Kapanadze Cousin - DALLY FREE ENERGY

[magpwr]

Hi Mag,

Good work.  Are you still running with the 1K2 pull-up resistor to the pos rail, thus eliminating the other two mosfets?

hi Hoppy,

The pull up resistor can be as high as 3.3kohms which can be connected to positive supply 12volts or it can even be connected between base and collector since the another end of primary winding is going
to (+).
The resistor is just there to kick-start transistor upon powering on.After which the base of the tesla coil will just do it's job in providing the necessary signal to sustain osc via the base of transistor.
One of the 2 output from pri winding may need to be connected to transistor which eventually needs to be changed to a high voltage version eg:2SC5200 or better once using high dc voltage eg:100...150volts.High voltage is reserve for later stage once yoke is  ready.

This is the clean up i have done as attached-latest version 5.0 for nanopulser section.
At this moment there is 2 possibility
1)Superimpose method which i need to use negative pulse as attached which is in sync with 27khz as attached.This is considered a long-shot approach. as tesla coil is OSC at it's own frequency 1.7Mhz..1.8Mhz which we need to reduce winding slowly to get the right high freq oscillation once the antenna is in place over multi-layer coil.

2)Using another method to power on tesla coil at the peak of 27khz to fire hv pulse at the peak which i will need to connect the top resistor 3ohms to tc4422 to obtain the positive pulse.
   This method i will be testing out today.

[magpwr]

Hi Magpwr. If I understand what you mean, if you send a very narrow pulse in the low nanoseconds width to the Gate
of a MOSFET to pulse the primary of a tesla coil, I don't think you are going to get a very big response on the tesla coil
secondary. This is assuming you could even find a MOSFET that could respond fast enough to such a low nanopulse pulse
width on its gate. From my testing with tesla coils you need at the least a high nanosecond pulse width on a MOSFET gate
if not into the low microseconds width pulse on the gate of a MOSFET, to get a half decent transfer of energy to the
tesla coil secondary. 

In Akula's schematic for his second self runner, he seems to be using those pulses to not actually drive the gate
of a MOSFET driving a tesla coil primary directly, but those pulses seem to be used to somehow sync his
kacher driver to his PWM push pull driver waveform, if I were to guess.  I think there is a little more to it than just
trying to pulse a MOSFET gate with a nanopulse.  See Akula's second self runner schematic where that portion of the circuit
seems to have originated from.

P.S. The nice thing about Ruslan's latest devices is that he doesn't seem to have any sync on the kacher driver,
at least not that he showed or could be seen anyway.

All the best...

hi void,

This is not my plan.Today i will test this method out as shown below later in the day.It's only 8+..am here and it's holiday over here.No Monday blues.
Existing transistor with pull-up resistor is already in place with tesla coil.This part is not effected.

My plan is to use positive signal from circuit instead of existing negative pulse as attached for hoppy above this will then switch on npn  transistor,mosfet or igbt to provide power for transistor for tesla coil.
In other words in theory if all goes well the tesla coil will fire up only at the peak of the 27khz since this is orginated  from yoke driver stage.The end result may look like there is high hv peak at the peak of sine-wave.Photo attached.

I hope this works later else we are all will be stuck at the nanopulser stage which would render the assemble device as incomplete/unsolved/failure at the moment until it is sorted out.

In the meantime i do recommend those with electronics background to find out another possible way for the nanosecond pulse generator.

It looks Ruslan version the unboxed version video which i have link less than 24hours ago does have 2 outer coil over the receiver portion/multilayer coil.

1)The short tesla coil base on that video is indeed running on it's on osc frequency around 1.7Mhz...1.8Mhz.

2)The other outer coil  which cover the multilayer coil is the one which is providing the nanosecond pulse on the additional coil which is powered by 150volts..dc in order to get few KV pulse.
  Actually this is the 3rd solution which i needs to try out at the later stage which is related to nanopulser.

[magpwr]

I did not had much time during the weekend because of work.

I did connect the MOSFET's to the yoke, but i seem to have a serious snubber problem (kind of expected) as the MOSFET's are
oscillating, we have ringing and they are switching irregulary when connected to the primary of the yoke, see screenshot 1.

Yellow is gate MOSFET 1
purple is drain MOSFET 1

Blue is gate MOSFET 2
green is drain MOSFET 2

I have presently as snubbers a 9nF/3Kv ceramic capacitor in series with a 120KOhm resistor from each MOSFET drain to source (ground).

When replacing the connections to the yoke with 2x 22 Ohm resistors, the MOSFETs switch cleanly, but when attaching the primary,
the oscillations and ringing starts again, see  the video.

Guess i have to implement the whole snubber scheme as in the diagram, or are there any other suggestions?

Video here:  https://www.youtube.com/watch?v=H-dx05LE7sU&feature=youtu.be   

The snubber used in the Ruslan diagram looks like below, we have:

an extra 1N5407 or HER605 diode from source to drain (guess a good schottky would do),
a 2.2nF capacitor in series with a 7.5 Ohm resistor from source to drain with a 1n4007 diode across the resistor
a varistor across source drain, value???  (i have some of 140V, guess i can use those). 


Regards Itsu

hi itsu,

This is the alternative approach from Ruslan screen-shot related to the snubber which i previously mentioned it is around 2.2nf to 10nf around 1 or 2kv ceramic capacitor which is connected from source to drain.I have not tested this part as i am still working at the nanopulser stage.
There are IGBT which are design for avalanche or induction heater.

[Void]

My plan is to use positive signal from circuit instead of existing negative pulse as attached for hoppy above this will then switch on npn  transistor,mosfet or igbt to provide power for transistor for tesla coil.
In other words in theory if all goes well the tesla coil will fire up only at the peak of the 27khz since this is orginated  from yoke driver stage. The end result may look like there is high hv peak at the peak of sine-wave.Photo attached.
I hope this works later else we are all will be stuck at the nanopulser stage which would render the assemble device as incomplete/unsolved/failure at the moment until it is sorted out.
...

Hi Magpwr. Ok, now I get you. That does sound similar to what Akula was showing in his schematic.
I will be interested to hear how that works out. Ruslan does not seem to have any waveform sync
circuitry on his Kacher driver, from what he has shown anyway. He just seems to be using an ordinary Kacher driver
to drive his tesla coil. Maybe syncing is better, but it would appear that just the Kacher driver will still work,
based on Ruslan's schematic and recent device videos. I guess time will tell...
All the best...

[Void]

I have presently as snubbers a 9nF/3Kv ceramic capacitor in series with a 120KOhm resistor from each MOSFET drain to source (ground).
When replacing the connections to the yoke with 2x 22 Ohm resistors, the MOSFETs switch cleanly, but when attaching the primary,
the oscillations and ringing starts again, see  the video.
Guess i have to implement the whole snubber scheme as in the diagram, or are there any other suggestions?

Hi Itsu. I have never played around with snubber circuits, but a couple of the Akula schematics
showed either  2.2nF or 10nF in series with 7 ohms. If you have any 2W carbon resistors in the
range of 10 to 100 ohms, you could maybe try that to see if it makes an improvement or not.
All the best...