Wednesday, October 29, 2014

EE 1251 Electrical Machines II: Anna University B.E EEE 04th Semester April May 2014 Question Paper

Anna University, Chennai
B.E./B.Tech Degree Examination Apr/May 2010
Fourth Semster
Electrical and Electronics Engineering
EE 1251 - Electrical Machines - II
(Regulation 2004)
(Common to BE. (Part-Time) Third Semester - Electrical and Electronics Engineering
Regulation 2005)
Time ;' 3 hours marks I
Answer all questions
Part - A (10 x 2 = 20 marks)
1. Explain why an alternator with low value of Short Circuit Ratio has lower limit of stability.
2. What is the necessity for short chording the armature winding of synchronous machines?
3. What are the main .parts of synchronous motor?
4.  Mention the need for starters in synchronous motors.
5. At what value of slip does the torque developed is maximum?
6. Why the stator core of induction motor made of silicon content steel stamping"
7. Name the method of speed control used only for Sllp rmg induction motor.
8. What is the disadvantage of rotor rheostat speed control method?



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