Scribd
Upload
94 views2 pages

Ee 6503

The document outlines the syllabus for the course EE 6503 - Power Electronics. It contains three parts - Part A with 10 short answer questions, Part B with 5 long answer questions, and Part C with 2 long numerical problems. Some of the topics covered include inverter grade and converter grade SCRs, turn-off times of devices and circuits, effects of source resistance, four quadrant converter operation, ZCS converter configurations, feedback and freewheeling diodes, UPWM inverter output voltage equations, TRAIC limitations for high power, and matrix converter merits and demerits.

Uploaded by

Attagasam Arjun
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
94 views2 pages

Ee 6503

The document outlines the syllabus for the course EE 6503 - Power Electronics. It contains three parts - Part A with 10 short answer questions, Part B with 5 long answer questions, and Part C with 2 long numerical problems. Some of the topics covered include inverter grade and converter grade SCRs, turn-off times of devices and circuits, effects of source resistance, four quadrant converter operation, ZCS converter configurations, feedback and freewheeling diodes, UPWM inverter output voltage equations, TRAIC limitations for high power, and matrix converter merits and demerits.

Uploaded by

Attagasam Arjun
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

Department of Electrical & Electronics Engineering

EE 6503 - POWER ELECTRONICS

PART-A 10 X 2 =20 Marks

1. What is inverter grade and converter grade SCR?


2. Why circuit turn-off time should be greater than device turn-off time?
3. What is the effect of source resistance on single phase and three phase converter?
4. List the advantage of circulating current mode operation of four quadrant
converter.
5. Why SCR based dc-dc converter is not so popular in now-a days?
6. Draw the switch configuration ZCS converter.
7. Difference between feedback diode and freewheeling diode.
8. Write down the RMS output voltage equation of UPWM based single phase
inverter.
9. Why TRAIC based ac voltage controllers not recommended for high power
applications?
10. Write down the merits and demerits of matrix converter.

PART-B (5 X 13 =65 Marks)

11. a) Explain the construction and working of power semiconductor device, the device
which is employed for low power speed control of fan regulator applications.
Or
b) Explain any two methods of firing circuits employed for triggering latching
device.
12. a) Explain the effect of source inductance on low power two quadrant converter in
detail.
Or
b.) Describe the operation on high power multi-quadrant converter with neat
waveform.
13. a) Explain the working of capacitor based SCR commutated chopper with detailed
modes of operation.
Or
b) What is switching mode regulators? Explain the operation of inverting regulator
with detailed design.
14. a) Explain the operation of H-Bridge inverter with the case studies of under damped
and critical damped load. Derive an expression for Fourier analysis of rms output
voltage.
Or
b) Explain the harmonic mitigation technique used in single phase H-Bridge
inverter.
15. a) Explain the operation of three stage ac voltage controller with neat sketch.
Or
b) Explain the operation of continuous and discontinuous mode of operation of singe
stage variable voltage and variable voltage control of converter with neat sketch.

PART-C (1 X 15 =15 Marks)

16. a) The two pulse-two quadrant converter is connected to a 230v, 50Hz supply. The
load current Ia is continuous and its ripple content is negligible Express the input
current in a Fourier series; determine the HF of the input current, DF and input
power factor. If the firing angle is 30 degree. Calculate Vdc, Vn, Vrms, HF,DFand
PF.
Or

17. The single phase popular inverter which has a resistive load of 10 ohm and the
input voltage of Vs=100 volt. Determine a) the rms output voltage at the
fundamental frequency b) output power c) the average and peak current of EACH
IGBT d) the pea reverse blocking voltage of each switch e) THD f) the HF and DF of
the LOH.

You might also like