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 #4123
Joined: Wed Oct 05 2011, 07:47PM
Location: Shawnigan Lake, B.C. ,Canada
Posts: 5
You're saying that a pair of coupled primary coils connecting to different bridges can equalize the current from each bridge and come up with a more powerful output at the secondary terminal. Is that right?
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Some people use multiple primary coils. As far as I know, Steve Ward's Gigantor has 4 primary conductors side by side, each driven by its own H-bridge. The leakage inductance between primaries acts as a ballast to promote current sharing.
However, I've also seen people use a single primary coil with balancing chokes on the inverter outputs. You can either use small air-cored inductors, or bifilar wound transformers on large ferrite rings. These transformers are wired just like in the diagrams I showed for paralleling variacs. In the two-inverter case, they act as common-mode chokes, and by choking the common-mode current down to zero, the inverter output currents are forced equal.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
A side note: mosfets share current equally anyways when in parallel due to resistive heating in the device.
And the coupled bridges with transformers: i talked to Steve Ward about it a couple weeks ago in respect to my drsstc. It is by far the easiest way to get equal sharing in high stress applications. But if you just want to reduce losses in a single bridge it is really not the way to go. Using two bridges in the place of one plus coupling parts isn't cost effective. But in a drsstc where you want a higher power regardless of price, then two bridges where each one is pushed to its limit is definitely the way to go.
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.
New experimental topology – the tricky way to use multi-phase bridge~
