Lenzless rotation using radially (update: axially works too) magnetized PM.

[khabe]

Nice and old idea,
But when you try to go on and to make any real construction, even real drawings ... then you will find out only next and next big problems after anothers
Try to draw it with shaft inside of inner rotor whats connected with outer rotor and all needed bearings, frames, all what must to run or fixed, then ...
... try to add flux returning (ferrous) parts, if you like to get more serious results,
At that at least today it is impossible to magnetize Neo magnets likely, you have to use segments.
When you are placing the last segment (its very difficult    but OK, you can do it) - you will find out that your nice ring did come totaly very loose
Myself I experimented with such kind of magnets when tried to construct an linear motor/actuator
But you try,
Perhaps you have more luck than previously tryed guys
cheers,
khabe

[0c]

I'm having a hard time locating some of those radially magnetized rings. Anyone have a good source?

[broli]

Yeah that's the main issue right now. I get a lot of patents and papers about processes but find little actual products.

Forgot to add that the smaller the distance between the magnets the better. There's no way this field would be uniform in practice, but by also decreasing the flux area towards 0 one can have little to no lenz effect.

[Liberty]

Yeah that's the main issue right now. I get a lot of patents and papers about processes but find little actual products.

Forgot to add that the smaller the distance between the magnets the better. There's no way this field would be uniform in practice, but by also decreasing the flux area towards 0 one can have little to no lenz effect.

If used as a motor, there is no pole to pull to or push from for thrust.  As a generator, it has a constant or near constant field, and would generate little or no power.  However, if you spin coils in there, between the magnets, and spin the output of the coils and use a stationary brush to tap the coils power output, it might act as a type of faraday generator?

[broli]

After I went to bed for sleep I realized that a radial field wasn't needed at all. So here is the method to use with axial magnetized ring magnets. See below. Obviously the lower part has to be weakened a bit for maximum effect but this is easy peasy by putting it in a magnetic pot. See simulation.