Download GTU BE/B.Tech 2018 Winter 7th Sem Old 170906 Advanced Power Electronics I Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (OLD) EXAMINATION — WINTER 2018

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Subject Code: 170906 Date: 15/11/2018
Subject Name: Advanced Power Electronics - I
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain operation of 12-pulse converter with circuit diagram and input-output voltage waveforms. 07
(b) Using single pole multiple throw switch, discuss operation of multilevel inverter. 07
Q.2 (a) Compare: Multipulse converter and Multilevel inverter 07

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(b) Explain fly back converter topology with diagram and wave forms. 07
OR
(b) Discuss push pull converter and its application in dc power supply. 07
Q.3 (a) With neat circuit diagram and waveform discuss class E resonant inverter. 07
(b) Discuss operation of diode clamped multilevel inverter. Discuss its merits and limitations. 07

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OR
Q.3 (a) Draw block diagram of UPS and discuss each block in detailed. 07
(b) Explain operation of flying capacitor multilevel inverter. 07
Q.4 (a) Discuss operation of Cascaded multilevel inverter. 07
(b) Discuss ZVS converter with necessary circuit-diagram and waveforms 07

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OR
Q.4 (a) Explain A-Z1 transformer connection used-for multipulse converter. 07
(b) Give analysis of basic series load resonance converter with necessary circuit diagram and waveforms. 07
Q.5 (a) Compare: ZVS and ZCS. 07
(b) Discuss working and operation of Brushless dc motor 07

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OR
Q.5 (a) Discuss Full bridge dc (b) Write a short note onVariable reluctance Stepper Motor. 07
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