Power Electronics & Control Engineering — Summer 2018

Explain different methods of triggering the SCR in detail.

Explain the construction and characteristics of the TRIAC.

Explain construction and V-Icharacteristic of UJT.

Draw & explain torque-speed characteristics of DC motor.

Describe the design of Variable speed AC motor drives.

Explain leading & trailing tube circuits.

Explain working principle and operation of Ignitron.

Explain energy storage welding system.

Write short note on thermocouples and strain gauge.

Explain the basic principle of operation of induction heating and list the advantages of induction heating.

Explain control of heating by using SCR, DIAC & TRIAC.

Explain dielectric heating with necessary diagram.

Explain the working principle of stepper motor with necessary diagram.

Draw and explain the pin diagram of microprocessor 8085.

Explain Program Counter in detail. What is the function of stack pointer in 8085 microprocessor?

Draw and explain the architecture of 8085.

Explain ladder diagram and ignitron contactors.