ฝัง
- เผยแพร่เมื่อ 17 ก.ย. 2018
- Induction motors have been ruling the industrial world for many decades. In the induction motors used in lift and hoists, you will see a type of rotor called a slip ring rotor, whereas in most of the other applications you will see a simpler, squirrel cage type of rotor. Why are there two different designs of rotor construction for induction motors? We will explore this in the video.
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These videos are gold on youtube
Such an awesome video. Thanks for sharing
yes indeed
Exactly
@3:02 I paused the video and observed. The direction of electro magnetic force shown in the animation is wrong. Use F=Current *(Vector product of L and B)
L= vector having magnitude= length of conductor and directed along the direction of current and B is the STATOR MAGNETIC FIELD VECTOR. Using right hand rule, we get the direction of electro magnetic force to be opposite of that shown in the animation.
Please correct me if I am wrong.
correct
can't stress enough how much I enjoy these vids, thanks for all your hard work guys!
My word thank you so much. My book doesn't really have a great explanation and I could not visualize this. I don't usually leave any comments but you have no idea how much this helped me for the exam I have tomorrow :D
These kind of yt channels are needed for all those students whose teachers teaches physics in a very boring way(literally killing the interest of students in science) , learn engineering is there to save the soul of Physics
Thanku for helping a lot of students
Literally I'm crying 🥺🥺
I may not understand thoroughly the first and second time, but I will be back !! Thank you!
One of your best illustrations yet. Thank you very much!
When explaining about phase increasing or decreasing, perhaps showing a phasor diagram of the current and voltage of the rotor might help.
If you want to know more about slip rings, you can follow my homepage, which contains the conciseness of different slip rings, welcome to watch.
This answer all my questions. It is an incredible video that take a lot of time to make. You are the best. Thank you!
People who really have the teaching skill is on youtube.For a fact they dont exist in universities.
I'm in the process of rebuilding a 3 phase slip ring motor at work. Should be re assembling it tomorrow (Monday). It's cool to see videos like this. keep em' coming.
Had to watch this a few times for it to sink in. The key is the current lag increase due to frequency. The further the rotor current lags behind the max flux in the RMF the less the torque. YES !! Thank you for this.
A lot of work goes into these videos...thanks a bunch folks!
Very good video explaining this, We still have a lot of cranes using wound rotor motors but there days are getting fewer and fewer as we are now just using VFD's and less expensive squirrel cage motors.
Awesome job! We have been doing up grades at our facility on our Mills from DC motors to AC motors with vector drives .We are saving a boatload of 💰 in energy costs. It's all about the drives.Thanks again.
I better get back to work.Converting float sensor in water tower from laser to ultrasonic.Hope we have better luck .Winter is coming.
Thank you so much for simple and good explanation.
Lots of love and respect from india
Can you do some videos about roller coaster mechanics? Things like LIM/LSM, Hydraulic and Pneumatic launch, how catch cars and brakes work, how restraints work, etc
I just invited my 100 students to watch this video as a complement to the analytical/mathematical analysis of the induction motor that they've just seen on the chalkboard. Thumbs up, guys! Excellent work!
@3:02 I paused the video and observed. The direction of electro magnetic force shown in the animation is wrong. Use F=Current *(Vector product of L and B)
L= vector having magnitude= length of conductor and directed along the direction of current and B is the STATOR MAGNETIC FIELD VECTOR. Using right hand rule, we get the direction of electro magnetic force to be opposite of that shown in the animation.
Please correct me if I am wrong.
Wow, interesting! i always thought the resistance was for keeping the motor from drawing too much current during startup, but apparently you can also tune your RL circuit with it, NICE! thanks Learn Engineering
It IS used mainly to prevent high inrush starting current, but I also didn't know about the RL phase angle tuning before this video. I haven't known why induction motors have only around half maximum torque at startup (which is still not that bad)
lesics now
@@Bizzon666 Only Squirrel Cage Induction Motors have a Starting Torque of about 0,5x Nominal Torque to be more precise. If I am not mistaken: Slip Ring Induction Motors have about 1,5x Nominal Torque as Starting Torque.
Hello team! Thank you for the video! It was very helpful!
I have a suggestion for you. An animation on Vibration Motors and Analog and Digital Watches would be very good. Thank you!
Video on Circuit breakers please
Thanks Learn Engineering, your videos are very informative with great visuals. Thanks again.
Beautifully explained and amazing visuals. Thanks!
Thank you for giving deep information about slip ring induction motor
OMG, the best explaination for me to understand industion motor, thank a lot, please make more video about the starting types of motor to reduce starting current,
Thank you very much.
The explanation is very good.
Professional! Thank You.
Incredible graphics and clarity. Thank you!
you guys are awesome.......such things only makes youtube worthy....🙏🏻
Very nice explanation ...Every points are clearly understandable. Thank you so much.
Please do a video on different types of generators.
I love your videos. So much work goes into each one.
Time to compliment! Love your simple visualize easy to follow animation style explanation!! These must take a loooooooooooooooooooooooooooooong time to make! But they make me understand so faaaaaaaaaaaaaaaaaaaaaaaaaaaaaast!!!
Love what you guys do!
Truly Awesome Explanation Thanks
This is absolutely a great vid!
Very very nice, i am principal of a pvt. iti and i found this video very usefull, thanks
no... we thank you.... you guys are he real MVPs
It has helped so much in my exams...
great video. thanks
Your videos are really very helpful 🙏🏻 Thank you so much ☺️
Yes...very excellent video clip for the student who are studying the electronics... Thanks a lot...
