Re: Why do primaries get hot?

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

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
> 
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
> 
> Antonio -
> 
> You say average current is zero. How did you find the average current for a
> 100 amp (square wave?) pulse lasting 10 us at each 10 ms (100 pulses per
> second) is 0.1 amps and the RMS current is 10 amps.
> 
> I get (100 amps x .00001 secs) = .001 amp sec for each pulse
> and   (.001 x 100 pulses) = 0.1 amps for the RMS current.

I don't understand your calculation.
I was considering a series of pulses, starting from zero. 
10 us in 10 ms is 1/1000 duty cycle. 
The average value is then 100/1000=0.1. 
The RMS value is sqrt(100^2/1000)=3.16. 
Oops... I forgot the square root.

Antonio Carlos M. de Queiroz