1) a) Describe the several modes of the operation of thyristor with the help of static VI characteristics.
b) Sketch the two transistor model of SCR and calculate the α and β.
2) Sketch the basic structure of the power MOSFET and discuss the transfer and the output characteristics
3) Describe the working of the 1Φ full converter with the RL load and deduce the expression for average and for the rms value.
4) Describe the working of the 3Φ full converter for the RLE load by giving the waveforms.
5) Describe the operation of the Four Quadrant Chopper along with RLE Load.
6) Describe the working of the Single phase step up and step down cycloconverter with the help of neat and clean waveforms.
7) Discuss the operation of three phase 1800 with well explained waveform.
8) Explain what is meant by the PWM? Describe the different techniques with the help of neat waveforms.
9) Explain the several configurations of UPS with the help of block diagram.
10) With the help of neat circuit and waveforms, describe the mode inverter.
a) Flyback SMPS .
b) Push pull SMPS.