2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the friction and winding losses total 2 kW. If the slip of the motor is 4%, find (a) the mechanical power output (b) the rotor Cu loss per phase and (c) the efficiency. [(a) 37.74 kW (b) 0.42 kW (c) 89.4%] 3. The rotor e.m.f. of a 3-phase, 440-V, 4-pole, 50-Hz induction motor makes 84 complete cycles per minute when the shaft torque is 203.5 newton-metres. Calculate the h.p. of the motor. [41.6 h.p. (31.03 kW)] (City & Guilds, London)
2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the friction and winding losses total 2 kW. If the slip of the motor is 4%, find (a) the mechanical power output (b) the rotor Cu loss per phase and (c) the efficiency. [(a) 37.74 kW (b) 0.42 kW (c) 89.4%] 3. The rotor e.m.f. of a 3-phase, 440-V, 4-pole, 50-Hz induction motor makes 84 complete cycles per minute when the shaft torque is 203.5 newton-metres. Calculate the h.p. of the motor. [41.6 h.p. (31.03 kW)] (City & Guilds, London)
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.
Related questions
Question
![2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the friction
and winding losses total 2 kW. If the slip of the motor is 4%, find (a) the mechanical power output
(b) the rotor Cu loss per phase and (c) the efficiency.
[(a) 37.74 kW (b) 0.42 kW (c) 89.4%]
3. The rotor e.m.f. of a 3-phase, 440-V, 4-pole, 50-Hz induction motor makes 84 complete cycles per
minute when the shaft torque is 203.5 newton-metres. Calculate the h.p. of the motor.
[41.6 h.p. (31.03 kW)] (City & Guilds, London)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbda3ac01-158b-4675-99ac-f1acfe21548c%2F57cdb97d-fcd5-4742-a2ca-efc65c43492f%2Flm4z27o_processed.png&w=3840&q=75)
Transcribed Image Text:2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the friction
and winding losses total 2 kW. If the slip of the motor is 4%, find (a) the mechanical power output
(b) the rotor Cu loss per phase and (c) the efficiency.
[(a) 37.74 kW (b) 0.42 kW (c) 89.4%]
3. The rotor e.m.f. of a 3-phase, 440-V, 4-pole, 50-Hz induction motor makes 84 complete cycles per
minute when the shaft torque is 203.5 newton-metres. Calculate the h.p. of the motor.
[41.6 h.p. (31.03 kW)] (City & Guilds, London)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 4 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning