I happened to stumble on this particular website by accident:
http://www.gammamet.ru/en/gm45dc.htm (http://www.gammamet.ru/en/gm45dc.htm)
http://www.gammamet.ru/en/gm515b.htm (http://www.gammamet.ru/en/gm515b.htm)
And my first reaction was :o . That core is incredible efficient and is suited for high currents. This has many implications and uses, especially in the OU field. Most of the times OU effects are measured in mW due to low powers needed to saturate a core but this would allow them to scale up to the 100's W range.
Isn't this similar to Metglas? They also use nanocrystalline type cores and very high permeability materials. Metglas is what Beardon used for the MEG.
Quote from: e2matrix on June 24, 2010, 10:37:52 AM
Isn't this similar to Metglas? They also use nanocrystalline type cores and very high permeability materials. Metglas is what Beardon used for the MEG.
This is not similar to Metglas. Compare the hysteresis loop of Metglas to the Gammamet hystersis loop and you will see the difference. Gammamet has a near 0 hystersis loss and returns to a near virginal state, while Metglas has a significant core loss, relatively speaking. Gammamet has a low remenance, and Metglas has a high remenance. Also, Metglas has an extremely high permeability which will saturate at very low power, while the Gammamet has a low permeability and will require more power to saturate it. I would rather have an OU effect that is 100's of watts instead of mW's.
Thanks for bringing this to our attention Broli. This is an excellent find. Gammamet has a really beautiful hysteresis loop and is nearly perfect.
GB
Thanks for explaining that. I didn't have time to dig into it but just noted that they sounded similar at first glance. This sounds like a very important find.
Like I've been saying for about 3 years...
Ferromagnetic Substances are a great candidate for OU devices.
Thankyou Gavity Block !!!
I believe few here understand
1. Magnetic Permeability.
2. Magnetic Coercivity and it's relation to a hysteresis loop.
3. What Anisotropic Energy might be and it's relation to Bedini/ Joule Thief Spikes.
When you take something that amplifies the Magnetic Field of a Coil by 1 Million times
(and let it crash by turning OFF the energy) --> you might have something !
Sounds like this Gammamet would be a great material for our goal here.
Best Regards,
The Observer
There is one quote I find an oddity.
"The service life of cores is 30 years."
Why ?
UPDATE:
Wow, those are real nice items !
I wrote them an email about that
unusually low lifespan statement.
I will post their answer here
for all to view upon a reply.
I have also asked them about trapazoid split cores
for radial arrangments in advanced pulsed motors.
If arranged correctly with ubber-neo's inline
they can can be used in a parallel-path matrix
to boost alternating attraction by up to 4X.
Remind you of a certain flywheel's magnet shape
of the Ford/Leedskalnin vintage of thinking ?
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Quote from: CompuTutor on July 20, 2010, 09:53:28 PM
"The service life of cores is 30 years."
Why ?
Most simply because the cores are using an organic binder and this ages by time and heat.
The same thing goes for Micrometals Iron Powder cores.
They age as well due to the properties of the organic binder.
Website Quote:
Magnetic cores GM45DС substitute for cores of soft magnetic nickel-iron alloys and ferrites with linear magnetization curve.
I bet the cores isn't any better than well known MPP or Ferrite cores.
They might be equal in performance but cheaper and this would be the sales issue.
Quote from: broli on June 24, 2010, 08:23:36 AM
That core is incredible efficient and is suited for high currents...
I am looking to build the Alfred Hubbard device: (Page 48)
http://www.free-energy-info.co.uk/Chapter5.pdf
But I cannot get iron tube. Will the material of these cores,
powdered and cast into a tubular form be as good or even
better?
@Broli
Try these cores.
http://www.cwsbytemark.com/index.php?main_page=index&cPath=206_218
Molypermalloy is among the best material on the market and it's easy to get.
It has extremely low hysteresis and eddy current losses.
Companies have been using MPP for decades in order to reach maximum efficiency.
If this doesn't fit your needs then there is 3C20 from Ferroxcube.
http://www.ferroxcube.com/appl/info/gaptoroids.pdf
It has slightly better performance at the expense of size.
Meaning that you'll need a bigger core to transfer the same level of energy as MPP.
But the efficiency of 3C20 is slightly better than MPP in the range of 1-2%.
MPP is machinable.
3C20 isn't.
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I don't really think these GAMMAMET cores are very well suited to our needs. I mean, they are great but not always. The main reason for this is their not very good squareness ratio. This results in low permeability change in saturation state (have a look at the appropriate graph). And unfortunately, this is very important factor if you want high inductance change due to saturation (eOrbo).
On the other hand, have a look at MAGAMP cores:
http://www.metglass.com/products/page5_1_6_4.htm
Their squreness ratio is ideal if you want high inductance gain - huge permeability change in saturation state.
Unfortunately, MAGAMP cores have a bit higher losses than GAMMAMET cores.
To conclude - it all depends what you need. Both are great - in some but not all cases.
By the way: NANOPERM also looks good (similar to GAMMAMET):
http://www.magnetec.de/pdf/vergleich%20nano-ferrit_1.pdf
However, I don't really understand why JLN is using these NANOPERM cores for eOrbo replications. Their hysteresis loop isn't square-like at all ;/
Gammamet core is good for high frequency motor or transfomer due to the very very small hysteresis loop, I have never saw this, the permeability is highly linear also, good for transfomer, for avoiding large current distortion and harmonics.