"TokaMundo" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Mon, 22 Aug 2005 21:37:03 -0400, "TimPerry"
> <(E-Mail Removed)> Gave us:
>
> >
> >"Polymath" <(E-Mail Removed)> wrote in message
> >news:(E-Mail Removed) roups.com...
> >> There isn't such a concept because the "M" in "RMS"
> >> stands for "Mean" - an averaging over a full cycle.
> >>
> >> Therefore it is meaningles to talk about instantaneous RMS
> >>
> >
> >given varying or fluctuating voltage or current it will have
instantaneous
> >values.
>
> But they are NOT referred to as "instantaneous RMS values". They
> are merely instantaneous readings.
this may be a minor quibble but as long as one properly defines the working
parameters so that another engineer or tecno understands what you mean it
might be very useful to "talk about instantaneous RMS values"
another example might be speaker power. a non-sinusoidal non-repetitive
waveform, whose power, voltage, and currents are measured in RMS values is
presented to a resistive + reactive load.
adding the designation "instantaneous" to peak power or peak voltage gives
it a precise meaning to wit: one defined point in time. (first time i've
used "to wit" in a sentence i think. just finished re-reading some sherlock
holmes stories)
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