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

[PaulLowrance]

Hi Paul,

I was able to find  some 1" OD disc magnets here: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=469-1000-ND 

They are rated at 10800 Gauss.  10000 Gauss = 1 T.  So 10800 Gauss gives us 1.08 T.  I think that should work fine, would you agree? 

Thanks!

Bruce

Hi Bruce,

Great find! That's about as close to 1T (or 0.5T for one side open faced magnet) as it gets. Do you or anyone else know how thick the Steorn magnets are?

[PaulLowrance]

Ok guys, I've made an attempt to visualize what the magnitization cycle could be as I understand it right now.

The idea is that the coil is mostly at a remanent magnetic status while rotating.
Only shortly after the magnet passes the coil some action is changing the core status.

Let me know whether you agree with this.

[update]
Rotor is moving clockwise
Only in situation 3 the permeability is at maximum value at a very short time.

Hi teslaalset,

One important thing I did not see in your diagram was that the magnetic field from Metglas core rotates as it tries to align with the magnet, but when the coil current is turned on the Metglas cores magnetic field easily changes such that it forms nearly a perfectly close loop near full saturation. IMO that's where the excess energy effect is caused  by because it requires very little energy to change the Metglas *longitudinally* annealed core field to closed loop, which decreases the magnets attraction to the core. So IMO it's not all that important if the core remains nearly saturated the entire time, but where the dipoles are pointing and where they change during the entire cycle.

[happyfunball]

Cancellation only of the CEMF, NOT of the attraction...LOL

How do you figure that would happen? If the coil is on the center line between an N and S magnet, it can neither attract nor repel, no?

[happyfunball]

delete

[PaulLowrance]

@Paul,
I'm still having a bit of trouble deciding which metglass for me to order today.  I remember seeing that you posted your order the other day on this thread, for some reason I don't see it.  Maybe the graphic didn't load for me when I scanning back to find it.  But could you tell me again exactly which ones you ordered, and then if you could give me your opinion on the exact ones I should order?  What I mean is this, if you had to build a second one to test other criteria, what would you use?  I'll order that one, and then we see both results.

Hi Captain,

Here's the link,

http://www.overunity.com/index.php?topic=8411.msg222189#msg222189

Elna Magnetics
http://www.elnamagnetics.com

Some of those cores you won't want unless you plan to replicate the J.Naudin's MEG. Also, elna may be out of stock for some of those core sizes, so you can do a search for other MAGAMP cores. I don't recall how to do that at elna, so let me know if you figure it out lol. btw, all of my MAGAMP cores are small compared to Steorn's. My largest one is ~ 0.8" OD, and Steorn's seems at least 1" OD, no? You might want to order various sizes if possible, at least a 1" OD and larger.

If Steorn is using Metglas cores, or if not then maybe they will, soon, then I'd love to buy some Metglas stock.     Is that legal? I mean, what we know here is not considered company insider information, is it?