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06000EC307122001 Pages: 2

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APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Fifth Semester B.Tech Degree (S,FE) Examination January 2022 (2015 Scheme)

Course Code: EC307
Course Name: POWER ELECTRONICS & INSTRUMENTATION

PARTA
Answer any two full questions, each carries 15 marks.
Compare linear electronics and power electronics
Explain the turn off characteristic of a power diode with the help of waveform
Explain the working of a buck converter with the help of circuit diagram and
waveform
Explain the switching characteristics of a power MOSFET with relevant diagram
Illustrate the development of flyback converter topology with the help of
diagrams
List out the advantages of isolated converters
Explain the working of forward converter with the help of waveform
Explain the structure of IGBT
PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.
Explain the working of switched mode power supply with the help of a block

diagram

Describe the dynamic characteristic of a first order instrument. Define the time
constant. Give an example

Explain the working of single phase push pull inverter with the help of relevant
diagram

Describe the space vector modulation technique in three phase inverter

Explain the following Static characteristics with respect to a voltmeter
i. Accuracy

1. Precision
111. Resolution
iv. Sensitivity

v. Repeatability

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Duration: 3 Hours

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