Re: Bang size V BPS

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

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Paul,

I think the larger cap size systems have lower losses due to skin effects 
(lower Fo frequencies), better quenching, lower primary currents (I^2R 
heating) and are less likely to blow transformers and caps.  If both 
systems are well designed, I think the lower frequency system will do 
better, but the difference may be small.  You may be interested in the 
following paper if you have not seen it already that has some system losses 
in it.

http://hot-streamer-dot-com/TeslaCoils/MyPapers/modact/modact.html

Cheers,

         Terry

At 11:05 AM 10/31/2002 +1000, you wrote:
>I have been experimenting with different break rates, ballasts and primary 
>capacitance values using PSpice simulations on the PC. It's possible to 
>get the same energy transfer over one cycle to the primary capacitor by 
>either using a small cap and high break rate or a larger capacitor with a 
>low break rate but more Joules per bang. For example a 56nF charged to 6.3 
>Joules at 550 BPS compared to a 70nF charged to 35.8 Joules at 100BPS 
>(50Hz supply) gives the same energy per cycle, I worked this out by 
>multiplying the individual bang size by the breaks per cycle. I am 
>assuming that the larger cap size is preferred, as the ratio of the 
>primary to the secondary capacitance is greater with a big bang to boot. 
>However with the low BPS the cap is charged to over twice the Voltage 
>adding greater stress (eg 32KV compared to 15KV in my case). What's the 
>general consensus on this?
>Paul A in Australia.