Download GTU B.Tech 2020 Winter 7th Sem 2172410 Power Electronics Design Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 7th Sem 2172410 Power Electronics Design Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?VII (NEW) EXAMINATION ? WINTER 2020
Subject Code:2172410 Date:28/01/2021
Subject Name:Power Electronics Design
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Draw the structure & explain the working principle of Power BJT.
03

(b) Enlist steps to design power electronics circuit.
04

(c) Explain any one non-isolated driver circuit for SCR with design
07
consideration.


Q.2 (a) Enlist & explain steps for Inductor design.
03

(b) Discuss the design aspects and component selection for Snubber Circuit.
04

(c) Discuss the effect of poor grounding for driver circuits.
07




Q.3 (a) Enlist the requirement of isolated driver circuit.
03

(b) Write a technical note on di/dt and dv/dt protection of SCR.
04

(c) Describe the steps involving in high frequency inductor design for boost
07
converter.




Q.4 (a) Enlist the importance of isolated driver circuit.
03

(b) Write a technical note on over current protection
04

(c) Discuss the method to design high frequency transformer for Flyback
07
type DC-DC converter.



Q.5 (a) Write a note on: opto-coupler.
03

(b) Draw any one isolated driver circuit for MOSFET.
04

(c) Discuss a method to measure analog quantity like voltage, current &
07
frequency.



Q.6 (a) Discuss working of pulse transformer in brief.
03

(b) Draw any one isolated driver circuit for IGBT.
04

(c) Design non-isolated type driver circuit for TRIAC. Support your answer
07
with suitable diagrams.



Q.7 (a) Define Heat Sink. List the types of Heat Sink according to heat
03
Dissipation method.

(b) Enlist & explain types of PCBs.
04

(c) Write a short note on PCB design for mixed signal (analog and digital)
07
circuit



Q.8 (a) Compare the Active and Passive Heat Sink.
03
(b) Explain the Noise Reduction Through PCB Layout.
04
(c) Write a short note on design considerations for Voltage Isolation and
07
Current Capacity for PCB design.
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