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RE: Fullwave rectifier
Subject: RE: Fullwave rectifier
Date: Mon, 19 May 1997 09:46:00 +0100
From: Ashley Golland <Ashley.Golland-at-gpsemi-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
In response to your question of using diodes in series generally at
50/60Hz you can just put them in series with few voltage grading
components as there will be minimal differences in the individual diodes
recovery times relative to the rate of rise of reverse voltage.
However you should derate the devices by say 30% to allow for
differences in leakage, stored charge etc.
A more serious approach would be to use either avalanche diodes or RC
snubbers across each of the diodes, but this is probably unnecessary as
long as you make sure no H.F. is reflected back at your bridge.
As far as sources of diodes goes, I have some at 8Kv 100A but they cost
a fortune.
----------
From: Tesla List
To: tesla-at-poodle.pupman-dot-com
Subject: Fullwave rectifier
Date: 18 May 1997 04:27
Subject: Fullwave rectifier
Date: Sat, 17 May 1997 18:04:19 -0700
From: David Trimmell <dwt-at-efn-dot-org>
To: tesla-at-pupman-dot-com
Hello,
I am going to be working on modulating the output of my Tube coil, and
am curently working on designing a filtered DC supply from a Microwave
oven Trany. My first step will be to make the fullwave rectifier. As, I
am not an EE and have not much training in the field (I work in the area
of Radiation Health Physics sciences), I have some very basic questions
regarding diodes in general. First, as HV, High current diodes are not
the easyest things to obtain, what are the ramifications of series
implementation of lower voltage for higher voltage? Perhaps, I am a bit
to familiar with Capacitors and am getting confused? Second, well, if I
am going to need to find a supplier of HV Diodes, does anyone on this
list have any sugestions? About one Kilovolt AC at 35 Amps has been the
highest I'v seen recently. Any help is more than welcome. Thanks,
David Trimmell