PopularFX
Home Help Search Login Register
Welcome,Guest. Please login or register.
2019-03-24, 05:01:10
News: Forum TIP:
The SHOUT BOX deletes messages after 3 hours. It is NOT meant to have lengthy conversations in. Use the Chat feature instead.

Pages: 1 2 3 4 [5]
Author Topic: Electromagnetic Archimed's screw  (Read 2217 times)
Hero Member
*****

Posts: 1069
Hi F6FLT,
No but elsewhere on this forum I suggested the TPU did this with the bunches driven round the loop at great speed acting like magnetic poles moving at great speed.  Then I offered the suggestion that movement through the Earth's scalar magnetic potential could conjure up forces.
Smudge
   
Full Member
***

Posts: 235
Hi F6FLT,
No but elsewhere on this forum I suggested the TPU did this with the bunches driven round the loop at great speed acting like magnetic poles moving at great speed.  Then I offered the suggestion that movement through the Earth's scalar magnetic potential could conjure up forces.
Smudge

I share this view about a force through the Earth's scalar magnetic potential (but weak, measurable?).

I found a new type of homopolar generator, very simple and very different from the Faraday disc on two main points, giving about half the voltage with the same magnet, and whose best explanation could be the electron spin in a magnetic gradient. Surprisingly, I found nothing about this kind of device, as if it was unknown. I need searching and testing more before I present it here.
The "electronic spin in a magnetic gradient" is therefore a hot topic for me, all informations are welcome. Thanks for your answer.


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Group: Elite
Hero Member
******

Posts: 3427
It's turtles all the way down
I share this view about a force through the Earth's scalar magnetic potential (but weak, measurable?).

I found a new type of homopolar generator, very simple and very different from the Faraday disc on two main points, giving about half the voltage with the same magnet, and whose best explanation could be the electron spin in a magnetic gradient. Surprisingly, I found nothing about this kind of device, as if it was unknown. I need searching and testing more before I present it here.
The "electronic spin in a magnetic gradient" is therefore a hot topic for me, all informations are welcome. Thanks for your answer.

Here is one that is interested in what you have found :)


---------------------------
"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy
   
Full Member
***

Posts: 235
Here is one that is interested in what you have found :)

Thanks for your interest, Ion. I will prepare the subject.


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Hero Member
*****

Posts: 1069
The "electronic spin in a magnetic gradient" is therefore a hot topic for me, all informations are welcome.
As I see it if you have a rod of a ferromagnetic conductor (such as Fe) that has a longitudinal B field with a gadient, the conduction electrons will all be either spin up or spin down (i.e. none will be spin sideways).  With the dipole moment of each electron being uB (the Bohr magneton) each will endure a force Fx=uB.dBx/dx.  If there are more spin ups than spin downs then there will be a migration or a current flow.  If the rod is saturated so that there are no spin downs but still has an applied field gradient the force will be equivalent to an electric field of magnitude (uB/e).dBx/dx.  An increase in field of 1 Tesla above the saturation level from one end of the rod to the other will be equivalent to an applied voltage of 58 microvolts across the rod.  Of course whether that results in a current flow depends on whether there is an external circuit connected, otherwise it just means that the rod gets more electrons gathered at one end than at the other.  I have already suggested that an Fe etched to form an array of triangular shapes acting as flux concentrators can be connected in series to make a magnetic battery.
Smudge
   
Group: Elite
Hero Member
******

Posts: 3427
It's turtles all the way down
As I see it if you have a rod of a ferromagnetic conductor (such as Fe) that has a longitudinal B field with a gadient, the conduction electrons will all be either spin up or spin down (i.e. none will be spin sideways).  With the dipole moment of each electron being uB (the Bohr magneton) each will endure a force Fx=uB.dBx/dx.  If there are more spin ups than spin downs then there will be a migration or a current flow.  If the rod is saturated so that there are no spin downs but still has an applied field gradient the force will be equivalent to an electric field of magnitude (uB/e).dBx/dx.  An increase in field of 1 Tesla above the saturation level from one end of the rod to the other will be equivalent to an applied voltage of 58 microvolts across the rod.  Of course whether that results in a current flow depends on whether there is an external circuit connected, otherwise it just means that the rod gets more electrons gathered at one end than at the other.  I have already suggested that an Fe etched to form an array of triangular shapes acting as flux concentrators can be connected in series to make a magnetic battery.
Smudge

What you write is interesting to me as the SM large 17inch TPU v1 (1996 ver)  uses heavy gauge iron wire around it's outside diameter. This is possibly wound over the top of vertical toroidal winds, such that it only contacts the outer portion of the vertical winds. Lets consider what effect this might have.

