Re: Coupling vs secondary voltage chart

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Original poster: boris petkovic <petkovic7@xxxxxxxxx>


Hi Malcolm,


> One system I took
> to critical coupling required elevating the
> secondary more than 3
> feet above the primary. Also, power transfer is
> getting pretty lossy
> at critical coupling as the inherent coil losses
> become significant.
> The possible voltage maximum would be less at
> critical coupling
> because of these losses. Consider: an ideal
> (lossless) transformer is
> always depicted with k = 1.
-----
Thought I have been pondering over the years  :Is it
always true that the longest arcs from disruptively
operated TC must be the ones that dissipate the
highest power?

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.
On the other hand,as you said,too low coupling results
in primary spark gap (or IGBT),and primary in general
,chewing up more percentage of the available power.
There must be optimum choice(s) between these two
factors affecting performance for every separate
system under consideration.

regards,
Boris