magnetic spinning disc video

[gyulasun]

Hi Bill and all,

I watched some of  tractormag's videos and I think the working principle must be the effect of a rotating magnetic field on a rotating permanent magnet,  rotation is syncronised to the frequency of the changing magnetic field.

A similar effect takes place in case of Nikola Tesla's rotating eggs demonstration back in 1893, at the Chicago World Exhibition.  But in case of the egg made of metal (probably copper) the rotating magnetic field induced eddy currents and these currents created magnetic fields and the interaction of the two fields caused the rotation of the egg;  in case of using a disk shape permanent magnet the rotating field can immediately interact with the poles of the disk magnet which results in rotation.  (I assume a certain amount of eddy current is also being created in the disk magnet, Neo type magnets do conduct electric currents like AlNiCo types but ceramic/ferrit magnets cannot.)

So what is behind the walls must be some multiturn coils excited by oscillating currents of differing phase and these changing magnetic fields created should influence the rotation of the disk magnet. 

Regards,
Gyula

[tractormag]

What does the word quote do on the web site? Anyone please

[Tink]

What does the word quote do on the web site? Anyone please

This

[tractormag]

I'm stupid Tink! Can you elaborate a little more?

[Tink]

I must be getting tired sorry about that.