Download GTU BE/B.Tech 2019 Winter 7th Sem New 2172410 Power Electronics Design Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 7th Sem New 2172410 Power Electronics Design Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VII (New) EXAMINATION ? WINTER 2019
Subject Code: 2172410 Date: 30/11/2019

Subject Name: Power Electronics Design
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Describe the function of PUT with suitable example circuit 03
(b) Enlist steps to design power electronics circuit. 04
(c) Make suitable design of non-isolated driver circuit for IGBT. Support your
answer with suitable diagrams.
07

Q.2 (a) Enlist & explain steps for transformer design at line frequency. 03
(b) Discuss the effect of poor grounding for driver circuits. 04
(c) Discuss the design aspects and component selection for Snubber Circuit. 07
OR
(c) Describe the methods adopted for suppressing over voltages in thyristor. 07

Q.3 (a) Enlist the requirement of isolated driver circuit. 03
(b) Write a technical note on di/dt and dv/dt protection. 04
(c) Describe the steps involving in high frequency inductor design for boost
converter.
07
OR
Q.3 (a) Enlist the importance of isolated driver circuit. 03
(b) Write a technical note on Thermal protection 04
(c) Discuss the method to design high frequency transformer for flyback
converter.
07

Q.4 (a) Write a note on: opto-coupler. 03
(b) Draw any one isolated driver circuit for TRIAC. 04
(c) Discuss a method to measure analog quantity like voltage, current &
frequency.
07
OR
Q.4 (a) Discuss working of pulse transformer in brief. 03
(b) Write a brief note on floating ground concept. 04
(c) Design non-isolated type driver circuit for Power BJT. Support your answer
with suitable diagrams.
07

Q.5 (a) Explain the Natural Cooling & forced Cooling of Heat Sinks. 03
(b) Enlist & explain types of PCBs. 04
(c) Write a short note on design Considerations for Voltage Isolation and
Current Capacity for PCB design.
07
OR

Q.5 (a) Write a detailed note on Thermal Resistance & its Consideration 03
(b) Explain the Noise Reduction Through PCB Layout. 04
(c) Write a brief note on PCB designing. 07
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