A Treatise on the Magnetic Vector Potential and the Marinov Generator

[broli]

I lately came across this very well written thesis on the subject of the Magnetic Vector Potential. A mathematical construct to some but to others a very real field with very real implications see:


Aharonov–Bohm effect
https://en.wikipedia.org/wiki/Aharonov%E2%80%93Bohm_effect


Basically what this thesis does is take the material (aka total) time derivative of the Magnetic Vector Potential and instead of throw away the spatial dependent, it is used to come up with new force terms.


One consequence of this is that for instance the Stefan Marinov motor actually can generate energy by seemingly extracting magnetic potential energy from the PM itself. I confirmed this in some experiments however more proof is still needed. Enjoy.

[Thaelin]

So you are saying that this has no armature reaction generated?  I thought this true in all types of generators. That reaction also being 90 degrees diff.

[F6FLT]

For me, Marinov's motor is the one in the black image below.
I built a proof of concept in May of this year. See attached picture.
This is a simplified version without sliding contacts, however I should observe a torque tending to rotate the conductive ring when injecting current into the two wires that also support the ring.
I didn't see any effect.

[gyulasun]

Hi F6FLT,

Could you put your magnet + core assembly onto the middle of a freely rotatable platform which has very low friction? 
I say this because if there is any torque as supposed, then it may be so small / weak that it gets lost in your relatively rigid ring-supporting wires.  Maybe you could fasten the bottom middle part of your core with a plastic or wood piece into the inner diameter of a single ball bearing while you fix the outer diameter of the bearing into say a vice.
Unfortunately, the magnetic flux as close to the magnet assembly as is shown with your ring distance in your setup may be rather low due to the closed magnetic circuit, this is why I think the developing torque could be very weak (if there is any torque, that is).

When I suggest this,  I suppose that the setup would operate 'backwards'  i.e. the magnet + core assembly should turn or at least react a little the moment the ring current appears.  Maybe a pulsed input should also be tried to see any small initial reaction if the backward operation is possible at all.  Perhaps an AC input to the ring could also be considered if the magnet+core assembly is the rotor, I wonder.

Gyula

[broli]

So you are saying that this has no armature reaction generated?  I thought this true in all types of generators. That reaction also being 90 degrees diff.

That is correct. There is an armature reaction but this is due to the Lorentz force, which can be seen to be acting radially on the rotating cylinder and having no mechanical contribution in the rotational direction. This is in contrast to moving a coil to or from a magnet to induce voltage, the induced current and the lorentz force acting on this current would be in the motion of movement (trying to impede it).