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Re: Now,How does a coil really work
At 06:24 AM 1/28/99 -0600, you wrote:
>Tesla List wrote:
snip.........>
>Mike,
>
>If the charging current is not high enough, or if the total gap length
>is set too widely you'll get "misses" as you attempt to increase the
>breakrate. This can occur for either a synchronous or asynchronous
>rotary gap. Generally, this will not be a problem except for the case
>where your tank cap and the effective inductance of your power source
>are resonant at the mains frequency, and your nominal breakrate is set
>to occur only once every half-cycle of incoming AC. If you "miss" under
>these conditions, resonant rise (at the mains frequency) may cause
>excessive voltage across either your tank cap or your HV transformer.
>Now most TC design programs size the tank cap size and NST so that they
>will resonate at the mains frequency, so this will place your NST at
>risk when using a rotary gap (especially an asynchronous one).
>
>-- Bert --
>
A properly set safety gap will protect this system very well. If the main
gap does not fire correctly or any of a number of other mishaps happen, a
safety gap will stop the high voltage and drain the energy safely from the
system. Just don't get carried away and set the safety gaps too far apart.
With higher and higher voltages available you can get longer and longer
arcs as you increase gap distances and such on a resonant rotary system.
That is, until something blows up!!
Terry
References: