Re: DRSSTC design procedure - draft

["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: "Bob (R.A.) Jones" <a1accounting-at-bellsouth-dot-net>

 > Some more intersting equations after AQ intro.

 > Voltage gain is given by Vg = Vin^2* (8/Pi*k)*sqrt(La/Lb)
 > Note: inversely proportional to k!!!

Yes. In that mode of operation more cycles in the energy transfer are
required for higher gain, and the coupling coefficient must be reduced
for this. The same happens with the impedance matching technique.

But there is something strange in your equation. The voltage gain
can't depend on Vin. Pi doesn't appear in the calculation, unless
the input frequency in Hz is present too.

 > Also approximately Voltage gain  Vg = Vin (8/Pi*k)*sqrt(Ca/Cb)

Something like this. But again Vin can't appear.

 > Hence approx bang energy Eb =  Vin^2*32*Ca/(Pi*k)^2 or Vin^2*1945/*k^2

Now the dimension is correct. My present equations don't make k appear
explicitly, so it's difficult to verify now. But you can check with
the numbers from the sstcd program, that are correct.

 > and max E for Ca is 1/4 of this.

I am verifying this "4" relation. So far only for the cosinusoidal
input case, that is simpler. It's never exact, and the exact
relation for any mode is quite complicated. But it tends
to 4 for the regular modes, where the three frequencies are evenly
spaced.

Antonio Carlos M. de Queiroz