How does an Induction Motor work how it works 3 phase motor ac motor
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- เผยแพร่เมื่อ 19 มิ.ย. 2024
- In this video we take a look at the induction motor to understand how and why it works. We include animations and real world examples to help you learn the basics of induction motor working principles.
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⚠️ *Watch the new version of this video* ➡️➡️ th-cam.com/video/59HBoIXzX_c/w-d-xo.html
Very clear explanation the crux of the induction motor working - much better than some of the higher quality video productions here. In fact most of them
miss to explain the key reason why the rotor actually rotates in contrast to your clear explanation. Thank you !
Hi, very nice video! Since you guys are talking about induction motors specifically, I would also mention that the rotor spins at a slower speed than the stator magnetic field (for an induction motor). The difference between the stator field's speed and the rotor's speed is called the slip speed and is a central object in induction motor control. The animation shows the rotor and stator spinning at the same speed, which is how it works in synchronous motors (synchronous => same => same speed).
Also, the induction motor effectively works something like a transformer (with the stator being the primary and the rotor's bars kind of like a secondary). At least at an undergraduate level, we are taught to model induction motors in a very similar way to the circuit model for transformers.
But, I understand this wasn't supposed to be a very technical overview. For anyone who would like more in-depth information, I suggest the book "Electrical Machines, Drives and Power Systems" by Theodore Wildi. :)
NEW! Check how AC motor works here th-cam.com/video/59HBoIXzX_c/w-d-xo.html
It's funny how the introduction of this video is also the sound of an induction motor starting up. 😁
table saw
Like every video?
In 90-s there was a strategic game called "Totall annihalation", and there was a sound like that when robot producing factory were finishing the one
Great videos, Im retired from electrical field. Power Generation, Electrician, Lineman, Instructor... attended many classes rarely seen electrical basics presented completely accuratly, yes trouble shooting the instructor was my way of countering the boredom at times. You've done an exceptional series here, the subject materiel and supporting visuals are a great balance of keeping it short, simple yet very informative. i look forward to thd more advanced topics you hinted at. Heading over to get that cup of coffee you well deserved!
Quick questio, where can I find a generator other than mechanically driven AC? Just kidding around. Thanks Paul
DAColton
The clearest explanations i have ever seen 😊 Thank you sooooooo... much 😊 i cant believe there would be such an amazing explanation 🤗🤗🤗
Bravo! I love your lessons!
great work, Sir! thank you for the video!
thank you for these videos we are looking for more please keep it up
Just come across this Channel. Great vids, great explanations and a great refresher for me, thank you!
Really nice and clear explanation and presentation with a bonus at the end that made me laugh because of the opposite direction of the shaft. :) but really.... WELL DONE! Thanks!
You nailed it! Thank you so much. You made my day.
Wow this just excellent!
Excellent description
simple but powerful. it is a spoon feed video. Thanks a lot!
Great Video. THX.
i can't thank you well enough! i was loosing sleep because of this but now that i understand i can finally move on
Best Animation !! You showed... Thanks a lot 😀
One important missing part is an explanation of how the magnetic field is induced into the rotor. It is not a permanent magnet, as might be inferred from the animation., but rather is an electromagnet created by the current induced into the squirrel cage bars. How that occurs is not at all obvious, except to Nikola Tesla, who invented it. I, and most of us I think, need to have it explained.
Indeed. The Rotor N and S go around as in the annimation, BUT you are right the bars and therefore the rotor has a very small 'slip' so goes at a little lower speed so the annimation is sadly wrong. Hence the US call it an Asynchronous motor. The small 'slip' is to give us flux cutting and therefore the volts in the rotor bars and the current. It is tricky to annimate well and this one is very close as EVERYTHING is synchronous EXCEPT the rotor. Even the rotor current pattern (as the magnetic fields have to be synchronous.)
Thank you, glad I read the comments first before watching the video. I searched for induction motor to know how the magnetic field is induced since there is no permanent magnets presents.
imagine inventing something only for your last name to be used to name a car brand that uses your technology
NEW! Check how AC motor works here th-cam.com/video/59HBoIXzX_c/w-d-xo.html
Thanks alot for your video here
I found it really hard to understand the squirrel cage but
You explained it well and clear more than our lecturers here.
