NESS ENGINEERING
TECHNICAL DATA
RMS AND AVERAGE VALUES FOR TYPICAL WAVEFORMS

 

Sine Wave  Full Wave Rectified  Half Wave Rectified AC Superposed on DC Periodic Half Sinusoids  Square Wave  Sawtooth Wave  Trapezoidal Wave

Standard Formula for Calculating RMS (Root Mean Square) Values for Waveform, I(t)
 

Equation for determining RMS value of a waveform

Current Wave Shape

Configuration

IRMS

IAVG

 Diagram for a sine wave RMS calculation

Sine Wave

Equation for a sine wave RMS calculation

0

 Diagram for a rectified sine wave RMS calculation

Full Wave Rectified Sine Wave

Equation for a rectified sine wave RMS calculation

0.637Ipk

 Diagram for a half wave RMS calculation

Half Wave Rectified Sine Wave

Equation for a half wave RMS calculation

0.318Ipk

 Diagram for a sine wave with dc offset RMS calculation

Direct Current with Superposed Sine Wave

Equation for a sine wave with dc offset RMS calculation

Idc

 Diagram for a repetitive half sinusoid RMS calculation

Half-Sinusoids of T Duration and f Repetition Frequency

Equation for a repetitive half sinusoid RMS calculation

(2fIpkT)/p

 Diagram for a repetitive square wave RMS calculation

Square Waves of T Duration and f Repetition Frequency

Equation for a repetitive square wave RMS calculation

fIpkT

 Diagram for a repetitive sawtooth RMS calculation

Sawtooth Waveform of T Duration and f Repetition Frequency

Equation for a repetitive sawtooth RMS calculation

0.5fIpkT

 Diagrem for a repetitive trapezoidal RMS calculation

Trapezoidal Waveform of f Repetition Frequency

Equation for a repetitive trapezoidal RMS calculation></TD>
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fIpk(d+T)


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Ness Engineering, Inc.
P.O. Box 261501
San Diego, CA 92196
(858) 566-2372
(858) 240-2299 FAX

Richard M. Ness and Ness Engineering, Inc.
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