Working Magnetic Motor on you tube??

[PolyMatrix]

Does the FEMM take into account that the rotor magnets are not at the same height as the stator magnet as per reference to Al's comments re-posted into this thread? http://www.overunity.com/index.php/topic,3871.msg72507.html#msg72507

Would not a difference in height change the strength of repulsion and attraction?

One other thing that concerns me is the amount of up/down movement in the Rotor and/or the stator can do as there could be a slight push from gravity as one of wheels drops at a latching or null point. Though the speeds at which these are turning the gravity effect should be minimal.

[niente]

I'm sorry but the Excel file I posted (relative to my first simulation) wasn't correct: the total  torque seems to be 11467, not 222! (I typed a ";" instead of a ":" in the sum formula)  .... anyway it seems too much ....  Why???
In attachment the corrected file.

Does the FEMM take into account that the rotor magnets are not at the same height as the stator magnet as per reference to Al's comments re-posted into this thread?

No, the FEMM software works in 2D, but one can simulate the minor interaction by decreasing the magnets power.

[MeggerMan]

@niente,
Much better results now then, I never spotted that error either.

You need to change the problem to mm not inches, and the depth to about 10mm.
AFAIK at the moment you a simulating an 80" rotor with 10" stator ring magnets.
25N average torque is good, but thats a big rotor to spin and you will need a big finger to overcome the 100Kg twisting action on that stator.

regards
Rob

[RunningBare]

Does anyone else notice the stator magnet is wobbling in a circle thats opposite the direction of spin in the stroboscope video?
http://www.youtube.com/watch?v=RHBIXjkUrK8

[robbie47]

I'm sorry but the Excel file I posted (relative to my first simulation) wasn't correct: the total  torque seems to be 11467, not 222! (I typed a ";" instead of a ":" in the sum formula)  .... anyway it seems too much ....  Why???
In attachment the corrected file.

@ niente
First of all: nice simulations. These could help in understanding the effect we are looking for.
I'll try your initiated files to vary a few thinks myself. Thanks for your effort so far.

You called your outcome torque, but what it really is, is the integral of the torque over 1/8 of one rotor revolution.
To get the average torque over 1/8 th rotor revolution you have to divide again by 451, I think.
This leads to an average torque of around 26 then.

Note: If I am not mistaken, the simulated rotor consists of air.
So, we should be very cautious with the figures from these simulations.