Permanent magnet motor

[ayeaye]

Ok, i put my drawing of the magnetic bearings here, too, say it's wrong

There is one reason though why magnetic bearings may not be a solution. And this is because when the magnetic field of the rotor is not even, it is a kind of "bumpy". And magnetic bearings don't hold the rotor firmly in place. Thus the rotor would shake, and this is where the energy would be lost.

[SoManyWires]

Ok, i put my drawing of the magnetic bearings here, too, say it's wrong

There is one reason though why magnetic bearings may not be a solution. And this is because when the magnetic field of the rotor is not even, it is a kind of "bumpy". And magnetic bearings don't hold the rotor firmly in place. Thus the rotor would shake, and this is where the energy would be lost.

the floating objects dimensions might get past that, if they are covering more surface area than 3 or 4 of the tracks lower surface magnet fields.
also there is other side positioned magnets to act as side stabilizers that could also be fixed in place in a less permanent and more adjustable way, if that too is useful.

perhaps magnets ordered according to the diameter of a drill bit used on small plastic blocks of which to position the magnets, and on the blocks create slotted channels or larger diameter holes that a washer and hex or other fasteners can hold the magnet blocks into place though allowing for very gradient adjustability on the projects jig work area.

some types of welding jigs are good examples for being adjustable when thinking about how to design a testing platform.
even standard pegboard that was meant to mount on walls for hooks could be repurposed for the exact geometry they have for lining things up better if drilling by hand is less accurate and no cnc machine around.
if working with small magnets, you might even be able to modify lego blocks cheaply for all this because they can keep perfect alignment, are non conductive, and unless a 45 or other non linear angles are needed, are easy to relocate.

could also help reduce chipping magnets during possibly alot of position adjustments using this method until fixed proper locations are determined.

[guest1289]

Yesterday ,  in another thread,  I suggested a modification of  ayeaye 's  magnetic-bearing,  the  Diagram  below .  The  Large-Disk in the middle,  is a magnetic-disk,  for repulsion from the side  stators .

(  Obviously,  all the magnets which cause the actual  'Levitation', those magnets should be much longer than the very flattish/thinnish magnets I have drawn in the diagram,  they should be cylinder-magnets   )

(  Years ago I thought up almost the same design (  actually the one below )  as  ayeaye 's.   But I thought it was so obvious  that it would already have been tried.  So because I had never seen it on the internet or anywhere,  I assumed it was worthless,  so I just decided to forget about it .   )

(  You'll notice I don't actually have your experience in this field,  which is why I'm not sure if  ayeaye  has a reason for not putting a  magnetic-disc  in the middle   )

As far as I know,  ayeaye  is the first person to have published this idea .

(  I have noticed more than one prize offered for anyone who can disprove rules of physics,   if   ayeaye 's   idea gets around   'Earnshaw's Theorem'  ,   he should consider applying for the prizes   )

[ayeaye]

Well, i tried it. I too have no tools. But i happened to have two big cigarette lighters, and a pencil, not sharpened. So i fixed two disc magnets to the end of each cigarette lighter, with a mounting tape. And i put a piece of mounting tape below each cigarette lighter, to fix them to the table. To fix them to the table so that they face each other with the ends with magnets on them. Then i fixed disc magnets to both ends of the pencil, with a mounting tape. The magnets were all ceramic disc magnets 10 mm in diameter and 5 mm thick. Mounting tape fixed the magnets firmly, there was no problem with this. All this arrangement was quite good, and everything was well adjustable. The pencil was very long, too, so some rotor can be attached to the middle, with practically no magnetic interference with the bearing magnets.

Now what the results were. I put the pencil, that supposed to be the rotor, between the two cigarette lighters. It held very well side wise, between the bearing magnets, side wise it was completely stable on both sides, no problem with that. But along the direction of the axis it was not stable, and ended up falling down, to one end or the other. So there was no way to keep it in the air.

Now i don't have any clear idea how to solve that. It needs either ring magnets, or then somehow extending the axis beyond the magnets at the ends of the pencil. Mounting tape likely cannot do that alone, but together with some adhesive tape wrapped around, it might be possible. The forces are not great at all. But the magnets that hold the rotor in place lengthwise, cannot be near the two bearing magnets, that will remove the "groove" the magnets at the ends of the pencil sit in.

Maybe now someone else would continue that experiment, from the point where i ended? Why should i be the only one who does experiments on that great thing? As i don't have anything necessary for it, more than anyone else has.

[ayeaye]

I found a stable position! On the picture below, the end of the pencil stays in the air. The other end was though 40 mm on a cigarette pack. This couldn't hold the other end of the pencil in the air, but it slightly resisted the pencil's lengthwise movement. Finding the stable position was very difficult. The magnets at the ends of the two cigarette lighters were oriented so that they attracted each other, but repulsed the corresponding pole of the disc magnet at the end of the pencil.