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Re: [TCML] nnanred1's coupling values
Reed's mathematical analysis is "right on target", however he is referring
to Tesla transformer accelerators, and all Tesla transformer accelerators
operate in a vacuum or SF6/nitrogen gas blend. They do not operate in open
air.
Sandia Labs high performance resonance transformer operated at k = 0.6 and
hits 3 million Volts, but again was heavily insulated in a tank. Marco
Denacoli's excellent doctorial paper covers this in great detail and offers
several practical examples of what does work in the real world with real
coils. All the math is present and also several photos of his test system
in operation.
You can't run a coil with this coeff of coupling in open air as breakdown
occurs I've done a lot of experiments along these lines and the best values
for class open air coils with spark gap switches seems to be in the range of
0.12 to 0.14. Tighter than this and the freq starts splitting so far that
racing sparks occur as the coil starts hitting two high potential points
along the sec and the dreaded "standing waves" or beat freq waves begin to
occur between these two freqs.
Solid state DRSSTC coils work great at 0.17 to 0.18. They will work up to
0.2 but at this value you are asking for problems.
Dr. Resonance
Resonance Research Corp.
www.resonanceresearch.com
----- Original Message -----
From: "Lau, Gary" <Gary.Lau@xxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Saturday, December 08, 2007 2:45 PM
Subject: [TCML] nnanred1's coupling values
Hello no-name,
May I assume that a "Tesla transformer accelerator" is the same thing as a
Tesla coil? I've not encountered that term in the many years that I've
studied Tesla coils.
It's interesting that of all the folks on this List who have spent years
researching, building, analyzing, tuning, and tweaking Tesla coils, that we
have all fallen into the rut of using inefficient coupling values, typically
below 0.18. Please share with us what levels of performance you see from
your coil that uses the more efficient high value (k= 0.6, 0.54, 0.385)
coupling. Better still would be documentation of such a coil on a web site.
You have actually built such a coil, right? Otherwise such a theory isn't
worth the paper it's printed on. Personally, I don't "by" it.
BTW, since you're not replying to an existing thread, it would be helpful if
you could change the subject line to reflect the actual subject.
Regards, Gary Lau
MA, USA
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of nnanred1@xxxxxxxxxxx
Sent: Saturday, December 08, 2007 3:35 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Re: Spark gap Resistance
hi,
the greatest efficiency occurs when the primary and secondary circuits
resonate at
the same frequency when they are decoupled. k=0. then you couple the
circuits so
that k= 0.6, 0.54, 0.385, 0.125. when you do this the 2 coexisting waves
in the
coupled system have a frequency ratio of 2. this causes an alignment of
the 2
voltage waves and obtains a maximum in voltage or pulse power.
get the paper by j. r. reed, "Greater voltage gain for Tesla transformer
accelerators"
in october 1988 issue of Review of Scientific Instruments and there is a
test
procedure to set the coef. of coupling so simple a child can do it.
The paper is written to disclose the grand max in performance for the
transformer
with a coupling of about 0.54. The national labs use a coupling of 0.6;
but dont let
any of that worry you. the k setting procedure is good for any coupling;
like k=0.12.
people read this paper and think it is for the higher couplings. it can
install any
coupling if u have an o-scope or electron voltmeter and a signal generator
to tickle
the coupled circuit with.
it really is simple. and these operating points will produce the best
transformers.
what holds it back is reading comprehension.
by now,
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