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 #3283
Joined: Wed Oct 06 2010, 11:03PM
Location: Toronto, Canada
Posts: 29
ubuntupokemoninc wrote ...
I need 2 ohms
2 ohms would give 2/(120 x Pi) = 5.31mH or 5310uH
Any inductor/choke in this approximate range will work fine. You can build your own by winding wire around an iron bar or around a ferrite core.
If you're uncomfortable winding your own, you can also use audio crossover inductors, they can usually be purchased at a fairly modest price($10-$20)...
Scotchtapelord - The OP wants to power a flyback driver with this PSU; most likely a ZVS driver. I honestly have no idea if a ripply power supply will effect a ZVS driver but it certainly can't be good for it.
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
Well, people run solid state tesla coils right off rectified mains with no filtering at all! I say use a big capacitor right after the rectifier and put a reverse zener diode on it to clip the peaks. It will have losses when idling but once you begin to pull the current the waveform should even out below the zener diode clamping voltage, with a ripple inversely proportional to your capacitance, and it should be fine without any big ferrites. (A Henry is A LOT of inductance!)
Registered Member #3283
Joined: Wed Oct 06 2010, 11:03PM
Location: Toronto, Canada
Posts: 29
Well, I suppose a capacitor should be sufficient for filtering but it doesn't hurt to clean it up a bit. It's pretty much up to the OP.
BTW, 1H isn't that much ;) I use to do some tube audio stuff and 5-20H B+ filter chokes are the norm. Tube output transformers with 30+ henry primaries are also very common...
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
if you want more power rewind another mot and put it in series. Don't forget about the phasing, you will need about 30-40Vac @ 10A and then use a standerd rectifier-filter cap. another option is to use a smaller gauge wire no smaller than 18 with thin insulation.
Banned on 1/22/2011 for repeated rule violations after multiple warnings. Registered Member #3299
Joined: Sat Oct 09 2010, 08:11PM
Location: Bantown, USA
Posts: 220
yeah I mean't micro hernes, not hernes, I tried it today and fried the mosfets I ordered some IRFP250's this time i'll make a full bridge.
pulled a big narly arc out to about 8 inches before the fets poped
I guess that's what i get for using fets i plucked out of a computer monitor
Registered Member #3093
Joined: Mon Aug 09 2010, 11:40PM
Location:
Posts: 68
ubuntupokemoninc wrote ...
yeah I mean't micro hernes, not hernes, I tried it today and fried the mosfets I ordered some IRFP250's this time i'll make a full bridge.
pulled a big narly arc out to about 8 inches before the fets poped
I guess that's what i get for using fets i plucked out of a computer monitor
Wait, are you making an sstc? The zvs driver is not a half-bridge, and canot be modified to be a full-bridge, as far as I know. But dude, 8 inches?! thats some crazy length for 15 volts!
Banned on 1/22/2011 for repeated rule violations after multiple warnings. Registered Member #3299
Joined: Sat Oct 09 2010, 08:11PM
Location: Bantown, USA
Posts: 220
8-)Actually its 20volts when rectified
what I Meant by a full bridge is 2 parreled fets, so that be 4 fets instead of 2.
here is a video of someone feeding it with ripple dc, and he doesn't seem to have any problems
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.
need to make a 15 volts dc filter curcuit for a zvs driver
I ordered some IRFP250's this time i'll make a full bridge.
