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Re: Streamer length vs. power delivery time...



Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi again Steve ;-)

I made this file of what I think your coil is doing:

http://drsstc.com/~terrell/modeling/StevesCoil85uS.pdf

700 Primary amps peak. Fast Ipri shutdown and all....

From page four...

701 amps peak
ICPriRMS = 3.4 * sqrt (120) = 37.25 amps RMS
VCpriPeak = 3247V
8.09 joules/bang x 120 = 971 watts
Load Energy = 2.02 * 120 = 242watts
Rise time = 70.5uS

Does this all seem about right?

The program says your Lp = 10.27uH. If it were 12.1uH, the program says (last page):

401 amps peak
ICPriRMS = 2.033* sqrt (120) = 22.27 amps RMS
VCpriPeak = 2049V
6.15 joules/bang x 120 = 738 watts
Load Energy = 3.54 * 120 = 425 watts
Rise time = 86.7uS

So going from Lp = 10.27 to Lp = 12.1uH would increase streamer power 75% (spark length 32% further) while reducing all the input levels.... Rise time would increase 23%....

Cheers,

        Terry



At 09:35 PM 6/18/2005, you wrote:
Hi Terry,

I ran my coil tonight, posted results (including pictures) on its webpage:

http://www.stevehv.4hv.org/DRSSTC1.htm

I got 72" strikes with only 6 cycles!!  That should be 8.7J bang
energy or about 1044W at 120bps.  The MMC only got to about body temp
:-).

Anyway, the primary current was up to 700A with air streamers and
briefly tripped the 800A limiter during heavy ground strikes.  I will
play with the Rprimary in pspice to try to make my primary current
match up.  I found Rprimary to be extremely crucial to everything.

Also, there is NO energy left in the primary 1 cycle after the driver
is shut off (the current hits zero fast).  Pspice did NOT match this
with the 6p+220k streamer, in fact it took maybe another 6-7 cycles
before the current hit zero.  Something isnt right with the model
yet...

Steve

On 6/18/05, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi Steve,
>
> I am having a little trouble getting MicroSim and ScanTesla to agree about
> things this night...
>
> I "think" Rprimary should be about in the 0.5 ohm range for a DRSSTC. That
> is a pretty critical factor. We will have to really test it as time permits...
>
> So Let me work on it awhile and see if I can fix things...
>
> Cheers,
>
> Terry