A Kapanadze generator replication - Febuary 2013

[zcsaba77]

But, as zcsaba77 pointed out, too high a voltage will fry your caps, it will also create arcing conditions in the coil itself and may burn your construction.

http://jnaudin.free.fr/dlenz/DLE01en.htm

Hi Tika (and All)

I watched Naudin's video, if I good saw input was higher when NOT was load. Am I correct? Some explain why?

If spark gap too big voltage raise (runaway)? Why not put higher voltage cap(s)? or better keep voltage lower?

[guruji]

hi guruji

if u left too far spark gaps catodes, cap(s) explode? this coil is air or ferrite cored? how u calc how much turns need forward and back?

Hi Zcsaba77 to tell you the truth I'm still wondering how I did the setup of the flickering lights cause I changed alot of setups.
But yes as I think you already know if a cap is charged beyond it's voltage it can explode especially when using a ZVS.
In one of the posts King said to crush ferrites and do a form you need; did you do this? Do you use special type of glue?
Grumage can you please post your flyback schematic?
Thanks

[Grumage]

Hi Zcsaba77 to tell you the truth I'm still wondering how I did the setup of the flickering lights cause I changed alot of setups.
But yes as I think you already know if a cap is charged beyond it's voltage it can explode especially when using a ZVS.
In one of the posts King said to crush ferrites and do a form you need; did you do this? Do you use special type of glue?
Grumage can you please post your flyback schematic?
Thanks

Hi guruji,

I'm sorry I don't have a schematic. I was using a standard B/W TV unit as is. This runs at a frequency of just over 16 Khz (raster scan for 625 lines) But as quoted yesterday, I felt the HT spark did not have enough energy to do the job. A colour TV flyback has a much higher output in the order of 25 Kv but still runs at 16 Khz. My own feeling is that the Flyback oscillator frequency should match the resonant frequency of our Primary L C circuit. This would then minimise the primary's energy requirement.

Quote, Zcsaba77. I don't think we need ridiculously high voltages, I proved that yesterday. Both input sources to my primary winding were aproximately 8Kv. But the bigger windings of the 50 Hz ignition transformer were providing a better spark. Only problem was the frequency.

Cheers Grum.

[tika]

Hi Tika (and All)

I watched Naudin's video, if I good saw input was higher when NOT was load. Am I correct? Some explain why?

Naudin's experiment was part of a series of experiments on the newly discovered "Delayed Lenz Effect".  The lowering of input current under load _is_ that effect.

If spark gap too big voltage raise (runaway)? Why not put higher voltage cap(s)?

There is also the insulation between coil loops to take into account, and spacing between cap electrodes.  3 inch is 76 mm, to bridge that you need about 85kV.  You will need to build your own parts rated at 100kV or more, potted in epoxy or (and?) swimming in oil.  You will also need higher current, and power to drive such a supply.  I'm not saying not to do it.  It just doesn't seem practical unless you want to produce over 100kW, which implies bigger, and more expensive, everything. 

or better keep voltage lower?

m:o)

[tika]

Hi guruji,

I'm sorry I don't have a schematic. I was using a standard B/W TV unit as is. This runs at a frequency of just over 16 Khz (raster scan for 625 lines) But as quoted yesterday, I felt the HT spark did not have enough energy to do the job. A colour TV flyback has a much higher output in the order of 25 Kv but still runs at 16 Khz. My own feeling is that the Flyback oscillator frequency should match the resonant frequency of our Primary L C circuit. This would then minimise the primary's energy requirement.

What voltage do you use to power the flyback?  These B/W transformers were usually designed for a 150VDC supply.  Did you coil you own primary and feedback coils as is often done ? 

For the frequency, I think you are right, the primary resonant frequency should match, or be a multiple of the flyback frequency for optimal operation.

As for me, I do not have 5W resistors, but tons of caps, so I will make a driver based on the SR193 schematics. 

m:o)