Special Electrical Machines

Features

• Description
• 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

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