Re: Transformerless TC-Excited Capacitive Transformer?

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

Original poster: "Jolyon Vater Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

Antonio,Rather than slowing down the directly coupled section of
the transformerless twin TC how about speeding up the
capacitive transformer with an intermediate inductor
as in the diagram below.

                   +------+---+----+
                    |         |     |      |
                    |      L2  C4' L3'
+---+--C1--+        |     |      |
|      |            |  +---+   +----+
P    |            |   |     |   a      |
S   SG1    L1 C2  C3     C3'
U    |            |   |     |  b       |
|      |            |   |    +---+     |
+---+--------+   |     |     |     |
                    |    |    L3 C4  |
                    |    |     |     |     |
                   +--+---+---+---+

C1 and L1 form the input resonator.
C3, L3 and C4 form the "capacitive transformer" arm
C3',L3' and C4' form the "transformerless" arm of a
"bridge" which includes L2 and C2; the latter components
form an intermediate directly-coupled (or
transformerless) section to force charge onto the
influence ring (C2 and C3) of the capacitive transformer
ameliorating its slower ringup time.

Would it work?

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, November 09, 2002 3:33 AM
Subject: Re: Transformerless TC-Excited Capacitive Transformer?


 > Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
 >
 > Tesla list wrote:
 >  >
 >  > Original poster: "Jolyon Vater Cox by way of Terry Fritz
 > <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
 >  >
 >  > Is it worthwhile to consider using the directly-coupled Transformerless
TC
 >  > to excite a Capacitive Transformer TC.
 >  > I am thinking of a system where the topload of the "transformerless"
part
 >  > of the circuit is replaced with the influence ring of the subsequent
 >  > "capacitive transformer" section, as in diagram below.
 >  >
 >  >                         (=====)
 >  >                            |
 >  >                            |
 >  >                            L3
 >  >   +----+---C1---+---L2---) L3 (
 >  >   |    |        |          L3
 >  >  PSU   SG       L1         |
 >  >   |    |        |          |
 >  >   +----+--------+----------+
 >  >...
 >  > What are the mathematics of the above circuit- are they basically the
same
 >  > as for the capacitively-coupled Magnifier?
 >  > would it be possible to connect a transformerless TC to a capacitive
 >  > transformer using the normal formulae to get an enhanced hybrid of the
two?
 >
 > This circuit would work much as a directly coupled magnifier, with the
 > important advantage over the basic capacitive transformer system of
 > faster energy transfer. An exact design is possible, although explicit
 > formulas would probably be quite complex (I will try to derive them).
 > A direct cascade can result in good enough behavior, but it's not
 > obvious how to design the coupling elements L2 and C2.
 > I have just implemented a numerical synthesis algorithm for this kind
 > of circuit (this is simple). Element values for use with my available
 > C1 and L3 can be:
 > C1=5 nF
 > L1=65.09 uH
 > L2=2644 uH
 > C2=120.1 pF
 > C3=6.062 pF
 > L3=28.2 mH
 > C4=5.771 pF
 > This circuit would operate with three resonances in the ratio 8:9:10,
 > with total energy transfer in 4.5 cycles.
 > Much better than the basic 4th-order capacitive transformer system,
 > that for the same voltage gain (~20) operates in mode 41:42, with total
 > energy transfer in 21 cycles.
 >
 > Antonio Carlos M. de Queiroz
 >
 >
 >