A three-phase, 50-Hz, 6-pole induction motor develops a useful torque of 120 Nm at full-load, while the rotor frequency is 2 Hz. The torque lost due to friction and windage is 10 Nm. Calculate: 1.output power 2. rotational losses

A three-phase, 50-Hz, 6-pole induction motor develops a useful torque of 120 Nm at full-load, while the rotor frequency is 2 Hz. The torque lost due to friction and windage is 10 Nm. Calculate: 1.output power 2. rotational losses

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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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

A three-phase, 50-Hz, 6-pole induction motor develops a useful torque of 120 Nm at full-load, while the rotor
frequency is 2 Hz. The torque lost due to friction and windage is 10 Nm. Calculate:
1.output power

2. rotational losses

Expert Solution

Step 1

Given :

Pole = 6

Frequency =50 HZ

Useful Torque = 120 Nm

Rotor Frequency = 2 HZ

torque Lost = 10 Nm

SLip= F_r/ F_s

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