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.
so is it possible because I would love to pump more power into the coil I dont really cair about the losses unless its enormous and I will build the brick driver to drive the gates as fast as possible
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
I would still say they are far too slow. You will end up switching enormous currents because of that turn off time. Also, because the turn on and off are so very mis-matched, you will need to add deadtime to the gate drive so you dont have shoot-through. Looking at the graphs on the datasheet, it seems you cannot improve Toff with a better gate driver (its pretty much fixed at 2uS).
FYI, the CM300 IGBTs i use at 40khz have something like 300nS Td and 350nS Tf which outperforms your IGBT by a good margin, and i still consider it to be less than optimal running these things at 40khz.
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
Well umm, i suppose you could but you will need to build better gate drivers etc... which is quite a project. Just dont think its gonna be easy and fast to put together (its a large step up from the simple DRSSTC setup you used). Its really overkill too, but that isnt a bad thing necessarily.
Registered Member #154
Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
Why not try and get hold of some HGT1N40N60A4D mini brick igbt's which would be a ideal for your DRSSTC driver, and will make your coil more durable than the ones you are using now. they are harder to find these days but not impossible, folks are still selling them on ebay etc. or the slightly less rated HGT1N30N60A4D which is more readily available. Steve Ward uses a full bridge of them in his DRSSTC1 and gets some 80 plus inches of spark. As Steve said, upgrading to CM bricks involves more complicated driver circuitry needed as well as seperate isolated power supplies to feed the aditional drivers.
thanks I think I am getting a 400A 1200V 30-60Khz rated dual IGBT brick pack if no one out bids me this should be nice. I will start to work on constructing the improved gate driver, but am thinking of making it a removable module so I can use it on multiple projects, It would be to take 120VAC then bring that switched like I have seen for the isolated PSU and the gate driver input, then just have plugs for all the gates. I was only thinking as I am also working on an extreamly advanced all in one fiber interrupters, that this upgrade would be nice. My only other questions are , is there a more reliable and tunable logic circuit I should use, and how difficult would it be to set up an under voltage lockout and a no signal/out of phase signal lockout so if the gate driver fails it wont bring both IGBTs high? The bricks are $$$$
Registered Member #154
Joined: Sun Feb 12 2006, 04:28PM
Location: Westmidlands, UK
Posts: 260
For examples of under voltage shut down circuits, take a look at Dan McCauleys site under his 'Advanced self resonant driver' he uses a simple op amp/comparator ic and a few other components. i beleive Steve Connor also uses a similar circuit on his DRSSTC.
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.
What to do with these IGBT Modules (FMG2G300LS60E)( hopefully Tesla coil related)
