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B.E/B.TECH. DEGREE EXAMINATION, MAY/JUNE 2013
Third Semester
Mechanical Engineering
080120013-ELECTRICAL DRIVES AND CONTROL
(Regulation 2008/2010)
ANNA UNIVERSITY SYLLABUS - Click Here
Download PDF File - Click Here
PART A-(10*2=20 marks)
1. What are types of electrical drives?
2. List the factors to be considered for the selection of electrical drives.
3. Draw speed-torque characteristics during regenerative braking of induction motor.
4. What are the types of electric braking of electric motor?
5. State the principle in DOL for 3-phase induction motor.
6. What is the basic principle in starting 3-phase induction motor using rotor resistance starter?
7. Draw the block diagram of phase controlled rectifier fed DC drives.
8. Draw the speed-torque characteristics of DC series motor by armature resistance method.
9. Draw the block diagram of conventional scherbius system.
10. What are the variable frequency AC drive applications?
PART B-(5*16=80 marks)
11. (a) Explain various classes of motor drives.
Or
(b) Describe the section of motor rating for continuous duty load.
12. (a) Explain speed-torque characteristics of different types of load with graph.
Or
(b) Explain with speed-torque characteristics of DC series motor under dynamic braking.
13. (a) Describe with diagram working of 3-point starter for DC shunt motor.
Or
(b) With diagram explain auto transformer starter for three phase induction motor.
14. (a) With circuit describe DC motor Ward-Leonard control system.
Or
(b) Explain first quadrant chopper control of separately excited motor for continuous conduction.
15. (a) Explain voltage/frequency control of 3-phase induction motor.
Or
(b) Describe Kramer system slip power recovery system of 3-phase induction motor.
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