Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

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...

I changed from a 9nF in series with a 120KOhm resistor from each drain to source (obviously not working) to:

# a 2.2nF in series with a 10 Ohm resistor and a UF4007 diode parallel to this resistor (cathode to ground, so different from the Ruslan diagram)
# a IDH12SG60C schottky diode from each drain to ground (cathode to drain)
# a 140V varistor across each drain / source.

But the oscillations, ringing and irregular switching has not improved on.

So looking to other reasons why this snubber is not working properly.



Nick, i am not so far as to test with the kacher, and i am not convinced that more higher wattage bulbs will be better.

IMO, if this yoke is not going to be switched properly then no progress is possible.

Just to be complete, i did change in the nano-pulse part from 7400/7414 to 74HCT00/74HC14, this greatly improved the switching signals
so Magpwr was correct there, allthough it did work with the older ones.

Regards Itsu

[itsu]

On a positive note, despite the chaotic behaviour at the MOSFET's drain signal (did we ever see a scopeshot of Ruslan there??), the signal
on the L3 coil looks promising and is peaking around 27KHz in resonance (with the oscillations/ringing visible ontop), see screenshot:
(no kacher or nano-pulse active!)

Regards Itsu

[NickZ]

  Here is a video of my latest Mazilli/yoke core build. It's just the induction heater crt part of the Akula/Ruslan type circuit set up. The big air coils and Kacher crt will be added soon, but I wanted to show what just the yoke will do by itself.
It's running for now on a 12v, 10amp battery charger, which may be providing 10 amps (or less) drawn from the device.
NOTE: The output voltage and amperage at the bulbs can't be read accurately by my analog meter.
  This is to compare notes with what you guys are observing at this point.
https://www.youtube.com/watch?v=E_zPg6Ficqo
 

 

[Void]

I changed from a 9nF in series with a 120KOhm resistor from each drain to source (obviously not working) to:
# a 2.2nF in series with a 10 Ohm resistor and a UF4007 diode parallel to this resistor (cathode to ground, so different from the Ruslan diagram)
# a IDH12SG60C schottky diode from each drain to ground (cathode to drain)
# a 140V varistor across each drain / source.
But the oscillations, ringing and irregular switching has not improved on.
So looking to other reasons why this snubber is not working properly.

Ok, that's interesting. Unfortunately I haven't built my TL494 driver circuit yet so I can't
compare notes on that. If you have a resistor around 200 ohms, you could maybe try
in series with the 9 nF from drain to source, with and without the diode across the resistor, and see if there is
any improvement at all. I haven't tried it, but I am thinking that may possibly make at least some improvement.
Has to do with where the cutoff frequency is. Not sure it will make a difference however.
All the best...

[Void]

On a positive note, despite the chaotic behaviour at the MOSFET's drain signal (did we ever see a scopeshot of Ruslan there??), the signal
on the L3 coil looks promising and is peaking around 27KHz in resonance (with the oscillations/ringing visible ontop), see screenshot:
(no kacher or nano-pulse active!)
Regards Itsu

Nice job.