Re: Ignition Coil for DC Resonant charging

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "robert & june heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Steve Y: Ignition coils, like a TC, produce a pulse of high voltage as the
magnetic field collapses with the discharge of the o.22uf capacitor If you
cause high voltage current to continue the coil will heat. by using an
isolation diode ( 40 Kv) you can charge capacitors. If you use an ignition
coil to fire a spark gap you nead a series resistor ( resistance wire) to
prevent current being fed back into your coil. Ignition coils can power slow
rep rate TC coils and other DC high voltage circuits, but they do poorly in
any continious power circuits. Pulse charged DC circuits to power a geiger
counter , laser, or low rep rate TC work well.
    Robert  H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 07 Jan 2003 12:39:22 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Ignition Coil for DC Resonant charging
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 7 Jan 2003 12:48:01 -0700
 >
 > Original poster: "Stephen Conner by way of Terry Fritz 
<teslalist-at-qwest-dot-net>"
 > <steve-at-scopeboy-dot-com>
 >
 > At 08:19 07/01/03 -0700, you wrote:
 >> Original poster: "S & J Young by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 >> <youngs-at-konnections-dot-net>
 >>
 >>
 >> Steve,
 >>
 >> No experience with ignition coils, but I have used 3 and 4 MOT secondaries
 >> in series successfully with a DC resonant charging circuit.  You will find
 >> that the more inductance you have, the slower you can run your ASRG before
 >> it power arcs due to the gap dwell time being too long.  I believe ignition
 >> coil secondaries would overheat from the current going through them.
 >> --Steve Young
 >
 > I found some ignition coil data on Jim Lux's website and plugged it into my
 > PSpice simulation. The ignition coil secondary would be dissipating about
 > 50 to 60 watts of heat. The power loss isn't a problem in my system, but if
 > the coil overheats and bursts it wouldn't be too good. As for the
 > inductance: I know more is better but I understand that too much will
 > eventually mess up the performance at the high end. I'm going for 400bps,
 > 20 to 30 Henries is about right for my system and if I can get that from a
 > couple of MOTs that would be great.
 >
 > Steve C.
 >
 >
 >
 >