Michele Bucci I feel ya. My teacher didn’t even bother to come to half our classes, and I legit did not even know we had this topic for tomorrow’s test. College sure is fun.
Yep it is bad. Last test tomorrow for tech this year. Glad the teacher is moving to another school. I always have to do my own education (besides in the class) in order not look like a idiot in the field.
it was very helpful. i see people are abusing because of the language and the speaking but it is really helpful for the non-native speakers and learners like us to understand these ambiguous topics while you explain these in simple English. thank you Learning Engineering. keep it up and ignore the English literature "GURUs" in the comment section
Not all single phase squirrel cage induction motors are like this, some use a start relay and start and run capacitors.The capacitors create a phantom phase to get the rotor to spin 360 otherwise you just get locked between the two phases, in other words all squirrel cage induction motors are really three phase, but when you only have single phase power you need capacitors to discharge voltage that induces current and gets the rotor to spin 360, once it's spinning you don't need the capacitor induced current, although you don't get the same horsepower out of a 1 phase motor as you would out of the exact same motor using three phases of power, so the motor is typically de-rated. For industrial applications that use 1 phase power and start under load like mechanical machinery or a water pump, your better off using a phase converter that takes 1phase and converts it to 3phase.
It's amazing how a great video like this with such painstaking visualisation can be uploaded for free on RUclips, and still people complaining because of a missing definite article ('the'). Sense of entitlement.
In single phase motor there are 2 oppositely reovling magentic fields. They will produce opposing torque on rotor. While in 3 phase motor there is only one RMF, so capacitor is not needed.
Nikola Tesla is one of the most underrated geniuses of all time. Many people are familiar with his name but most have no idea of his contributions to science and engineering.
Thank you. Very informative and actually dramatic. A sort of Asperger's Tesla action video with a capacitor as the hero who arrives just in time. Nothing cooler than clear, concise and accurate information.
I know how is the connection of this but for the sake of those who doesnt know it will be more helpfull if the uploader includes how is the connection between starting winding, running winding and capacitor.
yes one neat trick I recently learned is that if your single phase induction motor is humming but not spinning, you can start it by hand, just twist the output shaft in either direction and watch it come to life, this is a dead giveaway that the starting capacitor is bad and needs to be replaced
The only part I don't understand is, once you put the rotating rotor inside the cage, why does it keep rotating and not eventually slow down. I understand the initial imbalance of torque, but once you turn off the auxiliary winding current this imbalance should fade should it not (similar to how if you push something it doesn't keep moving forever, eventually it slows). Eventually the torque due to that initial motion should fade and you should just be left with a net torque of zero??
Annu Aparajita Adding a capacitor changes the phase angle and hence causes difference in the field produced. This will lead to increasing the force for one and decreasing for other
The part of the video concerning why a single-phase induction motor is not self-starting and how it can be started is SO CONFUSING. When you were explaining the reason why the rotor, which is already rotating, will keep on rotating in the same direction after it is put inside the stator under the condition that the current only flows through the main winding, you said the magnetic field produced by the stator will cause the magnetic field inside the rotor to vary and thus induce a current in the rotor, thus "the rotor will start rotating" (which is confusing because you have assumed that the rotor is already rotating before it is immersed in the magnetic field produced by the stator). After that you explained since the net torque on the rotor produced by the two oppositely rotating magnetic fields produced by the stator is zero, the rotor will not start, which seemingly contradicts what you have said before that "the rotor will start rotating". It is better for you to first say that if no current is flowing through the auxiliary winding and the rotor does not have any initial rotation, since the net torque on the rotor produced by the two oppositely rotating magnetic fields produced by the stator is zero, the rotor will not start. And then explain why the rotor will keep on rotating in the same direction if the rotor has initial rotation. Finally tell us the initial rotation is provided using the auxiliary winding connecting in series with a capacitor. Last but not least, you forgot to mention that the capacitor introduced a phase difference between the main and auxiliary windings, so the sum of the fluctuating magnetic fields produced by the rotor and the stator will become a rotating magnetic field. If the auxiliary winding is not connected to the capacitor, even if there is current flowing through the auxiliary winding, there will be little phase difference between the main and auxiliary windings, so the sum of the fluctuating magnetic fields produced by the rotor and the stator will still be a merely fluctuating but not rotating magnetic field and the rotor still cannot start.
