01 - What is 3-Phase Power? Three Phase Electricity Tutorial 

I'm heading into school soon for 3rd year electrical... I have been using all your lessons for over 3 years now. You have taught me so much. I wish I could chat with you one day. Thank you for all your lessons over these past few years! You have been instrumental in developing my understanding of electricity and I believe I am a better electrician as a result. Really can't say thank you enough. With deep admiration and respect, sir, Thank you!!!

When a instructor teaches a hard or confusing subject and makes it look simple, he is the best at it.

Yes, excellent teacher. The world would be brighter with more people like you.

I really appreciate how you start with a road map of the structure of the material you will cover

I'm Electronic Engineer working as software programmer, in these days my interest caught by solar and started solar training and your video help me lot to understand clearly 3 phase 😀

This would explain 3-phase motors in most ebikes today. I’m teaching myself how to repair my ebike. Frustrating but enjoyable process. Funny story😏controller died on my ebike when I got caught in rain. 2nd controller in six months. Fed up😡with mediocre customer service in getting parts (please…never said I’d do it myself. Cut the motor cord to keep me motivated, bought parts, watched tons of RU-vid videos and finally. After about a week of going from knowing nothing to learning the basics, I upgraded my controller (checking MOSFETS, resistance, etc are correct), added new LCD display, and learned all about Hall sensors, 3-motors, amps hour, voltage, power, phases, etc in the process. AND that hub motor spinning the other day 💪🏾 Videos like your help a lot. Thanks. /Bklyn👑

You are a very good teacher. You can explain in a very simple manner trying to let the listeners understand even if they don't have enough background in electricity/ electrical circuits. Do more videos on basic electricity. Thanks.

I wish you were my instructor when I was in school. Your discussions are clear and well defined. I've learned more from you than I did in school. I've better understood learning on my own but better examples in these videos.

Thank you! After all these years, I am finally enjoying mathematics! Keep up the great lectures!

Chief you're one of the best lecturers ever, thank you keep it up

Just a simple and splendid teacher who loves to make things easy to handle for us. Best regards to you sir! Engr. BK jawed khan Canada.

I worked in a textile mill years ago and most everything in the mill was 3 phase. You don't need a start or run capacitor on a 3 phase motor. You have a problem you just ohm it out and look for a short or a bad bearing or bushing. I can tell you a little old school secret I learned. If a motor is hot when you check it then it is good. A motor with an open winding will cool off since it isn't trying to run.

Thank you! Your explanation was clear and concise.

All of these videos are really well designed and presented. I am signing up to for the full courses - totally worth the money.

You made concept of 3-Phase power in a AC Circuit Analysis so easy to understand.

I took Robotics in College, I struggled so much with electricity and electronics. I was able to follow you in your short lesson more than what hours of beating my brains could accomplish.

Teaching may be the noblest pursuit, my utmost respect to you sir.

Hello, thank you for the informative video. It answered some of the questions I have as I learn about electricity. However, I think there might be a problem with some of the math... if you have a cos b(x-c) + d, you get a magnitude of a, a dilation of b, a horizontal shift of c, and a vertical shift of d. Now the one I think might be incorrect in the video is the horizontal shift of c. If you have +120 degrees, then that should shift left (or negative), not positive. The reason is that c is subtracted, so if you make it +, then you are subtracting a negative. Likewise, if you are going to do -120 degrees, that should be a shift to the right because you are subtracting the positive value of 120 degrees. So if you have cos (x - 120) that means the cosine graph shifts right 120 degrees. If I am misunderstanding something, please let me know because I want to understand this, but I think that might be wrong, so I'm asking for your input. Thanks!

Thanks much Proffesor love your works may God continue blessing you.

Thanks! I’ve been working with electrical and have been meaning to find out what the difference is!

Thank you. You are the best instructor I have on this subject. I probably have this thing more than 30 times since high school, but this is the first time I really find it useful and make sense. It is your "MOTIVE" method makes the new knowledge associate to things I already know, smoothness operation of motor. I guess none of my previous instructors really works in this motor design job. One suggestion, start with a resistor to explain the power thing 3 phase world probably cause confusion. Negative power for capacitors and inductors? Do you mean some thing get colder when pass current to it? If I am teaching this, I will use a running motor as a model only, There is no isolated resistor, capacitor, or inductor. And the power is not just heat, but heat plus rotational energy. Negative power means put breaks on and take out rotational energy. Power hear is Power Flow, with direction, source, and destination. Some of my words may need refine, but I have a clear a model now. on your first video, I watched in 3 sections, about 5 min. each. Rewind a little, paused a few times, until the image of fast turning motor becomes solid at the center of my view. This image probably not good enough for you, but is good enough for me not to push the 3 phase world aside. If a running motor, may be an old record player, is running in the background, with unsteady speed, it might help student. Thanks again.

Thank you for the lecture... The last time I encounter vectors was 40 years ago. I am surprised that I still remember things.

You're the greatest teacher of all time. Tnx for the lesson

This video brings back memories of my electrical class in 1978! I hated my electrical class, made no sense. This is great information if you want to teach this math. Simply put, an alternator has equally spaced coils connected into three outputs each is 120 degrees apart. No big deal! I started as an electrical drafter in 1983, fell in love with my job and stayed with it until 2018. I designed residential, commercial, and industrial projects almost all with three phase systems. I became a PE in 2007. The point is, this point should be a 2 minute discussion and done. In the whole time of designing systems, I never used the math shown here. It's useless in the real world. But if you want to teach, it's good to use up time.

I appreciate your efforts. Such a good teacher. God I love the internet for this purpose.

Brilliant teacher. A thorough explanation that makes it easy to understand a concept that can be difficult to understand. Well done.