Regarding your magnetic battery idea, I did test this using mumetal foil pieces but could not detect an emf even with a very sensitive Kiethley uVolt meter. Maybe we need to modify the experiment.


---------------------------
"Secrecy, secret societies and secret groups have always been repugnant to a free and open society"......John F Kennedy
   
Full Member
***

Posts: 235
As I see it if you have a rod of a ferromagnetic conductor (such as Fe) that has a longitudinal B field with a gadient, the conduction electrons will all be either spin up or spin down (i.e. none will be spin sideways).  With the dipole moment of each electron being uB (the Bohr magneton) each will endure a force Fx=uB.dBx/dx.  If there are more spin ups than spin downs then there will be a migration or a current flow.  If the rod is saturated so that there are no spin downs but still has an applied field gradient the force will be equivalent to an electric field of magnitude (uB/e).dBx/dx.  An increase in field of 1 Tesla above the saturation level from one end of the rod to the other will be equivalent to an applied voltage of 58 microvolts across the rod.  Of course whether that results in a current flow depends on whether there is an external circuit connected, otherwise it just means that the rod gets more electrons gathered at one end than at the other.  I have already suggested that an Fe etched to form an array of triangular shapes acting as flux concentrators can be connected in series to make a magnetic battery.
Smudge

It's interesting but I realize that this can't be the explanation of my homopolar generator which outputs hundreds of mV instead of tens of µV.
I simply forgot that both spin produce opposing effects. Or could it be that in ferromagnetic metals under a magnetic field, the difference between spin-up and spin-down electrons would be augmented?







---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Hero Member
*****

Posts: 1069
It's interesting but I realize that this can't be the explanation of my homopolar generator which outputs hundreds of mV instead of tens of µV.
That 10's of µV applies to plain electron dragging by a non uniform field, it does not apply to the cylindrical homopolar generator which uses v X B.
Quote
I simply forgot that both spin produce opposing effects. Or could it be that in ferromagnetic metals under a magnetic field, the difference between spin-up and spin-down electrons would be augmented?
Exactly what happens and that augmentation is called spin polarization.  I'll dig out the formula relating magnetization to spin polarization.
Smudge
   
Full Member
***

Posts: 235
That 10's of µV applies to plain electron dragging by a non uniform field, it does not apply to the cylindrical homopolar generator which uses v X B.Exactly what happens and that augmentation is called spin polarization.  I'll dig out the formula relating magnetization to spin polarization.
Smudge

My generator is not based on the principle of the cylindrical homopolar generator. In this case, the voltage should be proportional to the diameter. But when the sliding contact is at the end of the axis instead of the cylinder surface, the same voltage is observed. I did the test with an axis terminated by a cone whose tip engaged in a curved support.
And the voltage is 50% that of a Faraday disc the size of the magnet instead of about 5% that it should be, because the diameter of the axis is 5.5% of the diameter of the disc / magnet.


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Full Member
***

Posts: 235
Hi All
Have any of you tried to use piezoelectric materials in magnetic fields, in order to use Lorentz force in dielectrics due to the mechanical displacement of charges?


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   

Hero Member
*****

Posts: 1467
Hi All
Have any of you tried to use piezoelectric materials in magnetic fields, in order to use Lorentz force in dielectrics due to the mechanical displacement of charges?
Only to cause NAR or permeability modulation by compression waves in ferrites.
   
Full Member
***

Posts: 235
What means "NAR"?


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Hero Member
*****

Posts: 2990
Nuclear Acoustic Resonance

was making me itchy that you received no answer !
   
Full Member
***

Posts: 235
Nuclear Acoustic Resonance

was making me itchy that you received no answer !

Thanks, Chet!


---------------------------
"Chance favours only the prepared mind."  Louis Pasteur
   
Pages: 1 2 3 4 [5]
« previous next »


 

Home Help Search Login Register
Theme © PopularFX | Based on PFX Ideas! | Scripts from iScript4u 2019-03-24, 05:01:10