0:19 Simplest DC motor 0:24 Stator, armature, commutator rings 0:42 Lorentz Law 1:20 Torque action nearing zero 2:18 Enhancing magnetic flux interaction 2:30 Spring-loaded commutator brushes 2:53 Parallel (shunt) and series motors 3:13 Series-wound motor (output of stator windings powers brushes in series connection) 3:23 Shunt motor (same power source energizes brushes and rotors in parallel connection) 3:35 Back EMF 3:47 Electromagnetic induction 4:06 Back EMF (proportional to rotor speed) opposes internal voltage 4:24 Large DC motors
+xgenesys There are also subtitles. Great channel and great video. In 3rd class Electrical Machinery II course our professor let us watch this video to introduce us to DC motors.
Thank you. Needed to read up on DC motors and it's a lot harder to understand the construction of these when it's all on paper. The step by step visual presentation made this a lot easier to digest.
Thank you. I'm a mechanical engineering student, I'm taking electric machinery course this semester and you made it a lot easier for me to understand the construction and starting of dc motors. Although it's a too briefed description.
Absolutely great video, thanks a lot. A small note for everyone: Something missed in the video, the armature coils don't exert only back EMF, they exert magnetic field opposite to beneficial flux also. Because of this, at the big powered machines; some extra coils which called "commutation coils" and "compensation coils" being used to get rid of the armature flux.
Basically, The current-carrying conductor produces its own magnetic field which interacts with the external magnetic field of the permanent magnet. This interaction is what moves the wire. If we make the conductor into a squarish U-shaped loop and fit a power source. Then one arm of the conductor will have the current coming towards the power source and the other one going out in the presence of the external magnetic field provided by the permanent magnets. Therefore, one half of the conductor will move upwards and the other half will move downwards and we would assume that the conductor will carry on rotating like this and we would be on our way of having DC motor. Two major problem occurs with this design. One is that the wires will tangle up and another one is that once the coil reaches the vertical position after rotating far enough, it would flip over, so the electric current would be flowing in the opposite direction. Now the forces on each side of the coil would reverse. Instead of rotating continuously in the same direction, it would move back in the direction it had just come. We need to periodically reverse the direction of the current to overcome this problem. So a commutator is used to overcome this problem. In the simplest form, the commutator is a metal ring divided into two separate halves and its job is to reverse the current direction every time the coil makes half a turn. Now since the torque becomes very small when the coil is perpendicular to the magnetic flux, the motion will be very irregular. To overcome this problem, one more loop of coil is added with a separate commutator ring (when the first loop is in the vertical position, the second loop is connected to the power source and therefore a motive force will always be present). To make the rotor motion even smoother, more loops and corresponding commutator rings are added. Next, the magnetic flux interaction is enhanced by fitting the armature loops inside the slots of highly permeable steel layers. And spring loaded commutator brushes help to make contact with the power source. In a practical motor, the permanent magnets are curved in a circular shape so it almost touches the coil of wire that rotates inside it. The closer together the magnet and the coil, the greater the force the motor can produce. DC motors are used for small applications like toys but you won't find them in house-hold appliances. For them, universal motors are used. In universal motors, instead of stator being permanent magnets, electromagnets are used and therefore, can be powered by DC and as well as AC.
Just found this channel... Absolutely brilliant, been looking for this for ever! A combination of mechanical, electrical, civil.... Heaven! Thank you very much!
My Coord Sci teacher recommended this video to my 8th-grade class, and this video really helped me understand the material! Thanks a million, mate! Edit: We are learning about energy and how motors work. Great video!
I'm trying to get an assignment done right now and completely stumped - no clue what to do and i don't understand it, just watched this 5min video and understand all of it!
i have seen odd number of coils ,3 to be precise, i guess the function was to generate interrupted rotation to create a desired vibration. Experience from Electric toothbrush 1.5 volt DC motor :).
Amen to that, in my case i study aerospace engineery in Madrid and my school only teaches me to suffer and to sort out my problems by myself, they do not help you at all and make impossible tests and exams... (about things they should have explained in class and they did not)
Best video I've seen on this topic so far. What I liked the most is that the model evolves, as things are explained, into a real model of an electric motor
Very useful and thanks for uploading it. Couldn't understand it from my textbook. 1 doubt btw. According to Fleming's left hand rule, the North Pole will apply force towards the south Pole, and the current, the magnetic field, and the motion are perpendicular to each other. So, the North Pole should apply force on the coil which is connected to the split rings. The motion should be opposite I guess.
