Thursday, December 15, 2016

EE6703 Special Electrical Machines Nov Dec 2016 Important Questions

Important questions / expected questions for Nov Dec 2016 EE6703 Special Electrical Machines examinations conducting by Anna University Chennai
07th Semester / VII Semester / IV Year
Electronics and Electronics Engineering
EE6703 Special Electrical Machines
(Regulation 2013)
Nov Dec 2016 Important Questions

Important 16 Marks / Part B Questions (All five units) are listed for EE6703 Special Electrical Machines Subject

1. (i) Generalize the expression for the torque equation for the synchronous reluctance motor. (8)
(ii) Investigate the performance of the synchronous reluctance motor with neat phasor diagram. (8)

2. Derive the voltage and torque equations of synchronous reluctance motor. (16)

3. (i) Discuss in detail about the construction and working of synchronous reluctance motor with
neat diagrams. (8)
(ii) Draw and explain phasor diagram with characteristics of synchronous reluctance motor. (8)

4. Describe the constructional features and operation of variable reluctance synchronous reluctance
motor. (16)

5. (i) Explain the steady state phasor diagram of synchronous reluctance motor. (8)
(ii) Derive the expression for d-axis synchronous reactance of a permanent magnet synchronous
reluctance motor. (8)

6. With a neat block diagram explain microprocessor control of stepping motor. (16)

7. (i) Explain with a neat diagram the multistack configuration in stepper motors. (8)
(ii) Explain the working of hybrid motor. (8)

8. Discuss dual voltage driver circuit for two phase on drive of a four phase stepper motor and explain the nature of current build up in dual voltage drive. (16)

9. (i) Explain microprocessor based control of stepper motor with an example. (12)
(ii) What are the advantages of closed loop control of stepper motor? (4)

10. Construct and evaluate the operation of single stack and multi-stack stepper motor with a neat
diagram. (16)

11. Explain the closed loop control analysis of switched reluctance motor. (16)

12. Discuss the following in switched reluctance motor
(i) Methods of rotor position sensing (8)
(ii) Sensorless operation.

13. Explain with a neat diagram the constructional details and working of rotary switched reluctance
motor. (16)

14. (i) Explain the torque -speed characteristics of switched reluctance motors. (8)
(ii) Derive the expressions for voltage and torque of SR machines. (8)

15. (i) Explain the shaft position sensing of SR motor. (8)
(ii) Explain the nonlinear analysis of SRM. (8)

16. Illustrate B-H hysteresis loop of permanent magnet material. (16)

17. Discuss in detail about magnetic circuit analysis of PMBLDC motor. Also draw its characteristics. (16)

18. Write a note on power controllers used for PMBLDC motor and explain the each blocks
associated in it. (16)

19. (i) Explain the speed-torque characteristics of PMBLDC motor. (8)
(ii) Differentiate between Mechanical and Electronic Commutators. (8)

20. (i) Derive an expression for permeance coefficient for PMBLDC motor. (12)
(ii) State the advantages of BLPM DC motor over conventional DC motor. (4)

21. Explain the construction and working principle of operation of PMSM. (16)

22. Derive the torque and EMF equations of PMSM. (16)

23. Deduce the expression for synchronous reactance of PM synchronous motor. (16)

24. Draw and explain the phasor diagram of PMSM. (16)

25. With necessary phasor diagram and circle diagram, describe the torque speed characteristics of
PMSM. (16)

For related study materials such as Previous Years Question Papers, Subject Notes, 2 Marks with Answers, 16 Marks with answers, Question Bank, Lecture Notes for EE6703 Special Electrical Machines, Use search box of our website,
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