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

[gravityblock]

I've began my replication.  I'll keep you updated after I get my toroid wound and the circuit completed.  I plan on using 4 sets of neo magnets with a diameter of 12.7mm

http://www.youtube.com/watch?v=12bNJ9vVsKc


GB

[plengo]

Hi Fausto,

I do not think you ought to expect the same results with a magnet as the core with respect to an iron core. The permeability of the Neo magnet practically is 1 (you rightly say it is like a core that is always saturated) so your test with the magnet as the core is like as if you did not use any core in your coil, i.e. you measured the response of your air cored bifilar coil.
(If you still have the setup you may want to repeat the test without the magnet, no core at all, you should receive the same results like with the magnet as the core.

Gyula

Thanks Gyula for the idea.

So I did the test with the same coil but this time no core as you said. The results were NOT the same with the magnets but the same as with the iron core.

Fausto.

[gyulasun]

Thanks Gyula for the idea.

So I did the test with the same coil but this time no core as you said. The results were NOT the same with the magnets but the same as with the iron core.

Fausto.

Hi Fausto,

Well, that is strange for me because normally an iron core increases the self-inductance of a coil, this means the low frequency response improves if the coil with that core is used in a transformer and normally the high frequency response suffers with the iron core (of course the quality of the iron core is of paramount importance in this respect).
Now that you replaced the iron core with the Neo magnet I thought you should get the response of an air core transformer for the same 1:1 bifilar coil pair, and this normally means the low frequency response is ruined (air core transformer will work from a much higher 'low' frequency than with the iron core) and normally the high frequency response improves or remains the same if the iron core used earlier is pretty good at that high frequency range.
So sorry that I am mistaken in the magnet core case, and you found the same behavior with the magnet core like with the iron core case.
Would you mind showing a picture of one of your  bifilar coils you made the tests?  Just wonder how they look like, also what kind of iron core you used?

Thanks, Gyula

[gyulasun]

Hi All,

Does any one have any more information on that pendulum you see at the start up.  I hope there is NOT a coil hidden in the base.

Ben

Hi Ben, 

In fact there is another thread on that pendulum setup, besides what 'powercat' showed you.  It is here: http://www.overunity.com/index.php?topic=8555.0  (Stefan started later his thread on it).

The reason I tell this is that member 'capthook' made a small analysis on this setup, see here:
http://www.overunity.com/index.php?topic=8555.msg218708#msg218708

So all the energy seems to come from the side plates falling down by their appropiate weight in the right moment to kick on (repel) the just incoming pendulum edge magnets.
Here is the youtube channel of the 'inventor':
http://www.youtube.com/user/gdelk123  (He has not commented the video responses for 3 weeks now, unfortunately.)

Now this all was off topic, sorry for this from all others.

On your 1V Steorn motor: maybe in this particular setup of yours (excellent as usual) I think you could use reed switch instead of HEXFET, because maybe the total consumption considered would be less (no control circuit power waste) and this would compare better to the demoed Steorn motor (if your aim was to "beat" them in power consumption of course).
Your single coil has a 600mH self inductance as you mentioned, and with a temporary reed switch usage you could probably better study any collapsing flux recovery when this huge self inductance wakes up from any saturation than with the FET switch (the latter has the built-in body diode).

Thanks, Gyula

[callanan]

Nice, but I sure wouldn't want the job of centering & drilling those holes.     At least not with my tools.

Hi PL,

Actually that is why there are so many bolts. The bolts are only 2.5mm thick yet the holes I have drilled are 5mm in diameters. This is to give me plenty of play. So when I put it together, I tighten the nuts loosely and spin the rotor. Sure the whel will be offset to centre at first but then I spin it by hand and use a fixed guide to centre it while it is spinning. When centred, I then tighten the nuts tight. I can get a nearly perfect centre this way. It works very well.

Regards,

Ossie