Superrrb Awesome Fantastic video
Really good...the best ever in the youtube
text book with video! I love it.
excellent explanation,best in the current you tube videos about slip ring induction motor
Thank you for the great visualization. What an amazing tool TH-cam is, 20 years ago one had to study this from a book and could not figure out anything
If you connect up the slip rings to a drive, you can recover the slip energy and run at variable speed.
Great videos, love than animation and content, very helpful. 🙏👍👌 Thank you!
Thanks for explaining the IM
Really awesome video of working of Induction motor with lucid explanation
That was a phenomenal explanation
This video describes an old application of Slip ring motors, there are four different squirrel cage induction motors nema deisgns to overcome the torque speed characteristic problems. The slip ring induction motors are a lot more interesting as genererators in wind applications (Doubly Fed Induction Generators). Nowadays, the high startup torque and reduce inrush current are adjusted using variable frequency drives.
Damn, these animations are good!
YOU GUYS ARE REALLY GOOD IN THAT, PLEASE CONTINUALLY DOING THIS VIDEOS, BECAUSE YOU ALL ARE AMAZING VERY GOOOOOOOOOOOD PERFECT
Thanks for your great work...excellent
outstanding way of explanation..... :)
So this is how a Synchronous motor works.. Wow, thank you
Great youtube channel for to know about engineering...thanku sir
Thank you. You are the best.
You'r videos are gold.
Thank you for the info.
Thanks for this video
Aapki Team Bahut Achha Kaam kar rahi hai. Hum sikh pate hai. Thanks
Thanks a lot very informative video..👌👌
Awesome explanation. Thanks
The experience was great
Used to love the old RI motors. Few electricians would know how to tune them now days. Single phase 480volt commonly used on farms
Really good videos.....
Keep it up buddies......
We all support you
These graphics are impressive looking and great for getting a high level picture of the operation they may be topo busy to gain thorough fundamental understanding of the operation form my perspective. I kind of suck at this stuff but I'm also not unfamiliar with the concepts.
you deserve great respect man hatsoff
Such a beautiful animation and explanation thanks a lott sir
thank you guys
Thanks , congratulations!!!
A perfect explanation for those who already understand induction motors.
go on ........very good service indeed!!!!!!
Million thanks brother
basically what the video implied was that increasing the rotor reistance would increase the current, because of reducing the phase shift. however i think the phase shift occurs because the current is lower when there is a resistor. i always thought the point of this construction is to lower the starting current and save the rotor from overheating. it could also be helpfull to reduce the phase shift on the primary, because industrial electrical bills tax you heavy for non-resistive-behaving loads (power factor) and is also a good way to maintain high torque over a wider range of rpms, because you can deadshort the rings when the motor get up to rpm and get the same starting torque you had with resistors, but now without them and at much higher speed. if i was to build such a device i would make the reistors part of the rotor and engage/disengage contacts by moving small bearings sliding freely on the shaft but connected to the contacts (something like the concept of a throwout bearing of a clutch)
should place a capacitor across it instead to raise the current and shift phase (/hides behind blast sheild)
Great job ... Over the top
thank you sir..
Fantastic graphics!
I had to watch it twice to understand everything 😅. But the explanation was phenomenal
I watched 10 times but i cannot understand
Imma get to work designing a self-contained version.
@@adhil8918 Should have electrical background... focus on your interest
I was waiting for this video
As advantage too is the important torque at the startup.
A friend from Tunisia.
I love them!
Thanks, fantástic!
Excelent video!!
excellent video , thanks.
Very good thank you!
best animation and explanation. Thumbs up for ur effort ..
Great video
Thanks to team
perfect videos! It helps a lot.
💯🌹💓
Excellent!
Very good explanation and correct theory So far nobody explained ln such detailes
tnq so much... this video help me lot
So much work to do a film like that !!!
Excellent job 👍
This is tantamount to magic for most common folk... myself included.
well, induction is akin to magic.
scientists did not believe it at first either.
Faraday had difficult time convincing others, because he did not receive conventional education himself.
please make a video on variable frequency drives(VFD) and variable voltage variable frequency drives(VVVFd)
Thank you ♥️
Good explanation thanks for your videos
Induction theory is very difficult to explain to a layman. I believe this type of explanation is the best I have seen. Good job.
@3:02 I paused the video and observed. The direction of electro magnetic force shown in the animation is wrong. Use F=Current *(Vector product of L and B)
L= vector having magnitude= length of conductor and directed along the direction of current and B is the STATOR MAGNETIC FIELD VECTOR. Using right hand rule, we get the direction of electro magnetic force to be opposite of that shown in the animation.
Please correct me if I am wrong.
@@abhisekrout8522 Why are you using your right hand? You should be using your left hand.
@@killer2600 To get the magnetic field du to a current flowing through a conductor we use right hand. But yes here in the video if we use left hand everything falls in place. I got a solution to it and have prepared a report on it. In the report I have tried my best to explain why this video could have been represented in another way so that the confusion of why using right hand rule doesn't work here and anyways how magically the use of left hand works (though weird). Please go through the link and correct me if am wrong.
drive.google.com/file/d/1tMBLwAtVLtfxmIj-DqlxEhWVGdzAcU2g/view?usp=drivesdk
@@abhisekrout8522 This is youtube not college lecture class for future electric motor designers so I really could care less about the accuracy of a few arrows. So long as the rotor spins in the same direction as the rotating magnetic field it's good enough for youtube IMO.
@@killer2600 Yeah, you are right but what I feel is animating the stator magnetic field instead of rotor magnetic field to explain the operating principle of an induction motor would be a lot more intuitive. And If I am right then there are some serious errors regarding the current magnitude at different rotor conductors relative to their position wrt the stator magnetic field.