Homopolar Generator Revisit.

[MagnaProp]

Sorry about my previous image. I had the S spinning in the wrong direction but it's corrected in this image.

... if we put 5 tornadoes in a circle, all spinning the same way,...

I think they don't all spin the same way. S spins the opposite way that N spins. In your scenario I would say we have only 4 tornadoes with two spinning clockwise and two spinning counterclockwise ending up in no net rotation.

Lets say we have two fans. N is a fan that blows our tornado up and S is a fan, spinning the opposite direction, that sucks our tornado in. A house sucked into such a system would basically travel in a straight line if each fan is equal in strength and if the house is traveling very fast. So between opposite poles you get opposite spin which I think straightens out flux lines. With the straightened flux lines, you get ether flow along these flux lines similar to that of water out a garden hose. Spinning the tip of a garden hose doesn't cause the water coming out of it to spin as well.

Tinman says "there are no magnetic lines of force" so I'll defer to him.

[lumen]

Tinman,

I like the design because it defines the third state of the homopolar generator.
That is the state of simply rotating only the magnet, which we know will not generate any power, but it's the reason it does not generate power that is important.


The uniform field can slip around the face of the magnet and never cut the conductor by simply sliding around with the conductor.
To generate power in a uniform field the field must be forced across the conductor as can be done by another conductor cutting the field in the opposite direction at the same time.

You will need to add another set of drum and disks that is stationary or rotates in the opposite direction to force the field to cross one or the other and not simply slide around the magnets.

[lumen]

Ok, now that you made me think about this again, that design makes me think a homopolar generator can be built without any brushes!

Suppose like your drawing there is a copper tube with the inner set of magnets inside of it with copper caps on the ends like the disks shown, but there is also a copper rod down the center of the tube shorting any current produced.

Now there is another copper outer tube with end caps just outside the inner tube. This outer tube will be stationary with the output coming off near the center shaft and only the center cylinder rotates.

The center cylinder cuts the field and generates a back emf that causes the field to slide around the magnets, but the outer cylinder (when under load) would generate a back emf also trying to prevent the field from slipping.

So in the end you would have a brushless homopolar generator. The bad news is that it would have increased drag as the load increases like all generators.

[antijon]

@MagnaProp,
I understand what you mean. If North and South spin in different directions then they must do as you say.

I don't know about Tinman's experiments with magnetic spin, but I have seen a video of electrolysis being performed in the vicinity of a permanent magnet. In this case it must be considered that the electric current is causing the water's rotation. This can be proven by flipping the voltage polarity. I also remember a thread here by someone that was trying to promote his E-book about magnetic spin, but from I saw his tests showed no reason to believe it was inherent, nor useful.

I still don't understand the concept of a uniform magnetic field. It certainly makes the operation of a homopolar generator easier to understand, along with a rotating field, but is that the case? If a perfectly created magnet was used, that appeared to have a balanced magnetic field, then I can understand uniformity and magnetic rotation. But magnets are made perfectly. If a magnet was created imperfectly, which can be done, and was weaker on the left side of the pole face than on the right, it could still produce current in an HPG. So how can a magnet with a lop-sided field be uniform, or how does a non-uniform magnetic field rotate?

I'm sorry that I'm questioning something that many of you believe in, but considering that electron spin, and electron procession, are the cause of magnetic fields, I don't understand how a magnetic field can be uniform. Electrons can be quantified and positioned in space. The produced magnetic fields should inherently be quantified and positioned in space.

[minnie]

  I came across this. Unipolar generator demonstration of special relativity, RE Berg.
           John.