No. of Pages: 2

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIRST SEMESTER M,TECH DEGREE EXAMINATION, JUNE/JULY 201 8

Branch: Electrical & Electronics Engineering
Stream: Power Control and Drives

OIEE6501: POWER CONVERTER CIRCUITS

Answer any two full questions from each part
Limit answers to the required points.

Max. Marks: 60 Duration: 3 hours

PART-A
1. a) Explain the effect of source inductance ina Id)half bridge diode rectifier having
highly inducave load. Draw the relevant waveforms (6)
b) Explain line current distortion. (3)

2. A full bridge diode rectifier has a purely resistive load. Determine

i) Efficiency. ii) Form factor iii) Ripple factor. tv) Transformer utilisation factor v)
PIV of each diode. The rectifier delivers a current of 60A at an output voltage of
280.7۷ and source frequency' 60+112. (9)

3. a) Draw and explain the stayc and dynamic characteristics of an ideal switch
(5)
b) Briefly explain the losses present in a practical switch (4)
PART - 8

4. Explain the operation of a Boost converter with circuit diagram and relevant

waveforms. Derive the expression for L& C (9)