01 - What is 3-Phase Power? Three Phase Electricity Tutorial
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- Опубліковано 11 кві 2018
- Get more lessons like this at www.MathTutorDVD.com
Here we learn about the concept of 3-Phase Power in AC Circuit Analysis. We discuss the concept of separate phases in a three phase circuit, and how the phases are arranged to make the circuit balanced.
We discuss why 3-phase power is useful, and how the transmission line connects the three phase source to the load in a practical circuit. We also use phasor diagrams to label each phase of the current and voltage.
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.
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@Fletcher Giovanni Instablaster ;)
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@Fletcher Giovanni happy to help =)
Yes, excellent teacher. The world would be brighter with more people like you.
Chief you're one of the best lecturers ever, thank you keep it up
I really appreciate how you start with a road map of the structure of the material you will cover
Thank you! After all these years, I am finally enjoying mathematics! Keep up the great lectures!
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.
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.
ITT
Thank you!
Your explanation was clear and concise.
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 UA-cam 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👑
Thanks much Proffesor love your works may God continue blessing you.
Shut up Jennifer@Jennifer Rissetti
Kick her ass jennifer!!!!
All of these videos are really well designed and presented. I am signing up to for the full courses - totally worth the money.
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 😀
Very informative. Thank you so much for sharing.
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.
Thanks for the tip!!! Greatly appreciated.
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I thought a capacitor was to put the current out of phase which gives the motor additional torque to start,
@@vxnova1 yes but in 3 phase there is no need for the cap cos atleast 2 of the phases always have torque even if 1 phase has 0 torque therefore start up cap is unnecessary
@@vxnova1 gj(jjk(jjb iii jjjjjjjjii
Teaching may be the noblest pursuit, my utmost respect to you sir.
Excellent and clear explanation. Thank you.
Thanks you for posting this video, incredible lecture. 🙏🏼
You made concept of 3-Phase power in a AC Circuit Analysis so easy to understand.
Very clear and concise. Thank you. Phasor diagram is wonderful.
Thanks! I’ve been working with electrical and have been meaning to find out what the difference is!
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
Thanks for the great video. I love teachers that explain all details needed and never complicate anything. Thank you, us students do appreciate you!!
Brilliant teacher. A thorough explanation that makes it easy to understand a concept that can be difficult to understand. Well done.
You are awesome speaker sir god bless you all family
Very well explained!, thanks
thank you so much for these videos! clear cut explanations without question.
Thanks for your teaching, your making good use of time, spot on.
keep teaching.... you will live forever!
Amazing explanation. thank you
Thank you for showing math and science now because you’ve been showing this I got a 100 on my test
I appreciate your efforts. Such a good teacher. God I love the internet for this purpose.
Very informatice
Nice I appreciate.......
Keep doing videos!! They’re great and easy to understand!
Nice communication skills . Clear speaking skills nice awesome extra ordinary . Tnx alot
Thank you for sharing your knowledge. Great presentation!!
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!
You are very helpful with all your videos!!!!! You need your own channel
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!
A competent teacher.
Thanks.
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.
For robotics and such, what are some things you would suggest learning? From the basic on up?
I wish I had a teacher like this for my Part 1 engineering class.
Its crazy how many college students did not like or easily learn from their teachers..
They are paid either way and have political agendas
Very brilliant and well explained. Thanks
Awesome explanation, on y-y it great for balance load and on delta- it’s great for heavy loads.
beautifully explained superb.
Very very clear and informative
Thank you very much for these videos, they're real treasure.
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.
really appreciate this explanation your videos are amazing thank you
I learned something from this.Thanks !.
Excellent! Keep up the great work!
You are an awesome teacher. is very easy for you to get the message across. Two huge thumbs up!
Why not multiples of three? Six or Twelve?
Now I understand what a 3 phase connection really mean. Thank you sir!
Am enjoying a lot here in Zambia Keep it up, you are the best to me
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.
@Dan Mattingly Well said!
@@KevinCoop1 Agreed! You can't build a house without foundations!
Maybe I somehow had the foundation and didn’t realize it. I still feel that they try to make the math that is easy into something complicated.
You are really my one of favorite things to do watch here
Excellent explanation! Thank you!
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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.
You are very much appreciated sir, keep it up...
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?
@Anna Davis 1q
My favorite Proff....the reason imho....total gentleman!
You are the best teacher by far
Good 3 phase intro! makes the next smoother!~
Your explanation is very good to understand.
I would say simply a great teacher!
Thank’s, really appreciated!
Well done. Simple and clear
This is the best teacher I’ve seen
Thank you!
Very good teaching style..logical steady progression always keeping a tap on the cognitive loading on the learner.
Thanks sir.
Very well explained keep it up you are doing a good job Sir.
Hats off to you...God bless you
You're a great teacher. I learn easily than actually going to college before. 😁
Thanks man
Omg. Thank you sir for replying! Watching from the Philippines. 😮🙌
Good Job... a retired utility co. project engineer working in protection and control.
Brilliant! Thx for your effort 👍
thank you.. nice info
The lightbulb has lit thanks to these tutorials
very exellent tutor
i really love it..
very clear..
This video is amazing. Thanks
With a little theory background he is very precise with his tutorial.
Thanks. I've ben looking for months for a simplified teaching of 3 phase. Ty
this is very nice lesson like me im first timer electrician but im only electrician in my company pioneering.. thanks master ..
Hi, i have a question and hope i can find the answer. If i am going to design a generator with 6, 12, or 24 phases how can i connect the phases to get at the end one positive and one negative output. Thanks
your lesson are fruitful
Wow this man is a legend teacher
Very good training session
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.
Wow! Bravo! Some people were just meant to teach!
Thank you, Sir, it is profitable
Great teacher.
I have a question:
What makes phases to dephase? How does it come naturally to be dephased by 120 degree?
thanks!
Beautiful!
I enjoyed this video. It all seems to make sense in the context that you explain, but I'm still stuck trying to find an on-ramp for this material. Why are angles a part of this at all? How do angles relate to magnitude, and what is magnitude in this context? I hope we can backtrack in future lessons and explain some basics.
God bless you 🙏 excellent work
Each phase magnitude divided in 120d interval base angles leaves initial cosign separated in 3 negative directions in all power applications.
We get 3 phase supply in our homes to sump pumps, grinder motors, central air conditioner, & refrigerator,? We don't hear noise or vibration.
Good clear lesson. Thankyou.
Thanks so much!
wow you are excellent international teacher , so i am happey when i witch you
Wow great lesson. Thank you.
But why cosinus instead of sinus ?
Tanx for your effort full helps