Industrial Electronics - Dec 2016

Mechanical Engineering (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Solve any five questionQ.1(a,b,c,d,e,f,g)

1(a) Draw characteristics of SCR, Triac, MOSFET and IGBT.(5 marks) 1(b) Draw connection of LED and a switch to MSP430.(5 marks) 1(c) Explain basic principle of single phase inverter.(5 marks) 1(d) Enlist characteristics of ideal op-amp.(5 marks) 1(e) Give an example of analog circuit, digital circuit. Combinational circuit and sequential logic circuit.(5 marks) 1(f) Draw torque-speed characteristics of DC shunt motor and 3-phase induction motor.(5 marks) 2(a) Explain in brief functional block diagram of MSP430.(7 marks) 2(b) Draw and explain block diagram of closed loop speed control of DC motor. Also state need of inner current loop.(7 marks) 2(c) Draw and explain any one application circuit of Triac- Diac.(6 marks) 3(a) Explain IC 555 as monostable multivibrator.(7 marks) 3(b) Explain frequency control scheme of 3-phase induction motor with the help of block diagram.(7 marks) 3(c) Write a short note on: Turn-off of SCR.(6 marks) 4(a) Draw the circuit diagram of differentiator and integrator> Write the output equation of each.(7 marks) 4(b) Enlist triggering methods of SCR and explain any one gate triggering method of SCR.(7 marks) 4(c) What do you understand by a Digital circuit? Elaborate following terms regarding digital circuits:-
i) logic level ii) noise immunity iii) propagation delay iv) power dissipation v) fan out.(6 marks) 5(a) Elaborate: Accuracy, Resolution and least significant bit regarding 10-bit ADC.(7 marks) 5(b) Write a short note on 'selection of motor and power rating for a pump'(7 marks) 5(c) Explain asymmetrical semi controlled converter with R load and derive equation of output voltage.(6 marks) 6(a) Compare-BLDC motor, DC motor and induction motor.(7 marks) 6(b) Compare-Microprocessor and Microcontroller.(7 marks) 6(c) Compare -TTL and CMOS technology.(6 marks)