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Slight error in the following: I reference R1 but that should be, of
course, R3.
KCH
-------- Forwarded Message --------
Subject: Re: Question for solid-staters
Date: Fri, 24 Apr 2015 15:48:41 -0700
From: Ken Herrick <kchdlh@xxxxxxxxx>
To: TCML <tesla@xxxxxxxxxx>
More accurately, Re: Question for single-resonance solid-staters--of
which there seem to be mighty few still around.
Having been involved in deciding on series or parallel single-resonance
with synchronized primaries (from secondary feedback), I've received
good advice recently but have thought to make a simple simulation to
further pursue it. Ref. the following link.
Two anti-phase drives of 300V each drive 2 identical primary coils. The
transformer is a simulation of a Tesla coil (with the secondary
inductance of my actual coil) and its top-load. The secondary Fr is
what's calculated for those L & C values--absent any primary influence.
In the chart, I started out at primary:primary k = 1 and
primary/primary:secondary k = 0.8. Ran a 1ms simulation, measured the
maximum, entered that into the chart, etc. Finding 35KV as the maximum
in that column, I proceeded leftward then upward similarly, reaching the
sweet spot of the one k = 0.9 and the other, 0.4. I then set R1 to
100K, just the once, and ran that again. That seemed to show that
paralleling primaries closely together and setting a rather loose
coupling to the secondary yields the best response (and the easiest way
to do it).
I just note I made an error on the chart, substituting +144K for *144K
in the notation. Won't bother changing it...
This seems to further tell me that I don't have to series the primaries
to create 1 effective coil but rather can configure them just physically
& electrically in parallel.
