Kapanadze Cousin - DALLY FREE ENERGY

[conico]

 Hi Itsu,
The signal up and down in the drains is caused by 28 turns and 12+12 turns coils from the yoke.
The way you wound that coils tell me that 28 turns have influence for 12+12 turns and you have a strange signal in the drains.
Maybe you must have one coil up to another. Is just my supposition
Have a load for 28 turns coil and see the signal in drain.

[itsu]

Hi conico,

yes, i think that is what is happening, there is some feedback (mutual inductance) from either the 28 turn or 3 turn secondary on the 2x 12 turn primaries during resonance causing this wave like drain signal.

I loaded the 28 turn secondary with a 100W/220V bulb which lit up somewhat during resonance, but still the wave like signal was seen on the drains, so i think it comes from the 3 turn secondary.

Thanks,  regards Itsu

[NickZ]

  Itsu:
  Good to see you're still working hard on all of this.  I didn't know if you were still in the game.  Yes, No?  Looks more like... Yes.
 
  My inductor on the grenade also heats up, as well as the yoke. Although the fets stay fairly cool, even without fans or heatsinks.
 
   Do you find any benefit in using your home made TL circuit, compared the the ready made board that you bought through Ebay?
As I'm still considering going that route myself, with the ready made TL board, in an effort to un-complicate things, if possible.
  I guess that there are no commercial mosfet driver circuit that can also be implemented in this case, to drive the IRFP260N?
 
   As there's been a lot of discussions about the mosfet snubber circuit, and which one to use. Is there one that you would still recommend to use along with the commercial TL board?

  As different loads can give different scope readings, and can also affect the shape of the wave forms. Maybe try some other bulbs on as well, to see if there's any difference in the wave form shape, and just how many of those bulbs it can light. Which would give some idea of the output power that those drivers can provide.

  Thanks for sharing your video, and ideas.
                                                                  NickZ
 
   

[itsu]

Hi Nick,

working on it or parts of it so now and then yes.

I just tested it with the ebay bought tl494 circuit and the signals / output are the same so it can be used too.
The duty cycle adjustment on the home made one confirms that going lower in duty cycle only worsen the signal.

I did not look into a commercial MOSFET driver circuit as these MOSFET driver chips are so easy to implement.

Concerning the snubber circuit, i would go for the RC setup as mentioned in my earlier post and use the linked website to calculate the needed R and C values.

That way the resulting resonance sine waves in the inductor and grenade are as clean as possible.

There is minimum interaction between the inductor and the grenade the way i have wound it (CCW, CW, CCW) so i don't expect to see much power transferred.
The 40W bulb is not even half way lit now.

The latest info seems to suggest that the Grenade should be wound all in the same direction, so CW, CW, CW 



Itsu

[Jeg]

Dog-One,  Jeg,

that is basically the same snubber setup as in Olegs green box setup, he has only 1 resistor while you have 2, see blow up below (ignore the red circle).
I tried it but it did not work for me, i still had massive ringing (1.4MHz) when the MOSFETs shuts off.

It would be good to see if Jeg has better results

Itsu.
I have the same results with you. I mean that with allega's snubber, oscillations still exist. It is just that it cuts the first higher peak of the oscillations down to half value than without the snubber.

Your result using the snubber calculator is remarkable. I will try to do the same. Don't you think that a diode is missing from your drain? (cathode to drain anode to source)? It will ground the negative peaks as they can't be grounded through your tvs combo. I think.