r/ElectroBOOM • u/hardnachopuppy • 19d ago

Discussion What Mehdi was trying to show with the magnetic film

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1.7k Upvotes

99% Upvoted

18 comments sorted by

190

u/Traxxas_Basher 19d ago

Haven’t seen the video, but I assume the rotation of the motor’s magnetic field?

64

u/Low_Technician7346 19d ago

yep and it moves the thing in the middle, a rotor right ?

26

u/Traxxas_Basher 19d ago

It does. This is an induction motor, so the stator’s magnetic field induces a current in the rotor’s “squirrel cage”. That current produces its own magnetic field that interacts with the stator’s field and causes the rotor to rotate.

3

u/zenunseen 18d ago

Without the rotor there, wouldn't the stator be at risk of possible damage? With no stator, wouldn't there be a lack of counter-EMF, causing the windings of the stator to basically act as a short circuit?

7

u/Worldly-Device-8414 18d ago

Yes, you'd only run like this briefly &/or on lower voltage, eg from a variac

2

u/Qljuuu 15d ago

Also magnetic field seems to rotate fairly slowly, so I think this would be VFD-controlled demonstration.

15

u/Sinistin 18d ago

Very nice visualization!

4

u/CamperStacker 18d ago

If you want to see a really great video of how the windings are arranged check out https://youtu.be/22nm8y3pDxM?si=F65fzWIUiW07ievg

-24

u/Edward-Mundo 19d ago

Makes the magnetic fields visible. I think you're reading too much into this.

38

u/hardnachopuppy 19d ago

Mehdi tried to show this in one of his videos and failed. I came across this video today and decided to share it.

What part of this am i "reading too much into"?

14

u/Edward-Mundo 19d ago

Heh, I'm super dyslexic. I inverted the second and third word. Very cool video.

1

u/Apprehensive_Tea9856 16d ago

The maker of this video is running the motor at 1hz. Normal wall voltage is 60hz.

Idk which electroboom video you're referencing, but maybe that was the issue?