Re: RMS (Re: Why do primaries get hot?)

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

> 
> > say, 0.01 uF,253 uH (100 kHz)  pk current is around 100 Amps..
> > Assume loaded Q is around 2, so current falls off to 37 Amps in 2 cycles,
> > or 20 microseconds.  Assume we do this every 8 milliseconds (each half
> > cycle, rounding to make math easier).. The duty cycle is roughly, then,
> > 20/8000 or 1/400.
> 
>         Concur, sort of.
>         I suggest that the use of 'duty cycle' can be iffy EXCEPT in
>         pure pulse systems.  With resonant systems (all TC are, more or
>         less) the quasi sinusoidal waveforms are EVERY where.
> 
>         (A nice, computing scope, capable of doing Real Power on the
>         fly, or true RMS reading ammeter & voltmeter & power factor
>         set up...)
> 

Exactly... but, to a rough order of magnitude, it's correct.. Figuring
total energy in the whole "bang" would be comparable to a rectangular pulse
lasting 2 cycles...