Electrical Engineering ⇒ Topic : Applications of Phasor Algebra to A.C. Circuits

Nicholas
 
Applications of Phasor Algebra to A.C. Circuits We know that alternating voltages and currents are phasor quantities. Therefore, they can be expressed in the complex form e.g. rectangular, trigonometrical or polar form. The magnitude and phase angle of voltage or current can be readily obtained from its complex form. We shall now see how phasor algebra applied to a.c. circuits yields quick solution. While applying phasor algebra to a.c. circuits, the following points must be kept in mind (1) If circuit current is taken as the reference phasor (i.e. along OXaxis), then, I = I + j 0 It is because phasor lying along OXaxis has nof part. (2) If voltage is taken as the reference phasor (i. e. along OXaxis), then, V = V + j 0 (3) The angles of voltage or current are measured from OXaxis which is taken as the axis of reference. If the angle is measured in CCW direction from OXaxis, then it is considered a positive angle. If measurement is made in clockwise direction from OXaxis, the angle is considered negative. (4) Magnitudes of phasors (current or voltage) mean the r.m.s. values unless stated otherwise  
 
!! OOPS Login [Click here] is required for more results / answer