Jawaharlal Nehru Technological University Hyderabad 2005-1st Sem B.Tech Applied Electronics and Instrumentation IIISupplementary s, il/ - INDUSTRIAL ELECTRONICS - university paper

Code No: RR312202 Set No.2
III B.Tech. I Semester Supplementary Examinations, May -2005
INDUSTRIAL ELECTRONICS
(Instrumentation & Control Engineering)
Time: three hours Max Marks: 80
ans any 5 ques.
All ques. carry equal marks
? ? ? ? ?
1. (a) discuss the operation of a 2 stage D.C amplifier using Miller compensation
technique.
(b) List out the specifications of a D.C amplifier.
2. (a) Tabulate the differences ranging from linear mode power supply and SMPS.
(b) discuss the various kinds of SMPS.
(c) What is a switching regulator? Why it is called so? Enumerate and discuss
its advantages.
3. (a) Draw the monolithic IC regulator with variable output and current limiting
features and discuss it in detail.
(b) List fixed and variable IC voltage regulators.
4. (a) Which thyristor rating is in danger of being exceeded when a load is inductive,
and what is the conventional limiting technique?
(b) elaborate the various signals which can be used for turning on an SCR by
gate control? Compare them.
5. discuss the operation of three-phase , half-wave controlled converter with induc-
tive load. Sketch the associated waveforms and derive expressions for the avg.
voltage output.
6. Design a snubber circuit and discuss its operation and provide its applications.
7. (a) discuss the resistance welding process.
(b) Draw the basic circuit of ac resistance welding and discuss it.
8. (a) List the merits of Induction Heating.
(b) discuss the main principle behind induction heating.

Earning:   Approval pending.