My s1r9a9m9 replication!

[capacitor70]

Could you please clarify which ones do you use?
Have you discarded other similar rated diodes or any similar could do?

I tried my circuit with  6A10 or 6A4 diodes both diodes work well, when you use 6A10 you need little less number of diodes...

diodes gets very very hot after few trials, it melts solder joints, during test on bike engine


Hint for diode less plasma system using coil....

[Super God]

Also, that guy's mpd thruster ignition circuit looked like a good candidate.  Need a high frequency power supply though.

[atlasman]

Cap 70,
Im about to go hook this thing up on my tecumpsi engine and wanted to clarify real quick a few key questions.

#1, the light bulb you have in your circuit, it is wired straight into the positive side of the AC 230 between the inverter and the bridge rectifier,   positive in and positive out, so it serves as something like a fuse, correct??

#2, what is the purpose of the little circuit with the TIP122 and pulse pick up coil on the negative side of the coil, then going to the head or ground side of the spark plug?  Is this necissary, what exactly does it do?

#3, this may be a dumb question, but with all you circuit electronics guru's reading this, maybe there someone who can answer, instead of having (12) 6A10 in a row, is there not a company that builds a much larger diode that would replace these 12 and also not get hot enough to melt the solder??

I just remembered, on the coil that is on the tecumpsi engine, it only has one wire exiting it, and it is a ground wire, the flywheel with the magnet on it turns and when it passes the coil it makes a spark and then exits the spark plug wire into the spark plug.  There is no positive to hook to a 12 volt supply like an auto coil.  What do i do with this setup??

thanks
atlasman

[rfsimoes]

I'm sad 
Wile continuing with the tests my 330uf 250V cap shorted.
I'm wondering why?
I using the same circuit as capacitor70.
The power supply from my UPS is delivering 170V and the bulb is a 75Wat.

Should I realy use a 400V cap? Another bulb in series?

[Shanti]

diodes gets very very hot after few trials, it melts solder joints, during test on bike engine

As I already said. This melting of the diodes is in my opinion an inherent problem of the diode approach for a plasma arc system. Because as soon as the plasma has established, all the voltage will drop across the diodes, which also means that almost all the lv power will be dissipated in the diodes and not the plasma...
I really think that the basic principle of the s1r scheme of using a coil instead of diodes could be the solution...
And there you found a really interesting thing with this plasma cutter circuit. Is there also a webpage about this, for in the vid you can't really see any details of the circuit...

Wile continuing with the tests my 330uf 250V cap shorted.

What do you mean by: "My cap got shorted"?
Sure it should get shorted for every firing...