Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
17. The power input to the rotor of a 440-V, 50-Hz, 3-phase, 6-pole induction motor is 60 kW. It is observed that the rotor e.m.f. makes 90 complete cycles per minute. Calculate (a) the slip (b) rotor speed (c) rotor Cu loss per phase (c) the mechanical power developed and (e) the rotor resistance per phase if rotor current is 60 A. [ (a) 0.03 (b) 970 r.p.m. (c) 600 W (d) 58.2 kW (e) 0.1670]

17. The power input to the rotor of a 440-V, 50-Hz, 3-phase, 6-pole induction motor is 60 kW. It is observed that the rotor e.m.f. makes 90 complete cycles per minute. Calculate (a) the slip (b) rotor speed (c) rotor Cu loss per phase (c) the mechanical power developed and (e) the rotor resistance per phase if rotor current is 60 A. [ (a) 0.03 (b) 970 r.p.m. (c) 600 W (d) 58.2 kW (e) 0.1670]

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
See similar textbooks
icon
Related questions
Question
I need the answer as soon as possible
17. The power input to the rotor of a 440-V, 50-Hz, 3-phase, 6-pole induction motor is 60 kW. It is observed that the rotor e.m.f. makes 90 complete cycles per minute. Calculate (a) the slip (b) rotor speed (c) rotor Cu loss per phase (c) the mechanical power developed and (e) the rotor resistance per phase if rotor current is 60 A. 18. An induction motor is running at 50% of the synchronous speed with a useful output of 41.03 kW [ (a) 0.03 (b) 970 r.p.m. (c) 600 W (d) 58.2 kW (e) 0.167 Q] and the mechanical losses total 1.492 kW. Estimate the Cu loss in the rotor circuit of the motor. If the stator losses total 3.5 kW, at what efficiency is the motor working ? [42.52 kW; 46.34%] (Electrical Engineering-II, Bombay Univ. 1975) 19. Plot the torque/speed curve of a 6-pole, 50-Hz, 3-phase induction motor. The rotor resistance and reactance per phase are 0.02 2 and 0.1 2 respectively. At what speed is the torque a maximum? What must be the value of the external rotor resistance per phase to give two-third of maximum
Transcribed Image Text:17. The power input to the rotor of a 440-V, 50-Hz, 3-phase, 6-pole induction motor is 60 kW. It is observed that the rotor e.m.f. makes 90 complete cycles per minute. Calculate (a) the slip (b) rotor speed (c) rotor Cu loss per phase (c) the mechanical power developed and (e) the rotor resistance per phase if rotor current is 60 A. 18. An induction motor is running at 50% of the synchronous speed with a useful output of 41.03 kW [ (a) 0.03 (b) 970 r.p.m. (c) 600 W (d) 58.2 kW (e) 0.167 Q] and the mechanical losses total 1.492 kW. Estimate the Cu loss in the rotor circuit of the motor. If the stator losses total 3.5 kW, at what efficiency is the motor working ? [42.52 kW; 46.34%] (Electrical Engineering-II, Bombay Univ. 1975) 19. Plot the torque/speed curve of a 6-pole, 50-Hz, 3-phase induction motor. The rotor resistance and reactance per phase are 0.02 2 and 0.1 2 respectively. At what speed is the torque a maximum? What must be the value of the external rotor resistance per phase to give two-third of maximum
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps with 5 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Coulomb's law
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.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS