A 3-phase, 8-pole, 100 hp squirrel cage induction motor (SCIM) is connected to a 50Hz 415V (line) supply. The stator copper and iron lossesare 5 KW, the rotor copper losses is 4 KW and the friction losses is 1 KW. Calculate motor efficiencya. 67%b. 86%c. 78%d. 73%e. 76%f. 88%8.65%h. 6996

Number of poles P = 8.Output of motor = 100 hp.Frequency f = 50 Hz.Line voltage Rotor copper loss…

Answered: A 3-phase, 8-pole, 10C are 5 KW, the…

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A 3-phase, 8-pole, 10C are 5 KW, the rotor ca a. 67% b. 86% c. 78% d. 73% e. 76% f. 88% g. 65% h. 6996

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

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

A 3-phase, 8-pole, 100 hp squirrel cage induction motor (SCIM) is connected to a 50Hz 415V (line) supply. The stator copper and iron losses
are 5 KW, the rotor copper losses is 4 KW and the friction losses is 1 KW. Calculate motor efficiency
a. 67%
b. 86%
c. 78%
d. 73%
e. 76%
f. 88%
8.65%
h. 6996

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