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Re: Coupling stress plot
This proves nothing, but I have got a snapshot of my coil with racing arcs
going
from about 30% to 70% of its height. On the other hand, it is very difficult to
prove that the secondary isolating coating was uniform.
I think a dynamic measurement of the electric field at different secondary coil
height would be the best solution to prove your theory.
Cheers
Tesla List <tesla-at-pupman-dot-com> on 09.05.99 06:02:55
To: tesla-at-pupman-dot-com
cc: (bcc: Marco Denicolai/MARTIS)
Subject: Coupling stress plot
Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
Hi All,
I have posted a stress plot and excel97 file at:
www.peakpeak-dot-com/~terryf/tesla/misc/astress.gif
www.peakpeak-dot-com/~terryf/tesla/misc/astress.xls
I am not sure if this really means anything but...
I calculated the coupling between my primary and 1/2 inch sections along
the length of my secondary. This basically is the coupling vs. distance
along my coil. I then multiplied this by a sine function that would tend
to indicate the voltage distribution along the coil. There is a sharp peak
in the graph 19% up the coils length. Perhaps this would indicate where
the most voltage stress would occur and where racing arcs would be most
likely to start. I would suspect that the arcs would start around 15
percent and up to 50% up the length of the coil from this chart.
Take all this with a BIG grain of salt though...
Terry