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Re: [Amps] SMPS Question

To: amps@contesting.com
Subject: Re: [Amps] SMPS Question
From: Chris Wilson <chris@chriswilson.tv>
Reply-to: Chris Wilson <chris@chriswilson.tv>
Date: Fri, 24 Jul 2015 16:29:46 +0100
List-post: <amps@contesting.com">mailto:amps@contesting.com>

Hello Charlie,

On Tuesday, July 21, 2015,  you wrote:

> Along the same vein as Colin, I have an adjustable 0-4kv, 0-2.5Amp SMPS. It
> has a switch freq of 18 khz.

> Will this allow to change the Ep, and not retune?

> If so, why not use more often? Seems like an efficient way to go. Much
> lighter, and voltage regulation is <1%.

> What am I missing?

> Charlie N6CFH


I would be most interested in seeing photos and a schematic of this,
or a similar high voltage, high current SMPS, either home brew or
commercial. The tight voltage regulation, and not having to put my
back out lifting huge linear supplies is very appealing!

A big thanks to Manfred too, for another fascinating post on SMPS
matters.

I run a big transformer that gives 5kV at well over an Amp off a 25
Amp variac. I mainly run it with the variac switched out, but it's a
very useful beast for general HV supply duty, and regulation, looked
at on a scope with a loosely coupled coil winding, is pretty good even
with the variac giving about 180V AC into it, instead of our UK 240V @
50Hz. It's just so *BIG* though, in a castored cabinet, and would need
dismantling to safely get it down the stairs from my upstairs "shack".




-- 
Best regards,
 Chris                            mailto:chris@chriswilson.tv

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