I have watched the video till the end hoping to find additional informations about the working of the centrifugal switch, in the end only its name was mentioned...no luck Anyway nice video 👍
@@RiddaAneas You can have the transcription on youtube. Just click on the " ... " icone under the video. Then you can see a menu with " open the transcription area". Just click on that and you will see all the text of your video on the right part of your screen, next to the video. So to answer you question, the guy says : " But here we have got 2 opposite rotating ... "
Back that days Nicola Tesla was born in imperial Austria, studied in imperial Austria and even worked a while in imperial Austria. Please correct, thanks.
I thought the capacitor knocked one coil off by a few degrees, which imparted a torque? essentially creating a two phase motor until the capacitor circuit switches off...
If you look at the magnetic field directions you'll notice that their resultant will point to one direction for a while and then it will reverse. So the motor shouldn't be able to rotate properly. It should try to go clockwise and then counter clockwise.
I am confused. Question 1: Does the capacitor only serve to help start the motor or it is required during the normal operation of the motor? Question2: Why does the motor keep on rotating(with or without load) if there are two counter rotating magnetic field which have same magnitude and angular velocity. I thought the field which rotates opposite to the rotor should produce more torque on the rotor and therefore it should slows down, shouldn't it?
A 1: The capacitor is wired in series with the auxilery winding and causes the current to lead the current of the main phase winding. A 2a: This is a little more difficult to explain due to the rotor's magnetic field being induced by the magnetic field of the stater. Think of the rotors field as trying to catch-up to the stater. The momentum/friction of the rotor and the resistance of the rotor causes a delay in its induced field. This delay causes the rotor to follow the stater. A2b: If the rotor is stationary the rotor will not move because its induced field will not be perpendicular to the stater, thus producing no torque.
Nice video !! :) Btw , if the auxiliary winding produces 2 fields rotating in the opposite directions , and if it cancels out one of the fields in the main winding , then it must cancel out the other one also right ?
@@josemariavivanco9611 Imagine the main winding magnetic field as a vector in space that is perpendicular to the magnetic field vector of the auxiliary winding. The resultant vector ( or resultant magnetic field) will be at an angle. This will act as the primary magnetic field that will induce EMF in the rotor) I hope that helps :)
If you just consider that rotor has 2 magnetic field and the auxiliary winding cancels out one. Then one magnetic field will be still remaining. Practically speaking it cancels out all the magnetic fields which have the same direction which are actually opposing the rotation and lets the motor rotate in just a single direction until it has reached the at the point where the auxiliary winding is not required. (At least that's what I thought please correct me if I'm wrong)
the video forgot to mention that the capacitor causes a phase difference between the main and auxiliary windings. So thats why only one magnetic field is cancelled and the other is added up. Also the position of the auxiliary winding and the capacitor affects how much phase difference there will be between the main and auxiliary windings
when an ac supply is given to the auxillary winding ,it will produce two oppositely rotating magnetic fields ,you said that it will cancel out one of the main winding's magnetic field.but how is this possible? -a and -b be the rotating magnetic field of auxillary winding and let a and b be the magnetic field of main winding .Then -a+a -b+b = 0? So then the rotor should buzz again right?
Great video🙌 2:28 But can anyone understand how the forward torque becomes greater than the backward torque. Since the rotor emf induced by the backward rotating field is greater than that induced by the forward rotating field?
2:55 Nikola Tesla wasn't a Yugoslavian, he was a Serbian born in Smiljan (in Austro-Hungarian Empire), which was after WWI a part of Kingdom of Serbs, Croats, and Slovenes, which later changed its name in Kingdom of Yugoslavia, and after WWII changed to Socialist Federal Republic of Yugoslavia, and after Yugo wars it's now in modern Croatia. Tesla went to America long before all of that and made his inventions there, so you can say that he was a Serbian-American inventer.
Doesn’t the capacitor just create a phase shift for the secondary winding so you have 2 different phases at different degrees to start the rotor rotation? I was under the impression almost all single phase induction motors were actually a 2 phase setup for start or start/run operation. Maybe thats what this video tried to explain but I think it just confused the hell out of me or I learned wrong years ago. This hurt my brain! I have no idea how I ended up here. I got lost in RUclips again.