I think that the circuit diagram for the series connection was wrong..the wire from the right field winding should go to the left without touching the carbon brushes.
hi there teacher, can I know if there are permanent magnet dc motors with rotating magnets as rotor and stationary coils as stators in the market, I always see designs with rotating coils and stationary magnets but I dont see the opposite kind of dc motor I mentioned earlier above..why is that so?
They are called brushless dc motors, or BLDC motors they are used in your PC cooling fans as well as in quadcopters and radio controlled airplanes etc.
Muhammad... Did you really understood the video? Or did your brain just ignored the countless technical terms he kept using and just looked at the images and pretended you understood?
wjatevrr whatever! but are those countless technical terms really so difficult?? Lol I don't think so.. I guess your brain is weaker than you think. You really have a puny mind.
Faisal Muhammad Do you even think before imprinting your thoughts on the comment section There are people who dont have the basic concept clear , or are just beginning their study Anyways, they should appreciate the effort put in the making of the video
I like this video so much. It is just an introduction, but part of me feels that it would be better if some different types of excitation of dc motor are introduced just by a flip or two.
Awesome I love all of your videos. Now can you please make a video on how does a car engine cooling system system and how a car fuel injection system works. i would be very grateful if you kindly make these two videos.
Dude, Duder or El Duderino, ( if you aren't into the whole brevity thing,) you have filled in so many gaps in my understanding. I just subscribed and I look forward to learning more from you!
of course if you can produce Magnetic fields using electromagnets , you can produce energy power with Magnetic fields by induction a.k.a transformers and wireless chargers i.e.
Hi! Great video, just like all your other ones! I have a question about the armature of the rotor. You say that it has HIGH permeability to ease the magnetic flux interaction. Shouldn´t it be with LOW permeability so it will reduce the eddy current losses when the rotor turns inside the magnetic field of the poles? Hope i was clear with the question. Thanks.
High permeability is required to properly interact with magnetic field of stator. And as for eddy current losses, the armature metal is laminated to reduce eddy losses. ( I know it's late but ok)
It pisses me off that I "had" this type of classes in school but very briefly and didn't learn shit about it. Sometimes, when I finish school, I want to be a teacher, not because I would like it (I hate teaching), but because I want to give an exciting and full class to show people that "boring" stuff can be cool and very useful.
I learned how motor works or the function of each part of the motor. My knowledge about motor has expanded and helped facilitate my understanding of it.
Internet sources like this are the reason why in our era and the forthcoming times people can have better average education and understanding of the World. This is exploitating the possibilities technology can provide us with, possibilities that did not exist in the past. Congratulations to all people putting in effort to create the content of this channel!
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Does this video available in Hindi language?
This was better than my entire circuits class!
Mann.. its 5:50 am. I just dropped mine. Lol!
blacktopbrutha88 HAHA!
ok
TheBlackSheep exactly m8
Same case here!
0:19 Simplest DC motor
0:24 Stator, armature, commutator rings
0:42 Lorentz Law
1:20 Torque action nearing zero
2:18 Enhancing magnetic flux interaction
2:30 Spring-loaded commutator brushes
2:53 Parallel (shunt) and series motors
3:13 Series-wound motor (output of stator windings powers brushes in series connection)
3:23 Shunt motor (same power source energizes brushes and rotors in parallel connection)
3:35 Back EMF
3:47 Electromagnetic induction
4:06 Back EMF (proportional to rotor speed) opposes internal voltage
4:24 Large DC motors
Great video mate, you speak very clearly so the entire world can understand.
Very educative !
+xgenesys I agree with you. Greetings from Perú! Excellent video!
+Carla Marieta Huamán Cusichaqui Thanks :)
+xgenesys There are also subtitles. Great channel and great video. In 3rd class Electrical Machinery II course our professor let us watch this video to introduce us to DC motors.
you are right
atish rambhau maske
1 hour explanation in 5 min. Really good job
Must be nice
Thank you. Needed to read up on DC motors and it's a lot harder to understand the construction of these when it's all on paper. The step by step visual presentation made this a lot easier to digest.
Better than my lecture in my power engineering course. Thank you!
Thank you. I'm a mechanical engineering student, I'm taking electric machinery course this semester and you made it a lot easier for me to understand the construction and starting of dc motors. Although it's a too briefed description.
Me too. Cheer up.
