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Unformatted text preview: es and currents. Handling of phasors requires familiarity with complex‐number arithmetic. (Self‐study for review) http://en.wikipedia.org/wiki/Complex_number As seen in earlier chapters on KVL and KCL, we need to add voltages and currents to solve a given DC circuit. However, when the voltage and current are sinusoidal, arithmetic becomes quite involved requiring repeated application of trigonometric substitutions. However, with phasors, the process is quite simplified. 80 EE1002 Introduction to Circuits and Systems Phasor Definition: Phasors are used to represent sinusoidal signals as complex numbers. For a sinusoidal voltage of v1 (t ) V1 cos(t ) , we define the phasor as V1 V11 . Thus, phasor of a sinusoid is a complex number having a magnitude equal to the peak value and having the same phase angle as the sinusoid. It is worth mentioning that in some conventions, the magnitude of phasor is taken to be the RMS value of the sinusoid instead of the peak value. It is important that the same convention is followed consistently. Phasor is just a definition. This gives rise to mathematical co...
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This document was uploaded on 01/20/2014.
- Winter '14