Thanks for the great video. I love teachers that explain all details needed and never complicate anything. Thank you, us students do appreciate you!!

Thanks, sir. very well explained. I am a marine engineer and i am not so good at electrical. But know I may improve. thanks a lot again.

Awesome explanation, on y-y it great for balance load and on delta- it’s great for heavy loads.

Very informative. Thank you so much for sharing.

Wonderful and gifted tutor! Your skills of communicating your knowledge is superb Sir! Maths was never my strong subject. I wish I had you as a tutor when I was at college. Keep up the great work with your videos!

Excellent and clear explanation. Thank you.

Thanks you for posting this video, incredible lecture. 🙏🏼

Very clear and concise. Thank you. Phasor diagram is wonderful.

Thanks for your teaching, your making good use of time, spot on.

You are awesome speaker sir god bless you all family

Nice communication skills . Clear speaking skills nice awesome extra ordinary . Tnx alot

keep teaching.... you will live forever!

I used to work with three phase power on commercial airliners where it very useful for instrumentation and for high power. Mostly on 400 cycle systems syncrotels and control servos etc. I had studied an electronic engineering course for 3 years at Miami/Dade college.

thank you so much for these videos! clear cut explanations without question.

Thank you for showing math and science now because you’ve been showing this I got a 100 on my test

Thank you for sharing your knowledge. Great presentation!!

Now I understand what a 3 phase connection really mean. Thank you sir!

You are really my one of favorite things to do watch here

Am enjoying a lot here in Zambia Keep it up, you are the best to me

My favorite Proff....the reason imho....total gentleman!

A competent teacher. Thanks.

Keep doing videos!! They’re great and easy to understand!

Good Job... a retired utility co. project engineer working in protection and control.

Very brilliant and well explained. Thanks

You are very helpful with all your videos!!!!! You need your own channel

Each phase magnitude divided in 120d interval base angles leaves initial cosign separated in 3 negative directions in all power applications.

Thank you very much for these videos, they're real treasure.

I wish I had a teacher like this for my Part 1 engineering class.

really appreciate this explanation your videos are amazing thank you

Amazing explanation. thank you

Tesla invented the three-phase, 6-wire motor and the two-phase, 4-wire motor. But the high number of lines prevented success. Without knowing about Tesla, the Russian Michael Dobrowolski in Germany perfected the three-phase motor with three lines as we use it today. The first application was an 8000 volt high-voltage line from Lauffen to Frankfurt. Two transformers, a generator and a three-phase asynchronous machine were used for this purpose. Dobrowolski had improved the three-phase motor so that it worked, in contrast to the Tesla patent, which remained in theory. So Tesla patented the 4-wire motor (two phase) and 6-wire motor (three phase) and Dobrowolski got three-phase motors running in Germany with just 3 wires

You are an awesome teacher. is very easy for you to get the message across. Two huge thumbs up!

Very good teaching style..logical steady progression always keeping a tap on the cognitive loading on the learner.

This is the best teacher I’ve seen

Very very clear and informative

Very well explained!, thanks

Excellent! Keep up the great work!

Your explanation is very good to understand.

this is very nice lesson like me im first timer electrician but im only electrician in my company pioneering.. thanks master ..

This guy is 🔥. It must be nice being able to lecture without shit stains interrupting you all of the time

In the 1980's as a Cadet Deck(Navigating Officer) on ExxonMobil Tankers(then Esso) we had to learn about the 3-Phase System with electrics on Sluice and Penstock Valves in Cargo Tanks. Anybody without "A" Level Physics struggled with this ! Luckily we had a very senior Electronics Officer onboard (not a Sparkie) who explained it all to us and his name was Tom Morley a huge Guy with a beard.(Epaulettes 3 gold stripes with green in between ...a very rare rank)

Thanks sir. Very well explained keep it up you are doing a good job Sir. Hats off to you...God bless you

Thanks for all these great videos!👍👍👍👍👍👍

You are very much appreciated sir, keep it up...

Good 3 phase intro! makes the next smoother!~

You are the best teacher by far

I like the teaching of the three phase system.

Well done. Simple and clear

Excellent explanation! Thank you!

beautifully explained superb.

The lightbulb has lit thanks to these tutorials

With a little theory background he is very precise with his tutorial.

I learned something from this.Thanks !.

Thanks. I've ben looking for months for a simplified teaching of 3 phase. Ty

I would say simply a great teacher!

Eyes visual polarization and sound through ears can help monitors buffering circuit depending on abnormalities

thank you.. nice info

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This video is amazing. Thanks

Brilliant! Thx for your effort 👍

You're a great teacher. I learn easily than actually going to college before. 😁

Very good training session

Beautiful!

Great teacher.

I am interested of your Lecture sir actually i am Electrical And Calibration so iam engage with your explaining about Electrical thank you

Very good lectures

I am impressed, it was very easy to understand, thanks for the course. What if I want to learn this and get cert or diploma, is it possible?

Wow this man is a legend teacher

Thank’s, really appreciated!

Wow! Bravo! Some people were just meant to teach!

Clear teaching

your lesson are fruitful

I told myself I'd learn more about AC power but my head hurts because I just spent two hours learning about machining, 4 hours learning about the current state of world politics, and how the silent civil war here in the U.S. is going and that's enough for my day off. I don't know anything about these phasors you're speaking of, it just makes me think of Star Trek but I do understand the concept of 360 degrees in a wave vs a circle because I've studied sound engineering a bit. I think I'm going to go play some Far Cry 4. If anyone wants to give me some pointers on where to start in learning AC power, I would much appreciate it. I understand just the real basics of what AC is, vs DC and 120/240, 3 wire single phase, midpoint neutral but if I need to start at the very beginning then I will.

God bless you 🙏 excellent work