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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Platinum wrote ...
Yes, and I'm also using the primary of flyback...
So any problem with the circuit?
you should be getting hv out of both then, the iggy and flyback.
your effectivley dividing your 45v and whatever Amps between two transformers, with vastly different frequency behaviours. i trying to think.... what freq are you operating the 555 at?
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Platinum wrote ...
No, the frequency is very high for the ignition coil.
Is there anything in the circuit that needs taking out, mind you the circuit is a awesome plasma speaker on 45volts.
the iggy wont respond well above 6khz, but the flyback wont do well until above 10kHz or more, the iron of the iggy and ferrite of the flyback are not series compatible. thats your problem.
i think you should get a 10 or 20 ohm power resistor, then change the freq and on-time.
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hm, the output looks great to me for such a crappy circuit, especialy if you've put an ignition coil or whatever in series with flyback primary?
You can limit the voltage overshoot by placing a capacitor in parallel with the mosfet, which will recycle the stored energy back to the supply. The flyback will still saturate when drawing arcs though and very hot or blown mosfets would be no surprise.
And actually, I've shown you a schematic based on UC3842 some time ago that solved both problems, but you decided to ignore it.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Platinum wrote ...
I don't have the parts to build that, but I'm going to try to build a halfbridge soon...
A halfbridge is way more complicated than any of the circuits you have so far built, and i dont think you have learned enough yet to move on to a bridge arrangment of any kind yet. if you cant get the parts for a UC type ic circuit, i seriously doubt youll get even some of the parts needed for a half bridge.
you still have much to learn about the single switches before you will be able to move on.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Just.. learn how it works inside out and dont kill yourself with it, a halfbridge can be more dangerous then a ZVS if used in the 'correct' way, i was really worried when you were saying how youve been getting electricuted by the ZVS i sold you... just stay alive
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Best arc I can get with 555
