Gear-magnet motor. Just a strange idea

[broli]

That's quite a drastic change from your original concept. The geometry is the same but the field configuration is completely changed.

Edit: I added a 3d rendition of how I thought your original design was magnetized. Imo it's much more straightforward than your simulated design. The only problem is that you need a 3d simulator to simulate such setup. However the 2d simulation I posted earlier is a good approximation. It's also not difficult to switch the poles of those ferro materials.

[Low-Q]

Thanks alot for sharing this. It should probably be much easier to build. Only one thing I wonder about, is how much of the magnetic field will be left to be guided into the outer rotor and towards the eccentric rotor - like the example in the last picture? The magnetic field will use the shortest and easiest path to close the magnetic loop, so I am afraid almost none of it are willing to affect the eccentric rotor in any kind.
I had an idea of making the magnetic path for the outer rotor as difficult and long as possible, so most possible magnetic flux could affect the rotors.

I have som parts in my office I can use. A couple of cylindric big neos, and lots of iron powder discs I can cut into any shape I want. I want to stick to the example in the simulations, because I believe that works well to confirm wether it will or will not be a functional motor.

But don't hold your breath. I will definitely take a while - time flies when you have fun

[broli]

Vidar, I think the big "magic" here is the "free" flip of the poles. The 2d simulation I made can be much simpler by only one rotor and no gearing. At every pole reversal you put a stator magnet, this will serve as the attraction and repulsion mechanism. While the static pole reversal magnets causes the switch between these forces. At least vizimag simulation confirms these forces. I attached some images. The good thing about this is you don't need to cut ring magnets in two, you could just test the concept by using coils instead.

If you think this got offtopic please say so, but it is inspired by this thread.

[lumen]

@Broli

I think your animation demo is perfect! This should work if all moving parts are NOT magnets. The center could be a ring magnet covering 1/2 of the four rotating center steel pieces, and the outer could be a split ring magnet covering only the outer 1/2, of the five outer steel pieces. Like the gray area you indicate, would be air and the ring magnet would start outside of that.
It's perfect because in this setup, the sticky areas are exactly balanced from the opposing side leaving only a repelling condition on the right and attraction on the left, exactly as you have shown!

It still needs gearing though, because both inner and outer steel pieces must move. The inner steel pieces do not change field while rotating, so something could be done like possibly a magnet, but you would need to be careful not to let the field become too strong and overpower the switching action of the outer pieces. Especially at the bottom where the switching takes place in close proximity.

[broli]

but you would need to be careful not to let the field become too strong and overpower the switching action of the outer pieces. Especially at the bottom where the switching takes place in close proximity.

I have tried different radi and it always worked. So the magnet can be as far from the switching ferromagnet as you like to rule out any negative influence due to the field of the magnet. Yet another way to do this is by using a weaker stator magnet than the magnets magnetizing the ferromagnet.

Concerning the gears. It's just mathematical logic. We know due to newtons 3rd law both have the same torques but in opposite direction, however due to the gearing the one with highest ratio ie rotational speed will "win" and drive the system. But if you take any motor concept DC, induction, homopolar... And apply this concept to it of using the reaction torque. You'll always find you didn't negate back emf but just played around with torque to have one system dragging the other.

However in low-q's design the fundamental concept is the switching of poles. I don't like to use this term, but in essence the "sticky" point is instantly and passively switched to give a repulsion. This I think is the real magic and boils down to the simple design I posted last.