Finding Full Load Current & Torque in Induction Motors

[ranju]

In an induction motor problem , I need to find the full load current & torque..for that I calculated the impedance with given data..& I got the impedance in polar form..But in the solution for finding the full load current they put only the magnitude of the impedance & not the phase..! I didn't get the reason actually ..maybe I'm missing some concept..Is it so that since we are calculating full-load current so only magnitude of the impedance matters & not its phase?.

 

[Delta2]

It is when we calculate the amplitude of current we take into account the magnitude of impedance. So the amplitude(maximum value) of the full load current depends only on the magnitude of the impedance.

The phase at which the current lags the applied voltage is equal to the phase of the impedance.