Answer to Question #174866 in Electrical Engineering for Aswin

Question #174866

The full-load efficiency of a 400 V, 3-phase, 6 pole induction motor is 85%. It draws a line current of 80 A at 0.8 power factor lagging when it delivers full-load at 5% slip. Calculate the shaft output and shaft torque.


1
Expert's answer
2021-04-01T01:09:11-0400

The power of the motor is



The mechanical power output is



The synchronous frequency of a 6-pole motor is 1000 min-1, which corresponds to angular

velocity of


The angular velocity of the shaft is


The shaft torque:


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