Download GTU BE/B.Tech 2019 Summer 7th Sem Old 170906 Advanced Power Electronics I Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem Old 170906 Advanced Power Electronics I Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII (OLD) EXAMINATION ? SUMMER 2019
Subject Code: 170906 Date: 10/05/2019

Subject Name:Advanced Power Electronics - I

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

Q.1 (a) Explain basic series load resonance converter with necessary circuit diagram and
waveforms.
07
(b) Explain operation of 12-pulse converter with circuit diagram and necessary
waveforms.
07

Q.2 (a) Discuss basic concept of multilevel inverter. Write advantages and disadvantages
of multilevel inverter.
07
(b) List the separate DC sources used for cascaded multilevel inverter. Explain
operation of five level cascaded multilevel inverter.
07
OR
(b) Discuss operation of three level diode clampled multilevel inverter 07

Q.3 (a) Explain Y-Z1 transformer connection used for multipulse converter. 07
(b) List application of multipulse converter. Draw the transformer connections for
18 and 24 pulse converter.
07
OR
Q.3 (a) Discuss operation of flying capacitor multilevel inverter. 07
(b) Compare multipulse converter with multilevel inverter. 07

Q.4 (a) Explain working of forward converter based switch mode power supply. 07
(b) Discuss two quadrant ZVS converter with necessary circuit diagram and
waveforms.
07
OR
Q.4 (a) Discuss push pull converter and its application in dc power supply. 07
(b) Explain operation of ZCS converter with diagram and wave forms. 07

Q.5 (a) Explain operation and control of On-Line and Off-Line UPS. 07
(b) Discuss working and operation of Brushless dc motor. Show derivation of
switching pulses using Hall sensor signals.
07
OR

Q.5 (a) Discuss phenomenon of electromechanical energy conversion in SRM. 07
(b) With neat circuit diagram and waveform discuss class E resonant inverter. 07

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