Kapanadze Cousin - DALLY FREE ENERGY

[Hoppy]

Absolutely stunning !Explain how you were able to have puresharp square wave input to mosfet gate when the output is loaded ! This is very important.

I would say, supply rail decoupling with his big cap close to centre tapped yoke primary plus good control over delay. Its refreshing to see an experimenter showing both current, voltage and scope readings in a video. He also demonstates how the lamp brightness is limited, irrespective of bulb power rating or primary power supply sourced current and governed by the maximum power available to the load when the 3-turn yoke circuit is in series resonance with the load. Excellent video Soliman.

[T-1000]

hi,
hire is my video
pushpullstalkernotgethot.
https://www.youtube.com/watch?v=vk0-rdlupxA&feature=youtu.be

Nice push-pull demo
In addition to control of duty cycle you can try add additional delay chip for each channel. Then tune down duty cycle of each channel to be less than 20% and align it to series resonance. Then you can play with Tesla coil and try to mix that adjustable power on the yoke wih the Tesla coil output. Then see if you can achieve frequency mixing in same fasion as GeoFusion did...
The amount of power going to the series resonance directly relates with the electric field power coming from the Tesla coil in order to achieve effect.

Cheers!

[itsu]

Soliman,

i agree with the above comments, a nice and clear video,   well done!


I do notice some things like your high resonance frequency (gate signals show 28Khz), so are you sure you are at resonance?
Normally with a 20m long like inductor coil in series with a 0.47uF cap it should resonate around 15KHz.

Also the duty cycle shows >48% which is more then the TL494 can provide, so probably the delay chips are doing this?

But i still do see both a 300Vpp spike followed by ringing, without the snubbers, but this spike seems very narrow, so it won't heat up the MOSFETs,
but they could damage them (IRFP260N = 200V) eventually i think.

When connecting the snubber diode at one side, you nicely see the spike / ringing being halfed (top part suppressed).

Attached the Stalker circuit used (i think).

Thanks,   itsu

[NickZ]

   Soliman:
   Thanks for showing your device and making the interesting video.

    However, as you are NOT connecting the 28t yoke coil to the 168t coil on the grenade, and you are just running from the 3t coil, your output is very low. And, therefore you can barely glow the 2 200w bulbs. Also your wattage at the output must also be  very low. So, perhaps that is why your Fets don't get hot.
   
   So, what happens when you turn on the Kacher??? Do you have any additional light at the bulbs.  NO?
That probably means that you are not in resonance, and every time you change the bulbs, the resonant point changes and needs to be readjusted. Or not?

    To make it a comparable test to how the circuits that we are building work, it would be good to have the connections the same as how we have it,(28t coil). Showing some scope shots of what happens when the 28t coil is also connected, and the Kacher is ON.
   By reducing the duty cycle you are also reducing your output at the load. And, I doubt that the system would self run, with that low an output.

    Below, is a picture of your bulbs, and a picture of your voltages. Showing the low voltage output, and low lumin levels of the 2 200w bulbs.
   You may have 300v showing on the scope at times, like Itsu mentioned, but there is very low current going through your system as seen at the output. So, that may be the reason why your Fets don't get hot... I think.
 
   Below is the Stalker TL494 and the 4420 driver circuit that I'm using. It is a more recent circuit, and much simpler as well.
Notice there are no snubbers. And he uses IRF3205 mosfets, with lower resistance, than the IRFP240N.
I replicated that circuit, but my fets, (IRF240, or snubbers) do get hot.
   The snubbers circuits that I've tried on so far, are having their resistors getting too hot, also. 
   So, I'm building the non dissipative snubber circuit next, as there are NO resistors to get hot.
  We'll see it goes...

[soliman]

the photo above is correct. and refers to the stalker circuit.
I want to show you this other photo.
as you can see the photo above represents the gates mosfet
the one below represents pins 9 and 10 of the TL494
this means that the delay system has control over the mosfet to work at the right point.