Homopolar Generator Revisit.

[forest]

http://fuel-efficient-vehicles.org/energy-news/?page_id=955


Gray describes the operation of his EMA motor as "similar to recreating lightning". He says the engineering and scientific world has known this recreation is possible but hasn't known how to do it. "When lightning hits the ground, causing a 10-million volt buildup, where does the energy come from to make it from a static charge to a lethal charge? Nobody really knows."[/size]

[/size]
THEY KNOW, it's so simple you would not believe [/size]

[tinman]

https://wiki.brown.edu/confluence/display/PhysicsLabs/5K10.80+Homopolar+generator

/b] . Or, if one wishes to consider that there is a contribution to an emf from the radius of the moving disc, one can show that there would be an opposing contribution from the section of the galvanometer branch that runs parallel to this radius. This arrangement permits rotation through only 300º, but it is sufficient to demonstrate this case. If the galvanometer branch could be moved while the disc is kept stationary, a motional emf would be developed whether or not the disc rotates. The analysis would be the same as in the first two cases.

(read all the cases in the link)

Rotating disc with galvanometer leads connected directly to the disc[/b]
If the galvanometer branch of the circuit could be arranged to move with the conducting disk, no emf would be developed. In this case, with a uniform B, one could show that there would be no change in flux through the circuit consisting of a radius of the disc and the galvanometer branch

Dose this mean that they have done it,or if they could do it,that there answer is a theoretical one ?.

Or, if one wishes to consider that there is a contribution to an emf from the radius of the moving disc, one can show that there would be an opposing contribution from the section of the galvanometer branch that runs parallel to this radius.

So here they are saying that the galvanometers branch(wires) would produce the same voltage as the disc,as it is also in the same magnetic field as the disc. So even if there is 100's of amps there,there would be no flow of current due to no potential difference of voltage.
This is very easy to overcome,and i now remember as to why i used 4 magnet's in my setup-which i hope to find tomorrow,providing i still have it.

To simulate this situation, two holes are provided on a radius of the disc for banana jacks and leads. If these leads are then twisted and connected to a galvanometer so that the area exposed to the field is constant as the disc rotates with the leads, no change in flux threads the circuit and the galvanometer reads zero.

This part makes no sense,as there is no change in flux threading the circuit even if the circuit is fixed,as the magnetic field is uniform.

Some say that the magnetic field around the brushes is what creates the back torque. But has anyone actually seen or measured a force on the brushes?. We can also look at the liquid brush version--why dose not the liquid fly out of the liquid rings when a load is draw?.



Brad

[poynt99]

I am probably wrong, and I'm glad Vortex chimed in with his direct experience.

In my humble opinion however, there is a frame of reference, that being the magnetic field; it is not moving or changing, regardless if it spins with the disc, or is stationary.

[tinman]

In my humble opinion however, there is a frame of reference, that being the magnetic field; it is not moving or changing, regardless if it spins with the disc, or is stationary.

I also agree with this,and this means that the external circuit is also included in this frame of reference,but an internal circuit(one that rotates with the disc)must also be in this frame of reference-right along with the disc it self-as it dose not matter whether the magnets rotate with the disc or they are stationary. If a magnetic field is stationary and dose not increase or decrease in time,then everything within that field is in the same point of reference,regardless of whether it has motion or not-->as long as it remains in that uniform magnetic field.

I have read the papers Vortex and TK posted,and a lot more as well. Although there is theories given as to what !should! happen if we rotate the circuit with the disc,i did not see any actual test of such being performed,and results posted.

I believe Vortex said he placed a battery within/on the rotating disc,and it did not rotate as a motor. I dont think it will in any case,just as spinning the magnets while the disc is stationary will not generate a current flow. There is differential oddities with the HPG as we already know,and Vortex's test may indeed not work,while the opposite action may be true.

[ayeaye]

I'm not trying to say how it is but, in my opinion you certainly see it wrongly, when you see it as something consisting of two moving parts, the disc and the magnet. It consists of three moving parts, the magnet, the disc, and the electrons in the disc. Rotating a disc when the electrons move with it, is not quite the same as rotating a disc when some force is applied to electrons. This can make them to move in a different way, or with different speeds.