Easy to understand and yet detailed enough visuals, a clear voice and the video length is perfect. Excellent video, thanks!
So nice
Absolutely great video, thanks a lot.
A small note for everyone: Something missed in the video, the armature coils don't exert only back EMF, they exert magnetic field opposite to beneficial flux also. Because of this, at the big powered machines; some extra coils which called "commutation coils" and "compensation coils" being used to get rid of the armature flux.
thank you , that is interesting because a magneto would use a capacitor to smooth out the fluctuation of flow between primary and secondary coils
私は日本人のため日本語でコメントを書きますが、私がまだ学生だった1980年代に見た図鑑等の挿絵で見るよりもずっとわかりやすい動画と思いました。
動画の該当する部分で、SERIES MOTOR＝直巻きモーター、SHUNT MOTOR＝分巻きモーターと日本語では訳されているのですが、直巻きモーター及び分巻きモーターの動作及びトルク特性等は私が過去に見た図鑑では紹介されていなかった記事であり、そのような特性等までも音声をなしにして動画を見ているだけでも分かりやすく表現されている点はとても良いです。
now all those static images from books and slides make sense
LOL, spittin' facts
one million likes for the animation, another one million for the explanations... i'll subscribe now! Thank you!!!!!!!!!!!!
Best video i have ever seen on you tube about DC motor..
Thanks sir
Basically, The current-carrying conductor produces its own magnetic field which interacts with the external magnetic field of the permanent magnet. This interaction is what moves the wire. If we make the conductor into a squarish U-shaped loop and fit a power source. Then one arm of the conductor will have the current coming towards the power source and the other one going out in the presence of the external magnetic field provided by the permanent magnets. Therefore, one half of the conductor will move upwards and the other half will move downwards and we would assume that the conductor will carry on rotating like this and we would be on our way of having DC motor. Two major problem occurs with this design. One is that the wires will tangle up and another one is that once the coil reaches the vertical position after rotating far enough, it would flip over, so the electric current would be flowing in the opposite direction. Now the forces on each side of the coil would reverse. Instead of rotating continuously in the same direction, it would move back in the direction it had just come. We need to periodically reverse the direction of the current to overcome this problem. So a commutator is used to overcome this problem. In the simplest form, the commutator is a metal ring divided into two separate halves and its job is to reverse the current direction every time the coil makes half a turn. Now since the torque becomes very small when the coil is perpendicular to the magnetic flux, the motion will be very irregular. To overcome this problem, one more loop of coil is added with a separate commutator ring (when the first loop is in the vertical position, the second loop is connected to the power source and therefore a motive force will always be present). To make the rotor motion even smoother, more loops and corresponding commutator rings are added. Next, the magnetic flux interaction is enhanced by fitting the armature loops inside the slots of highly permeable steel layers. And spring loaded commutator brushes help to make contact with the power source. In a practical motor, the permanent magnets are curved in a circular shape so it almost touches the coil of wire that rotates inside it. The closer together the magnet and the coil, the greater the force the motor can produce. DC motors are used for small applications like toys but you won't find them in house-hold appliances. For them, universal motors are used. In universal motors, instead of stator being permanent magnets, electromagnets are used and therefore, can be powered by DC and as well as AC.
the bro appreciate it. I've been struggling with this for months
I watched so many videos on how a dc motor works and didn't understand it but now I do, thanks to you.
Brilliant video, clear, simple, covers all the basics for further learning, great work!
Just found this channel... Absolutely brilliant, been looking for this for ever! A combination of mechanical, electrical, civil.... Heaven! Thank you very much!
ruclips.net/video/yfeDqNNP7Ek/видео.html
this explanation was amazing...thnx a ton..simple..accurate...time saving
I send your video to my professor as a learning material , so clear and easy to under stand!
absolutely brilliant. Better than any text book could explain!
I seriously don't have words to describe how good your videos are....
thank you very much...
My Coord Sci teacher recommended this video to my 8th-grade class, and this video really helped me understand the material! Thanks a million, mate! Edit: We are learning about energy and how motors work. Great video!
It is very useful lecture to understand electrical motor
Can I donate to you so that you produce more awesome videos?
I love your channel!
Давид Аветисян Thank you for your support ! We will make a session for donation very soon, so that, if you want to support us, you can do so.
Learn Engineering it is very important for engineering student
I'm trying to get an assignment done right now and completely stumped - no clue what to do and i don't understand it, just watched this 5min video and understand all of it!
