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How do you represent a phasor?
Key Concept: A sinusoidal signal can be represented by a vector in the complex plane called a phasor. A sinusoidal signal f(t)=A·cos(ωt+θ) can be represented by a phasor F=Aejθ, which is a vector in the complex plane with length A, and an angle θ measured in the counterclockwise direction.
What is the idea of using phasor?
Phasor Diagrams are a graphical way of representing the magnitude and directional relationship between two or more alternating quantities. Sinusoidal waveforms of the same frequency can have a Phase Difference between themselves which represents the angular difference of the two sinusoidal waveforms.
What is a phasor transform?
Then phasor notation or phasor transform as it is sometimes called, transfers the real part of the sinusoidal function: A(t) = Am cos(ωt ± Φ) from the time domain into the complex number domain which is also called the frequency domain.
What is the phase angle between the voltage and the current?
The phase difference is = 90 degrees. It is customary to use the angle by which the voltage leads the current. This leads to a positive phase for inductive circuits since current lags the voltage in an inductive circuit.
What are phasors in AC circuits?
Phasors are quantities that have both magnitude and direction. Phasor notation is a convenient method for representing sine waves in AC circuits. For example, a sine-wave voltage can be represented as V =V∠ϕ, where V is the RMS magnitude and ϕ is the phase angle.
What is line current and phase current?
Line current is the current that is flowing from an AC supply and Phase current is the current that is flowing through each phase in the system. In a star system the line current is equal to the phase current (IL = IP) in a delta system, the line current is divided by 1.732 to get the phase current ( IP = IL/1.732)