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

[gravityblock]

This may help in choosing the right core material, http://info.ee.surrey.ac.uk/Workshop/advice/coils/terms.html


GB

[callanan]

Hi All,

Tests I have done have shown that if the attraction between the magnet and toroid core is too great for the particular coil and core material there will be more losses in the process and so a balance needs to be found for optimum operation.

With that, I have found what I consider to be the best possible magnet and coil arrangement for my motor and now have measured the best efficiency for this motor. I don't think I am going to beat this level of efficiency.

Also, I have found that the best way to trigger the switching circuit for optimum performance is to simply wind a trigger coil of about 100 turns around one of the toroid coils.

With my current configuration I can achieve a consistent 750RPM for only 239mW of input power!

Please see the following video for further details and the circuit & waveform across the coils is attached below.


http://www.youtube.com/watch?v=sdSci8CKD74


Also, because I believe I have reached a limit to the efficiency, with the current materials I am using, I believe I will now need to increase the number of magnets, coils and possibly rotors so as to be able to generate some usefull torque and possibly even self run if this is indeed possible with this motor.

Regards,

Ossie

[Omnibus]

I agree. That is the main issue.

If Steorn can prove that almost no energy is transferred into the rotor then it will prove they have an OU technology.   

How can we obtain these data? I'm banned in the Steorn forum so I can't post a thread there to that effect. Could you please do it if you have access there? I wonder if you or someone else is in contact with Sean McCarthy to ask him if he would relesae the data from December 19th demo. Also the data in Naudin's experiment can be analyzed in the same manner. I wrote him an e-mail asking him if he could provide these data. Haven't gotten a response from him yet. As far as I remember Aussie and Naudin had an e-mail exchange. Maybe Aussie too can ask him to do that.

Also, there are replicators here who may have digital storage oscilloscopes. They may be willing to help in this respect -- take the U and I traces at steady-state and dump the data into an Excell spread sheet as well as measure the precise value of the Ohmic resistance of the coils. Something has to be done to have a definitive answer sooner. Not only we don't want this to drag itself as another Mylow or Mike saga but also, unlike many other experiments, to obtain the decisive answer in this case is very very straightforward.

[penno64]

Hi All,

My first attempt at winding a toroid was a disaster.

I measured out 20 meters and fed this onto a home made shuttle.

At the point where the shuttle would no longer fit through the centre, I uncoiled the remaining .5mm wire and began the slow process of feeding this through.

I reached a point where I could no longer fit the wire through the centre and had to cut the remaining 7 mtrs off.

Nonetheless, I wanted to try running 12v through the coil and see the effects on my 19mm x 28mm cylindrical magnets (ndfeb). Much to my disappointment, my coil did not release the this magnet, nor even the smallest magnet I could test.

I fear I must have missed a fundamental concept in winding toroids.

I have viewed Ossies winding videos several times over and even though he winds them quadfilar, I thought I could get a tighter fit with a single wire (NOT). At least at the completion of his winding, you can still see through the centre of his coil.

I considered posting a pic, and thought better of showing my disaster.

Guys, any clues greatly appreciated.

Kindest Regards, Penno.

p.s. Great work Ossie, I am so jealous.

[samedsoft]

"
With my current configuration I can achieve a consistent 750RPM for only 239mW of input power!
"

Dear Ossie,

  Coul you please attach an efficient 12VDC, 5 W motor to your shaft? You can find in old CDROM etc..

   If you could find a such small DC motor with 750 rpms and attach to your shaft I beleive you will show self runner righaway..

   Maybe you can also add a buffer cap to start and regulate the system?

   Can you let me know the specs of the magnets and toroidal core? Also tore winding (gauge, number of turns..)

   Thanks and Best Regards.