Electrical Engineering: Ch 13: 3 Phase Circuit (4 of 42) A 3 Phase Generator (6 Coil)
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- Опубліковано 16 січ 2019
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In this video I will explain the circuitry of the most common 3 phase generator (6 coils, more common) and how they are built. A 6 coil 3 phase generator consist of an outside part and inside part called the stator with 6 knobs which is connected to a magnet.
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Haha I love how you just calmly finish the video with the cat in the background. Thank you as always.
2023 and still the best lecture series for electrical engineers professionals and students alike. Thank you Michael!
Thank you. Glad you find our videos helpful.
Your smile at the end is so wholesome, it made my entire day better. Thank you for your contributions to human knowledge & learning. :D
Thank you. Making these videos is a lot of work, but knowing they are helping students around the world makes it all worth it.
This is the cleanest generator winding video I have seen on youtube so far. Keep up the good work.
Thanks 👍
The first teacher who explains the magnet position according to the sinus curves in a right way by mentioning the "change of the magnetic flux" at 2:00 - Thanks
You are welcome. 🙂
I agree. But how can it be that so many people are wrong on such a basic thing and they are so convinced that they do video on youtube? (Excuse for errorrs, English is not my language)
@@marvnet8898 cuz it’s electrical engineering (I’m a mechanical engineer by the way 😅). I’m not sure if everyone who thinks he understood, has really understood :)
I spent hours looking at many tutorials to figure out the most fundamental thing you didn't mention! Which is this: I discovered that the maximum point of flux produced by the rotor is at 90deg to the N & S pole ends, which is why there's no voltage produced when the rotor pole ends pass over stator coils at 60 deg apart. Hence, now explains why the waveforms are 120deg apart, not 60deg!
Good input. Thank you.
"Theo định luật Faraday, cường độ dòng điện tỷ lệ thuận với tốc độ thay đổi của từ thông." Ngoài ra, mật độ từ trường cao nhất gần nam châm nhất, có nghĩa là tốc độ thay đổi của từ thông sẽ lớn nhất nếu nam châm di chuyển trở lại cuộn dây, ngay cả khi nam châm đang chuyển động với vận tốc không đổi. Vì vậy, khi nam châm ở gần cuộn dây nhất, sao cho các đường từ trường tiếp tuyến với cuộn dây, lực điện động cảm ứng phải lớn nhất. Nhưng trong video, nó cho thấy điện áp cảm ứng bằng 0 tại thời điểm này.
Mặt khác, khi nam châm di chuyển ra khỏi cuộn dây, các đường từ trường trở nên ít dày đặc hơn, có nghĩa là tốc độ thay đổi của từ thông giảm, do đó cường độ dòng điện sẽ giảm. Tuy nhiên, biểu đồ trong video cho thấy điều ngược lại.
Tôi thực sự không hiểu điều này. Bạn có thể vui lòng giải thích điều này cho tôi không?
Excellent explanation! I've been curiously digging into learning to make my own generators and especially was interested in 3 phase. This laid it out very cleanly and effectively. Thank you for putting the time and effort into this and sharing it online!
Glad it was helpful!
@@MichelvanBiezen Agreed I am so glad I found this channel for the first time I am understanding coils and coil layout now I need to know if the coil wire is enameled or insulated in any fashion I am confused about that I see most motor windings as plain wire but it does appear to have a clear enamel coating of some kind does generator wire have this same clear coating of enamel or a kind of insulation of any kind
Mr Bieze dont need sleep.So many videos...I Just thank him.
Dear Michel, thank you so much for your very clear explanations. I sometimes consult your videos to get inspired for better and focused explanations in my own teaching. Of course, I refer to you.
We all learn from one another. I am following in the footsteps of some great professors I had when I was a student. 🙂
Awesome video, that helped a lot. Thanks.
@Michel van Biezen will the efficiency of the generator increase if the stator cores around which the wire is wound are hollow, like a pipe, because then the magnetic field in the stator will be more near the wound wire, around the sides, unlike a solid rod where magnetic field will be distributed along the cross section?
funny yesterday i was pondering how to connect my 3~coils (12 as in 6pairs) with the voltagediagram while evaluating how much voltage my setup might turnout, thank you algorithm and thank you mr. van Biezen for the insight
Glad we could help. 🙂
great videos, short and very clear
Glad you liked it
Excellent. I was playing this over my sound system. I thought that was MY CAT for a minute. :)
I am trying to wire a 3 phase generator to single phase using the Twelve wires coming out of the generator wires 1 and 7 are connected to a load wires 8and 2 are connected to a load wires 3 and 9 are connected to a load wires 4 5 6 10 11 12 are all grounded. Do I split 8 and 2 and connect 2 or 8 to 3 and 9 and one to 7and 1?
Great job and nice to hear kitty meowing as a bonus.
Thank you. 🙂
Good explanation. Will be back for more
Glad you liked it
Sir i have a question.
