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Re: Coupling vs secondary voltage chart



Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Steve,

The model is running now at 140uS...

If you send me the following data on you coil I can run it. My coil might be substantially different than yours. The coil I modeled was never meant to be a DRSSTC.

Lprimary =
CPrimary =
K =
Lsecondary =
Csecondary =
Streamer length =
Rail to rail buss voltage =
T1 on time =
Current limit =
BPS =
Max coil power =
If the coil is on your site, which one is it?

Cheers,

        Terry





At 08:43 PM 6/15/2005, you wrote:
Hi Terry


> >I think the rate at which the voltage is changing on the toroid is > >more important than the overall voltage. Low K should take a long > >time to build up, despite that it may build to a higher voltage. I > >think overall the sparks will be shorter =\. > > Yes! Probably very true! But it appears one does not have to risk racing > arcs for performance. If K=0.25 or 0.18 the performance is probably "about > the same". Fascinating that the DRSSTC seems to be so "flat line" for > output voltage. The rough line seems to be the little bouncing off peaks > and such as the K is varying. T1 was 300uS. >

I think 300uS is too long of a time to develop a long streamer.  So
really, your plots would look much different i suspect at say
100-150uS?  Could you test that out and see what it says?  In my
limited experience, i find best "long" streamer production to be had
with shorter T1's in the 100-175uS range, but then again, most of my
coils are maxed out at 200uS, after that the sparks dont grow.  Now
the question is: is that a characteristic of the streamer, or
something to do with the coupling and tank surge impedance (shaping
the current envelope)?

Steve