The bearing motor

[ekimtoor1]

If in fact the motion happens because of distortion in the ball bearings due to resistance and heat, and there are many convincing explanations of this effect, then it should be possible to make ball bearings from that new non-joulian alloy that has the large magnetostrictive effect when exposed to a magnetic field. a bearing made from this alloy would distort similarly when exposed to a magnetic field?  Would probably need a strong one just the same as you need enough electricity with the plain bearing to drive it.

[allcanadian]

@tinman


I think the bearing motor seems pretty straight forward however the problem is abstract and a little misleading if we cannot see it for what it is.
It is the Lorentz Force, in the picture below we have a rail gun and if we simply replace the rails with the outer races of our bearings on each end and the projectile with our balls in the bearings we have a two rail rotary rail gun. Now one would think the currents moving in opposite directions at each end bearing would cancel. However fundamentally the moving balls which carry the current in the bearing are the moving projectile as below rolling along the outer race/rails and the inner race and connecting shaft are simply conductors connected to the shaft as below which rotate with the ball in the bearing.


Thus it is really no different than the picture below where the shaft across two parallel rails which carry current moves the shaft which is riding on the conductive rails. Now if in the picture below we simply placed the moving shaft on a conductive ball at each end of the shaft on the rail and the ball moved/rotated with the shaft then we have a linear ball bearing motor very much like our ball bearing motor where the ball/projectile just so happens to rotate around the outer race/rail of the bearing connected to the inner race/shaft. It seems very easy to understand and based on basic well known phenomena. It is just that the complexity of what we think we see has obscured the simplicity of it as is often the case.

AC

[tinman]

@tinman


I think the bearing motor seems pretty straight forward however the problem is abstract and a little misleading if we cannot see it for what it is.
It is the Lorentz Force, in the picture below we have a rail gun and if we simply replace the rails with the outer races of our bearings on each end and the projectile with our balls in the bearings we have a two rail rotary rail gun. Now one would think the currents moving in opposite directions at each end bearing would cancel. However fundamentally the moving balls which carry the current in the bearing are the moving projectile as below rolling along the outer race/rails and the inner race and connecting shaft are simply conductors connected to the shaft as below which rotate with the ball in the bearing.


Thus it is really no different than the picture below where the shaft across two parallel rails which carry current moves the shaft which is riding on the conductive rails. Now if in the picture below we simply placed the moving shaft on a conductive ball at each end of the shaft on the rail and the ball moved/rotated with the shaft then we have a linear ball bearing motor very much like our ball bearing motor where the ball/projectile just so happens to rotate around the outer race/rail of the bearing connected to the inner race/shaft. It seems very easy to understand and based on basic well known phenomena. It is just that the complexity of what we think we see has obscured the simplicity of it as is often the case.

AC

And the motor can run in either direction with either a DC or AC current how?

[MileHigh]

AC has it right, it works on the magnetic component of the Lorentz force.  So, it works just like just about any other motor, they are just making it difficult to visualize how and where the Lorentz force is acting.

However, you have some huge "clues" to arrive at the answer.  You know the force in question has to apply torque to the motor, so you know its direction.  So that limits the places in the motor where torque can actually be applied.  Then all that you have to find is other two orthogonal vectors, the current flow and the magnetic field.  Where does that "fit" in the motor?

Then, ideally you would make a simplified drawing or drawings that explain how the motor works.

I think that it's important to mention that even before you even start, you already know how it works.  That's a fundamental realization.

It's not surprising that when you change the polarity of the applied voltage the motor continues in the same direction.  Figure the motor out, and the reason for this will become self-evident.

Tinman said that it can rotate in either direction.  I did a quick check and I disagree, it looks like the motor will always turn in the same direction, for both a regular and a reversed battery connection.  I looked at the rail gun and noted that the rail gun will also shoot in the same direction when you change the polarity.

[Magluvin]

Tinman said that it can rotate in either direction.  I did a quick check and I disagree, it looks like the motor will always turn in the same direction, for both a regular and a reversed battery connection.  I looked at the rail gun and noted that the rail gun will also shoot in the same direction when you change the polarity.

Quick check?  Tin says it doesnt start till you give it a spin, in either direction of rotation and continues in that direction of rotation no matter the polarity of input. Are you saying he lying?

From what I understand, a rail gun is directional and doesnt require a push start.

Mags