Download GTU BE/B.Tech 2018 Winter 5th Sem New 2152407 Power Electronic Circuits I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem New 2152407 Power Electronic Circuits I Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2152407 Date:11/12/2018

Subject Name:Power Electronic Circuits-I

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) Explain Latch-up in IGBT. 03
(b) Design & discuss Gate driver circuit for MOSFET. 04
(c) List out all thyristor protections & discuss in details. 07

Q.2 (a) Give comparison of MOSFET & IGBT. 03
(b) Draw only symbol & internal structure & VI Characteristics of Power
BJT.
04
(c) Explain working of 3-phase 6 Pulse rectifier with RLE Load. Draw
waveforms for VL, VPH , Vo & Io
07
OR
(c) Explain working principle of 12 pulse rectifier. 07

Q.3 (a) Explain working of Class-A Chopper. 03
(b) Draw only circuit diagram & waveforms for 1-Phase Full-wave
Controlled Rectifier with RL Load in inversion mode.
04
(c) Enlist & explain triggering circuits for SCR. 07
OR
Q.3 (a) Discuss operation of class-C type two quadrant choppers with motor load. 03
(b) Discuss principle of phase control rectifier. 04
(c) Discuss working of 1-phase dual converter with suitable diagrams. 07

Q.4 (a) Draw circuit diagram & waveforms for SEPIC Converter. 03
(b) Draw only circuit diagram & waveforms for Jones chopper. 04
(c) Discuss operation of Push-Pull type isolated DC-DC converter with
necessary diagrams.
07
OR
Q.4 (a) Give advantages of Zeta converter over conventional DC-DC converter. 03
(b) Discuss operation of multi phase chopper with motor load. 04
(c) Write a short note: Flyback converter. 07

Q.5 (a) List out application of boost converter. 03
(b) Compare series & parallel resonant converter. 04
(c) Explain operation of L-type ZCS converter with necessary equations &
Diagrams.
07
OR

Q.5 (a) Compare Buck & Boost converter. 03
(b) Enlist various requirements of isolation in power electronics circuits. 04
(c) Discuss ZVS resonant converter 07

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