Cramster.com - Homework Solutions, Lecture Notes, Exams, and Free Online Homework Help
Sign Up Now! Login Customer Support Cramster Blog
McAfee Secure sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Problem Solved.
    Home    
    Homework Help    
   Answer Board   
    Resources (Beta)    
   
You Are Here: Home > Answer Board > Electrical Engineering > Topic: Asynchronous Machine
Member's Topic Headline:

Asynchronous Machine

Know the answer? Have a better solution? Share it.
Sign Up Now for FREE!
Join the thousands of students
getting ahead in their classes.
Member Testimonials

Question:

Advertisement:
Answer | Ask New Question | Customize Profile | Leaderboards | 
FAQ

Member's Avatar
Rookie
Karma Points: 0
Respect (25%):
Date Posted: 7/8/2008 8:37:20 AM  Status: Live
Asynchronous Machine
Course Textbook Chapter Problem
N/A N/A N/A N/A
Question Details:
   A  3 phase 20kw, 400v 50hz, 8pole induction motor has rotor resistance of .08Ω and standstill reactance of 0.4Ω.The effective stator/rotor turn ratio is 2.5/1. The motor is to drive a constant torque load of 250Nm. Neglect stator impedance.
(a)   Calculate the minimum resistance to be added in rotor circuit for the motor to start up on load.
(b)   At what speed would the motor run, if the added rotor resistance is (i) left in the circuit and (ii) subsequently short circuited.
 

Answers:

No one has answered this question yet.
Be the first to answer.  Earn up to 9 karma points. 
Answer Question
Redeem your points for Karma Points Rewards.


By reading or posting messages on these forums, you are agreeing to the Answer Board's Terms of Service and Conduct (TSC).


About Cramster | Terms of Use | Privacy Policy | Contact Us | Press Room | Site Map | Support | Anti-Cheating Policy

Cramster.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.
Copyright © 2008 Cramster, Inc.