First time to watch your video
Thanks
Thanks for the video mate, big help and much appreciated 👍. Liked and subbed
Thank you sir because of you i might just get a plant engineering apprenticeship at my job
Same here and I'm really happy about it
This vid is so much quieter than the rest in the series (just letting you know ;))
Excellent video.
Thank you so much!
Thank you guys very much I spent 5 years in the school of engineering never getting a clear vision on this particular concept
Those engineering professors were very bad at getting their point across. I feel some of them are just poor health and burnt out from the other things they were involved in.
Dude, you make nice animations, keep it up. they solve my problems
Thanks a lot friend you are a top-notch teacher
excellent video corresponding how to opposing mangetic fields, one in the rotor and the other in the stator, cause rotational movement. i see these machines in fire pump rooms. thanks
Very nicely explained.
Thanks very much!
perfect logical and conceptual explaination of topic it destroyed all confusion from my mind and made a perfect clear picture with animation
These are great videos!
It's excellent presentation you are very good my friend thank you.
Only 218 comments? I can't believe it!!! You have no idea HOW much I have wanted to understand how a motor worked!!! THANK-YOU!!!!
If you think this was good, you should check out the newer version. Ridiculously better.
How did you find this video btw? I need to update the link to the newer video
Well presented; in particular, the graphics showing how it works is clear.
A bit further on, one could add that 3 phase motors are now often used under variable frequency, to control the speed - loads of them in use as ‘traction motors’ now, both on the roads and the railways. Traction motors are often also used as alternators for regenerative braking, so one could mention that they can be controlled that way round by varying the electrical load, either by charging batteries or feeding back into the supply grid.
To some extent, this became possible due to the advent of high power electronics for dc/ac inverters (IGBT), but that’s another subject!
VFD Video is now live! here: th-cam.com/video/yEPe7RDtkgo/w-d-xo.html
A thought I have many times when working with motors is "Who keeps squirrels in cages anyway?!"
Whenever I heard the term, I always thought of the hamster and mouse exercise wheels rather than actual cages.
It's supposed to be a cage to keep squirrels out.
Obviously an ingenious individual that captures the pesky little varmint then puts it to work spinning its cage similar to the rotor except it relies on squirrel muscle instead of electrical input for rotation. Although direction is random whereas with a three-phase electric motor direction of rotation is easily determined and maintained by changing any two wiring connections.... simplicity itself especially for common backward inclined fans, or pumps in which direction is paramount for proper operation & corresponding amp draw.
Good for basic understanding
Very good job explaining everything keep up the great work
Check out our newer version sooooo much better
Excellent video explanation
Superb ExplanaTi0n❤❤❤
I like the motor firing up at the beginning of the video
Thank you so much for this 🤩🤗🤗😍😍😍!!!!!
You just saved my life, lol 🥰
This new version is far better th-cam.com/video/59HBoIXzX_c/w-d-xo.html
I get it (I think), with 3 phase the gaps between peaks (and troughs) are smaller than with 1 phase, so you get close to a direct current effect which is continuous, hence more power?
Fantastic video
Thanks we love you
very very well
I'm actually a 14-year old with an interest in electrical engineering and I want to say I really enjoyed the video. Thank you very much.
You should be around 17 or 18 now. Are you in college for electrical engineering now?
8:21 Still the BEST explanation I seen
The conductors are in slightly cross because, to prevent the magnetic locking and not for to increase torque 🙂
9:00 Yellow will reach it's peak value first because when analyzing waveforms, we start from t=0 point. Red is in 3rd position. Please correct me if I am wrong. LOVE THE VID THO!!! :)
Awesome content like it:)
Well today is the day I learned that the fan, brings in air to the fins on the ends of the pump keeping it cool wow. But think the cover for the fun, helps guide the win to the fins?
Cool video
wonderfull
Make a video on Armatute windings and methods of starting
love your content !
