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.
Registered Member #588
Joined: Sat Mar 17 2007, 11:06AM
Location: UK
Posts: 93
Here:
Also Ive got another question here about steve's mini SSTC- 74CH14 inverter chips, since I cant buy them would any NOT gate work? And would it be wise to put some 15V zeners on the gates of the fets?
Registered Member #180
Joined: Thu Feb 16 2006, 02:12AM
Location: Ontario, Canada
Posts: 187
In the schematic you posted (richie's) I think he didn't show them switched just for simplicity sake. One of the windings NEEDS to be oppositely wound, or crossed, or whatever. And if its an H-bridge it gets a little more complicated still. I'm not sure about using any NOT gate, but the zeners are a good idea. My first coil had no zeners on the gates and when I ran it CW the fets exploded presumably because I overvolted the gates and shorted them out.
Registered Member #588
Joined: Sat Mar 17 2007, 11:06AM
Location: UK
Posts: 93
Oh right, so what about the push/pull through the GDT? or does it just pulse current through the primary in any direction?... I am finding it impossible to find the UCC driver chips, so I need to make another circuit to go inplace of that.
Registered Member #180
Joined: Thu Feb 16 2006, 02:12AM
Location: Ontario, Canada
Posts: 187
If you cannot get UCC's (try sampling from TI's website, that's where I get all of mine from) then have a look at other peoples gate drive circuits. The UCC's are used together as an H-bridge, one is inverting and the other one isn't. I can't recomend any other gate drive circuits because all I have used so far is UCC's.
Registered Member #588
Joined: Sat Mar 17 2007, 11:06AM
Location: UK
Posts: 93
If I can't get the samples (I hope they ship to the UK) I will make my own GD. Thanks for the help so far, after ive got the chips and fets ill start building it.
Registered Member #505
Joined: Sun Nov 19 2006, 06:42PM
Location: Yorkshire!
Posts: 329
Bacon wrote ...
I have a question about GDTs now, I have seen some designs where one of the secondarys is crossed over, I am guessing this is to invert it, but what about the ones that don't? Is the aim to push and pull current in ither direction of the GDT pimary to power each FET, right?
*toot* All you (n)ever wanted to know about GDTs
TI ship samples to the UK, in nice recycleable packaging too hurrah
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.
SSTC help
