How does an Induction Motor work?
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- Опубликовано: 20 сен 2024
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The invention of induction motors permanently altered the course of human civilization. This hundred-year-old motor-invented by the great scientist Nikola Tesla-is the most common motor type, even today. In fact, about 50 percent of global electric power consumption is due to induction motors. Let’s get into the workings of induction motors, or more specifically, into Nikola Tesla’s genius thinking.
Voice over artist : www.fiverr.com...
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This one 6min video = one week of university lecture
well done!!!!
pretty accurate :)
We learned this in highschool
can't agree more
@@smrtfasizmu6161 you mean you were exposed to some watered down explanation. This video is pretty watered down itself. Electromagnetism is one of the hardest physics topic you'll learn in college.
@@smrtfasizmu6161 We would have learned it in high school too if you Russians hadn't taught us to argue about chopping off dicks all day long in Commie-school. We need to get back to proper education, not foreign language and foreign sex classes.
I can't even begin to understand how Tesla managed to visualize this thing in his brain
Very simple: by copying the patent drawings of the first dynamo, invented by the italian Antonio Pacinotti in 1860 and marketed by the french Gramme in 1869; then copying the patent and the drawings of the first induction motor (two-phase), invented by the italian Galileo Ferraris in 1883, three years before Tesla's patent. Not everything that is electric was invented by Tesla 😉
@@andreacosta74 yeah yeah yeah save all that bullshit tesla invented it
The easiest way to imagine it, is to imagine 2 magnets. Because that's all electricity is. The N and S ends attract.. and The N and N ends repel each other. So while one winding is attracting(pulling) one of the armature poles, the one previous winding is repelling(pushing) it. Helping it rotate. Since it's AC, the one that was attracting, is now going to repel it with it then completing the cycle(1 hertz).
One knows the basic effect of fields, the rest is a series of logical steps.
No.Tesla was the smartest person to ever live. He was hit by lightning some day near a river and that hit connected a oart of his brain that made him a genius. He could read once a book and remember all.He didnt copy anyone , the others copied him. There are so many other inventions of him that in mear future we will use them such as wireless electricity.Also tesla wasnt serbian but jis parents were originated from north albania
I much prefer this narrator, sounds much more genuine. Huge improvement.
The recent poll I conducted on my Patreon page gave the opposite result. I am confused now :(
A very popular RUclipsr making a comment on a video 3 years ago, and getting no replies except the video creator? I've just found a unicorn!
@@specialopsdave You deserve a like
*question* which software you use to make these videos
@@Lesics Simple explanation - the majority of the survey answers are wrong :/ This narration is excellent.
Man this is insane! You will make guys clear engineering courses in months like such tutorials! Awesome video! Keep it up!
Dear friends, Should I delete the old Induction motor video? This video is an improved version of our old Induction motor video.
ruclips.net/video/LtJoJBUSe28/видео.html
The new video has more information and better graphics.
Learn Engineering sure why not. There is no point in having two similar videos. Great video btw 😎🙏
Learn Engineering yes delete the old version video and post the latest one for the info and knowledge for all of us, as subscribers and followers.thank you
Learn Engineering i watched both the videos back to back ....
I think this new video covers everything from previous video and extra ....
So no harm in deleting the 0ld one ....Best wishes :)
Learn Engineering No, don't delete the old video. Just change the title and put the link to this video in the description
Nax FM due to your hardwork
I just had a chapter on induction motors for my HVAC class. This helped me cement my understanding of an induction motor. Thanks for the video!
Dear friends, Please don't forget to support our educational service at www.patreon.com/LearnEngineering
Learn Engineering The New Logo for Learn Engineering is good!👍👍👌👌
I have a suggestion for your Logo. You should design your Logo like
#Blueprint. and
#RoughEngineeringSketches of one and more
#SimpleButInteresting
#TechnologicalObjects (such as
#WindMills,
#SolarPanels,
#Rockets,
#ElectricalMotors,
#ProjectileMotionWithPathDiagrams , et cetera)
and at the centre of them there should be written in Block Letters,
#LearnEngineering .
Thank you!
😊☺☺😊
Thank you Rajesh for the suggestions. I will consider it seriously.
