Download GTU BE/B.Tech 2019 Summer 6th Sem New 2162404 Industrial Drives And Control I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162404 Industrial Drives And Control I Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162404 Date:10/05/2019
Subject Name:Industrial Drives & Control-I
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
1. Figures to the right indicate full marks.

Q.1 (a) Define Electric Motor Drive and Draw block diagram of Electric Motor Drives. 03
(b) List the comparisons between Active and Passive Load Torque. 04
(c) Derive torque equation of DC Motor indicating Dynamic of Electric Drive 07
Q.2 (a) Define Group Drive, Individual Drive and Multi-motor Drive 03
(b) List the different types of Speed Control of DC Motor. Explain any one with
necessary diagram and equations.
04
(c) Draw and explain mathematical model of armature controlled DC drive. 07
OR
(c) List the types of Duty in Electrical Motor Drive and Explain each in brief. 07
Q.3 (a) Draw Circuit diagram and characteristics of Chopper circuit for braking control. 03
(b) Explain the comparisons between: Field and Armature Control of DC Motor. 04
(c) Explain the two quadrant operation of Chopper Controlled separately excited DC
motor with suitable diagram.
07
OR
Q.3 (a) Draw and Explain Static Ward Leonard System. 03
(b) Explain the comparisons between: Constant Torque and Constant HP Operation. 04
(c) Explain closed loop control scheme of separately excited DC motor for control
of below & above base speed.
07
Q.4 (a) Why PI Control is very important in closed loop DC drive system? 03
(b) Explain the difference between: Circulating & Non Circulating mode of dual
converter operation.
04
(c) Write technical short note on: PLL Based DC Drive. 07
OR
Q.4 (a) Draw and explain the field current reversible drive. 03
(b) Explain the comparisons between In phase and phase shifted mode of multiphase
chopper.
04
(c) Using block diagram & necessary flow chart explain working of microcomputer
control of DC Drives.
07
Q.5 (a) Draw and Explain requirement of servo motor drives. 03
(b) Draw and explain block diagram of Permanent Magnet DC Motor Drives. 04
(c) Explain traction drive employing two stage converter feeding four separately
excited motors.
07
OR
Q.5 (a) Explain the selection of drive for speed reversal. 03
(b) Why Current loop in to be introduced as an inner loop in closed loop operation?
Explain with necessary comments.
04
(c) Define Stability of motor load combination. Explain criteria for steady state
stability for using seven possible combination of speed and torque curve of motor
and load.
07

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