Lecture 1: Introduction to Power Electronics

MIT 6.622 Power Electronics, Spring 2023
Instructor: David Perreault
View the complete course (or resource): ocw.mit.edu/co...
KZbin Playlist: • MIT 6.622 Power Electr...
The primary function of power electronic circuits is the processing and control of electrical energy. This class discusses the history, evolution, needs, and goals of power electronics.
License: Creative Commons BY-NC-SA
More information at ocw.mit.edu/terms
More courses at ocw.mit.edu
Support OCW at ow.ly/a1If50zVRlQ
We encourage constructive comments and discussion on OCW’s KZbin and other social media channels. Personal attacks, hate speech, trolling, and inappropriate comments are not allowed and may be removed. More details at ocw.mit.edu/co....

[@mitocw]

MIT 6.622 Power Electronics, Spring 2023 Instructor: David Perreault View the complete course (or resource): ocw.mit.edu/courses/6-622-power-electronics-spring-2023/ KZbin Playlist: kzbin.info/aero/PLUl4u3cNGP62UTc77mJoubhDELSC8lfR0 The primary function of power electronic circuits is the processing and control of electrical energy. This class discusses the history, evolution, needs, and goals of power electronics. License: Creative Commons BY-NC-SA More information at ocw.mit.edu/terms More courses at ocw.mit.edu Support OCW at ow.ly/a1If50zVRlQ We encourage constructive comments and discussion on OCW’s KZbin and other social media channels. Personal attacks, hate speech, trolling, and inappropriate comments are not allowed and may be removed. More details at ocw.mit.edu/comments.

[@enisten]

The course link seems to be broken.

[@swenic]

@@enisten Works for me

[@enisten]

@@swenic Yeah, it works now.

[@robertlackey7212]

Power electronics are a band aid to keep a dangerous and no longer logical system going.

[@doomer_woejack]

Can you please include the names of textbook recommend by professor for this course I cannot find those names into OCW portal

[@opiwahn]

It's really remarkble these days, when you are able to watch first class educational lessons done by an MIT professor for free. Thank you very much for sharing this content!

[@juanpedrosantiago]

Knowledge is free, diploma is expensive.

[@user-yk1cw8im4h]

Such an original comment

[@user-pd9ju5dk5s]

dont sweat it, homie

[@batman_2004]

Kudos for such an original comment. 👏

[@colleenforrest7936]

The origami class is a good one too. A little dated, but fascinating

[@MrSomethingdark]

Whoever made the move to publish this deserves a Nobel peace and environment prize. This is what humanity should feel like. Free!

[@GSDKXV]

Power to the people. I want to build trees so that others may enjoy its shade.

[@veganath]

@@GSDKXV none of the dated historic socioeconomic models will be relevant in a resource abundant AI directed future animated with power electronics if & only if we use such technology for human, animal & environmental concern...

[@Splarkszter]

​@@veganath AI directed. Gosh, stop eating the markething mumbojumbo.

[@veganath]

@@Splarkszter curious would you take a commercial flight if you knew the pilots were in full control, i.e. they had no access to the inertial navigation system, no Doppler radar, no GPS, no autopilot...etc. My point is where technology is superior to humans in performing a task then it would be morally reprehensible in life or death situations to allow humans to be in control, especially driving vehicle like cars. yes human directed cars will be illegal in our near future

[@leopoldpoppenberger8692]

@@veganath I want to be in control of my being

[@Martin-yf5zk]

Am I dreaming?!! A 'FREE' electronics course from MIT! I swear this is what I call a miracle! There truly wonderful humans in this world. Thank you to whoever determined that this a great idea! Share the wealth of knowledge

[@labibbidabibbadum]

I used to watch these MIT OCW videos when I was studying engineering. They were a total blessing. I recall reading someone's comment that finding the video series was like finding $40,000 on a park bench.

[@BradleyLayton]

We do it because we're MIT.

[@labibbidabibbadum]

@@BradleyLayton Walter Lewin was pretty amazing ... even if you only counted what he could do with chalk :)

[@myhandle__]

Me too

[@VedanshSrivastava-zi2es]

00:14 Course logistics and assessment details 02:43 Homeworks and assessments have different collaboration policies 07:31 Power Electronics focuses on efficient electric power conversion and conditioning 09:45 Power electronics play a crucial role in a wide range of energy conversion systems. 14:20 Power electronics are essential for efficient and reliable energy usage from various sources. 16:47 Power electronics involves storing, transforming, and controlling energy for various applications. 20:50 Power electronics involves transforming DC voltage to other DC or AC voltages for various applications. 23:11 Using transistors to create a variable resistor for voltage division. 27:47 Efficiency is key in power electronics design 30:00 Introduction to Switching Function in Power Electronics 35:02 Filter blocks AC component and allows DC component to pass through 37:21 Ideal switches and LC filters are lossless elements in power electronics. 41:49 Introduction to switching power converters and the core of Power Electronics.

[@brucetenet6140]

🫡

[@simpleedge]

😊❤

[@a_bar8579]

The best educational institution in the world, and it still uses the old method of education...truly education is based on desire and love of knowledge.

[@FairyHyacinth]

Old method? Please explain...

[@a_bar8579]

@@FairyHyacinth yes it is old method because we life in 3d and virtual exist

[@Green_Expedition_Drgn]

It's not an old method. This is the basis of education and is not going anywhere. It's merely be expanded on. If a virtual 3d classroom is in the future, is that really that much different than in-person 3d?

[@a_bar8579]

@@Green_Expedition_Drgn Yes, the practical explanation in three dimensions is much clearer to the mind.

[@Eupolemos]

6:05 - Show begins :)

[@butupali]

Thanks. Looking for this

[@wheelfree]

This comment should be pinned at the top of sea of comments.

[@vikenemesh]

Thank you!

[@edenglish95]

​@@wheelfree Verdade perene❤❤❤

[@ibrudiiv]

I was half enjoying half dreading thinking about being back in college lol

[@pyro-millie5533]

Dude I’m self-studying power electronics for my current job! This is such a blessing to be able to access high quality educational content for free! Thank you MIT!!! Also, the professor seems to explain this stuff very clearly and insightfully. I’m looking forward to continuing this course!

[@danpedersen55]

This is great! I've been messing around with electronic circuits on a hobby basis for years, born in 69, I knew stuff !!! and learned stuff too. Not the last lecture for me, love it !

[@abrahamibukunoladeji3028]

Thank you so much! KZbin is indeed a free university.

[@sami_2119]

Thankyou very much MIT

[@gorak9000]

28:41 It's a "linear" regulator because the transistor is operating in it's "linear" region - it's neither fully on or fully off, and it has a linear transfer function from input to output at those conditions. It's the region you want to run in to amplify signals with no distortion, but terrible for doing power conversion

[@HermanWillems]

Terrible for power conversion but also terrible for amplifying signals as well.

[@realestalex2728]

All of this knowledge for free.Little nuggets like this is what keeps my faith in humanity going

[@josepha9313]

Watched out of curiosity and glad I did. I studied electronics in high school 1972-1976. We were still learning vacuum tubes first, then transistors. Integrated circuits of course existed but were not yet part of the curriculum. To this day I still remember Ohm's law, RC filters and the formula for calculating impedance. Hats off to this instructor, very straightforward and knowledgeable.

[@scythemachine1894]

what do you do now?

[@voice4voicelessKrzysiek]

Are you serious? This is my exact story! Ha ha!

[@getusel]

Finally MIT released power electronics course for the public.

[@NewWesternFront]

now when will they release their power electronics album?

[@getusel]

@@NewWesternFront this is it. Listen to it.

[@tseckwr3783]

thanks for the refresher. it has been 25 years since I took this course.

[@chanman5600]

35 years for me but I never practise electrical engineering as my professional because I switched to the environmental engineering.

[@GSDKXV]

@@chanman5600 why?

[@user-js6yn2hc5p]

Thank you, MIT. I am incredibly grateful for the tremendous effort to make high-quality education accessible to people all around the world! 🌍 At the end, I have a small request. I believe it would be fantastic if you could share the video lectures of the 6.011 (signals, systems & inference) class.

[@TCASAnalytics]

This is friggin AWESOME! Thank you, MIT, for being willing to offer this incredible opportunity to those without the means or opportunity to attend your campus!

[@tekvax01]

This instructor is an excellent teacher.

[@MIGHTYcbu]

From 18:41 he forgets an important goal, it is why we still use linear power supplies in stead of switched mode power supplies. SMPS, with their high frequency switching, are quite dirty in Electro Magnetic Frequency, both conducted and radiated. In i.e. lab or audio equipment that can be a problem. So, while less efficient and much bigger and heavier, SMPS are not the solution for all applications. Excellent course btw, he really narrows it down to the most basic components. Thank you for posting

[@ryangiggles]

Yeah. That's why he mentioned that linear regulators are covered in another course (which implicitly refers to a lower-level undergraduate course)

[@DannyWilliamH]

I'm an amateur electronics enthusiast (mostly repair, some design/engineering) and this is amazing. I definitely never went to MIT or warranted the ability to based on my academic performance on high school (lol). Thank you for these. This professor is very good at his job, btw. I'm about to binge all of these videos and then probably repeat them.

[@antikoerper256]

It doesn't get better than free lectures by MIT. It's like being there! And having the ability to learn FOR FREE, except from the convenience of whenever you're located

[@danvilela]

And, you can do it while taking a shit in the bathroom. That’s privilege bro!

[@jiaolong01]

Many thanks to MIT for release a non beginner course

[@HermanWillems]

This is pretty beginner?

[@mxb2432]

Thank you for sharing knowledge for free!! 👏🏽

[@gaelnea4871]

Thanks so much MIT, just please pay these instructors adequately. I know that college educators get screwed over a lot, and that a lot of them barely have any job security

[@alf5508]

These are really wonderful times we live in. Thank you very much !😁

[@charleswest6372]

Studied this in the 80s. SMPS - switching regulators. Used I consumer electronics-TVs, VCRs, Ham equipment. Now in everything. Very efficient like 80-90%

[@WACkZerden]

Thank You MIT... THANK you David Perreault

[@joe_ninety_one5076]

I just stumbled on this. I have no aspirations to be an electronic engineer but now understand the basic principles behing 'switch mode' and the wider implications power engineering. I can clearly see why this course will be so useful to many. From what I have seen, the MIT series looks like a remarkable contribution to humanity in general.

[@Armstrong1781]

HOLY I needed this so much specially bridge inverters

[@GianetanSekhon]

Thanks! More power to MIT for sharing these great resources with humanity.

[@georgendiga]

Am 40 in kenya, I have just started a course at M.I.T this is a miracle to me.

[@supa3ek]

When i did power electronics 30 yrs ago my lecturer told us the exam is 90% at the end of semester and if you show up before that good, but if you don't he doesn't care, your loss !!! And when you showed up for lectures he just straight up read from the textbook !!!! Oh and whenever you knocked on his office door, he was never there !!! Not MIT but a uni just as big !!! WOW things have changed 😀

[@Nexusion3]

A student asked the question "What is the efficiency of the power supply?" I'd like to point out that in the original circuit Mr. Perreault drew, it is shown that the power supply is 9v-16v which therefore necessitates the use of inductors, resistors, and power modulation to manipulate a more efficient supply. If the supply is 100% efficient then the subsequent use of the former devices wouldn't be necessary. This lecture was built on the idea that we can ideally achieve and perfect 100% efficiency. Mr. Perreault envisions a future in which we can implement limitless and losses energy conversion.

[@abhijeetkumar-de3xq]

I am so happy for this. Thank you MIT.

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@rafalklepinski7372]

Just stumbled on this, fantastic, love MIT OCW and this is exactly what I'm self-studying now. Thanks MIT for this, and all the other courses you've made available. Fond memories of Walter Lewin and all his physics lessons :)

[@Brainsucker92]

Thank you so much for sharing this! I absolutely love the idea of free education for everybody. I learned quite a bit just within these 45 minutes. This is awesome!

[@dangakong6304]

the internet i a wondeful thing. from complex RF technology, business studies, mathematics, physics, complex power electronics etc from these high quality institutions all for free. thank the creators of the internet.

[@anonymouscoward9643]

if i had access to this material and OCW 30 years ago, i would be a different person entirely. excellent presentation right out of the gate.

