6.

b. Explain the operation of a push- pull converter with circuit diagram and (5)
relevant waveforms.

a. Explain the operation of a fly back converter with circuit diagram and relevant (4)
waveforms.

b. Describe with relevant diagrams and waveforms the working of a buck-boost
(5) converter.

PART 0
a. Explain the operation of three phase voltage source inverter with 120° (7) conduction
mode with the help of circuit diagram and relevant waveforms.

b. Describe how the voltage is controlled in 10 inverter using sine-triangle pulse
(5) width modulation technique.

a. Explain the operation of single phase capacitor commutated CSI with resistive 6)
load.

b. Describe the working of a single phase full bridge Voltage Source Inverter.
(6)

a. Explain the working of a current controlled VSI with hysteresis control (8 ) scheme.

b. What are the advantages of Current Source Inverter? Mention its applications. (4)