Special Electrical Machines-1|教育線上App不用買

This unique free application is for all students across the world. It covers 91 topics of Special Electrical Machines in detail. These 91 topics are divided in 5 units.

Each topic is around 600 words and is complete with diagrams, equations and other forms of graphical representations along with simple text explaining the concept in detail.

This USP of this application is "ultra-portability". Students can access the content on-the-go from anywhere they like.

Basically, each topic is like a detailed flash card and will make the lives of students simpler and easier.

Some of topics Covered in this application are:

1. Poly-phase AC Machines

2. Classification of A.C. Motors

3. Construction of A.C Motor

4. Phase-wound Rotor

5. Production of Rotating Field

6. Three-phase Supply

7. Relation Between Torque and Rotor Power Factor

8. Starting Torque of induction motor

9. Torque, Rotor E.M.F. and Reactance Under Running Conditions

10. Condition for Maximum Torque Under Running Conditions

11. Relation Between Torque and Slip

12. Full-load Torque, Starting torque and Maximum Torque

13. Torque/Speed Curve

14. Current/Speed Curve of an Induction Motor

15. Plugging of an Induction Motor

16. Complete Torque/Speed Curve of a Three-Phase Machine

17. Measurement of Slip

18. Power Stages in an Induction Motor

19. Torque, Mechanical Power and Rotor Output

20. Induction Motor Torque Equation

21. Analogy with a Mechanical Clutch and D.C. Motor

22. Sector Induction Motor

23. Magnetic Levitation

24. Induction Motor as a Generalized Transformer

25. Equivalent Circuit of the Rotor and Induction Motor

26. Power Balance Equations

27. Circle Diagram for a Series Circuit

28. Circle Diagram for the Approximate Equivalent Circuit

29. Determination of G0 and B0

30. Blocked Rotor Test

31. Construction of the Circle Diagram

32. Starting of Induction Motors

33. Starting of Slip-ring Motors

34. Starter Steps

35. Crawling and Cogging or Magnetic Locking

36. Double Squirrel Cage Motor

37. Speed Control of Induction Motors

38. Three-phase A.C. Commutator Motors

39. Three-phase A.C. Commutator Motors

40. Standard Types of Squirrel-cage Motors

41. Types of Single-Phase Motors

42. Single-phase Induction Motor

43. Double-field Revolving Theory

44. Making Single-phase Induction Motor Self-starting

45. Equivalent Circuit of a Single-phase Induction Motor Without Core Loss

46. Types of Capacitor - start Motors

47. Capacitor Start-and-Run Motor

48. Shaded-pole Single-phase Motor

49. Repulsion Type Motors

50. Repulsion Principle

51. Compensated Repulsion Motor

52. A.C. Series Motors

53. Universal Motor

54. Speed Control of Universal Motors

55. Unexcited Single-phase Synchronous Motors

56. Basic Principle and Stationary Armature of Alternator

57. Details of Construction

58. Damper Windings, Speed and Frequency

59. Armature Windings, Concentric or Chain Windings and Two-Layer Winding

60. Wye and Delta Connections, Short-pitch Winding : Pitch factor/chording factor

61. Distribution or Breadth Factor or Winding Factor or Spread Factor

62. Equation of Induced E.M.F.

63. Factors Affecting Alternator Size

64. Alternator on Load

65. Synchronous Reactance and Vector Diagrams of a Loaded Alternator

66. Voltage Regulation and Determination of Voltage Regulation

67. Synchronous Impedance Method

68. Rothert's M.M.F. or Ampere-turn Method

69. Zero Power Factor Method or Potier Method

70. Operation of a Salient Pole Synchronous Machine

71. Parallel Operation of Alternators and Synchronizing of Alternators

72. Synchronizing Current

73. Alternative Expression for Synchronizing Power

74. Parallel Operation of Two Alternators

75. Effect of Unequal Voltages

76. Time-period of Oscillation

77. Maximum Power Output

78. Stepper Motors

79. Types of Stepper Motors

80. Variable Reluctance Stepper Motors

81. Multi-stack VR Stepper Motor

82. Permanent-Magnet Stepping Motor

83. Hybrid Stepper Motor

All topics are not listed because of character limitations set by the Play Store.

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