Direct Current Electric Motor

DC electric motor. The magntic field is show in red, the magnetic force is shown in green.

See also my electric generator animation:
http://www.youtube.com/watch?v=wchiNm1CgC4

View undreds of physics videos at:
http://bestphysicsvideos.blogspot.com/

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Moteur électrique à courant continu. Le champ magnétique est illustré en rouge, la force magnétique est représenté par les flèches vertes.

Voyez également mon animation d'un générateur électrique:
http://www.youtube.com/watch?v=wchiNm1CgC4

Visionnez des centaines de vidéos de physique:
http://videosphysique.blogspot.com/

Category:

Education

Tags:

• dc
• electric
• motor
• electricity
• magnetism
• physics
• science
• technology
• teaching
• learning
• 3-D
• simulation
• animation

[trippleciz]

Nice simulation but this is NOT a DC motor. The fact that only a single loop is incorporated in the design makes it 'AC' in its very basic form. . .

[PelletierPhysics]

@trippleciz The motor is powered by DC current, this is why there is a commutator.

[MrSydneyB]

how can I copy this video to show for my pupils?

[PelletierPhysics]

@MrSydneyB It is available at web.ncf.ca/ch865/englishdescr/­DCElectricMotor.html

[Spardeth]

When the armature wire is in horizontal mode (0.02), the armature current is cut off. So how does it keep turning? Inertia?

[PelletierPhysics]

@Spardeth Yes, you are right, it is because of inertia.

[foiwater]

@TheLionRichard Yes you are correct. While motoring, the source acts a prime mover moving the coil. faradays induction law states that relative motion between a conductor and a magnetic field induces a voltage in said conductor. The thing is, the voltage is induced in the opposite direction of the applied voltage. It is called Counter EMF, and all motor's exhibit it. Thus, all motor's generate while motoring. Because they are being turned while they motor.

[willbirful]

very interesting video thanks

[TheLionRichard]

Question: When powering a DC motor, won't it create current the other way as well? (working as a DC generator). How does this work.

[jayejayeee]

very interesting video thanks

[The007yoman]

Screw My Physics Teacher...

Youtube Is Much More Better..!!!

[blueangel4a]

@1011basic what's a commutator? I'm trying to make something like this...

[igotfacts]

@Spardeth well yeah it picks up momentum as it turns..when the angle between the coil and the magnetic field is 0 degrees and 180 degrees it experiences a couple..causing it to turn by 90 degrees.then the angle between the coil and the magnetic field is 90 and it experiences no force but due to momentum it completes 180 degrees of rotation...and the process repeats itself again and again until the current is cut off.

[q7spiz]

@PelletierPhysics So, it is a motor that converts DC to AC.

[a2zhandi]

It appears the current is flowing backwards?

[magna59]

These sort of motors were often found in children toys & also in science kits. There was a Lady bird book, with this design,as a home make experiment, made out of dressmaking pins,a cork & winding made out of a few turns of copper,and the commutator made out of a couple of long strands of copper for the static component and the rotating puck up, pins finishing off the rotating coil. But you do find it will often stalls at the cross over point. 'Real' DC motors have more than one coil.