Author Topic: High Voltage Circuit (VIC)  (Read 17725 times)

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Re: High Voltage Circuit
« Reply #8 on: November 09, 2009, 18:47:39 pm »
My new step-up transformer 2x90 wnd primary 22AWG / 2x1000 secondary 26AWG center tap.
Choke bifilar (22AWG 850wnd and 26AWG 850wnd)
50 s/s rods into the two coils as core.

I got HF over the WFC cell and little bubbles are created, nothing serious! ;)

When I connect the FL lamp between +WFC and -WFC it does not glow, when I put my finger in the middle of the FL it does glow from finger to -WFC and +WFC connections. When I let go it stops glowing. When I only connect the FL to the +WFC and put my finger on it in the middle it glows from +WFC to my finger opposite with the -WFC connection.

Looks like i have NEG and POS voltage over the FL lamp.

It is obvious that my chokes are not restricting current at the moment. That's what I have to figure out now and get resonance in the choke first. When I know the resonance frequency and see it on a scope I make a step-up transformer with the same resonance frequency and fiddle with the PWM signals (duties, gate, pulse) and input amplitude voltage and get the total coils in resonance.
When I have that figured out, I have to match the impedance of the total (WFC connected) system. I think then the 430F s/s wire is needed, to match the WFC capacitance to get WFC and choke in resonance. I hope the gap size of 1mm  (1.524-0.254mm) is small enough to match on. A pickup coil can also be used, to see if the system is in resonance, when not frequencies must be altered.

Basic first thing I do is fiddle with a choke right now, then we go a little step further. ;D

br,
Webmug
« Last Edit: November 09, 2009, 19:17:26 pm by webmug »

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Re: High Voltage Circuit
« Reply #9 on: November 09, 2009, 19:37:56 pm »
I'd suggest a smaller simpler VIC to play with first, stan talks about more than 1000 volts with only 100 turns on the chokes, it's not a step up ratio that makes the voltage, it's inductive reactance

You got 90:1000, is 1:11, so at 12 volts you get 133 volts, then into your huge chokes, but if your chokes are not neat the the wire wont lie exactly next to each other and be the same length, would be must easier to play with 100 turns than 850!!

You could try
P: 200 turns
S: 600 turns
Choke 1: 100 turns
Choke 2: 100 turns

These are the numbers from the fuel gas patent

sounds fun though :)

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Re: High Voltage Circuit
« Reply #10 on: November 18, 2009, 22:07:32 pm »
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? ;D
And what could happen when this signal is going into the bifilar choke?

br,
Webmug

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Re: High Voltage Circuit (VIC)
« Reply #11 on: November 23, 2009, 21:14:11 pm »
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
« Last Edit: November 24, 2009, 13:31:17 pm by webmug »

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Re: High Voltage Circuit (VIC)
« Reply #12 on: November 23, 2009, 22:41:56 pm »
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

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Re: High Voltage Circuit (VIC)
« Reply #13 on: November 23, 2009, 23:06:06 pm »
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

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Re: High Voltage Circuit (VIC)
« Reply #14 on: November 23, 2009, 23:08:46 pm »
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

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Re: High Voltage Circuit (VIC)
« Reply #15 on: November 24, 2009, 01:49:07 am »
webmug,thats where I'm at now.Wondering if the diode isn't stopping the reverse voltage,and making ac.I'm thinking that the diode isn't closing for the reverse voltage because the current is too low.Diodes only work in stopping current flow,not voltage.Do we have enough current flow to cause the diode to block?I'm looking into that now.May need a different type/size diode for low current high voltage.
Don