Dear Steve,
I am lost for words.
Is there anyway this QCW stuff can be applied to spark gap or VTTC?
Very impressive results.
-Wil
On 16/11/2014 11:43 AM, "Steve Ward" <steve.ward@xxxxxxxxx> wrote:
> Hey Guys,
>
> I've been playing with larger arrays of fast-switching IGBTs for growing
> huge arcs from "tiny" coils. The idea is that hotter plasmas can be
> achieved at lower voltages by upping the frequency. At ~350Khz and above,
> its noted that the plasma tends to grow in straight segments which helps it
> reach further still... A dramatic demonstration of this effect is shown
> here with an 8" long coil with just 165 turns of wire producing maybe
> 100kVAC at 300khz is jumping 11 feet to the shop ceiling.
>
> https://www.flickr.com/photos/kickermagnet/15705193211/in/photostream/
>
> More pics at:
>
>
> http://forcijo.smugmug.com/Events/Teslathons/Philthon-2014/45663076_MtFqHw#!i=3689589842&k=M8Crsgs
>
> For those into the specs on components and such, I'll link my 4HV.org post
> from earlier today:
>
> http://4hv.org/e107_plugins/forum/forum_viewtopic.php?167363
>
> This coil is waiting for a 40kW power supply before it can sustain the 10+
> foot performance at high duty cycle. For now its limited to bursts at any
> power level over 15kW (which can only produce about a 5-6 foot discharge at
> 50% "on time" or about 25% duty cycle considering its a triangular
> modulation signal). Maximum peak power so far is 190kW. The maximum i'd
> bet my power electronics can handle is 260kW peak, so i think 13-14 foot
> sparks may be possible from my 8" tall winding... i'll set it up with more
> space next time and see :-).
>
> Steve
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