GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 160902
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-VI(OLD) - EXAMINATION - SUMMER 2019
Subject Name: Power Electronics - II
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| 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 | |
| Q.3 | (a) OR Explain single phase current source inverter with waveform. | 07 |
| (b) Explain Sine wave PWM technique. What is the effect of modulation index on output? Explain its merit and demerit. | 07 | |
| Q.4 | (a) Explain in brief: Matrix Converter. | 07 |
| (b) OR Explain 120 degree mode of operation for three phase bridge inverter with resistive load. | 07 | |
| Q.5 | (a) Explain principle of integral cycle control for AC voltage controller. | 07 |
| (b) Explain single phase full-wave AC controller, with R load. | 07 | |
| Q.3 | (a) Explain static Kramer system for slip power recovery. | 07 |
| (b) OR Explain the operation of static DC circuit breaker. | 07 | |
| Q4 | (a) Enlist various speed control methods for Induction machine. Explain V/f control scheme with basic block-diagram. | 07 |
| (b) Write a brief note on 1 phase AC voltage controller with PWM control with necessary waveforms. | 07 | |
| Q4 | (a) What are the merits of HVDC? Explain working of HVDC with regards to power electronics. | 07 |
| (b) OR List various FACT’s devices and explain any one in brief. | 07 | |
| Q.5 | (a) Explain rotor resistive control for induction motor using power electronics device. | 07 |
Date: 29/05/2019
Total Marks: 70
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