Wednesday, October 29, 2014

Question Paper of Anna University Chennai, EE52 Electrical Machines - II Fifth Semester B.E EEE November December 2011

ANNA UNIVERSITY

B.E./B.TECH. DEGREE EXAMINATION, November/December 2011

FIFTH SEMESTER : EEE

ELECTRICAL MACHINES II

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A - (10 X 2 = 20 Marks)

1. What do you mean by single layer and double layer winding?

2. What are the various function of damper winding provided with alternator?

3 What is a synchronous capacitor?

4. What are V-curves?

5. What are the rotor slots of a 3-phase induction, motors skewed?

6. Define slip of induction motor.

7. State the effect of rotor resistance on starting torque.

8. What are the various method of speed control of 3-phase induction motor

9. What type .of motor is used for ceiling fan?

10. State the application of shaded pole motor.

PART B (5 X 16 = 80 MARKS)

11. a. i) Derive from first principle, the emf of 3-phase alternator. (8)

ii) The following open circuit and short circuit test are made on a 6000 kVA, 6600 V, star connected, 2-pole; 60 Hz turbine driven alternator. If I = 125 A, at open circuit terminal voltage = 8200 V with armature short circuited I = 125 A (line). At the rated load and upf armature loss is 1.5%.of output.

Determine the percentage regulation at rated load and 0.8 p.f. lag. (8)

b. 1) Explain how will you determine the d and q-axis reactance of a synchronous machine in your laboratory. (3)

ii) For the salient synchronous machine, derive the expression for power developed as a function of load angle. (3)

Duraimani

B.E Civil Engineer Graduated from Government College of Engineering Tirunelveli in the year 2016. She has developed this website for the welfare of students community not only for students under Anna University Chennai, but for all universities located in India. That's why her website is named as www.IndianUniversityQuestionPapers.com . If you don't find any study materials that you are looking for, you may intimate her through contact page of this website to know her so that it will be useful for providing them as early as possible. You can also share your own study materials and it can be published in this website after verification and reviewing. Thank you!