😊👍👍

WHAT IS the effect of entilrely removing the inductor ....the rule of vout = d* vin is still completely valid even if no inductor exist ??? or just the inductor ensures large amounts of current supply ??

@sambenyaakov

2 жыл бұрын

Without the inductor there will be no regulation The output cap will be charged to input voltage

@kotarakotara236

2 жыл бұрын

@@sambenyaakov dr as if you stating that as long as we run our converter in the continous mode we wont need regulation (ices and feedback networkds) as it can be done by the inductor(with proper design ) ?

great

@sambenyaakov

4 жыл бұрын

Thanks

Excellence good explaination Great !

@sambenyaakov

7 жыл бұрын

Thanks for comment. I appreciate it.

thanks

@sambenyaakov

4 жыл бұрын

👍

Hello Sir, I have question In the Buck convertor , If Inductor value is more than calculated value what will be impact on Vout? For example: calculated value is 68uH and I will use 300uH Inductor.

@sambenyaakov

3 жыл бұрын

In general, there is not much change as far as voltage regulation. But: on the pro side: ripple will be lower. On the con: slew rate will be slower (the ability to ramp up the inductor current in case of large load change)

@srinivasuv4436

3 жыл бұрын

@@sambenyaakov hello Sir, thank you very much for answer, sorry for the late reply.

Can we give input to buck converter through a battery

@sambenyaakov

2 жыл бұрын

Sure

@Naushadkhan78623

2 жыл бұрын

@@sambenyaakov thank you sir i want to give input from a 150ah battery, is it safe sir

Dear Professor, can this be another explanation of negative spike? This is before the buck converter explanation. " since inductor current can't change instantaneously. So current will continue to flow and keep on sucking charge out of the right side of the switch node. So the switch node will see a negative spike."

@sambenyaakov

6 жыл бұрын

Hi Abhishek, please send me the time coordinate (minute) of the location you are referring to.

@abhishekdwivedi556

6 жыл бұрын

Sir, I was referring to time around 9:00 minutes.

@sambenyaakov

6 жыл бұрын

"keep on sucking charge out of the right side" Current can flow only exist in a closed loop.

@abhishekdwivedi556

6 жыл бұрын

But sir, as you explained , assume some imaginary resistor, which is actually not present. So I think current can't flow. Then I don't understand it intuitively. Mathematically since di/dt = towards minus infinity so Voltage across the inductor will also be towards minus infinity.

@sambenyaakov

6 жыл бұрын

The mathematical explanation is is V= L dI/dt/ The intuitive is indeed the the inductor's " attempt to keep the current flowing. I was somewhat uneasy by "sucking charge" since it has the connotation of just charge moving while we need to look for the current loop.

Sir, could you send text book pdf or link written by you on design of dc dc converter

@sambenyaakov

Жыл бұрын

Sorry I have no publications other than papers that you can search in IEEExplore.

Can u explain the working of capacitor in buck converter

@sambenyaakov

4 жыл бұрын

kzread.info/dash/bejne/eqiry6uCgMjRltY.html