Unipolar Induction - Relative motion isn't needed!

[gravityblock]

Transformer -  Stepped-up voltages:

A voltage induced during the acceleration and/or deceleration phases in a stationary disc by a rotating magnet is analogous to a secondary being induced due to a varying current (AC or pulsed DC) in the primary of a transformer.  There is no voltage induced in a secondary when there is a steady current in the primary which is also similar to no voltage being induced with a steady rotational velocity in this mode of operation.  If the unipolar generator in this mode of operation is the mechanical analog to an electrical transformer, then the voltages may be easily increased in the homopolar generators.

Gravock

[TechStuf]

Bismuth is a metal with a relatively low melting point. 520.6F degrees. 
The temperature of dry ice is about -109F degrees.  Get a NdFeB magnet of N50 grade and cool it to dry ice temperature.  Pour a bit of melted bismuth on the face of the cold Neo magnet.  As the bismuth is nearly instantly quenched on the face of the Neo, it's crystalline structure will change a bit.  Enough to conduct some interesting experiments.
TS

[broli]

Finally found some time to read the paper AND make a post. The results are quite interesting and in line with many "what if" thoughts I abandoned a a long time ago. These experiments can only be truly appreciated when you have dug deep into this subject and I don't know of any other subject that I got so deep into. The experiment is very noteworthy and important to say the least.

One thing that caught my eye was this line "(The yoke PP' never moved)". This is an interesting statement because another "what if" suddenly pops up. What if this moved as well, would a voltage still be produced? This part of the puzzle would mean you would have a FULLY rotating system with no static parts and still produce an EMF, in other words, an unequivocal case of a generator that produces 0 torque.
It honestly would be surprising if that happened and even equally surprising if it didn't.

The funny part is that the other experiment of accel/decel magnets can also be applied to the above if it was found that the yoke had to be stationary. A very fast servo could oscilate the circuit back and forward.

I think you also may see that the biggest advantage with these setups is voltage multiplication. You can easily use multiple loops even hundreds of turns, to multiply the voltage beyond the inherit limit of a classical homopolar generator.

[gravityblock]

Bismuth is a metal with a relatively low melting point. 520.6F degrees. 
The temperature of dry ice is about -109F degrees.  Get a NdFeB magnet of N50 grade and cool it to dry ice temperature.  Pour a bit of melted bismuth on the face of the cold Neo magnet.  As the bismuth is nearly instantly quenched on the face of the Neo, it's crystalline structure will change a bit.  Enough to conduct some interesting experiments.
TS

This would be a good experiment and it wouldn't be too difficult to perform.  From what I've read, bismuth is a superconductor (hyper-conductor) at room temperatures with small diameter wires around 10 - 100 nanometers.  I'm sure bismuth would be a hyper-conductor at -109⁰F with much larger diameter wires.  The crystalline structure changing due to being instantly quenched on the face of the Neo (magnetic field) would make this a very interesting experiment with a homopolar generator/motor.  I think this idea is definitely worth pursuing.

Gravock

[gravityblock]

Finally found some time to read the paper AND make a post. The results are quite interesting and in line with many "what if" thoughts I abandoned a a long time ago. These experiments can only be truly appreciated when you have dug deep into this subject and I don't know of any other subject that I got so deep into. The experiment is very noteworthy and important to say the least.
One thing that caught my eye was this line "(The yoke PP' never moved)". This is an interesting statement because another "what if" suddenly pops up. What if this moved as well, would a voltage still be produced? This part of the puzzle would mean you would have a FULLY rotating system with no static parts and still produce an EMF, in other words, an unequivocal case of a generator that produces 0 torque.
It honestly would be surprising if that happened and even equally surprising if it didn't.

The funny part is that the other experiment of accel/decel magnets can also be applied to the above if it was found that the yoke had to be stationary. A very fast servo could oscilate the circuit back and forward.

I think you also may see that the biggest advantage with these setups is voltage multiplication. You can easily use multiple loops even hundreds of turns, to multiply the voltage beyond the inherit limit of a classical homopolar generator.

Muller has another publication, titled "Experimental Test of the Normal and Retrograde Railgun Accelerators", where the aluminum rod advanced in the forward direction as expected (away from the battery bridge) whereas the steel (magnetizable) rod advanced backwardly when they're allowed to roll.  When the same system is setup vertically, however, and the transversal rod is suspended on a balance (without rolling), no retrograde behavior is observed for the steel rod. Both, aluminum and steel rods, moved in the forward (expected) direction. The conclusion is that rolling of the steel rod is essential to observe its retrograde motion.  Any thoughts on this?  I'm currently in the process of trying to locate this publication.  If I find it, then I'll post a link to it.

Thanks for joining this discussion,

Gravock