Wednesday, October 29, 2014

Question Paper of Anna University of Technology Coimbatore, EE52 Electrical Machines - II Fifth Semester B.E EEE April May 2011

ANNA UNIVERSITY OF TECHNOLOGY, COIMBATORE

B.E./B.TECH. DEGREE EXAMINATION, April/May 2011

FIFTH SEMESTER - EEE

ELECTRICAL MACHINES II

Time : Three hours Maximum : 100 Marks

Answer ALL Questions

PART A - (20 X 2 = 40 Marks)

1. Name the main parts of synchronous generator.

2. Write down the EMF equation of alternator.

3. Define regulation of alternator. '

4., Name the different methods of determining the voltage regulation of synchronous generator.

5. Synchronous motor always runs at synchronous speed why?

6. What is hunting?

7. What are V-curves?

8. What are the uses of damper winding in a synchronous motor?

9. How will you change the direction of rotation of three phase induction motor?

10. What is Slip?

11. List the application of slip ring induction motor?

12. Why an induction motor is called asynchronous motor?

13. What is the disadvantages of dynamic braking of an induction motor?

14. What is eddy current loss?

15. How does the slip vary with load?

16. Is it possible to start 3-phase slip ring induction motor on load?

17. What kind of motor is used in a mixie?

18. In which direction does a shaded pole induction motor run?

19. Why single phase induction motor has low power factor?

20. .What do you mean by split phase motor?

PART B (5 x 12 = 60 Marks)

Answer any five questions

21. Explain the double field revolving theory for Operation Of Single Phase induction motor.

22. Explain the principles of operation and applications of repulsion motor and hysteresis motor.

Duraimani

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