This is amazing! But could you please tell me why do the two sets of blue current flow in the opposite direction to each other at 1:50? Thank you PS.I was trying to apply Flemming's left hand rule but the two parameters , current and force, were initially unknown at the squirrel cage in the first place. So I can't solve the problem.
This is a case of current carrying conductor rotating in a magnetic field so instead you should be applying flemming's right hand rule. Also at 1:51, you can see that the opp directions of the blue induced currents because of the corresponding current in the main winding shown beside it.
i didnt understand the capacitor part for the self starting...if the auxiliary winding produces 2 fields rotating in the opposite directions , and if it cancels out one of the fields in the main winding , then it must cancel out the other one also right ?
Why the auxiliary winding needs to be cut after the rotor starts rotating? Isn't it better to have a single strong rotating field at all times, instead of two opposite weaker rotating fields?
Can anyone among u clear my basic concept about how the 2 rmf created by Auxi winding only cancels 1 rmf of main winding & strengthend the other??? Should it not b cancel out both???
3:26 The auxillary winding will also produce 2 oppositely revolving mag fields and how will it cancel one torque if the other gets added up? If one torque is added up then the other , the opposite one, will also get added up right?
opposite wrt one of the 2 already rotating mag fields so effect of 1 mag field will be cancelled by one of auxilary winding and other will add up with auxilary winding hence torque on cancelled side will be zero and will increase on side where mag fields are added
You should have the grammar of you translation checked by someone with a linguistic formation. There are quite a few mistakes in the use of articles in this video. Still, great work!
sir there is a huge problem , if there is two force present in opposite direction then one will cancel other one resulting the motor to move only in inertia. and there will be huge powerloss
I have question. When auxiliary winding also produce 2 opposites RMF, how can it makes one of then cancel main winding RMF and the other will get it up? I mean if theres 2 group of 2 opposites RMF, wouldnt they all cancel one another, and left no resultant?
Because of the capacitor. If you power the auxiliary without the capacitor, they will indeed have little resultant. With a capacitor in the auxiliary, a delay will be added to its 2 RMF, they will not be rotating together with the main's 2 RMF, they will be late by some angle. You can choose that angle by getting the capacitance value right, this way you can add the exact phase difference you want between the auxiliary and the main winding so one cancels out and the other adds up.
erm, an induction motor is supposed to be brushless, so how is the centrifugal switch mechanically on the rotor but electrically on the stator if there are no brushes? I assume this is considered a minor detail since the brushes would only carry current to the auxilliary winding during startup and thus not suffer from arcing damage as much - but they would still experience some friction wear. Also the brushes would connect for all 360 degrees of revolution unlike a dc motors commutator brushes so arcing would be less than for a commutator.
I'm still wondering why wouldn't the 2 opposites magnetic fields create by the auxilary winding don't cancel each other ? instead 1 actually cancel the magnetic field of the main winding and 1 enhance the other of the main winding ?
I still don't understand it. If the fields cancel each other out then how does giving it a nudge in either direction allows it to turn in that direction continuously. Is this like in space where a push in any direction can give continuous motion in that direction as there is no friction? Do these fields cancel out friction? Wouldn't you think that the start from the start winding would only last for a brief few rotations?
Why most of all on RUclips explaining the principle of this kind of motor they didn't include their explainations on why and how this rotating magnetic or electromagnetic field does rotation,and how and why this polarity exchanged 🤔🤔 including "lasics"....is it by ac current that change polarity constantly???......
LE, thanks for answering! What is still don't understand very well is from where this double and oppositely reovling magnetic field is coming from? And why the 3 phase only have one RMF? Sorry for my questions but I am really trying to understand better then just this animation.
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The only sad part is that a free video on youtube is more effective than the lessons at the college that i'm paying for...
Michele Bucci I feel ya. My teacher didn’t even bother to come to half our classes, and I legit did not even know we had this topic for tomorrow’s test. College sure is fun.
Feel you, across the world.
Seems like some educators all around the world aren't working the way they should. Din know it's a problem there too.
