GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
Subject Code: 2162409
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER- VI (New) EXAMINATION - WINTER 2019
Subject Name: Power Electronic Circuits — II
Time: 02:30 PM TO 05:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Define (1) THD (2) DF (3) HFn | 03 |
| (b) Discuss basic concept of AFE and its advantages over conventional converter. | 04 | |
| (c) Explain AC Voltage Regulators. | 07 | |
| Q.2 | (a) Discuss importance of dead band in inverter circuit. | 03 |
| (b) List out advantages of resonant pulse inverter. | 04 | |
| (c) Explain the single phase voltage controllers for RL type load with waveforms. | 07 | |
| OR | ||
| (c) Write & explain about the principle operation of quasi-square wave inverter. | 07 | |
| Q.3 | (a) Explain Multiple PWM Techniques in brief. | 03 |
| (b) Explain ZVS and its significance. | 04 | |
| (c) Explain working of McMurray inverter. | 07 | |
| OR | ||
| (c) Define important performance parameter of inverter. | 07 | |
| Q.4 | (a) Discuss ZCS Resonant Inverter. | 03 |
| (b) With necessary diagrams, explain McMurray-Bedford inverter. | 04 | |
| (c) Enlist the various applications of Voltage Source Inverter. | 07 | |
| Q.5 | (a) Discuss high and low side Switch Drivers-for Inverter. | 03 |
| (b) Explain the three phase inverter with 120° conduction mode. | 04 | |
| (c) | 07 | |
| OR | ||
| (a) Give classification of resonant converters. | 03 | |
| (b) Define any one External Control Techniques for Inverter. | 04 | |
| (c) Explain the three phase inverter with 180° conduction mode. | 07 | |
| Q.5 | (a) Explain SVPWM Techniques in brief. | 03 |
| (b) Give the classification of different control strategy of Voltage Source Inverter. | 04 | |
| (c) Draw and briefly explain five level cascade H bridge type multilevel inverter. | 07 | |
| OR | ||
| (a) Write the Advantages & Disadvantages of Multilevel Inverter. | 03 | |
| (b) Compare: Multilevel inverter with two level inverter. | 04 | |
| (c) Explain five-level diode clamped multilevel inverter with circuit diagram and waveforms. | 07 |
Date: 09/12/2019
Total Marks: 70
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