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Author does nominal input power=RMS
Tom J
Organiser: South Wales
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Registered: 8th Sep 03
Location: Bridgend
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23rd Nov 03 at 21:56   View User's Profile U2U Member Reply With Quote
as above please
Richie
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Registered: 3rd Dec 02
Location: Newport, Wales
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23rd Nov 03 at 21:57   View User's Profile U2U Member Reply With Quote
indeed it does
Tom J
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Registered: 8th Sep 03
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23rd Nov 03 at 21:59   View User's Profile U2U Member Reply With Quote
ta
Tom J
Organiser: South Wales
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Registered: 8th Sep 03
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23rd Nov 03 at 22:18   View User's Profile U2U Member Reply With Quote
Root mean square (rms) is, literally, the square root of the mean of the square of a value. It is a process for calculating an average value for a fluctuating value (such as ac voltage or current.) The term rms power is referred to as the average power. A power amplifier rated as having "200 watts rms power" really puts out 200 watts of continuous sine wave power
found a definition
cdcool1
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Registered: 9th Jun 02
Location: Scunny
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24th Nov 03 at 17:47   View User's Profile U2U Member Reply With Quote
i'm sure i've seen that in one of my lectures

also, to get peak, or max power, multiply rms power by 1.4 (multiplying by the square root of 2 is more accurate but 1.4 is close enough)



[Edited on 24-11-2003 by cdcool1]
kev_corsa
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Registered: 7th Nov 02
Location: Newport, Uni in Bristol
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24th Nov 03 at 22:09   View User's Profile U2U Member Reply With Quote
yep, or peak to peak power (as in from the trough of a sine wave to the peak) its the square root of 2 multiplied by 2
kev_corsa
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Registered: 7th Nov 02
Location: Newport, Uni in Bristol
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24th Nov 03 at 22:31   View User's Profile U2U Member Reply With Quote
you cant really have an average power because the two halves of the sine wave would cancel each other out and the resultant would be zero. thats why the use the root mean square (rms)

[Edited on 27-11-2003 by kev_corsa]

 
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