(௦) (6) Sketch the waveforms of ‏اعلا‎ and VL2.

b Explain the working of a push-pull type switched mode power supply. (4)

6 a. Explain the working of a Half bridge DC — DC switched mode converter with (5) circuit

diagram and waveforms.

b with circuit diagram and necessary waveforms, explain the operation of a buck- (4)

boost

PART-C (Module V and VI)

7 a. With circuit diagram and relevant waveforms, explain the operation of single (6) phase
capacitor commutated current source inverter with inductive load.

b Describe how the voltage is controlled in single phase inverter using sine triangle (6) ‏د‎
‎pwtvl.

8 9, Explain current control scheme in inverter using hysteresis current controller. (
b Explain harmonic reduction by stepped wave inverters. (6)

9 a. Explain the different voltage control methods in single phase inverters. (6) b.

Explain current control scheme in inverter using PWM current controller (6)