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

[PaulLowrance]

Opps, my mistake. In a recent post I suggested that Steorn is using Bonded NdFeB magnets, but that was wrong on my part. I forgot that Steorn's magnet gauss measurements was on an open faced magnet that was not between two magnets, and therefore the field will be half the value.

So, 500mT is normal for a strong sintered NdFeB magnet during open faced measurements. It seems that Steorn is using either SmCo or NdFeB sintered magnets.

[gravityblock]

Sure but these are completely two different stories. One is about the colapsing field which is catched by the coil and the other one about magnetic interactions between magnet and the core. There is nothing in common. End of story ;]

What is common between the two different stories is the metglas core doesn't want to release the flux, and the flux from the pulse never dis-engages the core during the collapsing field in order to cut the wires to induce a BEMF.  End of story. 


GB

[PaulLowrance]

What's so brilliant about Steorn's design is that the ultra high permeability core easily saturates with a relatively small amount of current, thereby producing a closed magnetic loop, which means the magnetic is no longer magnetically attracted to the core. So while the toroid current is off, the magnet is attracted to the core, but when the coil current is on, the magnet attraction decreases. So in theory, a small amount of energy from the coil makes the toroid vanish from the magnet, and so the magnet can move away with less attraction. The Metglas ultra high longitudinal permeability means it requires far less energy to saturate the core longitudinally.

Steorn, you're brilliant! 

[Airstriker]

What is common between the two different stories is the metglas core doesn't want to release the flux, and the flux never dis-engages the core during the collapsing field in order to cut the wires to induce a BEMF.   End of story. 
GB

If it never disengages the core, then why is the magnet being attracted to the toroid again ? Sorry but you story is bullshit

[Airstriker]

What's so brilliant about Steorn's design is that the ultra high permeability core easily saturates with a relatively small amount of current, thereby producing a closed magnetic loop, which means the magnetic is no longer magnetically attracted to the core. So while the toroid current is off, the A is attracted to the core, but when the coil current is on, the magnet attraction decreases. So in theory, a small amount of energy from the coil makes the toroid vanish from the magnet, and so the magnet can move away with less attraction. The Metglas ultra high longitudinal permeability means it requires far less energy to saturate the core longitudinally.

Steorn, you're brilliant! 

And where are now all those disbelievers ?