Learn Engineering -please make solar system on grid and off grid how it works
For supporting green energy source
You Are Welcome Learn Engineering!☺☺
Can you upload a video how headphone or earphones work or something like that
Nobody has any concept of what a "squirrel cage" looks like. I use the term to my students but then tell them "hamster wheel". Everyone always goes, "Aaah!"
22 years since i started as an apprentice winder and induction motor mechanic, this was nice to see, good job and very well explained. 👌
I want learn more abt Induction motor s
@@venushinde17 no
Hi sir,
One doubt
The induction motor rotor core doesn't have any electricity in it.
But how it is running
Then why it is angled
@@karthikeyanthecenterofattr2718 I have an old one in which that isn't angled. So that's not necessary apparently
@@ratubgn1237 abe chal phit tera chacha bhi ake sikhayega. 😡😡
Great work distilling the concepts involved in such a visually-appealing and intuitive way!
Wow... The way you connected theory part with the practical part keeping it as simple as possible with a neat explanation is very good.
I can't believe how easy it is to understand induction motor and the speed controller. Thank you for a Great lesson.
Yeah!!!
Exactly
This is pure genius in my believe. I mean, the slickness of the design and the creativity that must have gone into idealizing and crafting a motor that functions in this way is simply outstanding. Tesla was truely amazing
Once every few hundred years, a person exhibits a level of scientific or technological acumen high enough and powerful enough to qualify them as beyond genius: DaVinci, Tesla...these two were quantifiably 300-500 years ahead of their time.
@@davidsirmons I would say tesla was 100-200 years ahead, but he was a genius nonetheless.
Damn i wish you tube was around when i went to high school...
A superb explanation with excellent graphics. You really cracked it here! I've worked with these machines for 20 years and always struggled to explain them to trainees. Thank you.
the visualization made it so easy to understand.
D/C used to rule the elevator world. As a mechanic, I have changed a few MG sets, that is motor/generator. A/C motor running a D/C generator. Back in the day, D/C motors were easier to control rotating speed, allowing a smoother elevator ride. Then, they developed variable frequency, and A/C motors were back in business!
You don't know how long I've been looking for this very valuable data. Thank you so much !!!
Mr. Raju Rastogi can you explain how induction motor starts?
Raju : brrrrrm brrrrrrrm brrrrrrrrrrrrrrrrrrrrrrr brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmm 😂😂😂😂😂
hahahahahhaha
Im working on a direct current motor that goes Whirrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
Nice starting dude
It has a moment of force, greater when speed is less, due to a rotational field, provided by inductor. At the
time this field has a reaction with the rotor, where a current was induced. This rotor is at shorcircuit.That provides this moment. Current consumption at this time is high
I am searching for this comment
Everytime I see this, I understand the concept better than the previous🤗🤗🤗
One of the best explanations for induction motors / Brammer. Thank you
Index:
00:17 Cutaway view of realistic motor
01:13 Simplified view of winding & stator
02:42 Squirrel cage winding interacting with RMF
03:38 Determining speed of the rotor
05:00 Simple, rugged construction compared to other common electric motor designs
06:06 Induction motor can be used as a generator for regenerative braking
i have suffered from this topic for a week, then 6 minutes video heals me.
The animations are vivid and beautifully edited together with the narration. It brought together a whole morning of textbook reading.
Thanks a lot Learning engineering team. your all videos helping me a lot to have strong concept about electrical engineering. Also thank you for a very nice 3d presentation. You guys deserves respect. Good luck
This is the most wonderful explanation I have found for induction motor. Without this i know nothing about the working. Thank you very much 🙏
College: teachs me this over the course of a few hours, days even
Video:teachs me in under 7 minutes
There are *three points* that may lead to a better understanding of this beautiful video.
*Point 1*
The magnetic field lines of permanent magnets emanate FROM the North pole (by convention.)
In the case of RMFs (ie Rotating Magnetic Fields) the magnetic field lines are directed TOWARDS the North pole (by convention.)
These arbitrary definitions are put in place in order to make calculations easier!
The EXTERNAL region of a permanent magnet is USEFUL for our calculations. In contrast, the INTERNAL region of a RMF is the USEFUL one.
This is because induction motors and alternators DO NOT use the rotating magnetic field lines in the external space (say, outside the cage) for the production of useful work!
The above definitions ensure that we get the correct direction of the magnetic field in our visualizations and calculations.
*Point 2*
How do we choose the CORRECT DIRECTION of the induced (eddy) current *I* (orange arrows) in the CLOSED LOOP of 01:54 ?
First of all the label North pole of the RMF should be interchanged with the label South pole, so that the magnetic field lines are directed *towards* the "new" North pole (please see the older video, which is correct in this respect: ruclips.net/video/LtJoJBUSe28/видео.htmlm40s&list=PLuUdFsbOK_8qVROrfl2M2WSV2xAz-ABVU&index=21 )
Then, using our right hand, we _curl our four fingers_ TO the direction of the induced (eddy) current *around* the *loop* , which acts like a solenoid with one turn. Thus, our *thump* shows the perpendicular direction of the NEW secondary magnetic field, which *OPPOSES the RMF* _(ie, its vertical component to the loop)_ *that created it* , at the shown particular instance, according to *Lenz's* law.
If the current *I* in the loop was taken in the opposite direction, then the induced secondary magnetic field in the loop (use the right hand rule as above) would REINFORCE the RMF that created it, thus leading to a flagrant violation of Lenz's law (violation of energy conservation!)
In other words, *the current in the loop* _(resulting from the back emf that was created by the RMF)_ *produces a magnetic field, that opposes the* _vertical to the loop_ *RMF* component, *which created it!*
*Point 3*
Finally, having determined the shown *correct current direction* in the loop (orange arrow) we use *Lorentz's law* in order to determine the magnetic force direction.
Since F = q (vXB), we again curl our right hand fingers from vector *v* (current direction) TOWARD the *B* vector of our RMF and thus we correctly obtain the force direction (2 green arrows.)
That's all there is to it.
I hope I've helped...
Dear Lesics Team,
Thank you for the excellent videos. These are helping me tremendously in my engineering studies.
Keep up the awesome work.
Regards,
Rajan
South Africa.
Thats what concept is called.
Thank you.
This vidio = the whole electrical department of our university.
❤️
Great job ! Thank you !
I repaired my washing mashine lastly and I didn't know how it really worked, I only saw DC motors. This gave me the response.
i was trying for 40 mins to understand it using the teacher's lecture. You made that possible in 6! Thank you
Superb animation. I don’t know if we can credit everything to Nikola Tesla but I am beginning to understand induction motors more. Thank you 🙂
Waw! such a great explanation with visuals.Thank you so much!!!
what a video . excellent graphics !. I wish we were taught like this back then. I hope the new generation makes full use of this.
wow! beautifully illustrated and explained! loved every bit! It felt like a chore to learn all this but you made it so interesting, thank you LESICS!!
My teacher should've shown this video in our class instead of explaining it in their way
The speed of the turning field (rev. per sec.) is frequency divided by the number of pairs of poles (f/p/2 or 2f/p). The stator can be wound for any number of pairs of poles. So we can have 60 or 30 or 20 or 15 or 12 or 10 or etc turns per sec.
Amazing! It would be really great to see an animation explaining the operation of an Induction Generator.
A lot of work went into producing this video. Very impressive.
Best video on induction machines by far. Could have been better if the equivalent circuits are explained too!=)
Caught me from failing electric machine course thanks man for simplification ❤️
When I become rich business man I will spend some money for your channel.very informative video .
If I'm not mistaken, the b-field lines at 0:55 are pointing in the wrong direction. It is resolved at 1:01 when the rotor is added. Or maybe there is a reason for this that I am not understanding? But to me the first representation looks like the magnetic field lines are in the wrong direction in relation to the north south placement. Please let me know if I am mistaken! Great video, thanks
This is one of the best lectures with the best breakdown ever......please keep it up
Good morning sir
I had come to know and build the theory of SCIG( squirrel cage induction generator)
Plz correct me if I am wrong and I would be "gladfull" full if u make corrections in this
When we connect the SCIG with 3 ph supply to stator and the rotor is coupled to a prime mover
The mg field is being produced in the stator and induced in rotor and now the rotor has its mg field
the rotor is rotated above the synchronous speed i.e -ve slip
Now the stator will be starting to provide supply to the grid
And through the process of induction the mg filed is countinue to produce in rotor
By the help of stator which it's providing supply to grid
Since mg field is producing in stator and induced in rotor
And the direction of mg field is reverse and the rotir directoin is reversed when compared to motor ( SCIM)
Completed engineering without knowing that..now understood.
