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

[hartiberlin]

Hi Mark,
sorry, my comments to you were a little too harsh I guess.
Sorry about this.

Well, I don´t agree how Steorn is running their company and what they
have done in the past, as you can read here in the older postings.
For their past doings I was a very skeptic about them and their old
Orbo and how they managed all their old demo, etc...

But now I guess they might have something valid with their
new eOrbo.

But that does not mean, that I jump now onto their bandwaggon and
invest all my last money with them.

I will wait and see, what they will present in January.

I would rather try to build a solid state unit on this effect myself...

Regards, Stefan.

[markdansie]

@Stefan
I too was a little bit harsh on you so I apologise. I do have great respect for you and enjoy following different threads on this forum. I also have great respect for many contributors and on going projects.
I guess we will all have to wait till January to see what Steorn comes up with. Given their past I am not too hopefull.
I would feel blessed if I had 5% of the knowledge of people like MileHigh, but I am always willing to admit I do not. However like I said I always surround myself with people who do when working on projects. My role is as a facilitator and to protect investors from being ripped of by testing claims.
Please have a great Xmas
Kind Regards
Mark

[broli]

Hi all,

In a positive note and a question, can we assume that those toroidal coils have a very low permeability to allow them to switch the core off with that few turns coils on them?  With even all 4 coils in series, we arn't looking at more than .5 to 1 ohm I would say and peak current with a NIMH battery in the 1.2 to 1.3 amp range.  Ideas, comments from builders???

Ho Ho HO to alllllllll......

Permeability in the case of the orbo is meaningless. A relative permeability of 200 or 1 000 000 will probably give the same torque and will need the same current. The magnet is emitting a certain amount of flux, both cores will be able to capture most of it about equally. The most crucial part is amperage not permeability or core saturation. The magnet can be seen as a very strong coil, what needs to be done is finding an equivalent amperage and amount of turns to cancel the field of this magnet, wether you choose 1000u core or 1milu the amperage to cancel the field will remain almost equal.

So when picking a good material anything above 200 and is non conductive is good. The only property that should be inspected is coercivity, this property should be as low as possible as it has no use in the orbo besides heat loss.

To sum it up:

-Anything above 200 relative permeability gave the same force attraction in my simulations.
-Use a soft magnetic material that doesn't retain magnetic strength after the field is gone.

[PaulLowrance]

broli's right except he exaggerated a bit. The field from the magnet in the eOrbo must go through air as well, so the cores effective permeability can be on the order of 10 for a good toroid core. A lot of core has permeability far less than 10, such as cores made from powdered iron, so it can make a difference in the magnetic attraction between the core and magnet.

[k4zep]

Permeability in the case of the orbo is meaningless. A relative permeability of 200 or 1 000 000 will probably give the same torque and will need the same current. The magnet is emitting a certain amount of flux, both cores will be able to capture most of it about equally. The most crucial part is amperage not permeability or core saturation. The magnet can be seen as a very strong coil, what needs to be done is finding an equivalent amperage and amount of turns to cancel the field of this magnet, wether you choose 1000u core or 1milu the amperage to cancel the field will remain almost equal.

So when picking a good material anything above 200 and is non conductive is good. The only property that should be inspected is coercivity, this property should be as low as possible as it has no use in the orbo besides heat loss.

To sum it up:

-Anything above 200 relative permeability gave the same force attraction in my simulations.
-Use a soft magnetic material that doesn't retain magnetic strength after the field is gone.

Thanks for the info. We do have some thinking people out there.

Ben