It is one of the outside gears. The inside gear has all the magnets with their fields parallel to the tangent. I thought about it and I don't see any reason off-hand why the reverse situation would not work as well. The inside magnets' orientations just need to be opposite that of the outside gears' magnets' orientations, one perpendicular to the tangent and one parallel to the tangent. Now that I have said that..........I may be able to reverse them so that the adjacent interactions would be nullified, in which case the center gear would have all the fields perpendicular to the tangent. Thanks for the question........it made me think of something I had never considered before. I wouldn't even need shielding between adjacent gears and the "bumpiness" of the motion would be much less dramatic!!! After all this time, this thing is still a work in progress for optimization.Another clarification, if you please...
Is the gear with all north poles pointing outward the center gear, or one of the six?
That poses a problem though.......... I chose the inside gear diameter based on the spacing between the magnets when I played around with them. The larger the spacing for a gear with all the magnets with fields parallel to the tangent, the more "free" they are to interact with the other gear's magnets. If the magnets are too close, their north and south attract to the other magnets on the same gear and not only tend to pull them all towards the center but the attraction causes a more "rigid" field that hinders it from fully interacting with another gear's magnets. I would need to adjust the gear diameters to a slightly larger size to prevent this from happening, or just get slightly less powerful magnets since I already have the gears made and the magnets are cheaper to replace.
This makes me want to reconsider building this until a complete design change overhaul. I can reverse the orientations, get N50 grade magnets that are much smaller instead of the N34 or N36 that I have, and have slightly smaller gears. I have also found, since the original design, that the ratio of magnetic force:system mass plays a great role in vibration. The larger the mass of the gears, when compared to a constant magnetic force for the magnets, the smaller the vibrations are due to the higher inertia per field interaction.