High Voltage Circuit (VIC)

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webmug,I am looking into that exact thing right now.Just rectifing HV then switching it.But the problem comes into play of finding a HV mosfet that can handle the 2kv or higher.
Don

Don, aren't you switching already the STEP-UP transformer in resonance with the PULSE frequency using a MOSFET (fixed gate-voltage Vmax @12V from PWM signal generator) with variable Voltage DC (0..30V) on the primary coil?
I'm measuring HV AC (Vpp) on the secondary coil.

Problem/solution:
Rectify this HV AC to HV POSITIVE UNIPOLAR VOLTAGE (4 HV diodes needed).

I assume GATE frequency/duty on the primary coil STEP-UP transformer (already in resonance due PULSE frequency) is used to (resonate) CHARGE the choke and WFC.

Result in GATING the HV POSITIVE UNIPOLAR VOLTAGE is to create a pulse train from the STEP-UP coil.

So you don't need to pulse HV with a MOSFET.

Update:
Signals from transformer. First thing I would like to see is signal Fig A)1) converted into Fig A)4) going into the CHOKE.

br,
Webmug

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Under "Electrodynamics"
Analog Circuit Simulator Applet
Demonstrates various electronic circuits.
http://www.falstad.com/mathphysics.html
http://www.ionizationx.com/index.php/topic,857.msg7864.html#msg7864

Run this Java program --> http://www.ionizationx.com/circuit/index.html <--

Import this code into the program and see how the capacitor reaction in the CHOKE looks like connected to WFC and the use of the BLOCKING DIODE.

====================Begin===================
$ 1 5.0E-6 6.01975421667673 52 5.0 50
T 384 128 480 128 0 0.2019 1.0 0.005562787066292237 0.005562787066947436
c 512 128 512 224 0 1.62E-10 -90.03223836134137
c 352 128 352 224 0 1.62E-10 -90.03223836100754
w 352 128 384 128 0
w 480 128 512 128 0
w 384 224 352 224 0
w 480 224 512 224 0
w 240 128 240 32 0
w 512 32 512 128 0
w 320 128 352 128 0
w 544 224 512 224 0
170 128 128 80 128 2 89940.0 90990.0 5.0 0.1
w 320 128 320 368 0
T 240 128 128 128 0 1.0 0.01 -4.2327252813834093E-16 -363.7470027251377
d 240 32 352 32 0
w 352 32 512 32 0
w 240 224 352 224 0
g 128 224 128 272 0
c 320 416 544 416 0 5.0E-8 -314.81269499291193
w 544 368 544 416 0
w 320 416 320 368 0
r 544 368 320 368 0 100000.0
w 480 224 480 160 0
w 384 224 384 160 0
w 240 160 240 224 0
w 128 208 128 160 0
w 128 224 128 208 0
r 544 224 544 336 0 0.1
w 544 336 544 368 0
o 18 64 0 99 1280.0 0.1 0 -1
=========================End======================

It's not my code or program!!! Try and fiddle with this program, especially the Frequency Sweep Generator frequency bandwidth to see voltage @ the WFC.

Remember it's only a simulator.

br
Webmug

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i'm pretty sure stevie also hosts this tool on this site

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webmug,I'm just looking to bypass the step up transformer all together.Just start with HV DC and switch it,and send that through the chokes to the cell.
But yes right now I'm pulsing the Meyer step up/choke coils now.But I'm just getting an AC swing to the cell.
And yes,your drawings are right on the money,exactly
Don

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The AC signal is coming from the back emf?  And the chokes are wired parallel what happens when they are wired anti-parallel?  Isn't that what Stan indicated?  I've tried the chokes both ways only difference I noticed is the coil buzzed in parallel configuration.  I haven't tried a step up transformer yet.  The time I did the pwm I was using started buzzing so I turned it off. 

Andy

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Update,

I want to show my new VIC coil that I made. Because I have no lathe, I made it on cardboard
Thanks to dynodon for the VIC specs.

If you want HV, do it this way!

Specs of the VIC coil:

Primary
2x110 wound 0,6mm

Secondary
No cavities yet
2x2255 wound 0,15mm

Choke
BIF1 2298 wound 0,15mm
BIF2 2298 wound 0.15mm
4cm 12 cavities

Input
12V DC 300mAmps

Output
Measure +1000 V over WFC FL lamp lit. No gas yet!

Also I'm building a adjustable plate cell, so I can match on the VIC choke.

br,
Webmug

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Hey guys,

I finished my adjustable plate cell.
I used two plates with dimensions of 40mm x 100mm stainless 316L. The gap is adjustable from 0,1mm to 10mm.

If my calculations are correct I must have a WFC cell capacitance of C=2,83nF with 1mm watergap.
My VIC internal choke has about 26,6mH inductance so resonance frequency must be f.res2=18,3kHz.

As aspected my VIC step-up transformer wouldn't resonate on the same frequency (f.res1) as (f.res2), so it never will 'ring' with my VIC internal choke resonance frequency (f.res2). So I have no High Voltage on this WFC cell resonant circuit to do tests on, must figure out how to get HV working.

I also used HV DIODE 20kV / 10mA, these also don't work in the LV circuit, YET!!!

Again, more tests to do...

@steve
I hope to try and test the LC circuit without a solid capacitor! Just choke and WFC.

br,
Webmug

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Sounds great, wegmug. If you cannot find resonance, you always can use an external cap and use the wfc as resistor.

Lego forever!