INDUSTRIAL DRIVES AND CONTROL

1  a) Fill in the blanks with appropriate word / words                                               (1 X 5 = 5)

1. i)In II quadrant operation the motor produces _________ Torque.
2. ii)Free running is absent in _________ traction service

iii)                In industrial robotics _________ motor is used

1. iv)The _________ diagram is the basic diagram from which other circuits diagrams are developed
2. v)The area between speed time curve and time axis gives _________

1. b) Write a short note on multi quadrant operation of motors                                                 (5)

Section – II

2  a) Draw the process flow diagram of paper mill and explain different                                   9

Stages

1. b) Select suitable for the following and justify a) Sugar Centrifuge                                           3
2. c) Select suitable motors for the following and justify your selection                                        3
3. I) Cranes & Hoist

3  a) Draw the process flow diagram of the cement mill and explain different

Stages                                                                                                                                            7

1. b) Select suitable FHP motor for the following and state the reasons                                         4
2. i) Robotics ii)CNC

1. c)  Select suitable motor for the following and state the reasons 4
2. i) Compressors ii) sugar centrifuge Machine

4  a) Explain four types of drives                                                                                                8

1. b) State advantages of electric drive                                                                                     2
2. c) Draw the block diagram of slip recovery system for wound rotor

Induction motor and explain its operation                                                                              5

Section – III

5  a) Explain speed time curve in main service line                                                                  9

1. b) List the advantages and disadvantages of electric traction                                                             3
2. c) Explain single arm pantograph current collector                                                                  3

6   a] explain diesel electric traction                                                                                         7

1. b) Explain regenerative braking for 3 – phase induction motor                                                4
2. c) Explain train lighting                                                                                                           4

7  a) what is preventive maintenance list its advantages & disadvantages                               8

1. b) Explain different causes and remedies of troubles in electric traction                                5
2. c) State the motors used in electric traction                                                       2

Section – IV

8  a) Draw the block diagram of the open loop and closed loop control

System and explain                                                                                                                    9

1. b) Describe automatic control system                                                                                       3
2. c) List the different diagrams used in motor control circuit                                                      3

9  a) Describe closed loop speed control of motor                                                                    7

1. b) Define motor control circuit                                                                                                  4
2. c) Develop forward and reverse motor control circuit                                                              4

10  a) Describe advantages of distributed control system                                                         8

1. b) Explain functional requirements of distributed process control system                               5

c] Define motor control centre                                                                                                   2