PSD Question Bank

Review Questions: PSD

1. Write the expression for angular speed of the stator mmf in mech rad/sec.
2. Show the variation of mmf along the stator surface with concentrated and distributed winding.
3. Write the expression for fundamentals of mmf per pole with concentrated and distributed winding.
4. Show the stator and rotor mmf waves in a synchronous machine.
5. List the basic equations that are required to describe the electrical part of the SM.
6. List the assumptions made in the modeling of SM.
7. List the different types of winding in a SM.
8. Draw the seven winding model of a 3-phase SM.
9. Show the variation of permeance with rotor position.
10. Write the flux linkage equations for the seven windings of SM.
11. Write the voltage equations of SM.
12. Describe the approach to derive an expression for self inductance of stator winding of SM.
13. What are the different methods of producing changing flux linkages?
14. Give the expression for transformer emf and speed emf.
15. How will you classify the electromagnetic machines using transformer emf and speed emf?
16. What are the assumptions made in mathematical description of SM.
17. What are the  windings considered in the rotor side of the seven winding model of a 3-phase SM.
18. Give the turns ratio between the stator and f-winding before and after transformation from abc to dq0.
19. Give the phasor diagram for the stator voltage equations.
20. Write the complete flux linkage equations in park’s coordinates.
21. What is stator transients?
22. Write the parks direct transformation and inverse transformation matrix.
23. Write the voltage equations after park’s transformation.
24. Define the term β.
25. Derive the expression for stator self inductance and show how it is varied as a function of β.
26. Derive the expression for stator-to-stator mutual inductances.