I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A given
110/220VAC input. A commercial product would work too, but I've never
seen such a thing. It need not be regulated, but I would want it to be
switching (to reduce weight/size.) I am having trouble getting started
on my search for information.

73 Dave WB0GAZ

wb0gaz wrote:
I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A given
110/220VAC input. A commercial product would work too, but I've never
seen such a thing. It need not be regulated, but I would want it to be
switching (to reduce weight/size.) I am having trouble getting started
on my search for information.

Hi Dave,
QEX had an article in the February 1991 issue by W9QQ about such a
beast, with a corrigendum in the August '91 issue and a comment in the
December, '91 issue.

I was well along in the paper phase of a design when I saw an ad in QST for
http://www.wattsunlimited.com/
where you can get a kit or assembled HV switching supply. They claim
1.1 amps at 2500 VDC, you could probably wind the secondary for 1 kV or
have them do it for you.

I haven't sunk the money in it yet, other things getting in the way but
it looks like an easy way to get HV at an amp or two.

W8LNA

gwatts wrote:


QEX had an article in the February 1991 issue by W9QQ...
http://www.wattsunlimited.com/
where you can get a kit or assembled HV switching supply. They claim...

A quick look at a call lookup page and tech above web page show that
'they' is W9QQ, or at least 'they're' at the same address.

gwatts wrote:

wb0gaz wrote:

I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A...
QEX had an article in the February 1991 issue by W9QQ...
http://www.wattsunlimited.com/


A quick look at a call lookup page and tech above web page show that
'they' is W9QQ, or at least 'they're' at the same address.

W8LNA

Local metal work shop have them.....they are called Arc welders!!! LOL

Andre
"gwatts" wrote in message
...
wb0gaz wrote:
I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A given
110/220VAC input. A commercial product would work too, but I've never
seen such a thing. It need not be regulated, but I would want it to be
switching (to reduce weight/size.) I am having trouble getting started
on my search for information.

Hi Dave,
QEX had an article in the February 1991 issue by W9QQ about such a
beast, with a corrigendum in the August '91 issue and a comment in the
December, '91 issue.

I was well along in the paper phase of a design when I saw an ad in QST
for
http://www.wattsunlimited.com/
where you can get a kit or assembled HV switching supply. They claim
1.1 amps at 2500 VDC, you could probably wind the secondary for 1 kV or
have them do it for you.

I haven't sunk the money in it yet, other things getting in the way but
it looks like an easy way to get HV at an amp or two.

W8LNA

"wb0gaz" wrote in message oups.com...
I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A given
110/220VAC input. A commercial product would work too, but I've never
seen such a thing. It need not be regulated, but I would want it to be
switching (to reduce weight/size.) I am having trouble getting started
on my search for information.

You might want to consider a linear supply anyway.

You may have difficulty lifting a 2000 watt linear supply,
but you can be highly confident that it will work. In
most cases, this is what really matters...

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

On 20 Feb 2005 15:42:20 -0800, "wb0gaz" wrote:

I'm looking for design (or at least pointer to some information about)
for a switching power supply that would provide about 1KV @ 2A given
110/220VAC input. A commercial product would work too, but I've never
seen such a thing.

One thing that might be interesting to study is to get some commercial
(surplus) product having 200-400 V secondary and adding some voltage
multiplier stages after it. At frequencies well above the mains
frequency, quite small capacitors are required in the voltage
multiplier.

Depending on the multiplier chosen, the primary switcher should either
be symmetric (push-pull) or asymmetric. Due to the limited isolation
voltage between the primary and secondary, it might be a good idea of
choosing a multiplier configuration, in which the secondary is close
to ground (e.g. one side or CT grounded). As with all switcher
rectifiers and capacitors, great care is required in selecting
components with sufficiently low ESR at the actual operating frequency
and low inductances, otherwise they might explode.

Paul OH3LWR