STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[gravityblock]

As stated too many times already. That extra force and torque comes at a heavy price. You can more force & torque by moving the magnet closer, but that's suicidal, which is why Steorn does not do that, because it requires too much current to fight the magnet-- P=I^2*R

I'll give you that.  Take a look at this newer video by CLaNZeR attempting to replicate the Orbo, http://www.youtube.com/watch?v=RW2ZNSx7670&feature=channel

I can't believe the magnets are even attracted to the core at those distances or have any torque.  Must be the reason for the magnetic bearings, because it doesn't need much torque.

That is a beautiful replication.

GB

[gravityblock]

Why is the flash presentation on the "M-H Curve and Magnetic Domains" talking about hard ferromagnetic materials needing an opposing field to de-magnetize it completely?  Metglas and other materials retain some of their magnetism after the field responsible is removed but they are considered soft materials.  Magnetic recording tape retains some of the magnetism also (if it didn't, then tape drives wouldn't work).  This is why the magnetic field of the dual magnets must sit on the linear positions of the M-H Curves due to the DC Pulse.

GB

[gravityblock]

Here's a video showing how the magnetic recording tape can act as a permanent magnet.  It can both repel and attract a magnet, http://www.youtube.com/watch?v=IBDVTLx_aTM

I shot the video on my cell phone and it was sitting on it's side so the video isn't showing the correct perspective.  You'll need to turn your monitor 90⁰ to the right or turn your head 90^o to the left, lol.

The magnet is placed on a glass table and the recording tape can repel the magnet or attract the magnet depending on how the magnetic recording tape is magnetized.

This is showing the Orbo effect.  The dual magnets in the Orbo during their departure from TDC are sitting in a position where it isn't attracted to nor repelled by the core material due to the pulse biasing the magnetic field of the magnets where it sits on the M-H Curve of the core material.  When the pulse is cut off, then the core material has 0 magnetization so it will attract at full strength when the magnets make their next approach towards TDC.

This is a really simple concept and the Orbo is based on this.

GB

[PaulLowrance]

Do the inductance tests like Max did in:
http://www.youtube.com/watch?v=VYGSdUdONpw

or like Naudin did in:
http://www.youtube.com/watch?v=ww-F5MfWSGA

Note how much change there is in the inductance and ask yourself what else is changing to cause that inductance change?

What about it? That's complete expected.

See the permeability curve here:
http://www.tpub.com/content/neets/14180/css/14180_137.htm

Paul, you seem to think everyone who doesn't agree with you is stupid or uneducated. Please take the time to perform some inductance testing with your cores, see just how much influence those magnets really have.

I have.  Again, the effective permeability of the core in relation to the magnet is very small, less than 10.  That is well understood in conventional physics.

Paul, you seem to think everyone who doesn't agree with you is stupid or uneducated.

Because, Oc, what you're saying is completely incorrect on such a fundamental level.

[lumen]

I wanted to bring to light a problem with winding toroidal coils for this use.
If you wind a coil with two layers, you should not continue to wind around the coil, you need to wind until you reach where you started, then reverse the direction.
Not the direction you are looping on the core, but the advancing direction around the core.
If you do not do this, you are creating a coil that will in effect have two loops of wire that are susceptible to BEMF from the magnets!
That's why everyone can show some BEMF on their coils.

JLN has a good idea!
I wonder where he found that one?
Patent?