Friday, 19 July 2013

Animated phasors of an induction motor (Torque-speed curve)


PHASOR DIAGRAM OF THE INDUCTION MOTOR


The steady-state characteristics of an induction motor are described by means of phasors which are computed using the standard equivalent circuit and are then plotted in the complex plane in a speed range from standstill to synchronous. The input voltage (black) is chosen as reference; the stator and rotor currents and the stator and rotor fluxes are shown. The trajectories of these phasors are seen to approximate portions of circles. The corresponding torque-speed curve is also plotted.




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