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 #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
I don’t want to divulge what I’m making (I will share later), but it consists of a flyback core and magnet wire. The wire I am using is getting really hot (current). Can i put a resistor on the output of the hv side?!? Will that help anything or will the current be dissipated as heat in the resistor. If it will work what wattage and resistance would I be looking for (ohms or kohms)? I am not concerned with a specific current just a lesser one.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
I think we may need a bit more information before we can help, ie a 'standard' flyback puts out a few mA at most and I use suppressed automotive spark plug lead as resistors.
What are you driving? what is the output current and voltage?
Registered Member #9252
Joined: Fri Jan 04 2013, 06:27AM
Location: Andromeda
Posts: 253
Well. The resistors should have the voltage rating of that thing your making. And i actually bet that won't work. to decrease current.. well i cannot be sure what i will be talking about as i do not know what your doing. But i bet its winding a home made flyback. I know you made a 3000 turns one before :D so if it is a flyback. To decrease heat. Increase windings. So less current but more voltage. Or just give it less input. or make it oil cooled. :D..
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
A resistor in series with the arc will reduce the power dissipation. How much is needed is difficult to determine without more data, but let's suppose that the output voltage is 10 kV and the arc is draining 10 mA. This corresponds to an effective load resistance of 1 Mohm. If you add 1 Mohm of resistance, the current will be reduced to 5 mA, supposing that everything is linear and that the voltage doesn't rise. The resistor will dissipate 5 kV x 5 mA = 25 W. Use a series association of several physically long resistors.
Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
Antonio wrote ...
A resistor in series with the arc will reduce the power dissipation. How much is needed is difficult to determine without more data, but let's suppose that the output voltage is 10 kV and the arc is draining 10 mA. This corresponds to an effective load resistance of 1 Mohm. If you add 1 Mohm of resistance, the current will be reduced to 5 mA, supposing that everything is linear and that the voltage doesn't rise. The resistor will dissipate 5 kV x 5 mA = 25 W. Use a series association of several physically long resistors.
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.
Flyback output current
