GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI (OLD) EXAMINATION - WINTER 2018
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Subject Code:160902 Date: 15/12/2018Subject Name: Power Electronics - 11
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Explain the working of three phase inverter with 120 degree mode of conduction with necessary waveform and circuit. [07]
(b) Explain in brief: Matrix Converter. [07]
Q.2 (a) What is PWM technique? Explain space vector PWM technique. [07]
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(b) Explain single phase full wave controller with diagram and waveform. Derive RMS output voltage equation. [07]OR
(b) Draw and explain parallel inverter in RL load with wave form. [07]
Q.3 (a) Write short note on V/F control of induction motor. [07]
(b) Explain the close loop speed control of synchronous motor drive operating on Cycloconverter. [07]
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OR
Q.3 (a) Give comparison between AC drives and DC drives. [07]
(b) Explain slip power recovery control and rotor resistance control for induction motor. [07]
Q.4 (a) What is FACTS device? Explain any one in detail. [07]
(b) Compare the following. [07]
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(1) VSI and CSI(2) Cycloconverter and DC link inverter
OR
Q.4 (a) Enlist various types of HVDC systems & discuss any one in brief. [07]
(b) Discuss induction heating and RF heating in detail. [07]
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Q.5 (a) Explain single phase to single phase Cycloconverter with wave form and diagram. [07]
(b) Write short notes on classification of inverter. [07]
OR
Q.5 (a) Write short note on three phase Cycloconverter. [07]
(b) Discuss on — off control based single phase AC voltage controller with necessary diagrams. [07]
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This download link is referred from the post: GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
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