EEE - ELECTRICAL MACHINES 2 ( R2023 ) STUDY MATERIALS

 

ELECTRICAL MACHINES 2 ( R2023 SCHEME )

( 10 MARKS )

 

UNIT - 1

1.     Derive an expression for the EMF equation of an alternator.

2.     Explain the working principle of alternator with necessary diagrams.

3.     Explain the stator and rotor construction details of a salient pole alternator.

4.     Construction of Cylindrical Type rotor:

5.     Comparison of Salient Pole rotor and cylindrical rotor

6.     Derive an expression to find the distribution factor.

 

 

UNIT – 2

 

1.     Explain the effect of armature reaction of alternators for various power factor loads.****

2.     Explain how regulation of alternator is determined by conducting direct load test.**

3.      Explain the necessity, conditions and advantages of parallel operation of alternator.

4.     Synchronizing by Dark Lamp Method

5.     Bright Lamp Method

UNIT – 3

 

1.     Explain with neat sketches the construction details of slip ring induction motor.

2.     Explain Star delta starter

3.     Explain Auto transformer starter

4.     DOL STARTER

5.     Derive an expression for starting torque of three phase induction motor. Explain the relationship between starting torque and full load torque.

6.     Explain with neat sketches the construction details of squirrel cage induction motor.

 

UNIT – 4

 

1.     Explain the construction, working and speed torque characteristics of a capacitor start and capacitor run induction motor.**

2.     Explain the construction, working and speed torque characteristics of a shaded pole induction motor.

3.      Explain the construction, working and speed torque characteristics of a repulsion start induction motor.

4.     Universal motor - construction, working and characteristics

5.     Explain vacuum impregnation process carried out for induction motors.

6.     Explain the causes for the troubles that occur in an induction motor / Explain the remedial actions to be taken for any seven troubles that occurs in an induction motor.

 

UNIT – 5

 

1.     Explain the principle of operation of a synchronous motor.**

2.     comparison of synchronous and induction motors

3.     CONSTRUCTION AND PRINCIPLE OF OPERATION OF PERMANANANT MAGNET SYNCHRONOUS MOTOR

4.     Working Principle of AC Servo Motor

5.     Linear Induction Motor