Electrical Machines II [EEE Department]

Electrical Machines II [EEE Department]

Electrical Machines II

SYNCHRONOUS GENERATOR

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

SYNCHRONOUS MOTOR

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

THREE PHASE INDUCTION MOTOR

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

STARTING AND SPEED CONTROL OF THREE PHASE INDUCTION MOTOR

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

SINGLE PHASE INDUCTION MOTORS AND SPECIAL MACHINES

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