Re: Who needs a quenching gap ?

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

Original poster: "Marco Denicolai by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Marco.Denicolai-at-tellabs.fi>

Dear Antonio.

I don't understand a couple of things.

1. How do you define "full primary cycle"? Is it a full wave (negative and
positive excursion) or only a semi-wave (negative OR positive excursion)?

2. Looking at the waveform, how you can "see" when the total energy
transfer has
completed?

3. How it can be that this transfer completes at the second or Nth envelope
notch? I always though that at each notch ALL the energy has gone once to the
secondary and back to the primary, partly dissipated in losses: how's that?

Regards






"Tesla list" <tesla-at-pupman-dot-com> on 09.12.2000 20:31:13

To:   tesla-at-pupman-dot-com
cc:    (bcc: Marco Denicolai/MARTIS)
Subject:  Re: Who needs a quenching gap ?



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

Tesla list wrote:

> Original poster: "Finn Hammer" <f-hammer-at-post5.tele.dk>

> I believe it is possible to determine the coupling from this trace, how
> is that done?

To have an idea, I list below where is the first notch of the primary
voltage for the first optimum coupling coefficients. Look at the
comments
at the end, facts that I have just observed:

First series:
These are the most usual modes, with total energy transfer at the 1st
envelope notch.

mode k         cycles (primary)
1,2  3/5  = 0.600   1.0
2,3  5/13 = 0.385   1.5
<SNIP>
Second series:
There modes result in total transfer at the -second- envelope notch.
I don't list the modes equivalent to the 1st series.

mode k         cycles (primary)
1,4  15/17     = 0.882   2.0
2,5  21/29     = 0.724   2.5
<SNIP>

In general: a=integer, b=a+odd integer:

mode=a,b;  k=(b^2-a^2)/(b^2+a^2); full primary cycles=b/2
Or k~=1/(2*cycles), as mentioned in other posts.

Note the curious fact that it's possible to have total energy transfer
at the 1st notch (modes a,a+1), at the second notch (modes a,a+3), or
at the nth notch (modes a,a+2*n-1).
Close to each optimum k for total transfer at the 1st notch there are
two values of k the result in total transfer at the second notch.
Close to these ks there are other values that result in total transfer
at the 3rd noth, and so on. There is also a set of high optimum
couplings
corresponding to modes 1,1+odd integer, and the families that appear
around them.
<SNIP>
Antonio Carlos M. de Queiroz