Yes, we have an option for accepting donation now. Please check out our Patreon page.
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am a student ....these videos are simply awesome....I promise to make a donation as soon as I get employed next year....
The most perfect explanation in the world thanks from Lebanon
Very good explanation, thanks. I finally understand the workings of a DC motor.
Super one stop explaination!
No need to go any where be here and learn everything.
Thank you so much Team,Really you’re doing a great job🙏🏻🙏🏻🙏🏻🙏🏻
Best electronic channel ever. Also you are very gracious sir.
To ensure steady uninterrupted rotation there must always be an even number of coil loops that form the DC motor's armature.
i have seen odd number of coils ,3 to be precise, i guess the function was to generate interrupted rotation to create a desired vibration. Experience from Electric toothbrush 1.5 volt DC motor :).
Why
Great video. Easy way to learn about DC motors.
The narrator is very clear.
Thanks for the accurate translation.
정확한 번역 감사합니다.
I found this video incredibly clear and easy to understand; I am wondering how lots of people clicked on dislike !
Why didn't our teachers in university teach us this? I have to come online and find this myself...
+MinuteScience Don't complain, persons who know the most about any existing knowledge field are autodidact
falsonaga we are allowed to complain
Amen to that, in my case i study aerospace engineery in Madrid and my school only teaches me to suffer and to sort out my problems by myself, they do not help you at all and make impossible tests and exams... (about things they should have explained in class and they did not)
Uh if they don't teach you about electromagnetic induction and the Lenz law in your university then that's not a university you want to go to.
@@yaz2928 Hahaha, i learnt all this stuff in High School.
This is the best video for class 10 CBSE because there is a topic in 10 class.. Thank you so much...
Yeah...
Thanks to this video I can get an A in physics, thank you Learn Engineering
i am studyng electronic engeneering , this has been wonderful thanks
Thanks. I was wondering how electricity translated into movement! Now I know how it works
You guys are really saving the lives of students💯💯💯
"we will logically understand how this motor works"...how else???
ethologically or pathologically
you got me :D
Dcmotarrs
Best video I've seen on this topic so far. What I liked the most is that the model evolves, as things are explained, into a real model of an electric motor
Very useful and thanks for uploading it. Couldn't understand it from my textbook.
1 doubt btw.
According to Fleming's left hand rule, the North Pole will apply force towards the south Pole, and the current, the magnetic field, and the motion are perpendicular to each other.
So, the North Pole should apply force on the coil which is connected to the split rings.
The motion should be opposite I guess.
I am a 10th grade student. I understood this topic very clearly. Thank you so much friend. 🙂FROM INDIA..
Magnetic Effects Of Electric Current is messed up
Explained so absolutely. Thank you.
This is definitely better than my school classes!
That was awesome....very clear explanation..thank you so much
Thanks to my teacher who recommended me this video, and thanks to the person who made this video
Such a good video \o/ it would be really good if you add lap and wave winding and show them since their working is very confusing
it is very nice foe automobile.thank you for explain it how it work
thank you for this helpful video tutorial
Most helpful and easy to understand video i've ever come across!
How do you do it? Your videos are really easy to understand.
Most useful channel in youtube "Learn Engineering"
I think that the circuit diagram for the series connection was wrong..the wire from the right field winding should go to the left without touching the carbon brushes.
Priyanku Goswami yes man...I felt the same while analyzing the circuit and comparing it with the diagram
this was really good,cleared all the doubts
hi there teacher, can I know if there are permanent magnet dc motors with rotating magnets as rotor and stationary coils as stators in the market, I always see designs with rotating coils and stationary magnets but I dont see the opposite kind of dc motor I mentioned earlier above..why is that so?
They are called brushless dc motors, or BLDC motors they are used in your PC cooling fans as well as in quadcopters and radio controlled airplanes etc.
Thank you very much. You are real guru in the electrical machinary. Your awesome video helped me understand & remember these knowledge easily
Can beat all other videos.
Thank you for the video! Now I start to understand how those motors work.
Awesome video
This topic makes so much sense now. You are blessed
Hello! Is a generator working just opposite way? Can you make a video about it? Thanks
steer away Definitely, we will release video on DC generators soon .
I have a test on AC and DC motors in a week. This helped big time. Thanks!
Brilliant work, With the best of knowledge..
BUT..... Who disliked these videos?? Aren't they humans?.... Probably they are donkeys or other animals.