Thanks
Very well done and a great narrator. Thanks.
This was an extremely well done video, thanks for the final's week assist :)
Just amazing..explained the whole concept within 6 mins very well..thanks
this video is so damn amazing, its been a week i was trying to study concepts of induction motor and this video all of them clear
Wow, awesome. I think every college should teach engineering concepts with this type of animation. Its sooo... Easy to understand.
No words to the video. It has cleared my many concepts related to induction motor. So perfect video. Thank you sir for your efforts. Please even make videos on other core electrical concepts...
Finally now Raju will know how induction motor works
Wow, Tesla invented such a simple and very awesome motor, that guy was truly a genius
I love this… hardly understood the explanations but I will listen again and again till I get it. Nicolai Tesla was such an amazing person, he should have benefited from his inventions instead of dying in poverty!!
Really this is a very nice video.
czas filmu 3:08 w tym rdzeniu żaden prąd nie płynie , ten prąd rozchodzi sie na klatki stojana i na blachy pomiedzy klatkami rdzenia aluminiowego wirnika ,a zmienne pole magnetyczne stojana łapie wirnik za klatki aluminiowe wirnika i następuje obrut .ps napisał : Poland Gliwice ul : łużycka
This is so BRILLIANT!! i wish it was longer
Thank you so much for this! Could you please do a video on the electromechanical induction meter and its working principles? I would appreciate it a lot.
A picture is worth a thousand words. Well done.
Hats off to the video! And to Tesla, of course!
This tutorial caught my interest cause the narrator really explained it all well and I've learned a lot from this video.
In just 6 minutes length of video
It feels like the narrator explain the whole quarter lesson
Thanks to the most genius inventor in known human history. Appreciate it Tesla
I am a huge Tesla fan the man and inventor but while we pay respect to Tesla maybe we should also pay respect to Leonardo Da Vinci. Da Vinci made robots from wood, invented the helicopter, the glider, the submarine, the first diving suit, the parachute and many other things still in use today - like Tesla - he was man ahead of his time.
This is the best video to understand the basic of induction motor. Thanks a ton!
Actually electric cars use permanent magnet rotor syncronous motors because they are even more efficient due to the fact that there are no losses in any rotor windings. Also DC motors are both easier and cheaper to speed control wich is why induction motors are mostly used in constant speed applications, only recently have the price on VFDs and high powered brushless DC motors dropped so much they can be concidered affordable for general applications wich is a bit of a shame because since both BLDC and induction motors have no brushes they are whisper quiet and last forever compared to for example universal motors where the brushes both wear out and make the motor loud as a jetplane (this is why hand held power tools, vacuum cleaners and kitchen mixers are so insanley loud compared to for example a stationary drill press and a refrigerator)
John Pekkala
Not quite. Even though some eletric car companies use permanent magnets, The are some that use induction motors. One of them is called Tesla, which is, by a big margin, the biggest eletric car producer. It's allegedly a move to reduce costs, since rare Earth magnets suffered a reasonable boom in price in about 2011, jumping to a ridiculous ~1000% increase (if i recall correctly). That's mainly due to the increase in demand and limited supply.
Don't get me wrong, Dc brushless motors are currently the most advanced motors. Their permanent magnets however make them a blind shot for high volume, such as eletric cars.
Now, the reason most applications of induction motors are for constant speed has not much to do with the difficulty to control it ( considering nowadays powerful microcontrollers, and developed power electronics ) which nowadays is basically non-existant.
The real reason is that induction motors have a small torque at low
Rpm. Which forces some applications, to make it work at synchronous speed.
Tesla seems to have found a way to circumvent this disadvantage of induction motors. I'm not really gonna discuss this here.
It's true dc motors dropped in price . At least the small ones.
The problem are the magnets.
BLDC ?
As mentioned in the video, induction motors are used in electrical vehicles, which is far from a constant speed application. The new Tesla Roadster 2020 uses a 3 phase 4-pole induction motor.
bldc = brushless dc motors
John Pekkala sir in India the 3 three phase induction motor is fitted in loco motive to get high speed in Lower rpm three phase motors are so efficient and cheaper than any other
understanding this is very hard even with clear explanations and Tesla’s thought about those things are shocking me he was such a genius
How does an Induction Motor Work:
Me: brrr, brrrr, BbRrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
Stop it!
Me: Brr... Brr.. brr....
This video helped me more than weeks of useless university lecture...thanks VET... And really well done guys!!!
What an amazing video and explanation!
Wow, How did you explain this in 2017 nicely?! I am in 2021 but the university Doctors can not explain like you.
thank you
3 hours of university lecture class in one video
Wow what an informative video. Within 6 mins, I finally understand the induction motor rather than in universities.
The New Logo for Learn Engineering is good!👍👍👌👌
I have a suggestion for your Logo. You should design your Logo like
#Blueprint. and
#RoughEngineeringSketches of one and more
#SimpleButInteresting
#TechnologicalObjects (such as
#WindMills,
#SolarPanels,
#Rockets,
#ElectricalMotors,
#ProjectileMotionWithPathDiagrams , et cetera)
and at the centre of them there should be written in Block Letters,
#LearnEngineering .
Thank you!
😊☺☺😊
It woul've been nice if you'd shown the effect on having multiple poles and how the speed changes, but great video
Amazing introductory videos with great visuals! You should keep it up!
BTW, can someone explain me what does he say after 3:45 ? "...the magnetic field will never cut the loop.." I didn't understand that part :( What loop is that?
The loop he is referring to is the rotor bars, which you can compare to a (thick) loop of wire. At synchronous speed, the magnetic fields generated by the stator and rotor are rotating at the same speed, and thus there is no relative movement between the magnetic field and the rotor bars. Faraday's Law tells us that an Electromotive Force (EMF) will be induced proportional to the rate of change of magnetic flux through a closed loop, and as there is no (relative) movement under these conditions there will be no induced EMF (and no torque).
Abdullah yuksel......Hey suppose
RMF is a thief &
Rotor is a policeman
Now you know
If policeman(rotor) is trying to catch the thief(RMF) with same speed he is never going to catch him up.
Later he is saying only when thief(RMF) will slow down , policeman(Rotor) can catch him
A three-phase Induction Motor is Self Starting. When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor begins rotating and the induction motor starts. At the time of starting, the motor slip is unity, and the starting current is very large.
You cant use an induction motor to generate electric current because there is no permenant magnetic field. You need some kind of excitarion current to induce a magnetic field in the rotor for the moving rotor to produce current in the stator windings. And induction motors are also know as asynchronous motor because it is not synchronous because the rotor speed is less than the rotational magntic field. A synchronous motor which is used in electric vehicels has no slip because the motor speed is the sme ws the frequency or rotation of the magnetin field because it has a permanent magnet inside.
Electric cars use both. Some use induction motors, some others use permanent magnets síncronous motors.
On the other hand, there are sincronous motors with different rotor. They can be used as generators. In fact they arr used in wind generators
Very nicely explained, well done.
Cara!!!
Esses vídeos são sensacionais, imperdiveis.
Congratulations.
Its sooo good to see mankind sharing his/her knowledge & a great job doing it
Make more such electrical engineering videos so that we don't waste our precious time to go to the college ....
I remember going to a store one day and seeing a massive Farris wheel
This giant wheel was being moved by 4 small motors each about as big as a shoe box
Seeing that got me thinking
How can we invent such a motor and not even bat an eye lid when we see it do these amazing things like turn a giant ferries wheel or move an electric car
When I was there nobody seemed to think about what was moving that wheel
They just assumed it’s just an electric motor
That’s what I consider to be the most amazing thing about technology the most amazing things are invented but sooner or later they become so common nobody cares
Think about that next time you send someone a text on your 1000 dollar smartphone
Wish I had found this channel early. This is so good explanation.