New induction motor video coming on Wednesday
NEW! Check how AC motor works here th-cam.com/video/59HBoIXzX_c/w-d-xo.html
Hai,
Is it possible to use squirel cage motor Instead of slip ring motor by connecting with vfd and run at lower frequency at the satrting for higher torque purpose?
can you do a vid on radians and how to use them to measure an engine's ability to lift (helicopter) and other uses for it?
Thank u sir
Good
Can you explain control rotation on a 3 phase motor? Ive been told you have to just swap any 2 phases to put then 180 out of phase but i never understood that because there still being a third phase. maybe im overthinking it.
100%concept
Thank you
Please see the newer version, much better
@@EngineeringMindset I just did, thank you so much. Second video simple shows how much you love your work. It's amazing.
How universal motor work on both supply AC as well as DC.
Please make a video 👆👆
Great explanation. I have been looking for a video like this one. But I still struggle to understand the neutral wire for both configuration. Is it internal using the casing or the phase wire doubles for that. Thanks.
th-cam.com/video/59HBoIXzX_c/w-d-xo.html
I think it's helpful to visualize the stator as the primary coil of a transformer, with the shorted field of the rotor as the secondary side of the transformer. That's how the field can be induced into the rotor without brushes. (Tesla's goal was to eliminate the brushes) Asynchronicity (inherent slip) is an important characteristic of induction motors which needs to be explained. This is why they are also referred to as "asynchronous motors". Due to Lenz's law, the rotor has to actually lag behind the rotating magnetic field in the stator for the induced current to occur in the rotor. If the rotor actually catches up, the induced current in the rotor fades away. So the operating speed will always be less than the synchronous speed.
NEW! Check how AC motor works here th-cam.com/video/59HBoIXzX_c/w-d-xo.html
Sir please upload video of berry type transformer deeply. Its useful to all and this topic is no one done correct.
so when north is up ... the sine wave is peaking up +... meaning the flow is counter clockwise, and when the north is down ( south up ) the sine is drawn negative down meaning flow is clockwise? Is that part of the illustration correct is this the orientation of the sine wave thanks!
What device is used to manipulate the magnetic fields on the rotor? I know armatures are used on small dc motors with brush contacts, but how do you make an electrical connection to the moving rotor?
*Update*
I found out that DC motors that use only wire to generate both fields on the rotor and on the stator are referred to as 'Series wound' electric motors. They typically use a commutator with carbon brushes to contact the moving rotor - thus changing which coil is creating a magnetic field on the rotor.
DC motors explained th-cam.com/video/GQatiB-JHdI/w-d-xo.html
My question is: When the rotating stator field induces a field in the rotor, does the rotor chase the stator field or does the rotor get pushed around by the stator field (repelled by the like poles in the stator)? In other words, does the squirrel drive the cage or does the cage make the squirrel run?
Please produce a video of a single phase induction motor with capacitor start/run.
please see our video on circulating pumps
Could you do a video on variable frequency drives?
VFD Video is now live! here: th-cam.com/video/yEPe7RDtkgo/w-d-xo.html
Great videos, compared to other videos, the audio is rather low? Thought it was me, however, the ads attached, are at a uncomfortable level, then your voice is awfully low. Thank you.
the sound is too low,
Pedro Ramirez thank god we can turn our volume up
Our phones have sound buttons for controllingthe sound bro.
I have all volume controls at Max and still cannot hear his lecture
Thanks a lot for all your teaching videos. How do you manage subtitles in foreign langage ? I'm french and even if I'm an english speaker, it would nice to translate in french in a better way than the automatic translation.
It was open to the community to edit but TH-cam removed this feature last week unfortunately.
Do you know we have a French channel? Link :th-cam.com/channels/pVHVdo-eYw_H_-rEXWlsZw.html
Hello the engineering mindset.. . Can you maybe make video how generators/alternator works. Thanks 😊
Already made: th-cam.com/video/jdSKlg80DjU/w-d-xo.html
@@EngineeringMindset ohhh yes thanks you 😊
It is sphase in 120 degree too, right?
i have a question. the wounded coil across the stator plays as an inductor ? or what ? what inductor is used for ?
