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Overunity Machines Forum



Self running coil?

Started by gotoluc, March 13, 2010, 12:40:57 AM

Previous topic - Next topic

0 Members and 13 Guests are viewing this topic.

NextGen67

HI Gyula, Gb,

Yes, those are the standard tools to find out either L, C or Freq...

However, to complete the picture, it would be nice to come up with a rule to determine the Capacitance of the mosfet being used (using the data from it's data sheet)...

Something Like:

Enter Ciss
Enter Coss
Enter Crss
Enter Rds(on)
Enter Vgs(th) [ or enter input voltage ]
Enter Vgs [ or enter tank voltage ]

And then the formula would spit out the C[apacitance] value that matches Luc's data (and for any given mosfet).

As for his IRF640 data, one can see that all Frequency's hang around 1533 to 1579 pF. The value of 1578.54 pF probably having the most accurate [and best/lowest 0.0000xx result ]

--
NextGen67


gotoluc

Hi everyone,

I decided to make a video using the 2 identical toroid's of test 15 video to demonstrate what I had done for myself yesterday that the magnet affects a ferrite core toroid more than just dropping it's inductance.

Below are the scope shot of each at the peak efficiency tuning points.

Please note that I had a little bit of tuning problems with the magnet toroid as the efficiency tuning point is super sensitive compared to the non magnet toroid. But I got it at the end just before the 10 minute limit.

Link to video: http://www.youtube.com/watch?v=zQxL9W6gVG4

It is also clear by comparing the data of the two shots that there is a gain in the magnet toroid and this is with identical generator gain to each test as I did not touch the generator output.

Luc


mscoffman

Quote from: forest on March 30, 2010, 02:31:36 PM
remember that  http://www.rexresearch.com/szili/szili.htm

The experiment shown is based on what we now know is faulty.
This circuit supposedly tuned for max overunity actually
represents the worst case of gate energy being made available
to a low voltage supply. Is some overunity energy in there?
We can not tell.

:S:MarkSCoffman

gyulasun

Quote from: gotoluc on March 30, 2010, 02:06:21 PM
Hi everyone,

I decided to make a video using the 2 identical toroid's of test 15 video to demonstrate what I had done for myself yesterday that the magnet affects a ferrite core toroid more than just dropping it's inductance.

Below are the scope shot of each at the peak efficiency tuning points.

Please note that I had a little bit of tuning problems with the magnet toroid as the efficiency tuning point is super sensitive compared to the non magnet toroid. But I got it at the end just before the 10 minute limit.

Link to video: http://www.youtube.com/watch?v=zQxL9W6gVG4

It is also clear by comparing the data of the two shots that there is a gain in the magnet toroid and this is with identical generator gain to each test as I did not touch the generator output.

Luc

Hi Luc,

Could you make a test for me?  It would be this:

Just connect a 533pF capacitor (ceramic or mica or any normal capacitor) in parallel with the toroidal coil that has your split wound coil and also the magnet attached and please repeat the same test you showed in your present video but this time you would find resonance also at around 6kHz like in case of the other normally wound coil that has no magnet atteched.

I would be interested to know the current value.  No need for making a video on it, just tell.   (I know 533pF cannot be had, maybe you could combine some smaller standard values in parallel to make up for it, no problem if you approach it only to +/- 10pF precision, maybe you have a variable capacitor then it would be good to use, together with the C meter first.)

Thanks,  Gyula

EDIT: one more thing: would you measure the DC resistances of the two toroidal coils you have used? thanks.