F 03000EE364052005 Pages: 2

Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Sixth Semester B.Tech Degree Regular and Supplementary Examination July 2021

Course Code: EE364
Course Name: SWITCHED MODE POWER CONVERTERS
Max. Marks: 100 Duration: 3 Hours

Graph Sheets will be provided

PART A
Answer all questions, each carries 5 marks. Marks
1 A boost converter operating under continuous conduction mode with an input voltage (5)

of 100 V switched at 30 kHz of switch frequency is having an output voltage of 250
V. If output current is 2A, determine the value of output capacitor. Given inductor

ripple current is 0.2A and capacitor ripple voltage is 0.60V.

2 Explain the advantages of switched mode power converters. (5)
3 Analyse the working of half bridge 60-00 converter with circuit diagram and (5)
waveform.
4 Derive expression for switching utilisation ratio of three phase full-bridge inverters. (5)
5 Explain hysteresis current control of voltage source inverter. (5)
6 Compare DC utilisation of space vector modulation with sine PWM modulation. (5)
7 Explain the advantages of resonant converters. (5)
8 Explain parallel resonant circuit. (5)
PART 8

Answer any two full questions, each carries 10 marks.
9 a) Explain the working of buck -boost converter under continuous conduction mode of (5)

operation with circuit diagram and relevant waveforms.

b) Design a buck converter working in conduction mode of operation with following (5)
specifications: Input voltage = 50 V, output current = 3 A, output voltage = 25 V,
switching frequency = 50 kHz, inductor ripple current = 0.3 A & capacitor ripple

voltage = 0.25 V

10 ல Explain working of cuk converter with circuit and neat waveforms. Derive the output (5)

voltage to input voltage relation.

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