Re: In search for a better PRIMARY

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>

Hi Gerry,

At 08:47 PM 8/14/2006, you wrote:
> Hi Terry,
>
> I dont think one needs the inductance nor di/dt if you just compute 
> the volts per turn.  If the primary cap fires with say 20KV into a 
> 20 turn primary then the primary will have 1000 volts per turn.  The 
> volts per turn in the secondary (neglecting the distributed C) will 
> be this value * kn.  So if kn for that turn of the secondary is 
> 0.20, then that turn will have 200volts induced into it (transformer action).

OH!!!  Shows what "i" know :o)))  I was noticing factors seems to 
cancel all out and such...  So cool!!

> The initial di/dt of the primary and secondary will fall out from 
> the inductance of the primary and the inductance for that turn of 
> the secondary (not sure how the magnetic coupling of that turn with 
> others in the secondary affects this).  Also, I'm not sure if 
> whether the coil is or is not in tune will affect this initial voltage profile

It should not since no tuning has a chance to setup in the first few 
hundred nS...

> , but sure will affect subsequent profiles.

Yep!!


> What I need to know in order to spice this is how to model a section 
> of secondary coil where all the other sections are coupling into it 
> as well as the primary.

MicroSim can model like ten mutually coupled sections with the "K" 
function if that is what you want.  I am sure the other spice things 
do exactly the same too.

> I believe Antonio gave you a program where there was a NxN coupling 
> matrix to figure this out, but something to run in C and not a spice program.

???  Got a name of it or a clue??

There is ACE used in scan Tesla.

Inca too...

http://www.coe.ufrj.br/~acmq/programs/

Cheers,

        Terry



> Gerry R.
..........