Do you have any separator videos
Hi :) in 9:33 ithink it should be: "Place the rotor inside", not "Place the stator inside". Right?
Glad I'm not the only one who was confused for a minute haha
In your example at 9:30, your magnetic field is going the wrong way. And in the sine wave the strength actually goes R B Y R B Y, not R Y B R Y B like you explained. Because the after the positive R peak, the next strongest was the negative B peak, then the positive W, then the negative R, then the positive B, then the negative W, the back to positive R.
My electrical engineering professor was excellent, but when I asked him when we get to see motors, he said that's another course. Between Jerome fielding and this , I understand three phase induction motors
Jerome fielding is great at demonstrating these motors with small hand built models.
If the cage end caps are shorted, how is there an organized flow of current on the squirrel cage bars? Ie: how come the current isn't randomized and doesn't make the rotor do weird things?
Re 9.55. Surely opposite poles ATTRACT not repel as stated here and as the rotor lags behind it is pulled round.
Hi Paul, I have a 2-speed motor. How does the motor started change it’s speed?
Probably changes the stator coil connections to give 4 poles N-S-N-S instead of two as shown. Rotor has induced currents so 'changes' without any switch to match the stator. Then it will go half as fast. Check the switch affair. I normally save this for my videos, but mine are not popular Hahahahaha
I do want to know more about motors dor you have any explanation about Three phase motors? Like hysteresis motors? Love your videos it helps me a lot.
So is the magnetic field created on the rotor bars attracted to the field of the stator or repelled by it? Nobody really explains the direction of the induced current on the bars and how we can work this out and the henceforth produced magnetic field, how do we explain the direction of the forces created by induction?
was the hot spot a sign of pontential future problems ?
Yes, the insulation can deteriorate and cause a short circuit.
Hello i had a doubt regarding the same
I was just wondering as it is said that these motors are used to pump water.
So how exactly will the electricity reach there?
If you could help me out with this it will be great.
Regards,
Saisha
Please see our centrifugal pump video, fully explained the motor tok
Does the looped wire need to be insulated against itself. If that makes sense.
plz do same for SINGLE PHASE
Please explain how the capacitors help in starting of a 1-phase induction motor
Hi there I'm a motor winder and mechanic. Essentially there are two types of capacitors used in a motor. A run capacitor and a start capacitor. The run capacitor, which is usually a silver canister, is mostly used for efficiencies these days. It helps to clean up the sine waves and allow for cleaner current. Start capacitors are normally a black plastic canister. These build up a generally much larger charge and are in series with the start windings of the motor. When the motor starts these take on a charge and are discharged into the start windings giving the motor the extra torque needed to start in a short amount of time.
bro please make vedeo about basic principle of operation (AC and DC servo motor with brake) .
DC motors explained th-cam.com/video/GQatiB-JHdI/w-d-xo.html
NEW! Check how AC motor works here th-cam.com/video/59HBoIXzX_c/w-d-xo.html
This would be great if i could hear it
Please see our new version of the video, much better quality
@@EngineeringMindset Thankyou! I should have noticed the new one
I feel like there could be aliens watching this video right now going "holy fuck lets not invade those dudes they are smart as fuck"
Man, can you tack in back emf in this explanation about three phase motors and generators ? Why coils in your examples changed the direction of magnetic field instantly?
Please see the new video on our channel for electric motors
I have one small doubt about how the magnetic field could create or induced another magnetic field , which means that how the stator will create magnetic field to the rotors. I know only when the current passes only magentic field will create can you please explain how it's happening.???
I'm not so sure, but at the minute of 8:29, I think the magnetic field should be vertical instead of horizontal, so please respond to me with the right answer, thanks a lot !
Please see the newer version th-cam.com/video/59HBoIXzX_c/w-d-xo.html
Also, how did you find this old video? Is it linked somewhere. I need to update the link if so
why the rotor bars are skewed ?and how does the skewing woking principle works ?
Causes an unequal magnetic field which helps it spin