Ignition coil HV supplies?

To: tesla-at-pupman-dot-com
Subject: Ignition coil HV supplies?
From: "Bill the arcstarter" <arcstarter-at-hotmail-dot-com> (by way of Terry Fritz <twf-at-verinet-dot-com>)
Date: Thu, 07 Jan 1999 12:45:57 -0700
Approved: twf-at-verinet-dot-com

Hello Scott, Sam, Barry, and list.

I've been watching the three of you discuss various ways of extracting 
large amts of HV power from ignition coils using dimmers, scrs and the 
like.

I suggest you check out this page on my site:
http://www.geocities-dot-com/capecanaveral/hangar/6160/hvtank/hvtank.html

This page describes the theory of operation of the SCR switching supply 
from a 60kva 140 kv x-ray transformer. 

This device dumps a 4 to 40 uf cap at 250 volts into an inductive load 
(like an ignition coil? :)  ) at a rate of 6-9KHz.  

Perhaps that'll give you a hint as to how to abuse your coils more 
efficiently!

One key thing is that they added extra inductance separate from the 
load.  This inductance limits the di/dt of the current - which is 
required if you want your SCRs to survive...

-Bill


______________________________________________________
Get Your Private, Free Email at http://www.hotmail-dot-com