Q2// Answer the following questions. P2 1- The power rotor input of 3-phase, 60 Hz, 4-pole induction motor is 120 kW at 3 Hz. rota Pm If stator copper loss of 3 KW, a mechanical losses of 2KW, and a stator core losses of 1.7 KW, calculate the rotor copper losses and efficiency of motor. 2- A 440 V, 50 Hz, 4-pole, 3-phase, star-connected induction motor running at 1440 rpm on full load has a slip ring rotor of resistance 0-01 ohm and standstill reactance of 0.167 ohm per phase. Calculate the ratio of full load torque to maximum torque.

Q2// Answer the following questions. P2 1- The power rotor input of 3-phase, 60 Hz, 4-pole induction motor is 120 kW at 3 Hz. rota Pm If stator copper loss of 3 KW, a mechanical losses of 2KW, and a stator core losses of 1.7 KW, calculate the rotor copper losses and efficiency of motor. 2- A 440 V, 50 Hz, 4-pole, 3-phase, star-connected induction motor running at 1440 rpm on full load has a slip ring rotor of resistance 0-01 ohm and standstill reactance of 0.167 ohm per phase. Calculate the ratio of full load torque to maximum torque.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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