“phasor”的概念、定义、翻译、参考文献-科学参考

phasor

Physics

A rotating vector that represents a sinusoidally varying quantity. Its length represents the amplitude of the quantity and it is imagined to rotate with angular velocity equal to the angular frequency of the quantity, so that the instantaneous value of the quantity is represented by its projection upon a fixed axis. The concept is convenient for representing the phase angle between two quantities; it is shown on a diagram as the angle between their phasors.

Electronics and Electrical Engineering

A 2D-vector, or complex number, that denotes the magnitude and phase of a sinusoidal signal. A signal of magnitude A, with an angular frequency ω, and initial phase shift θ, is represented by the equation
$A e^{i (ω t + θ)}$
and the corresponding phasor is $A e^{i θ}$ , or alternatively takes the form x + jy where $A = \sqrt[2]{x^{2} + y^{2}}$ and $sin θ = y / A$ . If given signals are all at the same frequency, but with differing amplitudes and phases, then vector addition of their phasors corresponds to timewise addition of their waveforms, and multiplication of a phasor by a scalar corresponds to the waveform being amplified or attenuated by the amount of that scalar.

单词	phasor
释义	phasor Physics A rotating vector that represents a sinusoidally varying quantity. Its length represents the amplitude of the quantity and it is imagined to rotate with angular velocity equal to the angular frequency of the quantity, so that the instantaneous value of the quantity is represented by its projection upon a fixed axis. The concept is convenient for representing the phase angle between two quantities; it is shown on a diagram as the angle between their phasors. Electronics and Electrical Engineering A 2D-vector, or complex number, that denotes the magnitude and phase of a sinusoidal signal. A signal of magnitude A, with an angular frequency ω, and initial phase shift θ, is represented by the equation $A e^{i (ω t + θ)}$ and the corresponding phasor is $A e^{i θ}$ , or alternatively takes the form x + jy where $A = \sqrt[2]{x^{2} + y^{2}}$ and $sin θ = y / A$ . If given signals are all at the same frequency, but with differing amplitudes and phases, then vector addition of their phasors corresponds to timewise addition of their waveforms, and multiplication of a phasor by a scalar corresponds to the waveform being amplified or attenuated by the amount of that scalar.
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