{284} RCD SNUBBER Circuit | What is Snubber Circuit in SMPS and How to Calculate
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- เผยแพร่เมื่อ 30 ต.ค. 2020
- in this video i explained What is RCD snubber circuit, why it is used in smps switch mode power supply circuit & how it works in high frequency transformer in switch mode power supply. circuit is explained in english language. Educational tutorials on power electronics RCD (resistor capacitor diode SNUBBER Circuit | What is Snubber Circuit and How to Calculate | Explained in Urdu. during switching the high frequency transformer the voltage stress on collector of the mosfet or transistor is double to the vdc and Leakage inductance spikes are also increase, these can be minimized by addition of a snubber circuit (a capacitor, resistor, and diode combination) connected to the transistor collector to positive supply line. it damps the oscillation effect in the off time period of the switching cycle. in this way the the reverse voltage generated in off time are diverted to this RCD snubber circuit so the voltage stress is minimized and the huge power loss in fall time is reduced to a negligible value.
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You know why your channel is so underrated? Its because you explain so complicated topics that most of the people are not able to understand it, but in reality your channel is really real gold!
please accept my best regards and special thanks for your golden words
actually my most of the videos are questions from my viewers
I take care for their questions
I have still thousands of pending questions so far which are to be addressed
and their answer is still not available at Google or TH-cam. if there is something that is not satisfactory
@@HaseebElectronics your work is really awesome and ur educating to person in need. So kindly carry on your work and u will get the credit for ur work in future.
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Kindly share your contact number
U are an experienced professional teacher. What u are doing is a legacy. Pls, kp it up.Thank u, sir.
it is my pleasure. i am just sharing my experience, so that it may be helpful for someone
please accept my best regards for your valuable feedback
جزاك الله خيرا وزادك علما وعافية
Assalamualikum boss, Alhamdulillah for present a verry useful lesson.
I wish u were my teacher at the university.
AWSOME, thank you.
best regards
You have explained the snubber circuit very well and also shows how to calculate the snubber cap and resistor. You can improve the rating by reducing many repetitions👍👍👍👍. This will make it lot more watchable.
The info you offered i was searching for them so many years, thank you for sharing your knowledge, really appreciate
Thanks a lot for your valuable words 💞
Resp Sir! Dhanyavaadh Sir. -- ChinnaRao Paderu Andhrapradesh
Sir,many many thanks. You are great .
Good tiching karte hai 👌👍👍👍👌👌👌👍👍
thanks a lot
Thank you for information. Greetings from Turkey. 😊👋
best regards
Lk 174 😊😊👍👍👍
Ad one of 2 full watched
Without skipping 😊👍👍
Super diy video Haseeb.
best regards and special thanks
Keep up the veeery good work man! I learned everything i know about smps from you!!!
Thank you very much again. I've found empirically that we just divide by 6 the value of power disipated without snubber circuit to know the amount of power dissipated using it.
I always learn something new from your videos.
Thanks Haseeb!
👍
This is probably the best explanation of snubber circuit!
Thank You!
thanks a lot
Very nice and informative sharing 👍
I would dare to say this is the best explanation about this topic i've ever studied.
Great Explanation Sir. Such kind of video is very very helpful for me.
Nice video sir, I was in confusion about snubber ckt.but now my total ideas r cleared.you are having proper knowledge of electronics.you studied hard for this.God bless you.
best regards and special thanks
it is my pleasure that my efforts are helpful for my viewers
Thanks for explanaition. Perfekt
best regards
Groovy vibes all the way! Big 👍🏻 up my friend. See you aroud
The best explination on the Internet. Super helpful.
best regards
Thanks you sir, a good video.
You are welcome
Very good
thanks a lot
It's a very informative video, thanks for sharing it
Nice explanation as usual, I always learnt something new from your videos hence watching repeatedly and each time get something new.
May Almighty ALLAH reward you thanks
Asalm aliykum bro
Very good information sir thanks
Beravo 3elik akhi mowaf9
شرح ممتاز واضح جدا
A very interesting explanation.
Great upload 👍
Ma sha Allah thanks for giving this valuable knowledge
Still watching 👍
Jana'meal
Very clear explanation, thank you
Hai sir,
It was awesome explanation and I have four questions.
1.for peak current calculation formula where 3.13 value is come from?
2.is (tf) value is given in datasheet r how we knw DAT (tf)value.
3.last formula for transistor wattage where 6T is came from?
4.In which way the resistor will discharge the charges at transistor "ON Time"
These are my question please give sir to these question to complete this topic sir...
