Re: Electronic gap-quenching?

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

Original poster: "colin.heath4 by way of Terry Fritz <teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi ken,
         this sounds very persuable to me. although im no expert. the idea of
setting the quench time has to be good
cheers
colin

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 05, 2003 2:03 AM
Subject: Electronic gap-quenching?


 > Original poster: "K. C. Herrick by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <kchdlh-at-juno-dot-com>
 >
 > While noodling around with simulation, I hit on a prospective electronic
 > method for quenching gaps.  The notion is to insert a damping resistance
 > into the primary circuit at the appropriate time, using transistors.
 >
 > I simulated a 500-turn, 50 mH secondary and a 3-turn primary with
 > primary:secondary coupling of 0.15.  The primary damping resistance was 1
 > ohm (in a relatively low-powered circuit) and the shorting-circuit across
 > the 1 ohm resistance had 20 m-ohm resistance.
 >
 > It happens that a long time back I'd developed (in hardware: it works!) a
 > simple 1-transistor circuit for sensing when the spark commences.  It
 > connects into the secondary's return circuit.  One could use that for
 > sensing when to start a timing process leading up to the electronic
 > quenching.
 >
 > I'll prevail on Terry to post http://hot-streamer-dot-com/temp/spk-damp1.pdf
 > and http://hot-streamer-dot-com/temp/spk-damp2.pdf.  Those are
 > simulation-waveforms of primary current and secondary voltage, for one
 > spark-event, with and without such damping inserted.  Green curves are
 > with & red are without.  The damping resistance is inserted at 38.88 ms
 > and shorted out again 300 us later.
 >
 > Would this notion be worth pursuing, do you suppose?
 >
 > Ken Herrick
 >
 >
 >