25-hp 230-volt 1,200 rpm shunt motor has an armature resistance, including brushes of 0.2 ohms, and the armature current is 92 amp when the machine is operating at rated load and speed. To reduce the speed, a 6.8 ohms resistance is shunted across the armature, and a resistance of 1.6 ohms is connected in series with the parallel combination of the armature and shunted resistor. If under the latter conditions, the armature current is 20 amp, calculate the speed of the motor. Assume that there is no flux change—Ans.: 888 rpm.
25-hp 230-volt 1,200 rpm shunt motor has an armature resistance, including brushes of 0.2 ohms, and the armature current is 92 amp when the machine is operating at rated load and speed. To reduce the speed, a 6.8 ohms resistance is shunted across the armature, and a resistance of 1.6 ohms is connected in series with the parallel combination of the armature and shunted resistor. If under the latter conditions, the armature current is 20 amp, calculate the speed of the motor. Assume that there is no flux change—Ans.: 888 rpm.
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...
Related questions
Question
A 25-hp 230-volt 1,200 rpm shunt motor has an armature resistance, including brushes of 0.2 ohms, and the armature current is 92 amp when
the machine is operating at rated load and speed. To reduce the speed, a
6.8 ohms resistance is shunted across the armature, and a resistance of
1.6 ohms is connected in series with the parallel combination of the
armature and shunted resistor. If under the latter conditions, the armature
current is 20 amp, calculate the speed of the motor. Assume that there is
no flux change—Ans.: 888 rpm.
show circuit diagram and step by step process
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,