I would like to see an explanation of the schematic diagram. Does this Tesla coil tune itself to the resonant frequency of the secondary coil, and can it be run without causing the sparks to jump off of the top load?
Yes it does tune itself. The current transformer at the bottom of the secondary coil feeds back the oscillations to a schmitt trigger (making the signal sharp). If enough power is fed then it is difficult to run it without the sparks jumping off but with large enough toroid (no break points) compared to power I guess it is possible (but why?). C is resonance matched so the MOSFET uses (near) zero voltage switching. 555 operates it in short bursts.
Well, I'm not entirely sure it was 20W either but it was unlikely over 100W since the fuse I was using was only 0,5A and the 200VDC was the max before the transistor got destroyed. Usually the power factor isn't close 1 either. I didn't try to measure it exactly though so I guess it could be closer to 100W in reality.
200VDC was made by half-wave rectifying and filtering 200Vmax AC supply and the fuse was in that chain so that's why the power factor might matter.
Theoretically arbitrarily long sparks are possible with arbitrarily low power as long as duty cycle is kept low enough but I guess 20W is a bit pushing it. So let's just say it's something below 100W.
Ok, thanks for the answer! i was quite intrigued with the low power! it´s a interesting circuit that of yours, i´m a "fan" of simple circuits and class E, i´ve never tried using base current as feedback, so definitively will try your idea. ;)
SSTC=Solid State Tesla Coil. Solid State meaning semiconductors. Tesla Coil is a kind of resonant transformer that creates high voltage in bursts of radio frequency energy. More details can be found from wikipedia for example.
Is a SSTC or DRSTCC?
80927269 5 months ago
@80927269 Class-E can't really be DRSSTC so just SSTC.
decod31 5 months ago
Comment removed
gilligan80 1 year ago
FLASH!!!! Gotta love dumping the line into a fuse through a MOSFET ; )
Excellent results for an IRF740 I'd say.
Pyrotrons 3 years ago
If you don't feel like winding 100 turns around a ferrite toroid you can cascade 2 1:10 ferrite toroids
teslacoolguy 3 years ago
Nice sparcs!
FesixGermany 3 years ago
I would like to see an explanation of the schematic diagram. Does this Tesla coil tune itself to the resonant frequency of the secondary coil, and can it be run without causing the sparks to jump off of the top load?
TheMaverickScientist 4 years ago
Yes it does tune itself. The current transformer at the bottom of the secondary coil feeds back the oscillations to a schmitt trigger (making the signal sharp). If enough power is fed then it is difficult to run it without the sparks jumping off but with large enough toroid (no break points) compared to power I guess it is possible (but why?). C is resonance matched so the MOSFET uses (near) zero voltage switching. 555 operates it in short bursts.
decod31 4 years ago
The reason I would want to eliminate the sparking would be to improve efficiency for wireless power transition. Thanks for the info.
TheMaverickScientist 4 years ago
Nice spark, but judging by it´s lenght, it´s probably not 20W of DC input power :S or at least it´s hard to belive it to me.
tesla242 4 years ago
Well, I'm not entirely sure it was 20W either but it was unlikely over 100W since the fuse I was using was only 0,5A and the 200VDC was the max before the transistor got destroyed. Usually the power factor isn't close 1 either. I didn't try to measure it exactly though so I guess it could be closer to 100W in reality.
decod31 4 years ago
200VDC was made by half-wave rectifying and filtering 200Vmax AC supply and the fuse was in that chain so that's why the power factor might matter.
Theoretically arbitrarily long sparks are possible with arbitrarily low power as long as duty cycle is kept low enough but I guess 20W is a bit pushing it. So let's just say it's something below 100W.
decod31 4 years ago
Ok, thanks for the answer! i was quite intrigued with the low power! it´s a interesting circuit that of yours, i´m a "fan" of simple circuits and class E, i´ve never tried using base current as feedback, so definitively will try your idea. ;)
tesla242 4 years ago
.....ok everyones talking all scientifically, whats going on and wat does sstc stad for and whats a tesla coil!?!?!? Someone please tell me!!!
retaro1 4 years ago
SSTC=Solid State Tesla Coil. Solid State meaning semiconductors. Tesla Coil is a kind of resonant transformer that creates high voltage in bursts of radio frequency energy. More details can be found from wikipedia for example.
decod31 4 years ago
oh thanks really appreciate it cause it looks fun
retaro1 4 years ago
Beautifully said. Seriously, this looks a good result for just 20W. O_o
Aeryk333 4 years ago
the video isnt form my e class sstc :P .
my E class runs with 40 watt input and i get just 5 cm output :(
L0MY 4 years ago
wow great WORK !!! i wish my E-class Sstc would make so long and powerful sparks ... xD
gave u got a shematic ?
L0MY 4 years ago
sry i meant *have* not gave :P
L0MY 4 years ago
Thanks. There is a schematic link in the description but I think it should be a bridge to work more reliably.
Your sstc works nicely too judging by your video.
decod31 4 years ago
This is good result just for one transistor.
jmartis2 4 years ago