The rotor of a 4-pole, 50 Hz, 3-phase slip-ring induction motor has a resistance of 0.252/phase and runs at 1440 r.p.m. on full-load. Calculate the external resistance per phase which must be added to lower the speed to 1200 r.p.m. , the torque remaining constant in both cases. Ans[ 12]
The rotor of a 4-pole, 50 Hz, 3-phase slip-ring induction motor has a resistance of 0.252/phase and runs at 1440 r.p.m. on full-load. Calculate the external resistance per phase which must be added to lower the speed to 1200 r.p.m. , the torque remaining constant in both cases. Ans[ 12]
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
Related questions
Question
![The rotor of a 4-pole, 50 Hz, 3-phase slip-ring induction motor has a resistance of 0.252/phase
and runs at 1440 r.p.m. on full-load. Calculate the external resistance per phase which must be
added to lower the speed to 1200 r.p.m. , the torque remaining constant in both cases. Ans[ 12]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcfb53d65-cfb3-4ba6-acd0-5dadf94aeb51%2F2de03a9a-704a-432c-88d6-c36321db9dc4%2F08bwpx_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The rotor of a 4-pole, 50 Hz, 3-phase slip-ring induction motor has a resistance of 0.252/phase
and runs at 1440 r.p.m. on full-load. Calculate the external resistance per phase which must be
added to lower the speed to 1200 r.p.m. , the torque remaining constant in both cases. Ans[ 12]
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
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 3 steps with 2 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
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
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
![Delmar's Standard Textbook Of Electricity](https://www.bartleby.com/isbn_cover_images/9781337900348/9781337900348_smallCoverImage.jpg)
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning