How Alternators Work - Automotive Electricity Generator

How does a car alternator work? learn from the basics where we use the alternator and how alternators work. With thanks to Squarespace for sponsoring this video. Go to Squarespace.com for a free trial and when you’re ready to launch, go to squarespace.com/engineeringmindset and add code “ENGINEERINGMINDSET" at checkout to save 10% off your first purchase of a website or domain
Correction: 16:18 "Trasistor" spelling error. Should read Transistor.
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#engineering #electrical #automotive scotty kilmer bmw 550i

[@EngineeringMindset]

⚠️ *This video took a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕ PayPal: www.paypal.me/TheEngineerinMindset Channel membership: kzbin.info/door/k0fGHsCEzGig-rSzkfCjMwjoin Patreon: www.patreon.com/theengineeringmindset

[@franklincerpico7702]

Damn I love your videos man, so easy to follow and you make everyday things so fascinating.

[@DonaldSleightholme]

i invented a electric car with five wheels, use the fifth wheel as the alternator to recharge the battery but i don’t know if it would turn fast enough 🤔🚗🔋 the alternator would be on the road, it might drag the performance down 😐🤷‍♂️

[@LG5main]

i subscribed to your channel but i want to ask you something *why and how short circut happen?*

[@tintinfan007]

@@DonaldSleightholme better to use connect alternators to the engine instead of using fifth wheel just for that purpose

[@TheMaster5150]

I'll buy you a couple Starbucks coffee worth if you do basic HVAC ladder diagrams and schematic energized animations. Even a basic HVAC circuit board would greatly help engineers and HVACR tech's alike. Thanks for all your hard work in your videos Paul 🍻

[@Jaden-up3bg]

You've explained 3 phase way better than my robotics instructors! Good job!

[@EngineeringMindset]

Glad you liked it!

[@tintinfan007]

animatated videos are much better than chalk and blackboard

[@electronresonator8882]

now that's electrical engineering

[@chimeragaming56]

@@tintinfan007 agree i now fully understand what happens on them besides the fact that they make power. lol

[@academiaengineering5136]

Same. Why you need school when you have “The engineering mindset” KZbin channel

[@dv.singh97]

OMG!!! No words. This 18-minute video is way too much informative than my 2 years in high school. Never thought electricity could be this much fun. Keep it up guys. Keep educating and keep growing!

[@EngineeringMindset]

Glad it was helpful!

[@himanshusingh-er7dd]

4444#€

[@tomboytomgirl5356]

Yes, Der Steppenwolf, electricity is BEYOND fun; it is the basis of ALL we see as 'REALITY.'

[@kamelguedd9083]

Yeh more informative than 3 years of electrical engineering that i studied 😝

[@tedkadzik8248]

@@tomboytomgirl5356 Q QQq

[@ragilmalik]

can't believe i'm watching this for free while i had to pay for my engineering degree.

[@electronresonator8882]

but you can't apply for an engineering job with youtube's certificate I'm not an engineer, I do engineering stuff as hobby, that's why I watch this video

[@EspHack]

And thats why we're all doomed, i would much rather hire someone that seeks knowledge like you instead of yet another bot coming off some college because "he has to" and "engineering" seemed cool

[@CitySwimmah]

Well I have a masters degree in mech engineering, and I still watch these videos to gain practical knowledge about existing solutions. Degree gives you theory. principles and knowledge about ways of designing stuff. These videos give that practical knowledge that you dont really get from universities, but if you want to calculate the thermal expansion of the engine block under load, a fitting degree could be quite useful in order to validate the results. Hence the importance of a degree should very much vary depending on the specific needs of a company.

[@GVChannel]

Good lesson!

[@FCES_Electrical_Sol]

@@CitySwimmah well said, well spoken 👏🏾👏🏾👏🏾👏🏾

[@danbuchner28]

I am a former college electronics department instructor, you do a good job explaining basic concepts without going into the mathematics. I think this is how students create an interest in electronics.

[@iwishtobetexan6060]

Hey man I'm interested in electrical engineering and was just wondering if you had any advice for me. I've never been to college but I'm mechanic apprentice and was also wondering if there is more things to teach myself about electronics in a vehicle.

[@danbuchner28]

@iwishtobetexan6060 Well, there is obviously a lot of electronics in vehicles. You can learn about microprocessors, ac/dc motors, transformers, digital circuits, analog circuits, and some of the basic chips and how they are typically used.

[@sekroz896]

Once when you know how all the parts work, it's honestly crazy how simple this setup actually is considering how clever it works.

[@apa_marisapamaris2387]

I

[@apa_marisapamaris2387]

I "L,.

[@apa_marisapamaris2387]

8,,

[@apa_marisapamaris2387]

I

[@apa_marisapamaris2387]

I 😍 it

[@-oysterthief4444]

I’ve been trying to wrap my head around 3 phase power generation for years! Im a hobbyist, so I’ve never really studied it, but as with a bunch of other comments I read, you explained it way better than any resource I’ve come across. I can now say I have a basic understanding of how 3 phase works!! Yay! Thank you!

[@TonyP9279]

There's no better place to learn about 3-phase than by watching videos about DC power generation!

[@stevebahr7782]

This is without question the best explanation of three phase, rectification, and regulators I have ever seen.

[@SerpentDrago]

The way you showed the phases and then turned into DC , was absolutely one of the best you tube videos on it i've ever seen , Great work !

[@waynestewart1919]

These videos are well done. I never knew how complicated a car charging circuit was until seeing this. Thank you! I think my favorites are 3-Phase Motors and Star-Delta controllers so far.

[@fiftycalM2HB]

I’ve a BS in Chemistry - and didn’t understand 3 - phase power until now. Thank you for a clear and concise explanation!

[@joshuareynolds7982]

This literally has to be the most informative and simple ways an alternator has ever bee been explained. To me anyway, I have a hard time understanding electrical but man, not anymore this was a real help

[@georgestyer2153]

AS a former lecturer in electrical science I commend your brilliant produced explanations of 3 phase without the encumbrance of mathmatical calculations. I wish our teaching plan was more in line with yours !!!. In another life you could have shared the Royal Society lecture hall with Mr. Faraday ..thank you

[@davemwangi05]

Electrical science? I've never heard such a course. maybe elec eng.

[@georgestyer2153]

@@davemwangi05 No...this was a course designed by Prof Derek Williams and I took part in it's delivery where we took the practical aspect of electrical engineering and examined the subject from a scientific approach...a bit different but turned out to be very sucessful.

[@davemwangi05]

​@@georgestyer2153 Oh okay. And here's this eng challenge that has always puzzled me, and I ask people and they seem puzzled as well. You know that case of current passing through a solenoid? We know that if you open the switch at time t, the magnetic field will collapse and generate a spark. Now, if such an inductor is placed in a vacuum, and then one opens the switch when it's 'carrying a high current, what will happen? and we know one cant destroy energy or create it. Really interesting question, try figuring out and tell me. or you already know the answer in your fingertips.

[@coolbreezeafrica6571]

Exactly what I have been yearning for....thank you Engineering Mindset.

[@EngineeringMindset]

Glad to help

[@christopheryoung2368]

great format

[@jaredwillette9475]

Super great visualization. You guys have helped me gain a greater and greater understanding of electrical theory and components over the past couple of years. Keep it up!!

[@legendaryx2k19]

There is something satisfying about the -ve flow electrons in every video for precise demonstration I will never forget it now lol

[@ritesh8826]

This channel is soo underrated.

[@tcantrell1993]

The fact that you show electricity as the actual transfer of electrons rather than the flow of current is super refreshing. Great job.

[@NicolasZorziLima]

Videos and explanations like this should be mandatory on engineering colleges. Excellent! Many thanks!

[@WistrelChianti]

Superb! The lightbulb went on at around 7mins once I twigged what the electro magnet was doing (damn clever!) but the fuller explanation was greatly appreciated, especially around the phases. Thanks truely excellent video!

[@denverpili3510]

A civil engineer specializes in structural design, now knows EE and Electronics basics in 1day watching in KZbin. Thanks The Engineering Mindset.

[@0blivioniox864]

I find myself coming back to this video again and again to remind myself of how this important component works. I had no idea I was generating 3phase power in my cars' alternators. This is great stuff. Many thanks for this vid.

[@josephmclaughlin9865]

I agree. 3-phase surprised me

[@HamzaNajahOfficial]

This is insane! what a simplicity! You made it so easy to understand as always, that's why I love this channel, thank you so much ❤

[@EngineeringMindset]

Great to hear!

[@HamzaNajahOfficial]

❤️❤️

[@foreignermakingmoney-phili1458]

Hi The Engineering Mindset, Great video you have produced here, I really enjoyed it, great content, great animation. I particularly enjoyed where you made so easy for non technical persons to understand. I felt it was really informative and you really brought the point across well. I am really interested in engineering and have had a career in engineering for over 28 years from everything from starting as a mechanics assistant to now a Project Manager. I enjoy sharing my skills and knowledge as well with others like yourself. I have provide training to others and had apprentices work with me to kick start there careers. Many thanks, Great job.

[@gayanmadusanka5230]

You explained deep theories in a simplified way. Thats great

[@StrangerHappened]

*I LOVE* the lad's accent and voice. And, of course, this is a great explanation, as always.

[@RyanANewman]

That was very simple and cleared everything up. Thank you!

[@R-Clairvoyant]

Came for an alternator in depth, instead met half of the electricity basics. What a video!!

[@mikechiodetti4482]

This is without a doubt the best and easiest way to understand how an alternator (or generator in GM speak) works! I wish I had this when I went to automotive training many years ago instead of how and what was taught back then!

[@HassanETECH]

Your videos are always awesome. I know how much it takes to draw, animate such thing. Welldone, u r truly appreciated mate !👍

[@kocengineering769]

In my home little kids of 12 years are there they can get minimum knowledge by your videos sir Kudos keep it up!!!!☺️☺️☺️☺️☺️☺️

[@edilbertoduarte9221]

Happy that you take the time to make this videos. They're super educative.

[@tahaplh1]

Love the way they explain things so simplified and informative

[@belchnasty]

There is some seriously good teaching material on this channel. Colleges should take note

[@NotThatGuy_YepThatGuy]

I was just wondering this while driving home the other night. Thanks

[@tylerhusky4065]

Bravo! Fantastic demonstration on how an alternator functions and your animations were superb!

[@neilfurby555]

The quality of this series is absolutely superb, one of the very best edutainment channels. Thank you!

[@Mr2Xri]

Best exlpanation for the altenator that I have ever seen or hear!!!

[@shubhamupman7260]

Seriously the best Engineering content out there!! Keep the good work going!!

[@alexpalsater7983]

How can you even create such an informative video and have it be just 18 minutes long. This would have taken forever to grasp at school or by reading online... Super good job! You explain and show things so well!

[@jrv5280]

been working with alternators for long but this the only video that let me fully understand the term "3 phase".also a great and simple way to explain dc and ac.great explanations of everything about the altenator.thank you for this great teachings

[@speedygonzales9993]

Damn GOOD! explanation. Pity we did not have The Engg Mindset (& KZbin) when we were students eons ago.

[@definty]

OMG Phase was explained in the most pragmatic and simple way I have ever seen on youtube and iv'e seen alot of youtube

[@Boss_Tanaka]

Thank you very much ! That was so clear and well explained. Instant subscription. Every time you talk calmly about ‘’ full bridge rectifier’’ l hear ‘’FULL BRIDGE RECTIFIAAAAA !!!!!’’

[@arthurfricchione8119]

New subscriber to your channel. Retired aircraft mechanic learning a new field of automotive electronics. This was an excellent explanation and I will now go check out your other videos. Than you so much for sharing. Artie 😊😊😊

[@nikosapikos9631]

Exceptional work with exceptional animation and pictures, easy to understand,very analytical,leaving no blank spaces. As we all know how much hard work is behind this task of videos and explanations, a big thank to you is the least we can do.

[@lewisrmc9565]

Brilliant video as usual! Could you do automated voltage regulators for a generator?

[@Tomee62538]

Brilliant video, wish I had these videos 30 years ago when I was studying electricity.

[@TGam-wo2vd]

Such a well explained, i had this video in my suggestions for a long time and now i finally clicked on it and it blowed me away. Good job, keep them coming.

[@lukesibley-swain2479]

*blew

[@TheGibby3340]

Fantastic overview. Wish I had seen this 35 years ago...would have saved me a lot of head scratching 😀 A little mystified at the mention of the capacitor @ 14:36...perhaps it’s mentioned in the interest of aiding understanding. Thx! Great piece 👍

[@MrCoolerMan1]

The capacitor charges up with the voltage, and when the voltage is dropping, it discharges to keep the voltage up. This makes smoothens out the waviness. The higher the capacitance, the smoother the output will be. Also, I agree, this was super helpful.

[@TheGibby3340]

@@MrCoolerMan1 Hello... totally understand they mean to imply it’s a smoothing cap and for a description of operation all good... But you will struggle to find one in reality on an automobile...at least all the vehicles I have owned over the years...Cheers

[@gamegineer2540]

These illustrations make me fall in love with electricity again and again 😍

[@EngineeringMindset]

Glad you like them!

[@lobecosc]

Very good video. I learned a lot. I had to replace one recently in my car so its good to know how that works and why was it so important to the car.

[@robertmeyer4744]

That was great. very detailed .been working on them over 35 years now. so many different types. most of the US market uses a Delta wound stator . this video shows a Star winding. still works . not very common in US auto market. The diode trio is not always used. but will be a very long video to go over the different types, anyways very good job with this video. this is pretty close to the replacement 1 wire type in my CAT genset. pully has 2 belts . stater is Delta wound. The voltage REG is different. self exciting type . just spin in either direction and charges battery.Thank you for taking the time to make this video.

[@jerrywiniarski1176]

This was a most excellent presentation...it was very informative and entertaining..definitely a 7 on a scale of 1 to 5. Thx so much 😎😄👍🎈

[@stupossibleify]

Brilliant timing! Love your videos, thanks for taking the time to produce them

[@EngineeringMindset]

Glad you like them!

[@mike_1374]

Perfect explanation now it turn my toughest lesson to easiest. Thnk u so much.👍

[@omnipotent1992]

You answered what I've had trouble understanding for so long. Thank you!

[@jessicastephendauer8371]

Great video! So well described and explained.

[@hemantoraon10]

Your way of explanation is fantastic and your animation is to good Thanks for making this video

[@EngineeringMindset]

Thank you!

[@luistroche7071]

Great Instructional video, Complements very well with the 300 pages I studied about the subject. Thank you !

[@tedlahm5740]

Paul, you have been a great help over many electricity questions.

[@baigani0]

this is mind blowing, how we can support you fella?

[@abilashbrian4997]

@The Engineering Mindset ......u r a god level explainer with such simplicity ......the way u explained 3 phase AC was ingenious....love ur work bro...a huge fan from the past....keep teaching us .......U R THE BEST.........

[@EngineeringMindset]

Very glad to hear, thank you

[@davemwangi05]

​@@EngineeringMindset Hi here's this eng challenge that has always puzzled me, and I ask people and they seem puzzled as well. You know that case of current passing through a solenoid? We know that if you open the switch at time t, the magnetic field will collapse and generate a spark. Now, if such an inductor is placed in a vacuum, and then one opens the switch when it's 'carrying a high current, what will happen? and we know one cant destroy energy or create it. Really interesting question, try figuring out and tell me. or you already know the answer in your fingertips.

[@stanburk7392]

and now I finally understand AC and DC and how it is generated. Thank you

[@ghettocowboy993]

this was an excellent explanation on AC , i have seen many , read many, had electricians tell me , ect. but this is the best hands down

[@karonynicor1389]

Thank you very much sir for all the knowledge you've shared on us .....💓💓

[@tubegor]

That is rightly an ingenious engineering explanation. Only those who understand the basics can explain it well.👍 👉 Most of the teachers have no idea and they sell it as a doctrine.

[@carlbernard7615]

Thank you for this, I have just self diagnosed my car issues that have been plaguing me for months. It's the bloody alternator. Cheers

[@sampatgunjawate2299]

Very good explanation..complex things made very simple that some people takes years to understand !! Great work.

[@b_40_princekumargupta51]

Congratulations for 1 million ❤️

[@EngineeringMindset]

Thank you!

[@stanleyarczvnski1449]

Gosh! I graduated with a bachelor of electronic and telecommunication 4,5 years ago. I completely changed my life since then, ending as farm manager. Have some huge old mill here. Always thought about running it as a hydro plant, but I missed 0,1% of the knowledge required to build my generator... You did it! You filled my missing bit! It's sooooooooooo amazing, cant wait to build it :D If it's gonna work you'll save thousands of tonnes of carbon footprint ;)

[@astragreen]

Nothing wrong with carbon!

[@dido1803]

Now I understand a lot more about alternator. Thanks for great explanations.

[@rajpanchal1517]

I would love watching and learning more on electrical components in a car♥️♥️

[@ramioooz]

Now this is what I call an education 👌

[@smilingbutdeadinside2073]

just love how this channel simplifies complex topics!

[@hoover2666]

this was so good, that our electronics teacher just plays us ur video, and then he explain anything thats unclear

[@progman347]

No words. You guys at engineering done a great job for humanity.

[@MrCarbonD]

Love it man. Didn’t you do a video on chill water systems?

[@EngineeringMindset]

Sure did

[@camhaslehurst1609]

Another fantastic video from you folks. You guys make the best explanations of this stuff to be found anywhere!

[@MdRubel-jk4ze]

এক্সক্স

[@belayethossain892]

Your teaching is very clear very easy and very effective to understand very difficult things , i never found as like clear teaching. May you live long.

[@Poptart133g]

Good video as always, but there's one thing that I think should have probably been changed as it gives a wrong impression of how the car works in general. When talking about the regulator, it was stated that, " the output voltage of the alternator varies with the speed of the car", and "the faster the vehicle travels, the faster the crankshaft rotates." This brushes over the fact that the speed of the car, and the rotation speed of the engine are not directly linked. A car can be moving at the same speed in 4th or 5th gear, but the difference in gear ratio will mean the RPMs will be drastically different to compensate, which will cause the alternators shaft to rotate faster or slower, changing the output voltage. Changing, " the output voltage of the alternator varies with the speed of the car" to, " the output voltage of the alternator varies with the speed of the engine". Obviously doesn't require explanation of the transmission, but it also does not cause confusion by directly correlating movement speed of the car, and rotation of the engine.

[@EngineeringMindset]

That's a valid point. Maybe I can link this in as I cover the transmission gear set

[@ClockworksOfGL]

B’19-GÈ3o ̄5 - Found the engineer....

[@Poptart133g]

@@ClockworksOfGL Yes, but I work with motion control systems, not in the automotive industry.

[@EngineeringMindset]

New transmission video, check it out: kzbin.info/www/bejne/iobTloCPic9khZo

[@royblackburn1163]

Wrong

[@itsabuscus1619]

The amount of well conveyed information in such a short period of time reminds me of that scene in the matrix: "I know kung-fu!"

[@EngineeringMindset]

😂👌

[@serogolemogole2685]

😹😹gud1

[@mr.kumpuni7868]

Thank you so much.. You're one of the best teacher in the world. I can use your knowledge on my homemade generator.

[@subodhdeshmukh3372]

brilliantly explained man... appreciating your hard work

[@AlecKristi]

Great video, but here's a couple of small criticisms: 1. "diode trio" is a bad term to use, a proper term is "half bridge rectifier". 2. The reason for using a half bridge is not explained in your video, but it's easy: it's there to prevent the battery from draining when the engine is off. It's a very nice way to passively and reliably control the flow of power. The current returns through the main rectifier, and you only need to use a half bridge to isolate the field winding from the battery. Some alternators rely on residual magnetism of the core to start producing power, this is why some cars need to be revved at start up for the alternator to start producing power.

[@ianwilliams487]

G'Day Alex,,yes you are right,,but the reason you rev them is to charge a capacitor in alternator to supply field power to the Rotor,,once yo get a couple of volts charge in the cap,then ya ready to charge,,and the other systems take over,now we have the charge to excite rotor wingdings,,

[@rockvillemike6062]

I don't think so, , the cap does not hold a charge to start the system. it's the residual magnetism in the rotor which excites the system. it's not a refrigerator . That cap is only to block radio interference.

[@TheJavonplayer]

The 3years I been electrical engineering never understood the wye system the way I do now after watching this video. That it’s a shame how it’s made do difficult to learn basic fundamentals these days.

[@nickush7512]

The best aternator education that I have ever come across... many thanks.

[@shervamax]

why i found it now damn i must to watch your all video can't believe this is free thank so much keep it

[@TheBlueThird]

In today's alternatives the voltage regulators are inside the alternator. In much old cars they were separate from the alternator.

[@williefleete]

They also used a more mechanical way of regulation, bi-metal strips with resistance wire around them that switched the rotor winding on and off

[@saraweber312]

I can’t even imagine creating these 3d models 🤯 great video man!

[@oficinadoeletricista]

I love your videos Bro. Exceptional explanatory. The lessons in your videos are extraordinary and of an absurd level of clarity in all the explantion that is passed to us allowing an understanding so facilitated that it is impossible to see only once. Sorry for my English, because I'm still learning. Congrats on the amazing works. 👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻

[@moorrona17]

What is the minimum RPM required for automotive alternators and what determines that?

[@EngineeringMindset]

Good question, it will charge and produce 14v while idle but I don't know the exact rpm below which the voltage is unusable. There's also voltage drop through the diodes.

[@donnypeterkin3336]

Firstly the warning lamp, normally 5 Watts, the "Cut-In-Speed" is determined by the amount of current and the speed of the alternator. Imagine that the current is limited through the rotor by the warning light, as the alternator spins, this allows the currant to become stronger due to the production of currant, then the warning light will extinguish as the rotor has full currant (3-4 Amps), then cut in speed is reached, some 900 Alternator RPM and not engine RPM as the pulley is smaller than the crankshaft pulley, if you want the alternator to cut in earlier, simply put a bigger bulb in the warning light, thus higher initial currant to the rotor QED cut in speed lower engine speed. Not to forget that the alternator is taking BHP from the engine, higher the output, the more it takes, turning the alternator without output can take 2 BHP, depending on what you are doing with it, I guess power plant to charge batteries then inverter to power the home. If you can find brushless alternators (CAV ) used some in military applications 90Amp quieter and no parts wearing out except bearings. I see many projects on the internet using car alternators, putting permanent magnets instead of wire-wound ones. The capacitor is purely for interference and not for balancing the peaks and troughs, although it does do that to some degree . Hope this helps

[@moorrona17]

@@donnypeterkin3336 is do not understand it entirely but will read it a few more times and reply back for some clarifications in some of the areas my knowledge is lacking in. Thanks for your reply.

[@patrikerdosi1987]

Nobody: Me thinking about how my brain send me electricity when i need to pee...

[@Jaden-up3bg]

You just sent electricity to make my brain realize I need to😱

[@christopheryoung2368]

objective

[@mzr95]

Thank you “Engineering mindset “You explained it so well.Again,,,Thank you so much 🙏 ...

[@Thelandoffreedomify]

I'm study to become a certified electrician in Sweden and all the long and boring videos the teachers trying to explaind as same concept you in one videos make excellent. Tanks for you videos! I'm doing an changeover in my carer to become under 1000v electricians.

[@vinnyhorapeti2461]

U should collab with real engineering and name your channel extreme engineering

[@christopheryoung2368]

innovation

[@Tirith2708]

Apex players: That's no Alternator..

[@YouMockMe]

That's awesome....answered my diode question, just before I was about to type it. Bang on!

[@pinkladych9306]

i' m going to be an car mechatronic... its so well explained. and with this perfect animations i now understand wayyy better what my teachers explained to me. thanks

[@ijazzzali]

The video was so smooth, the way he explained, I wished the video never finishes.

[@-oysterthief4444]

Somebody has a crush! oooOOOoohh!