Re: Coupling vs secondary voltage chart

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Original poster: boris petkovic <petkovic7@xxxxxxxxx>



>  > always true that the longest arcs from
> disruptively
>  > operated TC must be the ones that dissipate the
>  > highest power?
>
> Where else would the power go?  It has to be used
> somewhere.
-----
Where does 3 kw of power in Steve C's OLTC go to?
Tuned for the best spark output (althought there is no
much room to tune in OLTC primary bank systems),it
delivers  ~6' at ~3500 W/400 BPS.
-----


>
>  >
>  > My gut feel is this might not be always the case.
>  >
>  > Longer rise times (over more rf cycles) are good
> for
>  > arc propagation and they are achieved by lowering
> the
>  > coupling.
>
> Where did you get this idea?  Maybe we need to
> define what "longer"
> really is, 100uS?  300uS?  1mS? 5mS?
-----
Assuming typical TC frequency range Fo=30kHz...300
kHz,number of a ring-up cycles in correspondence with
arc growth speed and its energy expenditures was
addressed in first place.
Times of ring-up excitation refered alone (like 1ms
,2ms etc)are pretty much irrelevant without waveform
parameters specified.
To put it simply,for a given coil,neither too long nor
too short ring-up times are optimum ones for max spark
lenght.
Even in single shot experiment and with zero primary
losses.
-----

  The old SSTCs
> took maybe 2-3mS
> to develop the full streamer and they produce sparks
> far shorter than
> a DRSSTC
<snip>
-----
Due to too long rise times and number of cycles in
ring-up...
Over 100 cycles in a duty cycles are far from being
optimum  I guess.
-----

  It seems that faster rise times produce
> better sparks from
> my experiences (but i only have experiences to go
> by).
-----
Why?Define what do you  consider the faster rise time
in the case of your coil.
-----

>  > There must be optimum choice(s) between these two
>  > factors affecting performance for every separate
>  > system under consideration.
>
> Yes, i agree with that.  This is what Terry's
> program is all about i think ;-).
>
> Steve
-----
Bottom line is that I feel that power delivery to
secondary arc isn't exclusively  the only parameter
for every system that affects max spark output given
BPS rate.The most important factor  still remains the
power however,I agree.

All the Best,
Boris