Kapanadze Cousin - DALLY FREE ENERGY

[TinselKoala]

@magpwr:

I think your scope display is unstable because the scope is re-triggering multiple times within the pulse group. You may be able to get a more stable display by setting the "Trigger Holdoff" to a value that is large enough for one whole screen, or at least one pulse group, to go past before the scope re-triggers. Look in the Trigger Setting Menu for the "Holdoff" item and adjust it appropriately, this may work to give you a more stable display.

http://www.youtube.com/watch?v=jeTlcroP0Ls

[magpwr]

@magpwr:

I think your scope display is unstable because the scope is re-triggering multiple times within the pulse group. You may be able to get a more stable display by setting the "Trigger Holdoff" to a value that is large enough for one whole screen, or at least one pulse group, to go past before the scope re-triggers. Look in the Trigger Setting Menu for the "Holdoff" item and adjust it appropriately, this may work to give you a more stable display.

http://www.youtube.com/watch?v=jeTlcroP0Ls

hi Tinselkoala,

I just realized that in video i was only showing the expanded waveform in the scope at 100ns setting but at around 20us you would only see lines which represent the nanosecond pulse in the scopes at
20khz....35khz which would not reveal much.

I just remembered seeing similar ringing waveform in some of the Akula video once nanosecond pulse is expanded related to some of the low power self running device using the fly back ferrite core without Earth.
I think there are few videos.

But at this early stage of the experiment i have not yet gone deeper and figured out the relationship between the high frequency ringing waveform after the nanosecond pulse and the resonance frequency or one of the harmonics frequency of Kapanadze coil.

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I have attached 2 waveform which i have forgotten to embed into youtube video upon disconnecting HV supply along with Mosfet Drain to primary coil and another waveform which show a screenshot of 74HC132 Nanosecond Generator output without directly connecting to Mosfet driver.

Ideally Mosfet driver I/C needs to be properly coupled with capacitors at it's supply since it's used for nanosecond pulse purpose in order properly drive the Cree SIC Mosfet.




 

[SeaMonkey]

But at this early stage of the experiment i have not yet gone deeper and figured out the relationship between the high frequency ringing waveform after the nanosecond pulse and the resonance frequency or one of the harmonics frequency of Kapanadze coil.

Switching circuits are notorious for their ability to produce
multiple frequencies simultaneously due to distributed
inductance and capacitance.  Harmonics and other parasitics
are difficult to avoid.  In most applications they're a nuisance
and are filtered out or otherwise suppressed.  In other cases
they may be highly desirable.

[Dog-One]

Ideally Mosfet driver I/C needs to be properly coupled with capacitors at it's supply since it's used for nanosecond pulse purpose in order properly drive the Cree SIC Mosfet.

I also found an interesting tidbit reading the spec sheet for that MOSFET.

It is recommended the gate be pulled below ground by five volts.  Not real sure the best way to do that with an IXYS driver.  I suppose you could use a five volt DC-DC converter between the circuit ground and the MOSFET source.  That should give you the best possible turn-off time.

[TinselKoala]

@magpwr:
I guess my explanation wasn't clear enough, sorry. At any rate, I suggest you try varying the Trigger Holdoff until you can display that waveform stably.

By the way, your "nanosecond" pulse generator appears to have a pulse width of over 60 nanoseconds, as shown on both the scopeshots above. The rise and fall times from the chip do appear to be quite short but as you can see from the gate waveform, you still aren't able to drive the mosfet that sharply. Indeed, the gate waveform would seem to indicate that the mosfet should be fully on, or nearly so, for the better part of 100 nanoseconds. (I'm looking at the duration of the part of the pulse that exceeds about 4 volts.)  It would be revealing to show the relationship between the Gate waveform and the Drain waveform on the same screen.