--- Content provided by FirstRanker.com ---
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER-VIII(OLD) EXAMINATION — WINTER 2017
Subject Code: 181702 Date: 02-11-2017
--- Content provided by FirstRanker.com ---
Subject Name: Motion Control
Time: 02:30 pm to 05:00 pm Total Marks: 70
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
--- Content provided by FirstRanker.com ---
Q.1 (a) Explain resolvers and magnetic pickups as a encoder. 07
(b) List out selection criteria for dc motor for incremental motion applications. 07
Q.2 (a) Explain permanent magnet moving coil dc motor. 07
--- Content provided by FirstRanker.com ---
(b) Explain the techniques for minimizing torsional resonance effect in detail. 07
OR
--- Content provided by FirstRanker.com ---
(b) List out all methods of speed control of dc motor and explain any one in detail. 07
Q.3 (a) Write a short note on unidirectional servo amplifier. 07
(b) Explain bipolar PWM amplifiers. 07
--- Content provided by FirstRanker.com ---
OR
Q.3 (a) Draw and explain velocity control system with block diagram. 07
--- Content provided by FirstRanker.com ---
(b) Write short not on phase locked servo system. 07Q.4 (a) Describe the hybrid type step motor with relevant waveform/diagram. 07
(b) List out the selection criteria for stepper motor. Explain step angle resolution and 07
--- Content provided by FirstRanker.com ---
torque requirements.
OR
--- Content provided by FirstRanker.com ---
Q.4 (a) What are the advantages and disadvantages of step motors? Explain the step 07
motor performance characteristics in detail.
(b) Explain any two application of step motor. 07
--- Content provided by FirstRanker.com ---
Q.5 (a) Explain any one suppression circuit for DC motor control with diagram. 07
(b) Explain effect of lead angle’in closed loop control of step motor. 07
--- Content provided by FirstRanker.com ---
OR
Q.5 (a) Draw and explain bidirectional four-phase single and two phase on logic 07
sequencer circuit-with waveform of output phase for each pulses.
--- Content provided by FirstRanker.com ---
(b) Why over drive circuits are required for step motors? Explain dual voltage 07
control circuit.
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---