Same I am also not understand this values please guide
Tf is the delay in fall time which is from datasheet and watch once again video to know how does the capacitor discharges during transistor ON time.
But I still did not get answers for 1st question and 3rd question. Here I have added another question.
5. In the formula R1 = Ton_min / (3*C1), What is 3? Are 3.13, 6T and 3 assumption? If yes, what is the base for these assumptions?
Only Haseeb can answer these questions
Very well explained and beautiful presentation with details shown. Thanks for sharing bro. Keep it up.
Good work sir
Nice information video
Thanks for the video and especially the effort you put to share your knowledge
14 like
Good job
Great update
Super
👍👍👍👍👍👍👍👍👍✋👌
Apke k es hard work k liye
Apke har video k liye thank you so much sir
MashaAllah very nice uploading👍
Stay blessed stay cnnctd🤝👍
Best video on snubber s.
Thanks for your efforts.
Keep up the good work.
special thanks dear Manjit.
best regards
This class will be my study material . thank my brother.
Assalamualikum. Excellent. Thank you very much for making people understanding very easily. Also Thanks again for your hardworking on behalf of making the video from start to published
You are most welcome
best regards and special thanks
Simply to the point ! I liked it very much dear friend ! It helped me a lot. Thank you !
Great work sir.
Very useful topics. Thank you for the clear explanation..
You are welcome
Assalamualaikum dear brother.MashaAllah very useful and knowleadgeble Upload.Thanks for sharing your valuable knowledge.Allah bless you.
Спасибо, за прекрасный урок и понятное объяснение!
добро пожаловать и особая благодарность за ваши ценные слова. оставайся благословенным
If I understood correctly, in flyback, instead of a doubled input voltage at the time of closing the transistor, there will be a reflected voltage + a self-induction voltage of the dissipation inductance?
Thank you my teacher for this more information I'm happy because this class helped me very much.
Your method is Amazing.
best regards
Awesome video thank you very much
Good morning bhai . very useful and informative video
Excellent explanation, respect from Romania.
Many thanks! and best regards
Good explanation!
Long time my friend, you are the best and your channel is doing so well, thank you for visited back, will continue to support each other. Please stay safe
You're great sir, thanks.
I am also from electronics field but this type of explanations still not found any books thanks for very useful information 👍👍👍😁
Very beautiful, artist👏👈👍
Thanks for a very clear explanation which was easy to understand.
You are welcome!
1st like
NYC tutorial my friend 👍🏻👍🏻👍🏻👍🏻👍🏻
Great explanation sir... Keep it up.. Thanks🙏
Thanks and welcome
👍🙏 god bless u
thanks a lot
stay blessed
Thank you sir this video it very useful
Thanks for posting this video.
You're welcome
Hi Haseeb,
Are you still checking the comments? If yes, Could you answer the following questions? . Answers to these questions will help so many of your channel followers like me.
1. How did you consider 3.13 in the Ipeak calculation?
2. How did you consider 3 in the R1 calculation?
3. How did you consider 6 while calculating transistor power dissipation after adding snubber circuit?
The explanation of the circuit and calculations are awesome
Reply about the 2, the voltage in capacitor is reduced almost to zero after three times time constant (3RC), because U*e^(-3) and the energy of capacitor in RCD is expected to release over during T_on.
Reply about the 1, 3.13 should be related to topology of the circuit, only if you can calculate the I_pk and take some margin into account in your applications, the reason about the value, 3.13, can be ignored.
Reply about 3, the value, 6, may be empirical resulted from various experiments in their company.
Thank you for the fantastic video, it was very informative and well presented and now I understand what a snubber circuit dose and how and where to use one 👍
Do you have videos explaining any types of circuitry other then Smps?
Very good sir
Thank you so much sir your video helped me understand this snubber network concept very easily, the only calculation part whr i stuck was the last formula where you calculated the pd with rcd snubber which came to be 1.38 Watts, i just wanted to know why we multiplied the T by 6 or to be more precise where the number 6 came from in formula.
You're professor!! You should teach in University. Very clear and understanding the concept well..
please accept my best regards and special thanks
Like very nice so beautiful good wake 👌👌👌😍😍❤️❤️
Nice explanation, thank you🙏💕
i am thankful
plss sir make a vids about those capacitor on primary ground and secondary ground /hot and cold
Yes i would also like to watch a video about the coupling capacitor which links the hot and cold ground
السلام عليكم ورحمه الله وبركاته أخي الكريم احلى بصمه بتوفق ونجاح دائما
اكثر من رائع...شكرا لك استاذ جزاك الله خيرا على اسهاماتكم....
thanks a lot dear brother
Think you so much great dear brother...
