[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Racing sparks vs. primary design



Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi,

MandK can do it two if you take the coil in 0.5 inch sections:

----------------------
 Mutual Inductance Program V3.1
 Copyright (c) 1998, 1999, 2000 by Mark S. Rzeszotarski, Ph.D.

 Flat Spiral Primary Coil Geometry
 Primary coil inside diameter (inches)=      6.800
 Primary coil outside diameter (inches)=     16.200
 Number of primary coil turns =     13.000
 Wire diameter (inches)=      .2500

 Solenoidal Secondary Coil Geometry
 Secondary coil diameter (inches)=     6.000
 Secondary coil height (inches)=       .500
 Number of secondary coil turns =    68.000
 Secondary coil wire diameter (inches)=      .0126

 Mutual Inductance Results
 Position is the secondary coil bottom wire position in inches
 above the bottom wire of the primary coil.
 A negative value means the bottom wire of the
 secondary is below the bottom wire of the primary.
 A positive value means that the bottom wire of the
 secondary is above the bottom wire of the primary coil.
 M = Mutual Inductance in microhenries
 K = Coefficient of Coupling: K =  M / square root ( Lp x Ls )

           Position           M                K
             .000          87.628           .3039
             .500          80.644           .2797
            1.000          71.829           .2491
            1.500          63.184           .2191
            2.000          55.253           .1916
            2.500          48.181           .1671
            3.000          41.972           .1456
            3.500          36.568           .1268
            4.000          31.892           .1106
            4.500          27.858           .0966
            5.000          24.383           .0846
            5.500          21.391           .0742
            6.000          18.814           .0653
            6.500          16.592           .0575
            7.000          14.673           .0509
            7.500          13.013           .0451
            8.000          11.573           .0401
            8.500          10.322           .0358
            9.000           9.232           .0320
            9.500           8.280           .0287
           10.000           7.446           .0258
           10.500           6.714           .0233
           11.000           6.069           .0210
           11.500           5.500           .0191
           12.000           4.996           .0173
           12.500           4.549           .0158
           13.000           4.151           .0144
           13.500           3.797           .0132
           14.000           3.480           .0121
           14.500           3.196           .0111
           15.000           2.940           .0102
           15.500           2.711           .0094
           16.000           2.504           .0087
           16.500           2.316           .0080
           17.000           2.147           .0074
           17.500           1.993           .0069
           18.000           1.853           .0064
           18.500           1.725           .0060
           19.000           1.609           .0056
           19.500           1.503           .0052
           20.000           1.405           .0049
-----------------------

Cheers,

        Terry



At 04:58 PM 7/11/2005, you wrote:
On Mon, 11 Jul 2005 12:57:40 -0500, Tesla list <tesla@xxxxxxxxxx> wrote:

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Malcolm,

One might try to break the secondary into segments and see what the
coupling is into each segment using JavaTC.  Certainly, the upper most
segment would have the least coupling and the bottom segment would have the
most coupling. The outer turn of a flat pancake primary would give the most
uniform coupling across the various segments and the inner turn of the
pancake would give the least uniform coupling.


I believe Antonio's program "Inca" can handle something like this:

http://www.coe.ufrj.br/~acmq/programs/inca.zip
http://www.coe.ufrj.br/~acmq/tesla/maxwell.pdf

Mark Broker
The Geek Group