DC Motor, How it works?

The working of a DC motor is well explained in this video with the help of animation. Construction details of DC Motor, Shunt & Series motor, concept of back EMF are also explained in this video.

[Lesics]

Be our dubbing partner and earn a regular income !

[theblacksheep]

This was better than my entire circuits class!

[xgenesys]

Great video mate, you speak very clearly so the entire world can understand.
Very educative !

[Anderson]

now all those static images from books and slides make sense

[TheRealMake-Make]

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

[Abhishek-hitx]

1 hour explanation in 5 min. Really good job

[hasancansarsen]

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.

[avivatar]

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.

[Mitchmyoutube]

Better than my lecture in my power engineering course. Thank you!

[youssefm.al-aasar]

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.

[Sullendust]

Easy to understand and yet detailed enough visuals, a clear voice and the video length is perfect. Excellent video, thanks!

[shahriarahmed]

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.

[okY]

one million likes for the animation, another one million for the explanations... i'll subscribe now! Thank

[SahilSingh]

Best video i have ever seen on you tube about DC motor..
Thanks sir

[TheAveDavid]

Can I donate to you so that you produce more awesome videos?

I love your channel!

[YanaTV]

動画の該当する部分で、SERIES MOTOR＝直巻きモーター、SHUNT

[carlyleroberts]

Brilliant video, clear, simple, covers all the basics for further learning, great work!

[mattsmallwood]

Just found this channel... Absolutely brilliant, been looking for this for ever! A combination of mechanical, electrical, civil.... Heaven! Thank you very much!

[jaijain]

this explanation was amazing...thnx a ton..simple..accurate...time saving

[nickel]

In the beginning of the video you mention stator, but no label or arrow pointing to it. In the future, as you introduce each component, show a label for it with an arrow to designate it, so no assumption has to be made as to which component it's referencing.