re: Etesla6 math questions

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi Pete,

At 02:00 PM 2/4/2003 -0800, you wrote:
>Terry,
>       refering to the (beautiful!) plots in:
>
><http://hot-streamer-dot-com/andrewb/models/models.htm>
>
>If the E-field is the gradient of the voltage, and the voltage is a scalar
>field then the gradient is a vector field. Perhaps you plotted the absolute
>value of the E-field in the bottom pictures?

The pretty picture here is just the raw voltage values.

http://hot-streamer-dot-com/andrewb/models/voutput.jpg

This one is the highest voltage between the nearest points (the 
gradeint).  I subtract a given points voltage from those around it to get 
the value here:

http://hot-streamer-dot-com/andrewb/models/soutput.gif


>We normally talk about the turn-to-turn voltage along the secondary,
>implying a vertically oriented E-field in the immediate vicinity of
>the secondary. Some of Paul's TSSP work computes the location along
>the secondary at which the turn-to-turn voltage peaks, being a prime
>suspect region for arc overs. Do your plots show that this is not
>the whole picture, they seem to be showing a stronger E-field towards
>the upper portion of the secondary - or do we need a finer granularity
>plot and the vector direction too to make such an observation.

I "think" my and Paul's data are basically the same (they should be).  But 
a say sharp or large toroid by cause odd voltage gradients that may arc in 
odd places.  One can do many situations and probably some messy ones...

Cheers,

         Terry




>Pete Lawrence.