Projects by members > warj1990
Different kind of VIC Circuit
Steve:
Looking great! :)
warj1990:
Well I have some test results, not looking good.
Production remained "a bubble here and there" nothing great.
I replaced the secondary cap with 2 nf to generate high voltage on across the secondary.
I "shorted out" one of the cells, disconnected from the tubes and tied the wires together. Thinking there was cross conduction in the cell.
Total input was 2 amps (I think around 60 volts - did not check that).
I have some photos I will attempt to explain in order:
1: Bubble production very poor. Look at the right tube only one connected.
2: Frequency of circuit: 38.16 khz
3: 2 meters shown: Left voltage at secondary capacitor, Right voltage at primary tank capacitor.
4: 2 meters shown: Left max voltage of meter secondary capacitor, Right voltage at primary tank capacitor.
5: 2 meters shown: Left input current for driver, Right Voltage at primary tank capacitor (note same as photo 4)
I also measured the voltage at the cell terminals, 2 volts DC. With salt added 0.8 volts DC.
Production was slightly higher with salt added, again not much for the power going into the system.
I am open to any ideas at this point - planning on a smaller secondary winding ratio and looking over Meyers info again.
warj1990:
I wanted to add, my limits on the driver circuit are as follows:
200 volts across the capacitor, due to Gate Drain junction on Mosfets.
4 amps total input into the driver, bridge rectifier limit.
I noticed with 2 amps the circuit is getting hot after a moments run. So the run times were short.
I had another idea. The primary has 40 turns and a tank cap of 0.1uf I can put 40 turns on the secondary and a 0.1 uf cap.
This will resonate the primary and secondary - since conduction started in the cell at 2 volts and my driving voltage is well above that.
Stay tuned...
warj1990:
Same setup as above only 40 turns secondary.
Primary drew 14 amps at 15 volts, so I shut it off.
Primary drew 7.6 amps at 10 volts, so I did some short runs, under 20 seconds.
primary and secondary cap both showed about 28 volts each.
Secondary current into the fuel cell was 0.048.
Frequency was about 1.1khz.
No visible gas production.
I am missing something in the parallel tank circuit - should be massive amp circulation in the tank, and little amp consumption from the source.
??? Well I didn't blow anything up yet so time to call it a night.
I will try the 640 turn secondary tomorrow with 7 amp draw in the primary. Also try baking soda before switching back the secondary.
warj1990:
New day new idea.
I have the primary tank as 40 turns and 0.1uf cap.
I have the secondary tank as 40 turns and 0.1uf cap.
I removed the water system completely to test the resonance of the system and it works. Current draw is 0.13 amps at 10 volts, increases as the voltage goes up.
On turning off the variac it continues to resonate for about 1/2 second.
So for this system to work with the fuel cell I need the most conductive water possible.
How much KOH (or better electrolyte) can I use?
I need maximum conductivity in the water for this system to work, long electrodes, small spacing, lots of electrolyte.
Photos:
1, 3 meters. Left shows input current to driver (o.13 amps), Middle shows current on secondary (0.45 amps), Right shows freq. 13.71 khz
2, Shows input voltage of Variac 10 volts.
3, Shows X former, bottom trace of driver circuit.
4, Shows higher current draw and output, variac turned up - same as photo 1.
This shows about 3x output current vs input current, seems to match the PIE voltage increase driving the system.
I think fine tuning the inductance will drive the primary current lower and secondary higher.
Exciting morning for me ;D
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