Thanks for this video. Also thanks to Sir! Nikola Tesla.
This is so genius that I can't even come to comprehend
Thank you for this, I have my intro to power engineering exam soon and this video helped me
Thank you for your knowledge, greetings from Indonesia
Hope the teaching in schools is some thing this similar! Students will easily understand. Unfortunately no one taught physics or any other subjects so simple in my school. Big 👍 for RUclips university! Physics and maths were the most scariest subject for me in school. I never could understand in better way.
Brooooom brooooom brooooooom 😂😂😂😂😂😂
😢
3 Idiots😂
There was zero chance I would have understood this reading notes and books this quickly and intuitively.
Do pumps used for pipes work with the same principle ?
Yes, pumps use an electric motor to drive an impeller
The rotating magnetic field of the asynchronous motor is higher than the rotor speed, and its slip rate is generally between 2% and 6%.
Thomas Edson my ass! The real genius was Tesla!
Nikola tesla my ass! The real genius was Pacinotti
@@silviamontagna7443 no nikola or pacinoti only pubg
@@silviamontagna7443 without Pacinotti there wouldn¿t be a Nikola Tesla?
Even though Tesla seriously worked on induction machines the credit for the basic invention goes to Ferraris. Tesla used rotating magnetic fields (RMF) created from a two phase system. A two phase system (as well as a three phase system) solves the main problem of a single phase feed which represents itself as strong power pulsation between zero and a max value over time. Two phase and three phase systems are both able to provide a totally smooth power flow from the grid. With that prerequisite, a constant torque over rotation angle becomes possible.
Tesla seemed to have been stuck(?) to the idea that the rotor must be "connected" with the feed (two phases). His double loop rotor was the reason for a still considerable pulsation of motor torque, see video "Asynchronmaschine nach Tesla" (in German, there are also references linked). It must be mentioned a two phase system could have solved the pulsating torque issue, which was caused by the (double loop) rotor.
While Ferraris did not have the pulsating rotor torque problem with his massive copper rotor the final solution came from Dolivo-Dobrovolski's invention of the squirrel cage rotor (which fixed Ferraris's drawback of huge magnetizing and eddy currents). At the same time it became clear that the creation of an RMF is better done with three phases (with regard to load on every used wire over transmitted power).
It is sad to conclude but our nowaday's induction machines do not use invention's from Tesla.
@@quellstrom
Yes and pigs can fly like another great (rofl) italian inventor Marconi who invented radio?
Tesla spoke about AC current and 2/3 phase system in his first year of college (1875) in Graz but professors laugh on him because by them it was impossible and yes it was until 15 years later Tesla come to the US and proof them.
The Renault Zoe is using a single phase charger to charge the battery up, then the battery's DC power is Inverted to 3 phase AC by a 3 phase Inverter
btw you failed to mention that an induction motor can't act like a generator unless there's some current (DC) applied on the rotor. Caz it doesn't have a permanent magnet inside
The induction machine operates as a generator if the rotor speed exceeds the synchronous speed, which is a function of supply frequency and number of windings (poles). However, in generator mode the rotor is energised by a prime-mover i.e mechanical input. Three-phase voltage must still be applied to the stator windings, the rotor consumes reactive power and outputs active power, hence the direction of current flow is reversed compared with motor operation. Trust me I'm solid.
I know you're right
He did bruh. Pay attention in the class.😑
Very clear explanation, thank you so much...
Anyone search this for Raju Rastogi😂
Me😂
#3idots
Great video.. Very clear understanding of induction motor.. Thanks
Why are the bars in the rotor tilted?
It helps the Motor to self start. If they were straight it could happen that the Motor won't turn on its own or turn the wrong way.
Also to eliminate the slot harmonics
@@Ing.eliasmendoza6678 what is slot harmonics?
because if they weren't tilted, it would blow up due to the ineffective electromagnetic energy transfer
It eliminates cogging at low speeds.
Would you please make a video about how generators produce Megawatt ? What's the mystery of load angle ?
If you were to explain this phenomenon in term of magnetic field principle, I would certainly say that you are the best instructive and impressive ones on earth !
Thanks a lot