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.
Banned on 1/22/2011 for repeated rule violations after multiple warnings. Registered Member #3299
Joined: Sat Oct 09 2010, 08:11PM
Location: Bantown, USA
Posts: 220
why don't you build one, take a chip like the tl494 and osculate it around 100khz, the interrupt that with a 555. thats about as simple as it gets! but you are probably gonna have issues with the igbt getting slammed into the peak alas and the transistors will explode, not sure if that will happen but just a theory
Registered Member #2628
Joined: Fri Jan 15 2010, 12:23AM
Location:
Posts: 627
ubuntupokemoninc wrote ...
why don't you build one, take a chip like the tl494 and osculate it around 100khz, the interrupt that with a 555. thats about as simple as it gets! but you are probably gonna have issues with the igbt getting slammed into the peak alas and the transistors will explode, not sure if that will happen but just a theory
That might work for a small SSTC, although you will have to mess around alot to get any good results..
But DRSSTC, forget it. you better use some form of feedback, and a way to sync the interrupt with your drive input, since DRSSTC relies on soft switching. hard switching several hundred amps is usually very harsh on the IGBT. (so yes. boom)
also, Im not sure, but I doubt you can synchronize the oscillator and the interrupter just using a TL494 and a 555 (I could be wrong on that). such a circuit will require additional parts such as a J/K flip flop (yet again for that soft switching). Steve has this concept on his site, but instead of an oscillator driving it, he uses feedback from the bridge via a current transformer. and a pair of schmitt triggers to make it into a usable logic input. (invert and have positive output, then the second to uninvert it).
Heres Steve's site. it has VERY valuable information on DRSSTC:
Here is one of his pages, Id read this first:
EDIT: almost forgot.. THIS SITE! there are many people here who have built DRSSTC and I think you will find a thread about it here and there. (check project/tesla coil section)
Registered Member #2838
Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333
Thanks, i am already familiar with Steves site unfortunately if you look near the bottom of the page.. He never finished it. And aside from a few parts being shipped I already have everything needed for a DR. What I am looking for is some other sites providing information.
Banned on 1/22/2011 for repeated rule violations after multiple warnings. Registered Member #3299
Joined: Sat Oct 09 2010, 08:11PM
Location: Bantown, USA
Posts: 220
yes steve used the jk flip flop, but what if you interrupted the power going to the tl494? that way when it would start to oscillate at 0V? I think the sg3525 could maybe be synced up with the 555? I hate making schematics!
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.
Looking for Good links/info for DRSSTC design
but you are probably gonna have issues with the igbt getting slammed into the peak alas and the transistors will explode, not sure if that will happen but just a theory 