Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Nick,

the 40W/220V bulb connected to the Grenade output is putting out still the same brightness when in resonance (half bright).
The 24V batterypack then supplies 6A, so 144W in, so most of the power is lost in the inductor coil which gets hot quick.

I guess it was worth the waiting when you finally get the Siglent Nick.


Itsu

[NickZ]

   Inefficient yes, as it's built to work in another way, compared to a regular inverter.
The increased output will only be noticed when the kacher is doing it's job properly.

I've ordered the snubber resistors, for both of the snubbers.

[AlienGrey]

AG,

this 3 times relation you mention, is to my knowledge not about the resonance of the wima cap/inductor compared to the kacher frequency.

Its the relation of the resonance frequency of the Grenade compared to the kacher frequency.
Like in my setup where i had the Grenade resonating on 2665Khz (2.665MHz) and had the kacher tuned (via a ferrite rod) to 1/3th which was 888Khz.

Ontop of that realtionship, there also has to be a 50x, 60x or 100x relation between the wima cap/ inductor resonance frequency and Grenade resonance frequency 

My setup was tuned for:
2.665Mhz grenade resonance frequency
888Khz kacher frequency (1/3)
26.6Khz wima cap / inductor resonance frequency (1/100th)

See this video: https://www.youtube.com/watch?v=1Tgkg1XrDlk


At least that was how i understood the important relationships.

Itsu

Itsu I was going over some of your information you shared on this post I recall you saying you failed to achieve to gain Akulas goal, If I remember correctly somewhere in that or a similar video he mentions a threshold where he says the focus lies, I'm pretty sure the frequencies you quote are far too high and you may do better to look lower.

Regards Allen

[NickZ]

   So, looking lower, I hit on it... Radio Moscow. Suddenly the device starts to sound just like Geos does.
The silence was gone... and the bulbs get brighter, big time.

   It's not that easy to find, that sweet spot, as I had searched for it throughout all of the full ranges of what the TL494 controllers can do.
   So,  I placed just a smaller 50w bulb on as the load, and started seeing a tad of increase in bulb brightness with the Kacher on. Light at the end of the tunnel, you might say. Then all of a sudden, while moving the yoke, just like Geo showed, there it was, doing the Geofusion ringing thing.  After it's been silent up to that time. There it is was... I had found the sweet spot.

   So, I went to take my dogs for a walk, and when I get back, I can't find the sweet spot again,  no matter how I adjust the controllers. Oh,  where did it go?... Where is that silly wabbit.   But, I did find it again,  and again.
However,  one of my fets gets real hot if I stay there too long. There's always a "but",  but so what...
   Radio Moscow at last...

   PS:  You'll know it when you hit on it. It starts ringing in Russian. Oh, don't forget the vodka, and cigs.  Or you'll never see it.
   

[Void]

Hi Itsu. If you still have your PWM connected to the ferrite yoke (or equivalent toroid)
with the series resonant loop going to the grenade, and, if you have
some time at some point, I wonder if you could check something for me?

Would you be able to wind a few turns on a ferrite toroid to make a
homemade current transformer and place it over the wire on the series
resonant loop (like Ruslan did previously), and connect one scope probe
to the homemade current transformer output and a second scope probe to show
the output voltage across the two output wires on the grenade coil with
the PWM running? A commercial current probe may include phase shift correction,
so I wanted to see if possible how it works for you when using a simple homemade
current transformer as Ruslan did previously, for comparison.

I just wanted to compare the phase difference that you are seeing between
these two waveforms to what I saw in my own tests. In my own tests using a
homemade current transformer like that, I did not see the 90 degree phase
difference between the two waveforms (loop current and grenade output voltage)
which Ruslan showed in one of his old videos. Just wondering what you get
when you use a homemade current transformer on the current loop? I see
either 0 degrees or 180 degrees phase difference (depending which way the scope probe
wires are connected), not the 90 degree phase difference that Ruslan showed (with
the Kacher turned off). 


Nick: That funny noise you mention may just be a spot where the
PWM goes unstable (parasitic oscillations or similar). That might well explain why
the FET gets hot. You would likely be able to see what is happening by looking at the
Drain to Source waveform of each of your PWM driver FETs with your scope
when it is happening. Would be informative to see what the scope shows
on the PWM driver FET waveforms when that is happening. It is interesting that you
see a little effect from the tesla coil when the PWM is doing that however.