Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
1. A 3- phase, 8- pole, design C, induction motor, rated at 874 r/min, 30 hp. 60 Hz, 460 V, operating at reduced load, has a shaft speed of 880 r/min, the combined stray power loss, windage loss, and friction loss is 350 W. The motor parameters in ohms per phase referred to the high side are: R, = 0.1891 X, = 1.338 R, = 0.191 X, = 0.5735 X= 14.18 R= 189.1 %3D Determine: a) motor input impedance per phase b) line current c) active (real), reactive, and apparent power and power factor

1. A 3- phase, 8- pole, design C, induction motor, rated at 874 r/min, 30 hp. 60 Hz, 460 V, operating at reduced load, has a shaft speed of 880 r/min, the combined stray power loss, windage loss, and friction loss is 350 W. The motor parameters in ohms per phase referred to the high side are: R, = 0.1891 X, = 1.338 R, = 0.191 X, = 0.5735 X= 14.18 R= 189.1 %3D Determine: a) motor input impedance per phase b) line current c) active (real), reactive, and apparent power and power factor

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
Question
1. A3- phase, 8- pole, design C, induction motor, rated at 874 r/min, 30 hp, 60 Hz, 460 V, operating at reduced load, has a shaft speed of 880 r/min, the combined stray power loss, windage loss, and friction loss is 350 W. The motor parameters in ohms per phase referred to the high side are: R, = 0.1891 X, = 1.338 R, = 0.191 X, = 0.5735 X= 14.18 R. = 189.1 Determine: a) motor input impedance per phase b) line current c) active (real), reactive, and apparent power and power factor d) equivalent rotor current e) stator conductor (copper) loss f) rotor conductor (copper) loss g) core loss h) air-gap power i) mechanical power developed j) developed torque k) shaft horsepower 1) shaft torque m) efficiency n) sketch the power- flow diagram and enter all data o) the expected minimum locked- rotor torque, breakdown torque, and pull- up torque (use appropriate tables for design C. Tables are provided for your convenience. Hint: To solve this problem you should use equivalent series- parallel model of an induction motor with all the parameters referred to the stator. Important notes: 1. Rated speed and power are given as well as actual shaft speed. You should use actual speed to solve the problem (items a – n) 2. The last question, item (o), deals with various torques as % of rated torque (as indicated by enclosed tables). Prior to using tables, you should find rated torque based on rated speed and rated power.
Transcribed Image Text:1. A3- phase, 8- pole, design C, induction motor, rated at 874 r/min, 30 hp, 60 Hz, 460 V, operating at reduced load, has a shaft speed of 880 r/min, the combined stray power loss, windage loss, and friction loss is 350 W. The motor parameters in ohms per phase referred to the high side are: R, = 0.1891 X, = 1.338 R, = 0.191 X, = 0.5735 X= 14.18 R. = 189.1 Determine: a) motor input impedance per phase b) line current c) active (real), reactive, and apparent power and power factor d) equivalent rotor current e) stator conductor (copper) loss f) rotor conductor (copper) loss g) core loss h) air-gap power i) mechanical power developed j) developed torque k) shaft horsepower 1) shaft torque m) efficiency n) sketch the power- flow diagram and enter all data o) the expected minimum locked- rotor torque, breakdown torque, and pull- up torque (use appropriate tables for design C. Tables are provided for your convenience. Hint: To solve this problem you should use equivalent series- parallel model of an induction motor with all the parameters referred to the stator. Important notes: 1. Rated speed and power are given as well as actual shaft speed. You should use actual speed to solve the problem (items a – n) 2. The last question, item (o), deals with various torques as % of rated torque (as indicated by enclosed tables). Prior to using tables, you should find rated torque based on rated speed and rated power.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 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.
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