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 want to wind a secondary for a flyback transformer and rectify its output fully. The didoes cost around ~$20 a piece and its not something that I want to fry being that I need 4 for full-wave.
Second part of this is calculating my output voltage. I want it to be around 8-6kv and around or below the current threshold of the diodes (more current the better).
If im using a ZVS flyback driver can I measure the output voltage of the driver(loaded or unloaded) and then use a voltage to turn ration to calculate the output? Or even a couple high value resistors and read the voltage that way?
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
There is always the cheap solution of putting enough 1N4007 in series and assume 1kV rating for each added diode. You can build a 1MV rectifier for the same price as one those you linked to.
For voltage feedback you could use a voltage divider network as here:
Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
Mads Barnkob wrote ...
There is always the cheap solution of putting enough 1N4007 in series and assume 1kV rating for each added diode. You can build a 1MV rectifier for the same price as one those you linked to.
For voltage feedback you could use a voltage divider network as here:
I would do that but im not sure what kind of current my homemade transformer will be putting out. So using those larger dioeds i will have a 3A head room. Can I limit the output current somehow ? Might be better off using the larger dioeds so i dont have to worry about soldering all of them together and making sure they play nicely
Registered Member #11591
Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556
I find it unlikely that your transformer will output 40kW, or even 16kW. Personally I would just make 4 strings of 10 UF4007s or more if you are still unsure of your output voltage. Diodes play nicely in series. I've never had a problem. You can get 100 for $10.
Registered Member #3114
Joined: Sat Aug 14 2010, 08:33AM
Location:
Posts: 608
hen918 wrote ...
I find it unlikely that your transformer will output 40kW, or even 16kW. Personally I would just make 4 strings of 10 UF4007s or more if you are still unsure of your output voltage. Diodes play nicely in series. I've never had a problem. You can get 100 for $10.
You're probably correct. With that being said if I use this in a tesla coil fashion, wont the spark gap discharge create a spike in current possibly exceeding the ratings of uf4007s? Will the inductive kickback be an issue as well ?
EDIT:I usually order these instead of UF4007's for my higher current project Recovery Times are the same: 75 ns. Im just unsure of any inductive kickback or stress from the spark gap/capacitor. Is there anything I can do to shunt it or protect them ?
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.
Will these work for full-wave rectification ?
