High Voltage Circuit (VIC)

[Hidden]

A little update,

I have tested resonance on my STEP-UP transformer coil, here are a few scope shots...
As you can see, my PULSE signal is not perfect and you see a little ripple on the secondary coil output signal.

One coil 2x90 wnd primary 22AWG / 2x1000 secondary 26AWG center tap no s/s core used, when used more amps are drawn.

Basic configuration:
Primary 2x90 series connected (180wnd) 22AWG
Secondary 1x1000 connected 26AWG

Upp in=15V DC PULSE
du=~55%
I in=0.3-0.44Amps
resonance frequency = ~126kHz
Upp out=~650-690V

This is just a little test to see what happens when resonance occurs, guess most people here already have seen it.

Can someone explain the DIODE used as a frequency doubler?
And what could happen when this signal is going into the bifilar choke?

br,
Webmug

[Hidden]

Ok,

I connected a bifilar choke to secondary winding. In-between a diode.
When STEP-UP coil is in resonance, AC signal is generated, see above.

First I had no core in the coils, AC signal is generated on resonance frequency... So now inserted a few SS rods into the STEP-UP transformer. Generates a AC signal, different resonance frequency.

Then connected a separated (other core) bifilar choke with a few SS rods (need more, but takes time to cut). PULSE duty-cycle +50% GATE duty-cycle +100%... AC signal at lower resonance frequency!

Now adjusting the GATE duty-cycle +30% low frequency...as you can see, there is little step-charge and a big current generated in the OFF GATE PULSE!!! My current is 0..30mA @15V. FL lamp is ON.

Don't know at this moment why there is still AC signal on the WFC, assuming there must be DC step-charge???
I think that my choke has low resistance. Need to make one with smaller wire and more windings.

Nice to see this effect.

Update:
Add picture of my choke L1-L2 bifilar, I made two of them. Top one was connected.

Br,
Webmug

[Hidden]

webmug,now your seeing what I'm seeing.An AC sine wave when at resonance.
I am generating the same kind of signal,but at 4kv peak to peak.
Don

[Hidden]

that would be the right waveform if it was rectified? (light blue) is the diode not keeping it DC?

i understand the voltage is not acting as expected... but I'm wondering how to fix it?

I noticed with the 3 phase rotary vic, your voltage will have an overlap, so this will (should) inherently prevent it from swinging past ground as the next phase caries it over

[Hidden]

Ok,

I connected a bifilar choke to secondary winding. In-between a diode.
When STEP-UP coil is in resonance, AC signal is generated, see above.

First I had no core in the coils, AC signal is generated on resonance frequency... So now inserted a few SS rods into the STEP-UP transformer. Generates a AC signal, different resonance frequency.

Then connected a separated (other core) bifilar choke with a few SS rods (need more, but takes time to cut). PULSE duty-cycle +50% GATE duty-cycle +100%... AC signal at lower resonance frequency!

Now adjusting the GATE duty-cycle +30% low frequency...as you can see, there is little step-charge and a big current generated in the OFF GATE PULSE!!! My current is 0.30mA @15V. FL lamp is ON.

Don't know at this moment why there is still AC signal on the WFC, assuming there must be DC step-charge???
I think that my choke has low resistance. Need to make one with smaller wire and more windings.

Nice to see this effect.

Br,
Webmug

Thanks for sharing these nice scope shots, Webmug!

Steve