A 440 V , 25 hp , 4 - pole , Y - connected three - phase wound - rotor induction motor has the following circuit parameters : R1 = 0.460 , R2 = 0.33 0 , x1 = 1.1 0 , x2 = 0.46 02 , and Xm = 25 22. ( stator referred ) Rotational losses ( including core loss ) = 500 W ( constant ) . If the terminal voltage and supply frequency are simultaneously reduced to 50 % , calculate the stator current , the developed air - gap torque , and the maximum torque at a slip of 0.04 .
A 440 V , 25 hp , 4 - pole , Y - connected three - phase wound - rotor induction motor has the following circuit parameters : R1 = 0.460 , R2 = 0.33 0 , x1 = 1.1 0 , x2 = 0.46 02 , and Xm = 25 22. ( stator referred ) Rotational losses ( including core loss ) = 500 W ( constant ) . If the terminal voltage and supply frequency are simultaneously reduced to 50 % , calculate the stator current , the developed air - gap torque , and the maximum torque at a slip of 0.04 .
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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A 440 V , 25 hp , 4 - pole , Y - connected three - phase wound - rotor induction motor has the following circuit parameters : R1 = 0.460 , R2 = 0.33 0 , x1 = 1.1 0 , x2 = 0.46 02 , and Xm = 25 22. ( stator referred ) Rotational losses ( including core loss ) = 500 W ( constant ) . If the terminal voltage and supply frequency are simultaneously reduced to 50 % , calculate the stator current , the developed air - gap torque , and the maximum torque at a slip of 0.04 .
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