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Re: [TCML] Rotory STATIC Gap
Excellent interpretation of the gap!
You bring up an interesting point: If the stationary electrodes were on
opposite sides, would it basically arc across the rim of the disc? It
could certainly do that if the creepage distance from one stationary to
the other was within arc distance. But that's easily prevented. Imagine
if he used a 2.5" electrode in length with a 1/2" disc width. He would
end up with 1" of electrode on each side. Once you add in the 2" of
electrode, the distance around the disc, plus the minor distance of the
gap spacing, your far better off at not having a problem (assuming the
same cap, voltage, tranny, etc..).
I know Scot is now building a new coil and all of this is really moot at
this point, but if his retired coil was still "active", then I think he
would be much better off with the stationary's on opposite sides (mainly
due to the high voltages he uses). It would allow more flexibility with
voltage and still able to maintain a nice tight gap distance. The fact
is, the up and over (5/8" up, 1/2" across, and down 5/8") all adds up
(1.75" just in disc numbers and probably near 4" overall). Makes for a
very long distance for overly high voltages. The main issue is distance
from the motor case itself, but that can be dealt with regardless of
rotor diameter (bigger is of course better).
David Rieben wrote:
Scot is also proposing placement of the conductive ring that
the flying electrodes on the opposite side of the rotary disc from the
tionary electrodes, as opposed to the same side in his currcent setup,
seperate the concustive ring of the disc from the stationary
electrodes by at least
the thickness of the rotary disc itself. However, I would think that
if the primary
circuit voltage is jumping the 2.2" clearance at 75% on the variac
knob, it would
probably just jump the extra 1/2" around the edge of the disc once the
is turned on up to 90% or more.
Wow, Scot, I didn't know you had this much voltage rise in your
I'd have to agree with Gary here in that I'm surprised that your coil
ly for 9 years without a breakdown running in this fashion.
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