Homopolar torqueless gear generator.

[broli]

To all whom it's concerned if you want a very condensed and well written document on the history of the physics behind such things as the homopolar mo./gen., rail guns and other similar tech read this thesis:

http://www.df.lth.se/~snorkelf/LongitudinalMSc.pdf

I also suggest to research some of Jorge Guala-Valverdea work.

The above will give you a very good base to truly understand the real physics and nature of the tech.

[Omnibus]

@broli,

Thanks a lot for the link. Brings back memories when we used to gather in Peter Graneau's office at the Northeastern U. in Boston for discussions. He had just invited Assis form Brazil as a visiting scientist. Those were wonderful times. Long gone.

I hope you're familiar with Konstantin Meyl's work on the same topic and the criticism of it by Bruhn. Would be curious to know your take on that.

[Liberty]

You think wrong.

As I say that a homopolar generator works according to conventional laws of physics, it is only you who imagine witchcraft.

A Faraday disk can be used as generator or motor.

In generator mode, the Lorentz force F=q*v.B makes the electrons flowing radially. We can rewrite the equation by using preferably the Faraday's law: (1) e=B*(dL.v) where dL is a radial segment, v the linear speed of electrons, both being vectors and their product is vectorial. Here v and dL are perpendicular.

In motor mode, the easiest way is to used the Laplace's law which here gives the tangential force acting on a current element dL: (2) dF=I*(dL.B). dL and B are also vectors and perpendicular.

Now if we loop the external circuit in order the generator disk to provide a current, from equation (1) we get the current I that is drawn: I=e/R, R being the resistance of the circuit.
We put this current I in equation (2) in order to get the counter force which generates the counter torque. And by simply integrating along the radius the product of the force dF by the distance from the disk's center, we get the counter torque.

What you missed is that as soon as a Faraday disk is used as generator and a current is drawn, then the current makes the Faraday disk to function as a motor whose torque opposes the  torque you apply to rotate the disk. Both phenomena work together.

The fact that you group 2 disks doesn't change anything in the fact that the two counter torques still apply to each disk. If you are unable to understand the theory, you should build your "invention", make a real device, and observe what will be going on (nothing new), instead of providing a pretty but useless cartoon.

"In generator mode, the Lorentz force F=q*v.B makes the electrons flowing radially."

Just a question/statement.  Could this step be viewed as:  The shortest (lowest resistance path) on the spinning disk/magnet is from the center of the disk to the outside.  This "path" creates a wire on the disk in essence that passes through the magnetic field, which collects a charge and also creates an electron path for power to flow when a load is applied.  It appears that the magnetic field has the effect of suspending the charge on the area of the disk, avoiding discharge through the disk, rather preferring the low resistance path of the "wire" to the load.

Liberty

[broli]

@broli,

Thanks a lot for the link. Brings back memories when we used to gather in Peter Graneau's office at the Northeastern U. in Boston for discussions. He had just invited Assis form Brazil as a visiting scientist. Those were wonderful times. Long gone.

I hope you're familiar with Konstantin Meyl's work on the same topic and the criticism of it by Bruhn. Would be curious to know your take on that.

Yes I'm a little familiar with Meyl. But his work is based more on time variant EM, while ampere's original formulation relates to time invariant EM. The force between current elements to be exact.

[broli]

"In generator mode, the Lorentz force F=q*v.B makes the electrons flowing radially."

Just a question/statement.  Could this step be viewed as:  The shortest (lowest resistance path) on the spinning disk/magnet is from the center of the disk to the outside.  This "path" creates a wire on the disk in essence that passes through the magnetic field, which collects a charge and also creates an electron path for power to flow when a load is applied.  It appears that the magnetic field has the effect of suspending the charge on the area of the disk, avoiding discharge through the disk, rather preferring the low resistance path of the "wire" to the load.

Liberty

You must first see why the voltage is created, the rest is just standard ohm's law.

The generator I posted above has some real caveats. But I would be surprised if anyone could point them out. As I made one assumption which could only be verriefed experimentally or using a finite current element simulation software. I tried to make the later but it got a bit too complex. So I guess I'll have to go with the former now.