Kapanadze Cousin - DALLY FREE ENERGY

[Vortex1]

Regarding the Ikako Chibinidze video:

First I agree with verpies thoughts on the flyback transformer.

I'd like to add that we should be able to rule in or rule out normal transformer induction of the RF  output coil with a bit of reverse engineering if we could get a handle on the following:

1) What is the actual power dissipation in the bulb?

2) What is the size of the gap (voltage breakdown)

3) What is the value of the discharge capacitor i.e how many pulses per second of what energy magnitude are required to transfer the required power to light the lamp?

Then we could take a closer look at the flyback transformer. Modern flybacks from TV sets are designed with multiple secondary windings to handle the power for the entire set. The high voltage winding is much lighter duty, designed to maintain anode potential on the CRT being lost by electron emission from the cathode.
Can this winding really support the power dissipated in the lamp?

The ferrites (as noted by verpies) are designed for flyback operation not forward push pull operation. But I doubt the HV secondary can handle enough current to provide 200 Watts or more of power. I could be wrong but would like to attempt to disqualify normal transformer induction in the RF output coil.

We might guess from the video  that the two 80 turn windings are bifilar and presumably wound in the same direction. This would put the dots at one end of the coil form for these wires. Let us assume the dot wires feed the transformer. This would create a null output for ordinary induction as the pulse voltage would effectively cancel (not counting the smaller winding with the capacitor).


Food for thought and summary:
If the two 80 turn windings are in series connection (properly phased for normal induction) then all we have is a RF transformer being pinged at the spark gap frequency. This could probably light the bulb shown, but the spark in the gap does not look intense enough to carry that wattage considering the turns ratio 3:160. The flyback transformer HV winding alone may not be designed to carry the power being demonstrated. If anyone can estimate the gap distance, we would have a good idea how high the capacitor is charging before discharge in the gap. We can then calculate the energy per pulse (if we knew the cap value) and get the approximate necessary pulse repetition rate to sustain the lamp at some reasonable level of brightness as shown in the video.

If none of this adds up, we have something unknown and  interesting going on in the RF output coil. Keep a rad meter handy.

[TinselKoala]

http://www.youtube.com/watch?v=gz0IPdPbHvA
at 2:29 / 2:30

That's the spring clip that's used to hold the two halves of the flyback core tightly together. There will be a groove in the ferrite pieces to accomodate this clip, and the ferrite halves themselves will have a very thin spacer in the mating surfaces to maintain a slight magnetic gap when the clip pulls the core pieces together around the secondary capsule.

[verpies]

I have to disagree with you about the Royer oscillator not being appropriate to drive modern rectified flyback transformers. I've made all kinds of flyback drivers and the Royer oscillator is the easiest and best to use in my experience,

I welcome  your disagreement followed with rigorous thinking.
I don't deny that modern rectified flyback transformers (RFBT) work when the primary is supplied by Royer Oscillator, I just claim that they do not work efficiently when the primary of such transformer is supplied with AC.  The main reason for it is that an RFBT is not really a transformer.

An AC driving signal is less than perfect because it's sinusoidal, not because it's AC.

When I wrote AC I meant just that - a current waveform that reverses polarity.  I did not synonimize AC with a sine waveform.

A square pulse works better because of the fast risetime.

Yes, di/dt is important for the operation of RFBTs.

The "AC" or "pulsed DC" nature of the current in the primary is unimportant to the voltage rise in the secondary even if the secondary is rectified; it is the rate of change of the current that is the determining factor.

Yes, di/dt is important to the magitude of EMF but which di/dt do you mean?  The rising edge or the falling edge ?
They are the same for sine or square waveforms, but for others they are not.

I think you can prove this to yourself by using the offset function on a FG. Set up a transformer with the secondary feeding a diode, just as in a flyback.

In my case, I am feeding a resistive load through a HV diode connected in series to the secondary winding (the diode conducts during the falling edge of the primary current).

Stimulate the primary with a true sine wave, AC, symmetrical about the zero baseline. Then use the offset function to raise the signal up until it's all above the baseline, or lower it until it's all below the baseline. What happens to the output voltage of the secondary?

Across the load, the voltage amplitude is 5V on the rising edge and 790V on the falling edge of the primary current.

...the rest later

[Hoppy]

That's the spring clip that's used to hold the two halves of the flyback core tightly together. There will be a groove in the ferrite pieces to accomodate this clip, and the ferrite halves themselves will have a very thin spacer in the mating surfaces to maintain a slight magnetic gap when the clip pulls the core pieces together around the secondary capsule.

Thanks. It threw me as I have a few flyback's laying around and none of them have this clip and groove.

[Hoppy]

Watching the manual switching sequence carefully shows that the croc earth lead is needed for lamp illumination. At one point the switch on the transformer is operated and the lamp does not light. The guy then realises that he has the earth lead disconnected. When re-connected and the switch is operated again, the lamp lights. This device does not seem to work like the Tungus device that appears not to need the earth lead to self-run.