Re: [TCML] high frequency wave propagation along secondary coils

[paul <tcml88@xxxxxxxxxxx>]

Steve Ward wrote:

> How much confidence do you have in those simulations?

Not a great deal, it extrapolates well beyond the model's domain
of qualification by measurements. It is quite a crude simulation
of a complete discharge from the topload, programmed to occur at
the peak of the top voltage to represent a worst-case scenario.

> It basically shows about 2/3 of the top voltage applied
> across the bottom 10% of the winding, which sure looks
> like a recipe for failure.

The transient should be readily visible in the base current
waveform.   With a suitable test rig this could be recorded
and the voltage gradient near the base reliably deduced from
the current waveform.

The model uses a limited number of frequency components,
in reality the transient could be even steeper, at the top
at least.   The intention was to demo one possible cause of
racing arcs and I often wonder how much HF energy is sent down
into the coil from smaller step changes in top volts resulting
from normal (to air) breakout.   HF components show up well
in base current waveforms and would be a good diagnostic -
unfortunately recordings are rare as hen's teeth.
--
Paul Nicholson
--
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla