Download GTU BE/B.Tech 2019 Summer 6th Sem Old 160902 Power Electronics Ii Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem Old 160902 Power Electronics Ii Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(OLD) ? EXAMINATION ? SUMMER 2019
Subject Code:160902 Date:29/05/2019
Subject Name: Power Electronics - II
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.

Q.1 (a) Explain single phase half bridge topology of inverter with Resistive load. 07
(b) Describe the basic principle of operation of a single phase to single phase bridge
type cycloconverter for continuous conduction.
07

Q.2 (a) Explain the working of three phase inverter for 180 degree mode with waveforms
and all necessary equation
07
(b) Draw the power circuit of a series inverter and discuss its operation with all
necessary waveforms.
07
OR
(b) Explain single phase current source inverter with waveform. 07

Q.3 (a) Explain Sine wave PWM technique. What is the effect of modulation index on
output? Explain its merit and demerit.
07
(b) Explain in brief: Matrix Converter. 07
OR
Q.3 (a) Explain 120 degree mode of operation for three phase bridge inverter with
resistive load.
07
(b) Explain principle of integral cycle control for AC voltage controller. 07

Q.4 (a) Explain single phase full-wave AC controller with R load. 07
(b) Explain static Kramer system for slip power recovery. 07
OR
Q.4 (a) Explain the operation of static DC circuit breaker. 07
(b) Enlist various speed control methods for Induction machine. Explain V/f
control scheme with basic block diagram.
07

Q.5 (a) Write a brief note on 1 phase AC voltage controller with PWM control with
necessary waveforms.
07
(b) What are the merits of HVDC? Explain working of HVDC with regards to
power electronics.
07
OR

Q.5 (a) List various FACT?s devices and explain any one in brief. 07
(b) Explain rotor resistive control for induction motor using power electronics
device.
07

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