Yep it is bad. Last test tomorrow for tech this year. Glad the teacher is moving to another school. I always have to do my own education (besides in the class) in order not look like a idiot in the field.
🤣😂🤣😂
it was very helpful. i see people are abusing because of the language and the speaking but it is really helpful for the non-native speakers and learners like us to understand these ambiguous topics while you explain these in simple English. thank you Learning Engineering. keep it up and ignore the English literature "GURUs" in the comment section
Complicated things made simple using such an extraordinary animation effects. It was a very helpful video. Thank you very much !!!
Not all single phase squirrel cage induction motors are like this, some use a start relay and start and run capacitors.The capacitors create a phantom phase to get the rotor to spin 360 otherwise you just get locked between the two phases, in other words all squirrel cage induction motors are really three phase, but when you only have single phase power you need capacitors to discharge voltage that induces current and gets the rotor to spin 360, once it's spinning you don't need the capacitor induced current, although you don't get the same horsepower out of a 1 phase motor as you would out of the exact same motor using three phases of power, so the motor is typically de-rated. For industrial applications that use 1 phase power and start under load like mechanical machinery or a water pump, your better off using a phase converter that takes 1phase and converts it to 3phase.
Or centrifugal switch
I feel like young student in your classroom at
the age 63. Thanks Sir.
It's amazing how a great video like this with such painstaking visualisation can be uploaded for free on RUclips, and still people complaining because of a missing definite article ('the'). Sense of entitlement.
In single phase motor there are 2 oppositely reovling magentic fields. They will produce opposing torque on rotor. While in 3 phase motor there is only one RMF, so capacitor is not needed.
3d animation of any system is like imagination of our mind so nice imagination.....
These videos made life of engineering students way easier.... We don't have to imaging anymore.
Nikola Tesla is one of the most underrated geniuses of all time. Many people are familiar with his name but most have no idea of his contributions to science and engineering.
The simplest explanation. Thank you all.
Thank you. Very informative and actually dramatic. A sort of Asperger's Tesla action video with a capacitor as the hero who arrives just in time. Nothing cooler than clear, concise and accurate information.
Thanks- this helped me figure out a problem with my pump motor
I know how is the connection of this but for the sake of those who doesnt know it will be more helpfull if the uploader includes how is the connection between starting winding, running winding and capacitor.
Awesome visualisation.... Better than any class that would take 1 hour to explain this 4 min stuff..
Wish these vids to be added as reference in the syllabus
yes one neat trick I recently learned is that if your single phase induction motor is humming but not spinning, you can start it by hand, just twist the output shaft in either direction and watch it come to life, this is a dead giveaway that the starting capacitor is bad and needs to be replaced
Superb explanation for ee engineering students
I appreciate the simplified sentence structure.
all the videos are amazing!!! keep up the good work! life saver!
+priyam Gupta Thank you :)
+Dave batista to help create initial rotation
+
Dave batista
Priyam Gupta.. Ya
LOVE U
The only part I don't understand is, once you put the rotating rotor inside the cage, why does it keep rotating and not eventually slow down. I understand the initial imbalance of torque, but once you turn off the auxiliary winding current this imbalance should fade should it not (similar to how if you push something it doesn't keep moving forever, eventually it slows). Eventually the torque due to that initial motion should fade and you should just be left with a net torque of zero??
I'm stuck in the exact same question, I can't understand why it don't slow down when initial rotation is applied
I want all this videos to explain details about basics and add some more topics in easier way
Annu Aparajita Adding a capacitor changes the phase angle and hence causes difference in the field produced. This will lead to increasing the force for one and decreasing for other
Yes it does increase the horse power but can also create more ampage causing the motor to over work and burn out it is a very fine line to work with
Aaron Melbourne you don't know much about motors did ya?
