A 220V DC series motor derives a load certain speed load and it takes a current of. Botharmature and field resistances are equal to 0.75Ω. The speed needs to be reduced by 70%by making some amendments in the motor circuit. One possible design is adding an extraresistance in series with a motor circuit. In this design, torque is not remained constant andis proportional to the square of the speed of the motor. (a) Estimate this extra resistance. Draw the amended circuit diagram. (b) Also suggest any other possible design ( with circuit diagram) to reduce the speed as torqueremains constant. (c) Is there any risk to start this machine without load without any amendment? If yes, pleaseexplain.
A 220V DC series motor derives a load certain speed load and it takes a current of. Botharmature and field resistances are equal to 0.75Ω. The speed needs to be reduced by 70%by making some amendments in the motor circuit. One possible design is adding an extraresistance in series with a motor circuit. In this design, torque is not remained constant andis proportional to the square of the speed of the motor. (a) Estimate this extra resistance. Draw the amended circuit diagram. (b) Also suggest any other possible design ( with circuit diagram) to reduce the speed as torqueremains constant. (c) Is there any risk to start this machine without load without any amendment? If yes, pleaseexplain.
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
THIS QUESTION IS FROM BOOK ELECTRIC MACHINE 1 FROM TOPIC DC MOTOR
A 220V DC series motor derives a load certain speed load and it takes a current of. Botharmature and field resistances are equal to 0.75Ω. The speed needs to be reduced by 70%by making some amendments in the motor circuit. One possible design is adding an extraresistance in series with a motor circuit. In this design, torque is not remained constant andis proportional to the square of the speed of the motor.
(a) Estimate this extra resistance. Draw the amended circuit diagram.
(b) Also suggest any other possible design ( with circuit diagram) to reduce the speed as torqueremains constant.
(c) Is there any risk to start this machine without load without any amendment? If yes, pleaseexplain.
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 2 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
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,