DC Supplies & Protection

To: tesla-at-pupman-dot-com
Subject: DC Supplies & Protection
From: Mark Finnis <mefinnis-at-medicine.adelaide.edu.au> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Wed, 23 Sep 1998 17:33:39 -0600
Approved: terryf-at-verinet-dot-com


Further to recent posts, I am researching a 3-phase full-wave  DC supply
using NSTs and an async-RSG.

Leaving the rectification bit for a moment, what about protection ?

Have followed Malcolm/Terry's work and use only an RC filter for my current
NST supply and this appears to work very well  (read my 2 NSTs are alive
and well and the safety gap virtually never fires).

Now DC is going to be a little different.  We wont have to worry about
harmonics induced from the primary resonant circuit ....... or will we ???

Will chokes have a real place here (I strongly suspect to protect the
semi-conductors of the bridge) ?? 

If so, specifically what size choke (#turns)?

What else & where would you put it ?

Comments welcomed ....... especially from those using DC supplies ;-)

Thanks,

Mark

http://www.cobweb-dot-com.au/~dkfinnis