5 years later and you still got no response 😂
@@melbose Mahn stfu
The part of the video concerning why a single-phase induction motor is not self-starting and how it can be started is SO CONFUSING. When you were explaining the reason why the rotor, which is already rotating, will keep on rotating in the same direction after it is put inside the stator under the condition that the current only flows through the main winding, you said the magnetic field produced by the stator will cause the magnetic field inside the rotor to vary and thus induce a current in the rotor, thus "the rotor will start rotating" (which is confusing because you have assumed that the rotor is already rotating before it is immersed in the magnetic field produced by the stator). After that you explained since the net torque on the rotor produced by the two oppositely rotating magnetic fields produced by the stator is zero, the rotor will not start, which seemingly contradicts what you have said before that "the rotor will start rotating".
It is better for you to first say that if no current is flowing through the auxiliary winding and the rotor does not have any initial rotation, since the net torque on the rotor produced by the two oppositely rotating magnetic fields produced by the stator is zero, the rotor will not start. And then explain why the rotor will keep on rotating in the same direction if the rotor has initial rotation. Finally tell us the initial rotation is provided using the auxiliary winding connecting in series with a capacitor.
Last but not least, you forgot to mention that the capacitor introduced a phase difference between the main and auxiliary windings, so the sum of the fluctuating magnetic fields produced by the rotor and the stator will become a rotating magnetic field. If the auxiliary winding is not connected to the capacitor, even if there is current flowing through the auxiliary winding, there will be little phase difference between the main and auxiliary windings, so the sum of the fluctuating magnetic fields produced by the rotor and the stator will still be a merely fluctuating but not rotating magnetic field and the rotor still cannot start.
aaaaaaaaaaaaaaaahhhhhhhhhhhhh. thank you. god DAMN i needed this post. thanks man
I know their videos aren't the best
boss
Thank you, man, you are awesome!!!
thanks for your explaination it saves from reading 20 pages pdf
Keep it up with this type most Interesting videos for study of electric engineering
I have watched the video till the end hoping to find additional informations about the working of the centrifugal switch, in the end only its name was mentioned...no luck
Anyway nice video 👍
These videos worth alot.......💯💯
Nice video bro
Very good graphics showing net magnetic field of rotor squirrel cage. Thank you
Thanks for this video, it was very informative. At 0:54, isn't North and South supposed to be the other way?
The lack of the word the is killing me
I was just about to comment that. The word "the", as well as plurality of words.
me too, I can't understand what he said at 2:08
@@RiddaAneas You can have the transcription on youtube. Just click on the " ... " icone under the video. Then you can see a menu with " open the transcription area". Just click on that and you will see all the text of your video on the right part of your screen, next to the video.
So to answer you question, the guy says : " But here we have got 2 opposite rotating ... "
Rip 🙏🏻🤗
This is awesome. All animated and visualised points.Thank you.
Great Video . Really supplemented my awesome teachers uber fun lessons. Gerry Rocks!!!!
Thaks ENGINEERS for this beautiful world
Teri mki
These videos are really helpful. They should have more views!
Back that days Nicola Tesla was born in imperial Austria, studied in imperial Austria and even worked a while in imperial Austria. Please correct, thanks.
Phantastic explanation
Excellent explanation sir
So well made
I thought the capacitor knocked one coil off by a few degrees, which imparted a torque? essentially creating a two phase motor until the capacitor circuit switches off...
no...both the winding are connected to the same source...so technically this is single phase motor
I understood clearly. Thankyou sir
If you look at the magnetic field directions you'll notice that their resultant will point to one direction for a while and then it will reverse. So the motor shouldn't be able to rotate properly. It should try to go clockwise and then counter clockwise.
I am confused. Question 1: Does the capacitor only serve to help start the motor or it is required during the normal operation of the motor? Question2: Why does the motor keep on rotating(with or without load) if there are two counter rotating magnetic field which have same magnitude and angular velocity. I thought the field which rotates opposite to the rotor should produce more torque on the rotor and therefore it should slows down, shouldn't it?
A 1: The capacitor is wired in series with the auxilery winding and causes the current to lead the current of the main phase winding. A 2a: This is a little more difficult to explain due to the rotor's magnetic field being induced by the magnetic field of the stater. Think of the rotors field as trying to catch-up to the stater. The momentum/friction of the rotor and the resistance of the rotor causes a delay in its induced field. This delay causes the rotor to follow the stater. A2b: If the rotor is stationary the rotor will not move because its induced field will not be perpendicular to the stater, thus producing no torque.
Nice animation.. easy to understand
Nice video !! :)
Btw , if the auxiliary winding produces 2 fields rotating in the opposite directions , and if it cancels out one of the
fields in the main winding , then it must cancel out the other one also right ?
That is exactly the same question I was about to ask. By any chance, have you come up with a solution?
Jose Maria Vivanco
RELAX guys.
I have one of this motor and it’s working flawless. Don’t bother with those “self canceling” magnetic fields. 😉
@@josemariavivanco9611 Imagine the main winding magnetic field as a vector in space that is perpendicular to the magnetic field vector of the auxiliary winding. The resultant vector ( or resultant magnetic field) will be at an angle. This will act as the primary magnetic field that will induce EMF in the rotor) I hope that helps :)
If you just consider that rotor has 2 magnetic field and the auxiliary winding cancels out one. Then one magnetic field will be still remaining. Practically speaking it cancels out all the magnetic fields which have the same direction which are actually opposing the rotation and lets the motor rotate in just a single direction until it has reached the at the point where the auxiliary winding is not required. (At least that's what I thought please correct me if I'm wrong)
the video forgot to mention that the capacitor causes a phase difference between the main and auxiliary windings. So thats why only one magnetic field is cancelled and the other is added up. Also the position of the auxiliary winding and the capacitor affects how much phase difference there will be between the main and auxiliary windings
This is exactly what I needed 👍
Thanks for explaining so nicely
Really good explanation with good visuals. Understood it clearly.
Very good explanation
Great video ,easy to understand
What do u use for making such videos
Thank you for your wonderful animation!!!!!!........was really helpful
excellent job bro
all ur videos are good to understand
i think u revolution will be possible
Thank uuuuh very muchhhh ❤❤🥰🥰🥰🥰🥰
Great visualisation
when an ac supply is given to the auxillary winding ,it will produce two oppositely rotating magnetic fields ,you said that it will cancel out one of the main winding's magnetic field.but how is this possible? -a and -b be the rotating magnetic field of auxillary winding and let a and b be the magnetic field of main winding .Then -a+a -b+b = 0? So then the rotor should buzz again right?
please clear this doubt?
I've also the same doubt, have u find ur amswer mate??
If u have, then pls explain me so that my doubts will b cleared...
Thank u
I thought it started like broooom broooooom broooooooooooom
💀💀💀
Great video🙌 2:28 But can anyone understand how the forward torque becomes greater than the backward torque. Since the rotor emf induced by the backward rotating field is greater than that induced by the forward rotating field?
Unique is every videos,thanks
NICE VIDEO BY THE WAY!!!
Remember the old version of this video...
2:55 Nikola Tesla wasn't a Yugoslavian, he was a Serbian born in Smiljan (in Austro-Hungarian Empire), which was after WWI a part of Kingdom of Serbs, Croats, and Slovenes, which later changed its name in Kingdom of Yugoslavia, and after WWII changed to Socialist Federal Republic of Yugoslavia, and after Yugo wars it's now in modern Croatia. Tesla went to America long before all of that and made his inventions there, so you can say that he was a Serbian-American inventer.
yes and I can't find a single source that says that he came up with the capacitor start idea
Excellent video
Hey bro you are such a great video
Awesome channel..❤️❤️❤️
Very helpful content..🔥🔥
Looked up things about motors and got this 7yo vid
Doesn’t the capacitor just create a phase shift for the secondary winding so you have 2 different phases at different degrees to start the rotor rotation? I was under the impression almost all single phase induction motors were actually a 2 phase setup for start or start/run operation. Maybe thats what this video tried to explain but I think it just confused the hell out of me or I learned wrong years ago. This hurt my brain!
I have no idea how I ended up here. I got lost in RUclips again.
This is amazing! But could you please tell me why do the two sets of blue current flow in the opposite direction to each other at 1:50?
Thank you
PS.I was trying to apply Flemming's left hand rule but the two parameters , current and force, were initially unknown at the squirrel cage in the first place. So I can't solve the problem.
This is a case of current carrying conductor rotating in a magnetic field so instead you should be applying flemming's right hand rule.
Also at 1:51, you can see that the opp directions of the blue induced currents because of the corresponding current in the main winding shown beside it.
great tutor, many thanks!!!!!!!!!!!!!!!!!!!!!!!!!
