From: "Terrell W. Fritz"
Date: Sun, 05 May 2002 17:50:53 -0600
Subject: Re: [TSSP] Secondary voltage stress factor
Hi Paul,
>Please can we have some captured traces of topvolts in a discharging
>TC so that I can test this part of the model?
>
>This is one of those situations that calls for an experimental test.
>Something like a solid state gap, modest bang voltage, earthed
>electrode brought up to the toroid for a low voltage discharge.
>Base current CT, and something to pickup the top volts. We can look
>at the size of the base current transient which occurs 1/4 cycle
>after the discharge to see if it's consistent with the model.
>
>One possibility is that the nature of the simulated discharge is
>unreal. The program simply removes the stored charge from the top-
>load in between two time steps of the model, ie within around 30nS.
>Thereafter the top voltage is no longer clamped to earth and is free
>to rise again - perhaps in the real coil the discharge can continue
>for much longer, clamping the topvolts down, and altering the
>characteristics of the transient.
I looked around and all the stuff I have is air streamers. I used to have a
few discharge graphs but they were pretty out of date since they were done so
long ago.
I can see terminal voltage to about 100MHz and currents to 20MHz. Is that good
enough? I note you had problems with the animations of the fequency response
was too low. I can see streamer currents, discharge currents, coil to terminl
currents and all that.
http://hot-streamer.com/temp/P5050020.jpg
I would probably have to disconnect the Sun computer and put it to sleep for
discharge tests like these. So maybe best to wait until sfaq is done. I can
try to get some wet lawn/dry lawn data for qvar in the mean time.
Think about exactly what voltages and currents you want to see. I would
probably use the small coil for this but with a fiber optic in/out current
sensing top terminal.
Boris asked:
>Does Terry has racing spark problems when runing his
>TC detuned near k=0.2?
The small coil system is an auto quench coil so it only has a coupling of
0.117. Too low for racing arcs.
http://hot-streamer.com/TeslaCoils/MyCoils/SmallCoil/SmallCoil.htm
Cheers,
Terry
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.