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NOTES ON PHASORS - gatech.edu

Chapter 1. NOTES ON PHASORS . Time-Harmonic Physical Quantities Time-harmonic analysis of physical systems is one of the most important skills for the electrical engineer to develop. Whether the application is power transmission, radio communications, data signaling, or laser emissions, the analysis of a physical system often requires physical quantities as either a single sinusoid or a superposition of multiple sinusoids. The most valuable analytical tool for studying sinusoidal physical quantities is the phasor transform. Motivation for PHASORS There are many types of transforms in engineering and all of them have one thing in common: they are used to simplify physical calculations. The phasor transform is no di erent. It replaces a time-harmonic physical quantity with a single complex constant that can be manipulated more easily by the engineer. A time-harmonic function is any physical quantity that is a sinusoidal function of time.

of multiple sinusoids. The most valuable analytical tool for studying sinusoidal physical quantities is the phasor transform. 1.1.1 Motivation for Phasors There are many types of transforms in engineering and all of them have one thing in common: they are used to simplify physical calculations. The phasor transform is no different.

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