Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
The name-plate of a squirrel-cage induction motor has the following information: Rated power: 25 hp; Number of poles: 4; Rated voltage: 400 V; Rated frequency: 50 Hz; Rated speed: 1480 rpm. The motor has a stator winding resistance of 0.05 0, a rotor winding resistance of 0.09 2 referred to the stator, a stator leakage inductance of 2 mH, a rotor leakage inductance of 2 mH referred to the stator and a magnetizing inductance of 55.2 mH. (a) Calculate the synchronous speed of the motor. (b) Calculate the stator current and its power factor when the motor runs at rated speed. (c) Calculate the efficiency of the motor when it runs at rated speed and delivers rated output power. (d) Calculate the shaft torque when the motor runs at rated speed and delivers rated output power. Gull (e) At what speed will the motor develop maximum torque? (1) Calculate the stator current and its power factor if the motor develops maximum torque Note only need answers for part (d), (e) and (1)

The name-plate of a squirrel-cage induction motor has the following information: Rated power: 25 hp; Number of poles: 4; Rated voltage: 400 V; Rated frequency: 50 Hz; Rated speed: 1480 rpm. The motor has a stator winding resistance of 0.05 0, a rotor winding resistance of 0.09 2 referred to the stator, a stator leakage inductance of 2 mH, a rotor leakage inductance of 2 mH referred to the stator and a magnetizing inductance of 55.2 mH. (a) Calculate the synchronous speed of the motor. (b) Calculate the stator current and its power factor when the motor runs at rated speed. (c) Calculate the efficiency of the motor when it runs at rated speed and delivers rated output power. (d) Calculate the shaft torque when the motor runs at rated speed and delivers rated output power. Gull (e) At what speed will the motor develop maximum torque? (1) Calculate the stator current and its power factor if the motor develops maximum torque Note only need answers for part (d), (e) and (1)

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter8: Basic Electric Motors
Section: Chapter Questions
Problem 28RQ: What are the advantages and disadvantages of using the following types of motors? shaded-pole...
See similar textbooks
icon
Related questions
Question
100%
The name-plate of a squirrel-cage induction motor has the following information: Rated power: 25 hp; Number of poles: 4; Rated voltage: 400 V; Rated frequency: 50 Hz; Rated speed: 1480 rpm. The motor has a stator winding resistance of 0.05 0, a rotor winding resistance of 0.09 2 referred to the stator, a stator leakage inductance of 2 mH, a rotor leakage inductance of 2 mH referred to the stator and a magnetizing inductance of 55.2 mH. (a) Calculate the synchronous speed of the motor. (b) Calculate the stator current and its power factor when the motor runs at rated speed. (c) Calculate the efficiency of the motor when it runs at rated speed and delivers rated output power. (d) Calculate the shaft torque when the motor runs at rated speed and delivers rated output power. Gull (e) At what speed will the motor develop maximum torque? (1) Calculate the stator current and its power factor if the motor develops maximum torque Note only need answers for part (d), (e) and (1)
Expert Solution
steps

Step by step

Solved in 3 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Three phase Induction Motor
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
Electricity for Refrigeration, Heating, and Air C…
Electricity for Refrigeration, Heating, and Air C…
Mechanical Engineering
ISBN:
9781337399128
Author:
Russell E. Smith
Publisher:
Cengage Learning
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS