5. Explain the operation of a Converter in which output voltage is less than
input voltage with circuit diagram and relevant waveform. Derive the
expression for Land C. (9)

6. 3)8 10 full wave controlled rectifier is connected to a highly inductive load.
i) Draw the output voltage, output current and input current for a firing

angle of 600. (5)

b)Explain the control methods of DC DC converter (4)
PART - ‏ع‎
‎7. a) Explain the methods of harmonic elimination in PWM inverters. (6)
b) Write short notes on Full bridge dc-dc converter (6)

Explain the operation of 3 phase inverter with 180 ° conducaon with circuit

diagram and relevant waveforms. (12)

a) Draw the circuit diagram and explain the operation of a pushpull converter for
conanuous conduction mode. Give relevant waveforms. Derive the voltage
transfer ratio (8)

b) Compare linear and switched mode power supplies (4)
2