Question

A three phase, 10 pole, delta connected induction motor is supplied at440V, 50 Hz. It draws a current of 32A with a power factor of 0.81lagging. The motor runs at 575 RPM. Total stator, Rotor copper and mechanical losses equate to 3, 4 and 7%of the input power. Determine each of the following: The slip The efficiency of the motor The torque developed in the rotor The shaft output torque. Sketch and label the motor power flow chart for the motor described in this question. You answer must clearly identify the input power, output power and power losses.

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