**From:** Doug Brooks (*doug@eskimo.com*)

**Date:** Tue May 29 2001 - 12:09:06 PDT

**Next message:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"**Previous message:**Neeraj Pendse: "Re: [SI-LIST] : RMS Definition"**Next in thread:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"**Maybe reply:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"

Sorry if I wasn't clear. I know what RMS means. What I am looking for is an

equation of the form

RMS = sqrt[integral(V^2Sin^2(theta))/n] with the correct integration

boundaries.

The table I am looking for might have entries like this:

sine Vrms = V/.707

Square Vrms = .5*V (If symmetrical around zero axis, then Vrms = V)

DC Vrms = V

Triangle Vrms = ?*V

Saw Tooth Vrms = ?*V

etc

Sorry for any confusion

Doug

Hi Gurus

I am looking for the mathematical formula for RMS voltage. I seem to

remember that it can be expressed as an integral of a squared function. I

can almost fake it(!) but I'd like to see the real thing! I would also like

to see a table of RMS values for different types of (non-sinusoidal)

waveforms (such as triangular, saw tooth, etc.) Can anyone point me to a

web page where this info might exist. Or perhaps, might someone create the

formula in an equation editor and e-mail it to me as an attachment.

Thanks for any help

Doug Brooks

***********************************************************

Doug Brooks' book, "Electrical Engineering for the Non-Degreed Engineer is

now in its 3rd printing. Learn about it at www.ultracad.com

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***********************************************************

Doug Brooks' book, "Electrical Engineering for the Non-Degreed Engineer is

now in its 3rd printing. Learn about it at www.ultracad.com

**** To unsubscribe from si-list or si-list-digest: send e-mail to

majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE

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**Next message:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"**Previous message:**Neeraj Pendse: "Re: [SI-LIST] : RMS Definition"**Next in thread:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"**Maybe reply:**Zabinski, Patrick J.: "RE: [SI-LIST] : RMS Definition, clarification"

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