[@gold_apple_vn4657]

After 5 longsome days, KZbin finally knows and recommended me what is relevant to me and my passion!

[@madtscientist8853]

NIKOLA TESLA PWM LC TANK CIRCUIT 1mH in Serious 1mF pulsed at 1V at 630ms you can get up to 20 V out if you connect to the CAP.

[@jonsnow3513]

thank you MIT , love from Sri Lanka,

[@HighOnVoltageEN]

This is awesome!! Love your lectures @MIT!! The ones on quantum mechanics are just stellar, and these don't lag a single bit behind in awesomeness!

[@ajitnandakumar]

This is how teaching should be. The flow should be guiding the student's common sense.

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@null8363]

An amazing lesson taught by an amazing teacher from a remarkable university and everything for free, truly awesome and delightful )))

[@desertengineer1]

Excellent introduction. Obviously well done on an intro level. Hope some advanced topics are covered later such as Power Factor, pitfalls of using passive filtering (inductive saturation, capacitive inductance, leakage), and preservation of power return. Students going into our industry will need to understand the challenges of, for example, MIL-STD-704, MIL-STD-464, and designing to pass CISPR/EIC/MIL-STD-461.

[@sampathadikari6713]

Wow very valuable video playlist for me. because I am an Electronics and Telecommunication Engineering student. I am watching your videos from Sri Lanka. Please share more videos like this with us.

[@atharvnadkarni2353]

Thank You MIT I NEEDED THIS SINCE A LONG TIME. ❤

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@WeaselVaughn]

I've been using the old school OCW power electronics course notes as a reference for years. I'm so excited to see the coursework from the man himself! I've used that material to help with several designs.

[@hezronmawe-hn2uj]

Thank you MIT.

[@fifthavenue8505]

So happy, finally something fun to watch!!! Thank you!

[@GuillermoGuzman-nm8nb]

Your video contains valuable content suited for today's generation. congratulation sir

[@ChrisR]

Being able to pause the video and read the slides is helpful. I can imagine those in the lecture would probably want more time to absorb some of that information.

[@RG-qn2qm]

Automotive technicians learn all these concepts to understand vehicle computers and driving components........lovin it from Toronto Canada 🇨🇦

[@SUZAKU__007]

My teachers are just ppt readers. Thank you MIT for Uploading.

[@dennisdickinson8337]

Really like to see you go further with multiple power supplies on the grid ohm's law 102 and why you can only put in about 15% of the actual watts The missing 85% is overcoming the pressure of the line voltage

[@ashritsai3744]

Thank you MIT 😀

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@user-og1gg9qs8i]

why dont you make your own video platform indians everwhere like a virus

[@fnhirwa]

Was looking for a refresher on Power electronics and finally landed to this awesome course 😊

[@m.anasbaig]

Thank you so much MIT. It was much needed.

[@bdawg2513]

I took 2 years of electronics when I was in high school. This brings back memories :) I am now 50 so we are talking 32 years ago

[@tyrabjurman3584]

Ohh, thank you for this nice open courseware.

[@maxiandaur8509]

Thats so great, thanks MIT ❤

[@chuckmaddison2924]

When I started a course in the 80s, the lecturer said at the start, "Look at the person beside you. When you graduate, they won't be there "

[@SkyhawkSteve]

This looks like a fun course! ... especially when you aren't getting graded. 😃 I used to work with a satellite power system that was based on the Skylab airlock battery charger. It switched at audio frequencies, using bipolar transistors and only a few integrated circuits. It's amazing to consider how far switched mode power supply design has come since then.

[@ElizabethFert]

your approach to content is always refreshing and enlightening! ️

[@JBernhard72]

Great primer ... I made several capacitors "disappear" (ringing voltage) during my power electronics class

[@TheRealbenjibits]

Learned about capacitor ripple current specs pretty fast…

[@roscocsa]

My vocational school teacher threatened us with a 2x4 on the first day of class if we started any trouble. Learned a lot in that class.

[@edyt4125]

NO WAY IM SO FUCKING EXCITED FOR THIS

[@leandrorocha1215]

Excellent Professor, I am creating the Quantum Energy Harvesting System. Your class was helpful.

[@Epigonee]

THAT'S EXACTLY WHAT I WAS IN NEED OF thank you MIT!!! ❤

[@Danny-fs1hk]

I needed this video when I was in college, but that was 30 years ago. I dropped this EE grad level course cause it was too heavy but too many grad students. 😂

[@frankseidinger2112]

I come from a time when energy loss or saving was not a thing and therefore linear voltage regulators were the holy grail of power supplies. Also amplifiers and all kind of signal processing was analog at that time. It has changed much since then.

[@castlecodersltd]

Excellent. Thank you 🙂

[@noenemies98]

Where was this course when I needed it, I just completed Power Electronics last semester, but got a D+

[@wasiusulaimon1147]

Excellent introduction. Thank you very much.

[@gsmeeuwsen]

That was a REALLY great lecture, Sir!

[@amarjeeth123]

These are awesome videos.

[@graemetunbridge1738]

Love the giant prototyping board in the background.

[@trangpham-ck5jf]

Love it, finally I can learn something helpful for my degree

[@swrekcfest]

Incredible ! Just what I was looking for ! Thanks for all the knowledge 🤘

[@MWagner113]

Eddie Is going to love this "Power Electronics" video!! He will probably design a T-Shirt with a circuit diagram on it. Mike Wagner 😄🔌

[@Ek1Tyr]

Thank you!

[@DanOneOne]

I feel we need almost a separate lecture on how inductors work to fully appreciate this process.

[@Guishan_Lingyou]

You might want to check out MIT Physics II: Electricity and Magnetism 8.02x. It's on Walter Lewin's channel.

[@garyt1950]

You have a point there. Reminds me of ELI the ICE man and the shift in voltage and current between the capacitor and the inductor but knowing how these items work already made it easier to follow him. This is the first time in my life I have encountered such theories of power transformation. I'm stuck in my education from the standpoint of good old RF communications! I knew one engineer that went back to work in the digital world that used to say the reason they kept him around was that he was the only person that knew how to spell RF!

[@ahmadalkhatib1575]

What an excellent introduction to an interesting topic.

[@surajshukla6813]

Thanks this lectures means a lot

[@user-og1gg9qs8i]

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[@HelloMedicAnkit]

I ALWAYS WANTED TO LEARN ELECTRONICS AND FINALLY, HERE IT IS, THANK YOU SIR, I WILL BE FOLLOWING THIS WHOLE SERIES.

[@rty1955]

This video will NOT teach you electronics at all

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@Prabhu21]

Very informative and helped a lot in understanding my project in wearable sensors

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar

[@jeffreybell436]

Good old 10-050. I had a class there with Thornton.

[@BradleyLayton]

Epic times in that room.

[@florindocassessaatutu3109]

I don’t miss any mit class!

[@vikasithaperera8310]

An Excellent explanation ❤

[@sethdavidson4485]

Not a fan of the dismissive attitued at the Linear Regulator, hope thats a bit. The efficiency of Linear regulators is dependant on the voltage drop. A minimal voltage drop means minimal loss. They're great as a final stage after an SMPS because you can match up the stages so you get a nice clean vout from the regulator and most of the efficiency of the switcher.

[@armin_usa]

What an age we're living in , i can watch best quality courses of MIT for free while I'm scratching my balls in my room

[@samh-smith2931]

Im gonna watch this again.

[@PHDWhom]

First, we start with Luigi Russolo, the Italian Futurist Art movement, and the essay, "The Art Of Noises." Next, we fast forward to the mid 1970's, where noise artists like Boyd Rice and Whitehouse pioneered the musical movement known as "Power Electronics." Oh, wait, wrong channel?

[@discovery33977]

Thank you MIT

[@R67K]

Thanks a lot. For that!

[@RR-r1111]

Superb content👍

[@ramirosuarez9537]

Great speaker. Thanks for the course!

[@digitalkov]

I believe the STE was one of the first American car to have proper headrests for the backseats.

[@ayakalthumguia5404]

been waitin for this course for a long time, thank u sm

[@user-og1gg9qs8i]

saar saar dont redeem saar indiasupooper saar