Date: Sat, 21 Sep 2013 09:50:52 -0700
From: Don Jones <ko7i@comcast.net>
To: amps@contesting.com
Subject: Re: [Amps] Direct rectification of AC mains to drive the amp,
VDD Supply
This is tricky. If the outlet you are using as the source is not daisy
chained to a bunch of other outlets and goes directly to the panel, and
you use a true 3 wire connection L1, L2 (or N) and Gnd, you can "get
away" with it provided you use an appropriately selected EMC filter too.
It is safe and efficient? no, heed the advice that you have been given
by others.
Vy 73, Don KO7i.
## Why wouldn’t it be efficient ? With direct rectification you just
eliminated
the xfmr ! Now you have NO limit to the amount of power you can generate.
No V drop across any xfmr either, no sag...no xfmr. Both static and dynamic
regulation would be
better, a lot better. No magnetizing current on the primary of the xfmr as
there is no xfmr.
No heat generated from the xfmr...as there is NO xfmr. You also just freed up
a ton of
space. You also eliminated a ton of weight.
## For high power use, Id say it’s the ideal ticket. All you need is big ga
CU wire back to the
main 200A panel. I would not write off a transformerless supply just yet.
I think we are just getting
started. 240 x 1.414 = 340 vdc.......and @ 10-100A CCS easily.
Jim VE7RF
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