Or they are normal people to found the video not informative enough or didn't explain it enough for them to understand it.
Muhammad... Did you really understood the video? Or did your brain just ignored the countless technical terms he kept using and just looked at the images and pretended you understood?
wjatevrr whatever! but are those countless technical terms really so difficult?? Lol I don't think so.. I guess your brain is weaker than you think. You really have a puny mind.
Faisal Muhammad Do you even think before imprinting your thoughts on the comment section
There are people who dont have the basic concept clear , or are just beginning their study
Anyways, they should appreciate the effort put in the making of the video
I like this video so much. It is just an introduction, but part of me feels that it would be better if some different types of excitation of dc motor are introduced just by a flip or two.
Awesome I love all of your videos. Now can you please make a video on how does a car engine cooling system system and how a car fuel injection system works. i would be very grateful if you kindly make these two videos.
THANKXX IT IS EASYYYYY TO UNDERSTAND
Dude, Duder or El Duderino, ( if you aren't into the whole brevity thing,) you have filled in so many gaps in my understanding. I just subscribed and I look forward to learning more from you!
awesome video to see to know that things or make that things thanks for us
plz friend visit my channel
ruclips.net/channel/UCiXSTGf0HlRQkw6GEy9VnJA
I have a test tomorrow and this really helped me understand why the commutator rotates. Thanks!
0:28 Engineers were never great at spelling LOL. Learned a lot though, thanks!
the spelling is correct: Permanent. Dumbass
This was one of the best videos I've seen on the basics of it. Thanks
FYI this is how a DCgenerator works ^^ 3:47
of course if you can produce Magnetic fields using electromagnets , you can produce energy power with Magnetic fields by induction a.k.a transformers and wireless chargers i.e.
Micky mouse and Donald Duck
thank you i wasn't able to visualize it but this video helped me a lot
good work ... keep doing
Good lecture for everyone who wants to learn dc motor easily
Hi! Great video, just like all your other ones!
I have a question about the armature of the rotor. You say that it has HIGH permeability to ease the magnetic flux interaction. Shouldn´t it be with LOW permeability so it will reduce the eddy current losses when the rotor turns inside the magnetic field of the poles?
Hope i was clear with the question.
Thanks.
High permeability is required to properly interact with magnetic field of stator. And as for eddy current losses, the armature metal is laminated to reduce eddy losses.
( I know it's late but ok)
In Indonesian language,, and Indonesian channel we wait this sir,,,
yup, great! thank you so much for this tutorial video.
SOOO short and sweet, youre a life saver 😆
quick question everyone! why are you watching this video? Are you watching it because you want to persrue a career in engineering?
Yes. I am studying engineering :)
Jose Marquez eh, just curious on how it works.
Jose Marquez need to know for project
First year ME.
for mechanical engineering students.. you guys study mechanical and electrical... which one of these two is more difficult? in your opinion?
you speak very clearly,awesome video
It pisses me off that I "had" this type of classes in school but very briefly and didn't learn shit about it. Sometimes, when I finish school, I want to be a teacher, not because I would like it (I hate teaching), but because I want to give an exciting and full class to show people that "boring" stuff can be cool and very useful.
I have been confused from a month and wondered how the hell it works, now i got it cleared, thanks friend!!!
Thank you too much
what a explanation yaar. thanks for great explanation which I understand clearly not like book which only reading purpose and pass exam.
great
very interesting. my teacher just had to show us this, not complaining though. its cool!
Chi è qui per il link del Villa mi metta un like (solo per quelli della 5BA)
Great video. The new doors of learning have opened by you. Thanks a lot.
plz friend visit my channel
ruclips.net/channel/UCiXSTGf0HlRQkw6GEy9VnJA
I learned how motor works or the function of each part of the motor. My knowledge about motor has expanded and helped facilitate my understanding of it.
You literally cleared my doubts in 2 mins. Thank you so much.
I hope that the rest videos are as good as this one. So easy to understand... :3
Best explanation about commutation I've ever seen.
My prof put this video link in our slides. Great explanation of the basics!
Internet sources like this are the reason why in our era and the forthcoming times people can have better average education and understanding of the World. This is exploitating the possibilities technology can provide us with, possibilities that did not exist in the past. Congratulations to all people putting in effort to create the content of this channel!
You saved my life. Your awesome!
Thanks for your video it helps my channel grow and push me make more, Good Job