FDM - flux displacer motor by Igor Knitel (Perihelion Labs)

[lumen]

Ok, so here are the results I find.
No matter how it looks, the results indicate no torque is produced.
The primary reason is because placing the magnet inside the ring magnet to absorb the flux does not only absorb the flux but draws more flux from further away to replace the void of flux so nothing really changes.

This did of course lead to another concept that I show in the second picture. The shaded pole rotor!
With the rotor plugged with loops of copper, the exit field will be shaded and should have less attraction on exiting the steel stator.

On approach, the field moves between the copper loops and is unimpeded, but as the rotor turns the field must move through the rings and is delayed at exit and should be much weaker.

[lumen]

I made some changes to increase the effect on the original design to see if any torque can exist with this type of concept.

In fact when one half of the ring magnet is shaded with steel plates and another magnet to adsorb the field, the results do show some torque!

The rotor in this picture shows a torque of .08 foot pounds in the clockwise direction as expected.
I'm thinking if the slits in the plate were angled, the torque might increase.

[broli]

In Maxwell 3d I learned that accuracy depends a lot on element size. I use it mainly to visualize fields and leave the rest to my brain.

This concept is very similar to many lafonte like ideas I have been simulating the past year. In most if not all of the designs the air gap was very important, the smaller the better, however the simulation had to be more accurate because of this so I had to increase the element size in some areas. This proved to be quite a heavy burden when you don't have a mini super computer at your disposal.

This is why I told him it wouldn't work, especially if the airgap between rotor and stator is tiny. But don't take my word for it, experimentation is always key. And you don't need a laminated stator to prove the concept just use solid machined steel blocks and make sure you have a tight airgap, then slowly rotate the inner rotor and see if the outer rotor will follow.

Lumen also made an interesting remark about the generator side of this concept. Which is what I have been exploring for a while now.

[wizkycho]

do not now where you guys wen't wrong with input parameters !
let's simplify this:
If InputRotor is certain to reroute (not shield) magnetic field
and therefore make gradient field (from 0.03T to 0.8T) at output rotor
- output rotor indubidably produces force vectorized from lowest to highest field strenght (this is a must)

I allso use simmulations and calculations
how to best reroute magnetic field of ring magnet (see FEM analysis above) (I suppose there is your error in Your simmulation)
but there are allso real experiments made to observe rerouting of magnetic field and make it appear where it is needed.

@broli
some LaFonte designs are not working, some really do (interaction of Magnet - and so called Fanners
works very good in FE mode... many other more or less complex LaFonte designs works too)

wiz

[wizkycho]

I'll start building version 2 cause it is easier to build and experiment with
from some aspects - exp. distances, stator - input rotor,stator - output rotor
I've ordered a ring magnet

broly and lumen shall prepare necessery simmulations
this time with correct parrameters

wiz