Re: TC RMS Conditions - was Voltage/Length etc. (fwd)

To: tesla-at-pupman-dot-com
Subject: Re: TC RMS Conditions - was Voltage/Length etc. (fwd)
From: Tesla List <mod1-at-pupman-dot-com>
Date: Fri, 13 Feb 1998 21:29:57 -0700 (MST)
Approved: mod1-at-pupman-dot-com

---------- Forwarded message ----------
Date: Thu, 12 Feb 1998 20:45:45 -0800
From: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: TC RMS Conditions - was Voltage/Length etc. (fwd)

John H. Couture wrote:

>   The RMS conditions for AC electrical circuits covers a lot of territory
> and I can cover only part of the story. I will start with a comment on RMS
> conditions of the 60 HZ currents that are normally used for the inputs of a
> Tesla coil. This current is a continuous sine wave current that has a RMS
> current value equal to .7071 of the peak current. The RMS current times the
> RMS voltage gives an RMS power. The energy in joules is equal to the RMS
> power in watts x seconds. These RMS conditions are also called stedy state
> conditions.

Plase do not use the term RMS in this context. RMS means simply "the square
root of the mean square", and is a form of computing the equivalent DC voltage
of current that would produce the same power dissipation over a resistor.
It has no relation with waveform. If you want to talk about sinusoidal signals
use the correct name "sinusoidal steady-state".
Note also that the mean power (there is no "RMS power") transferred by sinusoidal
signals is:
P=V*I*cos(angle between V and I), with V and I being RMS values (peak value/sqrt(2)).
The frequencies must be equal, otherwise the mean power is always zero.

>   The secondary voltage is  equal to   Vs = sqrt(2Js/Cs)

What is Js?

Antonio Carlos M. de Queiroz
mailto:acmq-at-compuland-dot-com.br
http://www.coe.ufrj.br/~acmq