Great video my friend! What am I saying. Another Great video!
Good Morning & All The Best My Dear Brother
شكراً جزيلاً على الشرح الرائع
thanks a lot. stay blessed
Thanks for the explanation.
In an atx power supply, I found the mosfet short and diode blown. I guess it's the diode from the snubber circuit.
For replacing the diode is there a special requirement like fast recovery, amp rating otherwise they get shorted again?
Why did the diode go short in the first place?
great! thanks
You're welcome!
thanks, master
Perfect 👌
thanks a lot. stay blessed
awesome your my idol
@@HaseebElectronics ty sir i want to know about smps pls i will keep sharing your vids
Hello Sir, I am grateful for your explanations, Please can you do a video about the capacitor (ground decoupling capacitor). precisely, the purpose of that capacitor which links cold and hot grounds and how we can troubleshoot its failure
@@HaseebElectronics Thanks Sir in advance, precisely the capacitor connecting the auxiliary winding ground(hot) to the cold ground
Explendid and clever explanation .Very practical as well . Congratulations ! Since my application is based on a 200v , H bridge IRF740 at very low frequency( 0,3 to 1,5 Hz) following your steps I've got 1,23 uF and 0,54 ohms for 3,13 A Ipk .(Hope it is correct ...) but how the RCD should be wired to the two lower mosfets ?
Chokran 🇩🇿👍
36 great uploading bhai 🙏
123👍
Impressive teaching regarding modern technology
thank u sir
thanks a lot
Extremely very good explanation about this topic. in fact, the best one I've ever studied. Can I ask your opinion, since I've seen simulations where when using 12 Vdc of power source voltage, they have measured up to 2500Vdc of spikes, can a such low power source produce such a High voltgae spikes in a coli? I'd appreciate your suggestions. Thank you.
best regards and special thanks
yes
if snubber circuit is not used, these spikes might reach at this amplitude due to winding ratio, reverse emf, switching topology, load, leakage, core permeability
so the voltage stress spikes may reach at this level
@@HaseebElectronics Thank you for taking your time to help and respond. God Bless you.
Very nice explanation ! How do you select the diode type in this case ? Based on I peek = 0.85 A and diode response time ?
Ipk=(3.13 *Pout)/Vdcmin where does 3.13 come from? and in the part of calculate power dissipation how can i find Tf value?
Asalam Aalaikum
It has been so long, I was following you silently, be blessed for your initiation you made of teaching us, you are amazing teacher bcz most of every thing I know about flyback converter it is bcz of you, thx for this, but I want to ask you a favor of clarifying fall time (Tf) you said in this tutorial (284) snubber circuit, you said that MOSFET used in that example has 0,3us of fall time(Tf) after I tried to read more than ten datasheet then I realized that there is no MOSFET with fall time of that range, I saw instead delay fall time(Tdf) may probably be in that range.
So, I want to ask if you may give us again some other clarification if that 0,3us of that MOSFET was Td or Tdf?
Be blessed, thx.
Sir do a video for ac line filter calculation for smps design
انا عربي وخلال بحثي عن هذه المواضيع في اللغة العربية، قد اجد اشخاص مختصين يتحدثون لكن لا يعطونك الاجابة الصحيحة الواضحة التي وجدتها هنا
السلام عليكم و رحمة الله و بركاته
لله الحمد والشكر
اخوكم محمد اشرف
Asalam Aalaikum
It has been so long, I was following you silently, be blessed for your initiative you made of teaching us, you are amazing teacher bcz most of every thing I know about flyback converter it is bcz of you, thx for this, but I want to ask you a favor of clarifying fall time (Tf) you said in this tutorial (284) RCD snubber circuit, you said that MOSFET used in that example has 0,3us of fall time(Tf) after I tried to read more than ten datasheet then I realized that there is no MOSFET with fall time of that range, I saw instead delay fall time(Tdf) may probably be in that range.
So, I want to ask if you may give us again some other clarification if that 0,3us of that MOSFET was Td or Tdf?
Be blessed, thx.
وعليكم السلام ورحمة الله وبركاته
the tf (fall time) or tdf turn off delay or td or td(off) or time delay falling edge (tf) have the same
the example in that tutorial was just to give the concept
we must have to follow the datasheet for exact calculations
so greattttttt.thanks master i have a problem 🙏🙏🙏.please answer.my resistor why is been destroyed.
increase resistor value. and may be it is low wattage resistance than the required wattage.
check diode in series as well
check capacitor as well
Hi sir
Please can you make video on bridge rectifier smoothing capacitor capacitance value and also smps output capacitor capacitance value calculations