Can u also explain another subjects like mathematics
GOOD JOB BOSS...KEEP IT UP... UPLOAD MORE
thanks and wecome to india
very nice explanation,Thank You
@0:54 correct flux lines, wrong poles. Flux lines should exit from N, enter to S.
i didnt understand the capacitor part for the self starting...if the auxiliary winding produces 2 fields rotating in the opposite directions , and if it cancels out one of the
fields in the main winding , then it must cancel out the other one also right ?
bhag chutiye XD
dono feild opposite h ek dusre se
its likt 2-(-2)=4 and other one is simply 2-2=0
Why the auxiliary winding needs to be cut after the rotor starts rotating? Isn't it better to have a single strong rotating field at all times, instead of two opposite weaker rotating fields?
This video was really helpful!! Thank you.
Can anyone among u clear my basic concept about how the 2 rmf created by Auxi winding only cancels 1 rmf of main winding & strengthend the other???
Should it not b cancel out both???
Awesome video
Best explanation ever
Awesome video 👏
Should the magnetic field polarities shown at 0.55 time of the video be reversed according to the arrows current flow?
3:26 The auxillary winding will also produce 2 oppositely revolving mag fields and how will it cancel one torque if the other gets added up? If one torque is added up then the other , the opposite one, will also get added up right?
opposite wrt one of the 2 already rotating mag fields so effect of 1 mag field will be cancelled by one of auxilary winding and other will add up with auxilary winding hence torque on cancelled side will be zero and will increase on side where mag fields are added
What happens introducing an inverter? If present, would the auxiliary winding still be needed?
You should have the grammar of you translation checked by someone with a linguistic formation. There are quite a few mistakes in the use of articles in this video. Still, great work!
what a great channel this is!
sir there is a huge problem , if there is two force present in opposite direction then one will cancel other one resulting the motor to move only in inertia. and there will be huge powerloss
Beautiful explaination
I have question. When auxiliary winding also produce 2 opposites RMF, how can it makes one of then cancel main winding RMF and the other will get it up? I mean if theres 2 group of 2 opposites RMF, wouldnt they all cancel one another, and left no resultant?
Because of the capacitor. If you power the auxiliary without the capacitor, they will indeed have little resultant.
With a capacitor in the auxiliary, a delay will be added to its 2 RMF, they will not be rotating together with the main's 2 RMF, they will be late by some angle. You can choose that angle by getting the capacitance value right, this way you can add the exact phase difference you want between the auxiliary and the main winding so one cancels out and the other adds up.
erm, an induction motor is supposed to be brushless, so how is the centrifugal switch mechanically on the rotor but electrically on the stator if there are no brushes?
I assume this is considered a minor detail since the brushes would only carry current to the auxilliary winding during startup and thus not suffer from arcing damage as much - but they would still experience some friction wear. Also the brushes would connect for all 360 degrees of revolution unlike a dc motors commutator brushes so arcing would be less than for a commutator.
I'm still wondering why wouldn't the 2 opposites magnetic fields create by the auxilary winding don't cancel each other ? instead 1 actually cancel the magnetic field of the main winding and 1 enhance the other of the main winding ?
Absolute masterpiece
Thank you
I still don't understand it.
If the fields cancel each other out then how does giving it a nudge in either direction allows it to turn in that direction continuously. Is this like in space where a push in any direction can give continuous motion in that direction as there is no friction?
Do these fields cancel out friction?
Wouldn't you think that the start from the start winding would only last for a brief few rotations?
Good Explaination
great video , sir can u upload video on power system
you're a life saver , THANKS
Why most of all on RUclips explaining the principle of this kind of motor they didn't include their explainations on why and how this rotating magnetic or electromagnetic field does rotation,and how and why this polarity exchanged 🤔🤔 including "lasics"....is it by ac current that change polarity constantly???......
LE, thanks for answering! What is still don't understand very well is from where this double and oppositely reovling magnetic field is coming from? And why the 3 phase only have one RMF? Sorry for my questions but I am really trying to understand better then just this animation.
I believe this is a single phase motor.
Thanks for explaining. 😊