University question paper of Electronic Drives and Control for Final year EEE students. Electronic Drives and Control’s abbreviation is EDC. EDC Nov/Dec 2011 question paper is available for free download.
EDC Question Paper :
ANNA UNIVERSITY OF TECHNOLOGY,
B.E / B.TECH, DEGREE EXAMINATIONS : NOV / DEC 2011
REGULATIONS : 2008
SEVENTH SEMESTER : EEE
080280075 – ELECTRONIC DRIVES AND CONTROL
Time : 3 Hours Max. Marks : 100
PART – A ( 10 * 2 = 20 MARKS )
ANSWER ALL QUESTIONS
1) List out the Classes of Duty
2) Define Electronic Braking
3) What is Ward Leonard System?
4) Compare the field and armature control of DC motor.
5) What is Vector Control method?
6) Define V / F Control.
7) What is effect of harmonics in AC Motor.
8) List out the methods of speed control of 3 phase Synchronous motor.
9) Draw the block diagram of PLC based drive.
10) List out the control scheme for lift and cranes drive.
PART – B ( 5 * 16 = 80 MARKS )
ANSWER ALL QUESTIONS
11) (a) Explain the different types of braking and also discuss the braking characteristics.
( OR )
(b) Explain the factors influencing the choice of Electronic drives and also explain the classes of duty.
12) (a) With neat diagram explain various braking methods of DC Series motor.
( OR )
(b) A 220V, 1500rpm, 10A separately exited DC Motor is fed from a 1 phase fully controlled rectifier with an AC source voltage of 230V, 50 Hz. Ra = 2 ohm. Conduction can be assumed to be continuous. Calculate the firing angles for half rated motor torque and 500rpm.
13) (a) Explain the principle of slip power recovery scheme for variable speed operation of an induction motor.
( OR )
(b) Explain the methods of speed control of 3 phase induction motor using inverter.
14) (a) With neat diagram explain the cycloconverter fed Synchronous motor and also discuss the merits and demerits.
( OR )
(b) With neat diagram explain the true synchronous and Self-controlled modes.
15) (a) Explain the Suitable blocks of Digital control techniques and also explain the microprocessor based control of drive.
( OR )
(b) Explain the drive Selection and control schemes for steel rolling mill.
Download - EDC - EEE final year question paper 2011