Re: coupling coefficient

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

Original poster: "Antonio Carlos M. de Queiroz" <acmdq-at-uol-dot-com.br> 

Tesla list wrote:
 >
 > Original poster: "claude masetto" <claudmas-at-optusnet-dot-com.au>
 >
 > Hello to all,
 > I have just calculated the coupling coefficient of my coil using a program.
 > It calculates at 0.158.
 > Not knowing too much about this, I don't know if this is good or bad. The
 > bottom turn of the secondary is level with the primary plane.

The ideal values result in complete energy transfer (ignoring losses),
with all the initial energy in the primary capacitor going to the
secondary distributed capacitance. They are:

Mode 1:2, energy transfer in  1.0 cycles: k= 0.6000000000
Mode 2:3, energy transfer in  1.5 cycles: k= 0.3846153846
Mode 3:4, energy transfer in  2.0 cycles: k= 0.2800000000
Mode 4:5, energy transfer in  2.5 cycles: k= 0.2195121951
Mode 5:6, energy transfer in  3.0 cycles: k= 0.1803278689
Mode 6:7, energy transfer in  3.5 cycles: k= 0.1529411765
Mode 7:8, energy transfer in  4.0 cycles: k= 0.1327433628
Mode 8:9, energy transfer in  4.5 cycles: k= 0.1172413793
Mode 9:10, energy transfer in  5.0 cycles: k= 0.1049723757
Mode 10:11, energy transfer in  5.5 cycles: k= 0.0950226244
Mode 11:12, energy transfer in  6.0 cycles: k= 0.0867924528
Mode 12:13, energy transfer in  6.5 cycles: k= 0.0798722045
Mode 13:14, energy transfer in  7.0 cycles: k= 0.0739726027
Mode 14:15, energy transfer in  7.5 cycles: k= 0.0688836105
Mode 15:16, energy transfer in  8.0 cycles: k= 0.0644490644

But there is no effective difference below, say, k=0.2.

Antonio Carlos M. de Queiroz