Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162409 Power Electronic Circuits ? Ii Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2162409 Power Electronic Circuits ? Ii Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162409 Date:27/11/2018

Subject Name:Power Electronic Circuits ? II

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) Define (1) THD (2) DF (3) HF 03
(b) List out advantages of resonant pulse inverter. 04
(c) Explain AC Voltage Regulators. 07

Q.2 (a) Explain Multiple PWM Techniques in brief. 03
(b) Discuss importance of dead band in inverter circuit. 04
(c) Enlist & explain advantages & applications of Active front end
rectifier.
07
OR
(c) Explain working of single phase voltage controllers with RL load. 07
Q.3 (a) Explain voltage mode & current mode control of inverter. 03
(b) Discuss operation of series inverter with necessary diagrams. 04
(c) Write about modulation techniques and Explain sinusoidal PWM. 07
OR
Q.3 (a) Draw only the circuit for McMurray Bedford Inverter. 03
(b) Define important performance parameter of inverter. 04
(c) Write a short note on three phase inverter with 180? conduction mode. 07

Q.4 (a) Explain SVPWM Techniques in brief. 03
(b) Draw the waveform of Sine PWM for three-phase inverter. 04
(c) Write a short note on ZVS resonant inverter. 07
OR
Q.4 (a) Classify the DC-AC Converter (Inverter). 03
(b) Define any one External Control Techniques for Inverter. 04
(c) Write a short note on ZCS resonant inverter. 07
Q.5 (a) Write the Advantages & Disadvantages of Multilevel Inverter. 03
(b) Discuss quasi-square wave operation of inverter. 04
(c) Explain working of diode clamped multilevel inverter. 07
OR

Q.5 (a) Discuss high and low side Switch Drivers for Inverter. 03
(b) Discuss different methods of Inverter Control Techniques. 04
(c) Summarize various modulation techniques for internal control of
Voltage Source Inverter.
07


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