Electrical Machines II
- Lecture Notes, Study Materials and Important questions answers

Subject : Electrical Machines II

SYNCHRONOUS GENERATOR

1. Fundamental Principles of A.C. Machines - Answer (click here)
2. E.M.F. equation of an elementary alternator single phase - Answer (click here)
3. E.M.F. equation of an elementary alternator three phase - Answer (click here)
4. Relation between speed and frequency - Answer (click here)
5. Factors affecting the induced emf (Coil Pitch and Distributed Windings) - Synchronous Generator - Answer (click here)
6. Armature Reaction - Synchronous Generator - Answer (click here)
7. Synchronous Generators - Answer (click here)
8. Open circuit characteristic (OCC) and Short Circuit Characteristics (SCC) of a Synchronous generator - Answer (click here)
9. Armature Reaction Reactance - Synchronous Generators - Answer (click here)
10. Synchronous reactance - Answer (click here)
11. Short Circuit Ratio (SCR) - Synchronous Generator - Answer (click here)
12. Load Characteristics - Synchronous Generator - Answer (click here)
13. Potier Reactance - Synchronous Generator - Answer (click here)
14. Voltage Regulation - Synchronous Generator - Answer (click here)
15. Methods of finding Voltage Regulation in Synchronous Generator - Answer (click here)
16. Power angle characteristics - Answer (click here)
17. Salient pole alternators and Blondel's Two Reaction Theory - Answer (click here)
18. Direct-axis and Quadrature-axis Synchronous Reactances - Answer (click here)
19. Power Angle Characteristic of Salient Pole Machine - Answer (click here)
20. Slip Test - Answer (click here)
21. Parallel Operation of Alternators - Answer (click here)
22. Synchronizing Current - Answer (click here)
23. Effect of Change of Excitation - Answer (click here)
24. Effect of Change of Input Torque - Answer (click here)
25. Sharing of load when two alternators are in parallel - Answer (click here)
26. Prime-mover Governor Characteristic - Answer (click here)
27. Important Short Questions and Answers: Synchronous Generator - Answer (click here)

SYNCHRONOUS MOTOR

1. Synchronous Motors: Construction, Operating Principle, Equivalent Circuit - Answer (click here)
2. Phasor Diagram - Synchronous Motors - Answer (click here)
3. Torque and Power Relations - Answer (click here)
4. V-Curves and Inverted V-Curves - Answer (click here)
5. Effect of Changing Field Excitation at Constant Load - Answer (click here)
6. Synchronous Condenser and its Advantages, Disadvantages - Answer (click here)
7. Methods of starting synchronous motor - Answer (click here)
8. Performance Characteristic of Synchronous Motors - Answer (click here)
9. Hunting and Damper Winding - Answer (click here)
10. Synchronous Induction Motor - Answer (click here)
11. Important Short Questions and Answers: Synchronous Motors - Answer (click here)

THREE PHASE INDUCTION MOTOR

1. Three Phase Induction Motor - Answer (click here)
2. Types and Construction of Three Phase Induction Motor - Answer (click here)
3. Squirrel cage Induction Motors - Answer (click here)
4. Slip ring Induction Motors - Answer (click here)
5. Principle of Operation - Three Phase Induction Motor - Answer (click here)
6. Rotating Magnetic Field and Induced Voltages - Answer (click here)
7. Alternate Analysis for Rotating Magnetic Field - Answer (click here)
8. Phasor Diagram of Three Phase Induction Motor - Answer (click here)
9. Equivalent Circuit of Three Phase Induction Motor - Answer (click here)
10. Power and Torque Relations of Three Phase Induction Motor - Answer (click here)
11. Induction Motor Torque - Answer (click here)
12. Rotor Output - Answer (click here)
13. Circle Diagram - analyse the three phase induction motor performance - Answer (click here)
14. Tests to Determine the Equivalent Circuit Parameters - Induction Motor - Answer (click here)
15. Construction of Circle Diagram - Induction Motor - Answer (click here)
16. Performance Characteristics of Three phase Induction Motor - Answer (click here)
17. Operation with Unbalanced Supply Voltage on Polyphase Induction Motors - Answer (click here)
18. Important Short Questions and Answers: Three Phase Induction Motor - Answer (click here)

STARTING AND SPEED CONTROL OF THREE PHASE INDUCTION MOTOR

1. Methods of Starting Three Phase Induction Motors - Answer (click here)
2. Starting of Slip-Ring Induction Motors - Answer (click here)
3. Speed control of Three Phase Induction Motors - Answer (click here)
4. Changing applied voltage - Speed control of Three Phase Induction Motors - Answer (click here)
5. Rotor resistance control - Speed control of Three Phase Induction Motors - Answer (click here)
6. Cascade control - Speed control of Three Phase Induction Motors - Answer (click here)
7. Pole changing method - Speed control of Three Phase Induction Motors - Answer (click here)
8. Stator frequency control - Speed control of Three Phase Induction Motors - Answer (click here)
9. Power Stages in an Induction Motor - Answer (click here)
10. Double Cage Induction Motor: Construction, Working - Answer (click here)
11. Cogging and Crawling of Induction Motor - Answer (click here)
12. Induction Generator - Answer (click here)
13. Induction Generator advantages, disadvantages and Application - Answer (click here)
14. Induction Motor Braking Regenerative Plugging Dynamic - Answer (click here)
15. Important Short Questions and Answers: Starting and Speed Control of Three Phase Induction Motor - Answer (click here)

SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES

1. Single Phase Induction Motors - Answer (click here)
2. Double Revolving Field Theory of Single Phase Induction Motor - Answer (click here)
3. Equvalent Circuit of Single Phase Induction Motor - Answer (click here)
4. Methods of Starting Single Phase Induction Motor - Answer (click here)
5. Principle and Working of Split Phase Induction Motor - Answer (click here)
6. Types of Split-Phase Induction Motors - Answer (click here)
7. Repulsion starting - Single Phase Induction Motor: Construction, Working and Characteristics - Answer (click here)
8. Shaped Pole Starting - Single Phase Induction Motor - Answer (click here)
9. Single Phase Series Motor: Operation, Applications, Phasor Diagram - Answer (click here)
10. Schrage Motor - Answer (click here)
11. Universal Motors: Operation, Characteristic, Applications - Answer (click here)
12. Magnetic Levitation - Answer (click here)
13. Stepper Motor Advantages and Disadvantages - Answer (click here)
14. Important Short Questions and Answers: Single Phase Induction Motor and Special Machines - Answer (click here)