Electric machines, space vectors, and magnetic field distributions in motion

1. Schematic diagram of a dc machine.

2. Schematic diagram of a brushless dc motor.

3. Position control of a dc motor.

4. Schematic diagram of a wound-rotor induction motor.

5. Structure of a squirrel-cage induction machine.

6. Principle of operation of squirrel-cage induction motor and generator.

7. Behavior of a squirrel-cage induction machine (axial view).

8. Behavior of a squirrel-cage rotor in a two-pole field (developed view).

9. Sinusoidally distributed windings and fields in a three-phase ac machine.

10. Magnetic field distributions due to single-phase excitation.

11. Air gap flux plot due to three-phase excitation.

12. Sinusoidal space distributions of mmf under balanced three-phase excitation.

13. Motion of space vectors in a three-phase excitation system.

14. Space vector decomposition in the synchronous dq frame.

15. Sinusoidal distributions and corresponding space vector representations.

16. Space vectors for a balanced three-phase sinusoidal signal.

17. Sinusoidally distributed windings.

18. Animated phasors of an induction motor (Torque-speed curve).

19. Volt per Hz speed control of an induction motor.

20. Motion of space vectors in an induction motor operating with step loads.

21. Schematic diagram of a four-phase 8/6 switched-reluctance motor.

22. Elementary 3-phase round rotor synchronous generator.

23. Elementary 3-phase 2-pole alternator with corresponding generated voltages.

24. Synchronization of three-phase ac systems.

25. Transient stability of a synchronous machine described by voltage space vectors.

26. Animated phasor diagrams of a synchronous generator (Compounding curve).

27. Animated phasor diagrams of a synchronous motor (V curve).

28. Animated phasor diagrams of a synchronous motor (Power-angle curve).

29. Three-phase inverter.

30. Direct torque control of ac machines.

31. Still images of windings, fields, and steady-state characteristics of electrical machines.

32. The mathematics of electric machine modeling.

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