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.
Finally had the parts to put together my first zvs flyback as to join to "the group". :)
Not much but still an advancement from the first 2n3055 flyback. Maybe some of the parts are way overkill. Caps warm up a bit after a while of use but besides that it seems to be running cool.
Registered Member #51
Joined: Thu Feb 09 2006, 04:17AM
Location:
Posts: 263
Nicely done.
Pictures should be 400px (or is it 450px?) wide, you will want to resize them or use thumbnails. Youtube is also nice for hosting videos, I think you will find that fewer people watch your videos when they have to download the AVI rather than simply going to youtube.
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
Nice work. I like the compactness of the driver. If you add more filter capacitance then you will get rid of the humming when you draw the arc. What are the ratings on your supply?
theju wrote ...
nice work, but i would use shorter connections to the flyback transformer
and the capacitor is suboptimal, you should replace it with a mkp10 or fkp type then it won´t heat up :P
I agree. You should either use more caps and make a small MMC bank or get a better cap that can handle more power so it doesn't heat up at higher powers. Why should he shorten the connections to the flyback? Stray inductance in series with the flyback's primary doesn't affect the operation of the driver that much. I think that keeping the stry inductance between the caps and the MOSFETs are more important.
Registered Member #1806
Joined: Sun Nov 09 2008, 04:58AM
Location: USA
Posts: 136
Youtube sucks, they transcode, and downsample whatever you upload into that crap flv format. Now, more recently, they support mp4, but it is still transcoding what you upload; with the inherent quality reduction... caused by the transcoding. I'll take a file that is the direct output of the thing that took the video in the first place over a mangled yousuck video any day!
Nice work. I like the compactness of the driver. If you add more filter capacitance then you will get rid of the humming when you draw the arc. What are the ratings on your supply?
I agree. You should either use more caps and make a small MMC bank or get a better cap that can handle more power so it doesn't heat up at higher powers.
Transformer is 230V 180VA on the primary side, 2x12V on the secondary. Other than that, difficult to say. I propably didn't pay enough attention while in school to understand all the powerfactor stuff.
Measuring from the rectifier section the output is 16VDC when idle and 12.5VDC when drawing arcs.
And replacing the cap would do. Even seems to warm up when sitting idle. But the filtering is ok as is. I like the humming arc. Sounds like electricity. :)
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Better filtering will indeed increase power throughput and give you thicker arcs. It seems it can also reduce flyback heating. The driver looks good :). I cannot view the video *murmurs something about windows media player*.
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.