Is it possible to get only 240 volts from the output of a 3 phase transformer? While my input wiring is 3 phase 360v? Because I'm planning to buy a 3 phase ac generator dynamo and at the same time i want a 20kva 3 phase step down transformer. Is that even possible?
شكرا أستاذ شرح رائع و مبسط .متتبع من المملكة المغربية
Glad you found our videos. Welcome to the channel! 🙂
Thank you so much sir. One doubt sir flux is actually cutting north pole side (flux is going to North to south) therefore the induced current is produced by North pole side coil only and next 120 degree to produce negative half cycle in same coil because north pole is opposite coil side..... is my concept is correct or not correct sir?
I enjoy your teaching a lot, greetings from Mexico, one question, when the magnet is pointing to any coil, lets say North of the magnet is pointing to any coil, at the same time the south of magnet is pointing to the secon coil of the same group, how is that, because in some other videos, they say that the same polarity of magnet need to be acting on the coils at the same time.....hope you can find some time to help me on that, I send you my best wishes!!
Hello, great video, can you possibly tell me what factors involved in a magnetic field passing through a winding dictate direction of current?
You can find the answers here: Physics - Electromagnetic Induction: Faraday's Law and Lenz's Law (1 of 2) Introduction in the playlist: PHYSICS 45 ELECTROMAGNETIC INDUCTION
Amazing sir..
Great video and well explained
Thank you!
Great video. One question: how are the opposite coil connected to it's "partner", and is the coil wound direction different from the opposite coil?
Thank you
Plz sombody share a link from where i can understand generators neutral.
That whats its function and how its work in animation
is it one clockwise and other anti clockwise
How many poles does this generator have? and the coil shouldn't be 120 degree different?
Hi, I'd like to ask about at which pole position the generator can achieve its peak voltage. Why does it different with the 3 coil generator? The 3 coil generator seems to have peak voltage when the pole is parallel with the coil, but in 6 coil the voltage reach its peak when the pole is perpendicular with the coil
The drawings are coincidental to the postion of the rotor. The peaks occur at the time that there is a maximum change in the magnetic flux through the loops. Take a look at this video: Physics 45 Electromagnetic Induction: Faraday's Law (4 of 4) Rotating Loop Conductor ua-cam.com/video/atbioBvN8hE/v-deo.html which show you that basic principle.
Very good video
I like very much.
I'm glad you like it
Why the synchronous generator stator is Double star connection?
Thanks Mr Van, it's clear now
Happy to help
Great! Glad it helped. 🙂
Shouldn't there be maximum positive or negative amplitude for a coil when the magnet edges are pointing to it?
We have videos explaining that here: PHYSICS 43 MAGNETIC FIELDS AND MAGNETIC FORCES
I didnt see if you mentioned the direction of winding for poles (say for A) one pole is wrapped clockwise and the other is counter clockwise. Very important for a sinusoidal input.
Thank you for your input.
@@MichelvanBiezen Is winding them in opposite directions correct?
Nice sir 👌👍👌👍👌👍👌
How many volt and ampere we have to fill the rotor that it has a quite large electric magnet to produce 220 volt?
The voltage is determined by the speed at which the magnetic flux changes through the coils. Therefore it will increase as a function of rotation speed.
I don't get it. I thought at North pole approaches the coil it starts to induce voltage reaches it's max when half way to the middle of the coil and at zero when it hits the middle of the coil. Then as the north pole is pulling away from the midde and out of the coil the phase is at max negative value. So one full phase is realize in your diagram by the magnet simply moving 2 inches, just approacing and passing out of the phase one coil. I was also let to believe a south pole will cause current flow in the same way but opposite direction. AM i wrong? If so pleasee help me iwth why and shoud the coil windings in this set up be going in opposite dirctions. For exampe one coil is wound clockwise and the other counter clockwise.
This video may clarify this for you: Physics 45 Electromagnetic Induction: Faraday's Law (4 of 4) Rotating Loop Conductor
Oh dear, I'm so confused. Isn't the flux equal to BAcosx? So when the magnetic field points directly through the windings(as drawn), its parallel to the red coil right? So how does the change in flux end up being 0? Should'nt it be maximum, since cos(0) is 1?
I have a feeling I've seriously misunderstood something. I'd be really grateful if someone could clear things up.
Flux equals BAcosx . What we need is rate of change in flux which equals to BAsinx .so emf is 0 when they are parallel
your doubt is very right and u have understood rightly
Nice video. Congratulations.
But I didn't understand why the Emf = 0 when the magnetic flux is maximun in the coils. Could you please explain it?
Thank you.
An Emf exists in a coil ONLY when the magnetic field is CHANGING. At the moment when maximum magnetic flux is reached the magnetic field is NOT changing at that moment. (Like a ball reaching maximum height when thrown upward, v = 0 at the top)
@@MichelvanBiezen i also got the same doubt but i could not understand the reason pl.
@@MichelvanBiezen But the magnetic field in your diagram is from a bar magnet. At no point in time in its rotation is the magnetic field CHANGING. The bar magnets field is constant in flux, and maximum at its poles, being rotating by some external mechanical device. Since it's constantly rotating, there is always cutting action. And the max lines of flux are cutting when the poles (N and S) pass a coil, and decrease as it rotates away. Increasing as it approaches. Rinse and repeat...
Should the coil be wound the way you're showing or big coils with one side on 1st and other side on 4th slot?
There are actually a number of different ways the coils can be wound.
@@MichelvanBiezen will the efficiency of the generator increase if the stator cores around which the wire is wound are hollow, like a pipe, because then the magnetic field in the stator will be more near the wound wire, around the sides, unlike a solid rod where magnetic field will be distributed along the cross section?
Thank you.
You're welcome!
How do you teach everything? Excellent !
Because he is one of the best international professor in the world. ....
Someone answer this, if the neutral is a coil and the magnet S\N giving it a flux so why the neutral does not act exactly like a phase, could someone please explain it what is the difference between phase and neutral in this graph
The neutral wire in a 3 phase circuit is used to carry current created by a current imbalance
@@MichelvanBiezen Thank you for the replay my misunderstanding come from the physical similarity between neutral and phase, is the the direction of the spinning decides what coil is neutral? so if counter direction means the neutral will become phase and vice versa
How many times the current flows out in each cycle?
Looks 3 times per cycle?
Each phase reaches a maximum once per cycle.
@@MichelvanBiezen 👍😀
Im having trouble understanding why the neutral is connected to the phases.
I have same issue :(
Star
Wouldn't the voltage of the red at point (1) be at the maximum, not zero? Since the strength of the magnetic field is strongest at the red at point (1). Why not?
The maximum voltage is reached when the CHANGE in magnetic flux through the loop is the largest.
Why would there be 2 coils per line? And why are the 2 coils are directly opposite of each other?
Simple and quick question, to recreate a quick charge for a Tesla with using a 3 phase generator that's equal to the quick charge system, what hp motor would be needed in the drive motor to turn the 3 phase generator? 200 +?
I would contact Tesla with that question. We had 2 houses burn down in our neighborhood already because of their car chargers catching on fire. Better let the experts handle that.
Thank God people are listening. Been trying to contact Tesls with no reply for awhile. I have discovered 2 ways to charge a Tesla using it's own on board power to recharge its systems. This is big. A totally green vehical. Still in the works with a few bugs but 99.9 % it will work. Do you know the ramifications?
Apparently going to Mars must be more important.
This inspired my inquisitive inspiration: ua-cam.com/video/Iw0bd6-yhNw/v-deo.html
Inspiration. ua-cam.com/video/vCgqoqet2zA/v-deo.html
your finger moving not make me clear clockwise or anti clock.pl clear me.
Sir i am from pakistan... I am a student of B.S Physics...your lectures are very great full...Thank you...
Welcome to the channel
Danke
You are welcome.
First I would like to thank you for your efforts on these videos I learned a lot from this video but I am 99 percent sure your graph points are placed incorrectly and I am commenting for people trying to learn this so they dont get confused. When the poles of the magnet are near the coil the force is the strongest and the voltage will be the highest. When the poles are perpendicular to the coil it will be the lowest. Point 1 and point 4 should actually be the maximum positive and maximum negative voltage points on the graph for the red phase C. I saw where someone said point 1 is zero because the magnet is not moving. If this were true there would be no voltage on the other phases as well. But from the graph the magnet is obviously moving and when it approaches the coils the voltage is actually the highest and also the lowest. It is 0 when the magnet is perpendicular to the coil.
I wanted to point out the same thing. Good job!
If the coil wire touch each other ,then will it not work...? Right..!
Indeed, the wires cannot touch each other.
@@MichelvanBiezen connected wire from start to end...in all 3 pase...are if touched any one of coil or other connected coil wire then still it will not work...? So as per ur r saying...all coil required to have a space and connected wire of each pace also required space ( not to touch other connected wire) ....then it will generate power electro magnetic. Right...?
@@MichelvanBiezen thank you for replying...
@@MichelvanBiezen pls make video or explan it here i am subscribe ur channel now ...its shall be reward for subscribe...😳
Note that wires in coils are covered with insulating material. That way when they "touch" they will not short out (allow current to flow between them)
Is that cat okay :(
Yes, that cat is OK and is actually quite content, but once in a while she cries like that for no apparent reason, which can be quite annoying when she does it at 3 in the morning.
The cat is also old and deaf so she can't hear herself "meow".
@@MichelvanBiezen Sorry about your cat and thank you.
Wow...
The cat is complaining about being lost
That kitty is saying "out out". Apparently she's bored of EE topics and would like to go outside.
AA
Awesome video, that helped a lot. Thanks.
Glad you liked it. 🙂