GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (OLD) EXAMINATION — WINTER 2017
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Subject Code: 152403 Date: 08-11-2017Subject Name: Applied Power Electronics
Time: 10:30 am to 01:00 pm Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Define Electrical Motor Drive. Draw and Explain block diagram of electric motor drive system. 07
(b) Explain working of peak detector circuit with neat diagram. Draw relevant waveforms. 07
Q.2 (a) What is PWM? Explain single pulse width modulation technique. Where is it used? 07
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(b) What is power electronics? Discuss concept of power processing. 07OR
(b) Explain basic power diagram, working, advantages, disadvantages and application of cycloconverter. 07
Q.3 (a) Explain working of HVDC transmission. 07
(b) Explain working of uninterrupted power supply (UPS) with block diagram. 07
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OR
Q.3 (a) Explain op-amp based high pass filter circuit. Also draw its response 07
(b) Write short note on: Active power filter. 07
Q.4 (a) Explain off line UPS with basic block diagram. 07
(b) Draw and explain charging circuit for battery. 07
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OR
Q.4 (a) Explain SMPS with necessary schematic diagram. 07
(b) Explain working of half wave controlled converter circuit. 07
Q.5 (a) Discuss induction heating as an industrial application. 07
(b) Write a brief note on high frequency fluorescent lighting. 07
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OR
Q.5 (a) With block diagram, explain working of speed control DC Motor. 07
(b) Explain induction cooking with necessary block diagram. 07
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