Anna University
Department of Electrical and Electronics Engineering
Department of Electrical and Electronics Engineering
Subject Code : EE2301
Semester:5
Year:3
Department:EEE
Subject Name : Power Electronics
Time : 1 Hour
Max Marks : 35
PART A (5*2=10)
1. What is meant by time ratio control in dc-dc converters?
2. What is meant by buck regulator?
3. What is meant by resonant switching?
4. Compare ZVS and ZCS.
5. Give two applications of DC chopper-circuits.
PART B
6. Explain the operation of ZCS with necessary waveform (9)
7. a) Draw the circuit diagram of a buck converter and explain its operation with equivalent circuit for different modes and waveforms. (16)
(Or)
(b) Explain the current limit control and time limit control chopper. (16)
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