|A 250 V de shunt motor takes a current of 30A on a certain load. R= 12 and Rah= www 125 Q. Find the resistance to be inserted in series with the armature to reduce the speed to 60% of its original value if the load torque is constant.

Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...
icon
Related questions
Question
I need a solution within 15 minutes
|A 250 V dc shunt motor takes a current of 30A on a certain load. R= 12 and Ra=
125 Q. Find the resistance to be inserted in series with the armature to reduce the
speed to 60% of its original value if the load torque is constant.
Transcribed Image Text:|A 250 V dc shunt motor takes a current of 30A on a certain load. R= 12 and Ra= 125 Q. Find the resistance to be inserted in series with the armature to reduce the speed to 60% of its original value if the load torque is constant.
Expert Solution
steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Knowledge Booster
Types of Semiconductor Material and Its Energy Band Analysis
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
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning