If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
It seems to work fine for conventional, SISG, and DRSSTC coils now. I included examples of all of them. The streamer load model is in the C file (plain text), but the meat looks like this:
Pretty simple now. I got the simulations and all done and added now so the constants are accurate. The program also has goal type 3 now to search for the best streamer length. Dwell time can also be used for conventional coil quench time too. The arcs to ground seem to work well now and match the scope. So, finally, the program seems to be doing its master's bidding
The default input file in the ZIP is for Dan's new DRSSTC-III. I was not sure for the toroid diameter and maybe a few of the inputs, but they are probably close. The program gave this:
================ ScanTesla V-7.62 June 4, 2006 Terry Fritz Goal = 4.180500e+001 Maximum Leader Length Model Number = 940 Goal Number = 125 Cprimary = 1.100000e-007 Lprimary = 9.100000e-006 Rprimary = 1.000000e-001 Coupling = 0.182500 Csecondary = 2.099000e-011 Lsecondary = 4.387000e-002 Rsecondary = 3.850000e+002 Cload = 6.300833e-012 Rload = 2.200000e+005 BPS = 120.000000 Dwell (T1) Time = 6.800000e-005 Ilprimay Maximum = 560.892753 ICprimary RMS (Arms) = 22.307666 ILsecondary RMS (Arms) = 0.391537 VCprimary Maximum = -5120.878882 VCsecondary Maximum = -416110.197722 Coil Power = 328.820961 Primary Bang Energy = 2.740175 Load Power = 220.028924 Load Bang Energy = 1.833574 Leader Length (in) = 41.804996 Streamer Primary F0 = 159075.425254 Secondary F0 = 165855.582964 Load Energy Rise Time (uSec) = 50.600000
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Hi Terry,
Great stuff! I have some data that I captured from my own DRSSTC here: There is a DSO capture of the primary current during a ground strike. Is there any way we can get ScanTesla to model this and see how the simulated primary current matches up?
As regards probe bandwidth for capturing ground strikes: If the arc channel had very low resistance (which I believe it does) it would resonate like a metal antenna excited by a spark gap, much as in Hertz's original experiment. So, I imagine the ground current waveform would be a damped ringing whose frequency was such that the streamer was something like a quarter or a half wave long. That works out in the 50-100MHz range for the sizes of coils that most of us play with. The impedance of the connection to the ground target would affect this however.
Does your mutual inductance loop pick up i(t), or di/dt?
Great stuff! I have some data that I captured from my own DRSSTC here: There is a DSO capture of the primary current during a ground strike. Is there any way we can get ScanTesla to model this and see how the simulated primary current matches up?
The parameters I found for this situation did not match up right. I asked Steve if he still has the data on the coil measured. ScanTesla "should" be able to "do it" with the right input. If not, I will "fix it"
Does your mutual inductance loop pick up i(t), or di/dt?
That is a very good question??? I was just looking for "speed" data... All that "it" response data is unknown... I really have no idea other than the spark is "darn fast"!!!! and runs into the low thousands of amsps!!
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Steve Conner DRSSTC Model question
