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 #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
If you can find two the same, you could put them side by side and double your volts per turn. You'd also be able to put twice the power (Watts) through it.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
From your values, I got around 38 turns, so use 40 and all will be fine.
BTW, what kind of power supply are you making? Forward, or just a simple non-stabilised supply (which is not really technically correct)? For the first one, you can't just calculate the secondary number of turns based on the voltage ratio, and you need to use a DC link inductor after the rectifier.
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Im afraid my knowlage is patchy im nay areas as i only have AS level electronics under my belt (doing A2 next year) and a bit more from self education, i doubt i will ever go to uni due to my a-level grades (completely failed maths in the most amazing way possible...)
im unsure really of how im going to have it designed to be honest as there are many topologys, have you got any schematics you can show me of some of the topologys / text on how they work?
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
If I understand your question correctly, the simplest way to drive it would be with a centre tapped primary, and two transistors, similar to the Mazilli ZVS primary.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I guess this is a supply for isolated gate drivers? If it was me, I would run it off 24V DC, make it a flyback converter and use a LM2586 "Simple Switcher" to drive it.
This enables a single diode rectifier for each secondary. Also you can use a fifth winding with the same rectifier circuit, for feedback to the LM2586. You must use feedback to keep the output voltage of a flyback converter under control, but you just need to regulate one output on a multi-output converter and the others will (kind of ) track it.
If I needed more power, I'd use rectified mains and substitute a Viper or Topswitch for the LM2586. The fifth winding could power the chip as well as supplying a feedback signal.
The isolated gate driver supply I use just now is powered by a ZVS as Ash suggests. It works fine, but it needs a more complicated rectifier circuit on each output than a flyback converter would, and even then the regulation is poor.
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
While not as simple or efficient as Steve's suggestion, if I was building this circuit (and I probably will at some point in the near future) I'd probably use some stud zeners on heatsinks for regulation (along with a bridge rectifier and electrolytic smoothing cap).
Registered Member #3324
Joined: Sun Oct 17 2010, 06:57PM
Location:
Posts: 1276
Steve Conner wrote ...
I guess this is a supply for isolated gate drivers? If it was me, I would run it off 24V DC, make it a flyback converter and use a LM2586 "Simple Switcher" to drive it.
This enables a single diode rectifier for each secondary. Also you can use a fifth winding with the same rectifier circuit, for feedback to the LM2586. You must use feedback to keep the output voltage of a flyback converter under control, but you just need to regulate one output on a multi-output converter and the others will (kind of ) track it.
If I needed more power, I'd use rectified mains and substitute a Viper or Topswitch for the LM2586. The fifth winding could power the chip as well as supplying a feedback signal.
The isolated gate driver supply I use just now is powered by a ZVS as Ash suggests. It works fine, but it needs a more complicated rectifier circuit on each output than a flyback converter would, and even then the regulation is poor.
My over all idea is a 13.8Kw HV supply, (230vrms, 60A) to keep the silicon cost down im thinking of making it 6 phase so instead of some large IGBTs i can use 12 10A mosfets i am working on a schematic as of now currently brainstorming on how the driver will work due to 6 phases being alot more complex then 1
due to the cost of components i plan to make a small scale 1/10th the size running at about 24v @ 6A in for a working scale model before blowing it up to full size if you think this is a wize idea it would also be a nice thing to take to job interviews (alot smaller then a system the size of a suitcase or more.)
once i got a rough schematic idea for most of it, i will make a new thread until then il use this one for advice.
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.
Turns per volt on this type of ferrite?
) track it.
