Re: Racing Spark Prediction - poles

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

There is another factor that I am not sure has been mentioned that 
might contribute to racing arcs.  This is the upper and lower tuning 
modes or poles that are so familiar to DRSSTC fans.

http://www.pupman.com/listarchives/2005/Feb/msg00048.html

These two modes cause the "rift" in Lpri vs. coupling graphs like this:

http://hot-streamer.com/temp/BigCoil-AsIs-03.gif

They can produce very odd primary current waveforms like this:

http://hot-streamer.com/temp/NightmareWave.gif

Obviously a problem for DRSSTC folks trying to do zero current 
H-bridge switching...  Although I think Steve Conner did manage it 
with even a PLL!!

But these two modes fighting (and possibly transitioning as a 
streamer changes the coil's tuning) probably present some pretty hard 
"kicks" to the secondary voltage profile.

"If" so, the racing arcs would be very sensitive to coupling and 
might actually go away with "increased" coupling.  Very slight 
changes to primary to secondary tuning would also make or break the 
racing arcs.  Depending on what happens when, I would think it would 
be possible for the arcs to appear anywhere on the secondary but they 
would probably be more likely near the bottom since that is where the drive is.

Sometime I will try to play with this.  There is a lot going on and 
such measurements are filled with potential errors.  The SISG solves 
many of them ;-)

Let me know if my thinking on this is incorrect.

Cheers,

	Terry