Re: Joules

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

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

the easy way to calculate energy in a cap for tesla coiling is to not play 
with really large and small numbers at all. 

energy (J) = (kilovolts squared times uF) /2 

let's pretend what a 0.05uF cap charging off a 15kV transformer can store. 

peak voltage = 1.4 * 15 = 21kV. the cap can charge to a peak of 21kV. 

so 21 * 21 = 441
now multiply by 0.05  you don't even need a calculator- just divide by 20. 
now we have 441*0.05 = 22.05. Divide that by 2. So we now we know that the 
cap can store upto 11J, and you did not even have to play with lots of 
decimal places. 

KEN 

 

Tesla list writes: 

> Original poster: "Jeff Kamla by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jeffk-at-sinclair-dot-net> 
> 
> Hi  All 
> 
>   can someone tell me what the formula is  to convert voltage and
> capacitance to Joules. 
> 
>                thanks.                    jeff...... 
> 
>  
>