Impressive results Steve!
Maibe I will see this coil in real time some day.
I will follow the QCW research. I am sure that the refining the technology, in time, will provide a circuitry more simple for hobbysts.
vasil
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>
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On Sun, 11/16/14, Steve Ward <steve.ward@xxxxxxxxx> wrote:
Subject: [TCML] "Fat Coil" QCW Double Resonant SSTC
To: "Tesla list" <tesla@xxxxxxxxxx>
Date: Sunday, November 16, 2014, 6:03 AM
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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