Super simple way to see proof Pseudo Solid principle works using ring magnets

[dieter]

I just made some observations when playing with some magnets and stacks of MOT - I Core sheets: when the stacks at the bottom and top of the magnets  have a certain height, eg. more than 3mm thick, then the repelling effect of like poles between pseudosolid parts vanishes. But when I try the same with only the bottom stack, it works ok. This may be connected to saturation parameters, I yet have to verify that.


These parameters may however be critical.


BR


EDIT. just tested it with single laminate "I" sheets on top and bottom, works very well. A high saturation of the plates seem to be neccessary. Maybe a horizontal multilayer lamination also has a negative impact, as it may lead to unwanted flux loops.

[gammarayburst]

@Butch, let me know what you think is the flaw in step 4. I don't see it there.
To further explain my idea for an implementation:


I have experienced a problem with this layout before. The magnet at the top of the 'horse shoe' believe it or not was projecting it's magnetic field all the way around to the far end and causing repulsion and the rotor magnet was being repelled on approach rater than attracted. If you can solve this then that layout will work. Let me know what you find out.
Thanks, Butch

[gammarayburst]

See attached

[dieter]

Thanks Butch, tho this is surprising me, because the permeability of the horseshoe isn't endless.


I will see what I can do about it, thanks for the data.


BR

[gammarayburst]

Thanks Butch, tho this is surprising me, because the permeability of the horseshoe isn't endless.


I will see what I can do about it, thanks for the data.


BR

BR, I was surprised also! I use 1 inch square mild steel bars 8 inches long and 1 inch by 1 inch round NIB grade 42 magnets.