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

[Groundloop]

@ramset,

I got my 6 hours sleep tonight. Then I wanted to see if my new motor will run.
And it does, but I keep blowing those Hall sensors, so I will try out either a pickup
coil or a Read switch.

Groundloop.

[Jimboot]

Hi All,

Please see the following video of different magnet arrangements for use on the rotor of your Steorn motor replication.


http://www.youtube.com/watch?v=JDCfUhs5hwM


Regards,

Ossie

Great vid Ossie thanx.

[gyulasun]

....
I have done one observations so far, the generator coil has zero volt when I remove the magnets. The generator coil has plenty of volts when the magnets are there. This proves that the toroid coils DO switch the magnetic field on and off to some extent. And, THAT is the important feature on this test circuit.
....
Groundloop.

Hi Alex,

Thanks for your excellent contribution with these ideas.
I would like to show for members here a "free"  flux 'amplifier' applied to your idea because it is able to increase the induction several times, as if you were using much stronger permanent magnets, attached to the ends of the toroidal cores. 

The outer ends of both permanent magnets are open, and if you make closed magnetic flux path via soft iron bars or a C core as I drew it in your earlier attached picture, then the desired flux increases manifold.

Of course this modification has sense only if your original open magnet end idea shows 'promising' results in itself, near in the COP>0.7-0.8 values.
Obviously the input coils also have to be optimized for getting the highest saturation in the cores versus the lowest input power.

Thanks,  Gyula

[callanan]

Hi All,

Please see the following video of the new magnet arrangement and how it causes a violent cogging effect due to the intense magnetic attraction of the magnet pairs to the toroidal coil's cores. The rotor is very hard to turn slowly by hand.


http://www.youtube.com/watch?v=ZszwAMEGuJI


Regards,

Ossie

[gyulasun]

Hi Ossie,

If I see it correctly, two of your L shaped coil holders are made of steel and unless they are non-magnetizable SS, the magnet stacks can attract to them too, not only to the toroids.
If this is soo, then the toroids cannot fulfill their 'masking core effect', the strong magnetic flux will penetrate through them to the L holders too, making the cogging effect ALSO when you apply input current to the coils.

Thanks, Gyula

EDIT: if the L shapes are not steel but say Aluminium, then some eddy current induction can happen, though this cannot cause cogging as significant as the direct attraction in case of steel.