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On 2/17/14 12:40 PM, matty mcqueeney wrote:
Hi, I am in
the middle off my dissertation (University project), I was wanting to get the
correct answers for the questions below:
The spark
gap equation..... L = 1.7 x /Power of Nst.
That's not the breakdown voltage of a sparkgap, which is mostly
determined by the breakdown field of air (roughly 3MV/m)
The 1.7*sqrt(power) is an empirical relationship developed by list
member John Freau based on a bunch of observations of list members, etc.
Why do we use 1.7?? I have tried looking for this but
could not find a reasonable answer.
Also
When
the voltage/ current has been supplied from the transformer.... the Capacitor
is charging, when it reached maximum the Spark gap ionized air and strikes
which makes it a closed circuit.
what
is happening to the Spark gap when the capacitor is charging? why does it
strike? how is the spark created?
As the voltage across the gap rises, so does the electric field. When
the field exceeds, that for breakdown of air, the spark jumps. It's
actually a pretty complex phenomenon.
There
are lots of simple ways of saying it, but id like to know what is actually
happening.
Thanks
Matthew.
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