Like Poles

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mrblobby posted this 3 weeks ago

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Wistiti posted this 3 weeks ago

Excellent educative video Chris! As usual really well done. Thank you!

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mrblobby posted this 3 weeks ago

That's not your video, mrblobby?  Looks true, but disk magnet poles are on the top and bottom face, not side to side. Is there deeper penetration with the second way?

Idea1man not mine, I'm always on the lookout for videos that I find might be of interest to others & encourage discussion, or show new concepts or ideas. And this one tickled my fancy.

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Wistiti posted this 3 weeks ago

In the first video what I see is a demonstration that when the magnet are S—rod—N there an output around 0,1vac. And when the magnet buck, here is S—rod—S there are 6 time more output (near 0,7vac)

It is a simple but interesting experiment for me...

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Marathonman posted this 3 weeks ago

I have have been aware of Diametrically magnetized magnets for many years,  i was being sarcastic as to the title of the thread and the magnets in the video which are N-S. that is all. but my previous thread still stands tall.

Wistiti;

 yes if it were NN.

 

Marathonman

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Idea1man posted this 3 weeks ago

Chris   ...  Your example is much more dramatic.

And thanks for that Lenz's Law definition version. That made it clear.

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Idea1man posted this 3 weeks ago

==Disk magnets can be diametrically==

I looked that up. Thanks, Zanzal, I didn't know that.

Looks like a diametric disk could cause alternating current in the Unipolar Dynamo.

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Chris posted this 3 weeks ago

I am glad to see discussion on this experiment!

Key concepts here, these are really important to understand! 

@MrBlobby - Thanks for sharing!

Years ago, on my quest to study and understand Lenz's law, I did a similar experiment:

 

Looking back, I am some what embarrassed, my terminology was poor, however, this was a very good initial effort, but there are the same problems, Leakage Flux and so on. Expanding:

 

To light the Load, to "Generate" an E.M.F, a Voltage to bring about a Current flow, Work, or Kinetic Energy, lights the Light.

   Chris

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Wistiti posted this 3 weeks ago

Hey MM! Does it no seem like the way you see Figuera work? Bucking primary,with a varing intensity on a secondary coil? I mean here the bucking primary are the 2 same pole magnet varing inside the coil...

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Marathonman posted this 3 weeks ago

Mr Inverse Square Law just bit him square in the back side along with Mr Flux Leakage. Doh !

Marathonman

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Zanzal posted this 3 weeks ago

That's not your video, mrblobby?  Looks true, but disk magnet poles are on the top and bottom face, not side to side. Is there deeper penetration with the second way?

Hey guys,

Disk magnets can be diametrically or axially magnetized. The magnets shown the video are diametrically magnetized (magnetized through the diameter). I've got some myself, though I bought the ones with holes in the center so they can be attached to a shaft and spun. Also I reproduced the experiment using axially magnetized and its like Chris said, a ton of leakage flux. As Chris showed, leakage flux is bad for transformers, but if you don't want a transformer, maybe its a good thing.

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Idea1man posted this 3 weeks ago

MM  .  He did change the markings to like poles in the second try. The problem is the vertical face, of the magnet, was not changed, so there was no pole change.

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Marathonman posted this 3 weeks ago

And here i thought like poles ment NN or SS. how silly of me.

Idea1man; the answer to your question is a big fat NO.

Marathonman

Zanzal posted this 3 weeks ago

I like the experiment. Thank you!

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Chris posted this 3 weeks ago

Hey guys,

It is very easy to over look the simplicity of such an experiment and the mechanics of it.

This experiment will have a number of Flux Lines that are leaking, the ferite rod will be saturated and the Magnets will have a large number of flux lines leaking out into space.

This is called Leakage Inductance.

The voltage on the terminals of the Coil is because of the leakage Inductance.

Remember, from Faraday's Law of Electromagnetic Induction, it is the Change in the Magnetic Field that induces a Voltage.

 

If the Magnetic Flux ΦB is Zero, then the E.M.F will also be Zero.

 

   Chris

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Idea1man posted this 3 weeks ago

That's not your video, mrblobby?  Looks true, but disk magnet poles are on the top and bottom face, not side to side. Is there deeper penetration with the second way?

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