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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Antonio wrote ...
Or better, add a circuit to control the average arc current.
Probably not exactly on topic, but I'm trying to do this for about half a year but haven't succeeded. The driver is a flyback converter (single switch). The arc whistles (unstable feedback) or it works OK until I draw the arc too far when it starts screeching and sometimes kills my transistor. I have tried many circuits (simple lowpass+op-amp, "integrating" amplifier) and controllers (sg3525, tl494) but no luck. If this topis is of interest, we can start a new thread.
Well guys, I don't know if thats it. Because when I leave the flyback out (still had the wire there, just no flyback), I get high pitched noise from some component (replaced all main components piece and still get the noise) What would produce high pitches? Capacitors don't right?
I can't locate teh noise cause everything is close together.
I can buy another flyback and see if that helps, but I don't think its the only issue.......
Do you think that my second schematic, the 30V, is regulated enough with the capacitor? I don't have the Q5 there:
The gate drive transformer is the main suspect of the noise. Top part of what?
The mosfet???
can you point to which one, or just test em all???
I was talking about this one:
That's how I am getting my voltage supply.. I don't to use batteries.
My hypothesis: I am getting the 30V (a little higher, but ok) in one line A-OK but the other line, something is wrong with a component and running slow??? Therefore, its not keeping up with the oscillations. In the end I get a slightly weaker flyback arc.
Originally when it failed I was flashes of arcs, appearing like lightning... dialing R3 all teh way to one side, I guess it was less dependent on the other half, and compensated?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
you should not hear any high pitched sound. If you hear it, increase the frequency until it disappears, in the case of the half-bridge, you should increase it even more.
you should not hear any high pitched sound. If you hear it, increase the frequency until it disappears, in the case of the half-bridge, you should increase it even more.
oh... i did not have my flyback hooked up just wire (to troubleshoot)
The noise is the rectifier, but i am getting 30V s i dunno why its whining. o_O
However, turning the frequency all the way up and messin with the other dial i still get small arcs and crappy noise , music hard to hear.
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Flyback issues... I THINK
