EE6351 Electrical Drives And Control Question Bank : dmice.ac.in

Name of the College : DMI College OF Engineering
Subject : Electrical Drives And Control
Website : dmice.ac.in
Document type : Question Bank

Download Electrical Drives And Control Model Question Paper : https://www.pdfquestion.in/uploads/dmice.ac.in/1452-EE6351.doc

DMI Electrical Drives And Control Question Paper

EE6351- ELECTRICAL DRIVES AND CONTROL :

UNIT-I

PART-A :
1.What is meant by Electrical Drives?
2.What is thermal Overloading?
3.List the Electrical Braking of DC motor ?and Induction motor?
4.Define Heating time constant?
5.What are all the factors which affects the selection of drives?
6.Give the important parts of electrical drives?
7.Give some advantages of electrical drives?
8.Draw the block diagram of an electrical drives.
9.Define cooling time constant?
10. Draw and explain the heating and cooling curve.

11. State the advantage of group drive.
12. Define thermal overloading factor for a motor working on short time duty.
13. What are the types of Electrical drives.
14. Name the four commonly methods for the determination of power rating of motors.
15. Give the examples for continuous duty at constant load is required.
16. What is meant by continuous rating?
17.Give the formula for computing power requirement for a liner movement.
18. What is meant by overload current capability of motor?
19. Draw the speed torque characteristics of
(i).Dry friction load (ii).Viscous friction load
(iii) Fan type load (iv).Constant power load
20. What is meant by intermittent duty?
PART-B :
1.Give the type of Duty cycle and Explain with a neat Diagram.
2.Explain the factors influencing the choice of motor drives.
3.Selection of drives depends on the purpose for which they are meant for explain this statement With suitable examples.
4. Describe the selection of power rating for drive motor with regarding to thermal Overloading.
5. Describe the selection of motor rating for continuous duty load.
6. State and explain the disadvantages of using a motor of wrong rating.
7. Explain the method of estimating equivalent continuous power rating of motor for short time load application.
8. Explain the thermal model of an electric motor for
i) Heating the electric motor when starting from cold.
ii) Cooling the electric motor when it is switched OFF from the mains.
9. Explain what is meant by group drive. What are the advantages and disadvantages?
10. Explain the different types of Electrical drives.

UNIT-II

PART-A :
1.Define plugging?(R)
2.Draw the mechanical characteristics of DC motor(N-T)?(R)
3.Sketch the mechanical characteristics of 3f induction motor with V/f control? (R)
4.What is meant by regenerative braking? And Dynamic Braking?
5.Define synchronous(Ns) speed and slip(S)?(R)
6.DC series motor should be started only with load why?
7.Name the type of braking used in DC motor and IM motor?
8.Why a 1f induction motor cannot self-start?
9.What are the two type of rotors employed in a 3f IM?
10. What are the Electrical braking of electric motor?
11. Draw the N-T characteristics of regenerative braking of IM.
12. List the types of single phase induction motor.
13. Draw the mechanical characteristics of a three phase induction motor.
14. State the advantage of electrical braking.
15. Write down the torque equation of DC shunt motor and give the significance of flux.
16. What is the slip of induction motor? State its expression.
17. Why is a DC series motor used to start heavy loads? Or why DC series motor is never started on No load?
18. What are advantage of three phase slip ring induction motor.
19. State the condition for maximum torque of three phase IM? What is the maximum torque equal to?
20. Write the advantage of slip ring induction motor.