Industrial Electronics - May 2014
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.
1(a) SCR is a semi-Controlled device. Justify.(5 marks) 1(b) Enlist application of Rectifier diode, Zener diode, Light emitting diode, Photo diode. (5 marks) 1(c) Explain use of Multiplexer, De-multiplexer, Boolean algebra, Encoder.(5 marks) 1(d) Discuss effect of R-l & R-L-E load on full wave rectifier operation.(5 marks) 1(e) Compare AC and DC motors.(5 marks) 1(f) Mention power consumption of MSP 430 in different operating modes.(5 marks) 1(g) Explain application of BLDC motor & servmotor.(5 marks) 2(a) Explain any one application circuit of TRIAC-DIAC with waveform.(7 marks) 2(b) Draw different circuits of full wave controlled rectifier with R-load & calculate fining angle at which fully controlled full wave rectifier is to be operated to get output de voltage 110V from input voltage 230V,50Hz.(7 marks) 2(c) Explain register released to configuration of digital input/output port of MSP 430 microcontroller.(6 marks) 3(a) Draw circuit diagram and waveform of 3-phase bridge inverter with R-load (180° mode of conduction)(7 marks) 3(b) Explain frequency control scheme of 3phase induction motor with the help of block diagram.(7 marks) 3(c) Draw the circuit diagram and write the output voltage equation of inverting amplifier and summing amplifier.(6 marks) 4(a) Explain IC555 astable multivibrator.(7 marks) 4(a) Explain functional block diagram of MSP430 microcontroller.(7 marks) 4(c) Draw and explain block diagram of closed loop speed control of DC (with inner current loop)(6 marks) 5(a) Discuss interfacing of 3V system with 5V system and heavy loads like motors.(7 marks) 5(b) Write a short note on 'selection of motor & power rating for a pump'.(7 marks) 5(c) Discuss accuracy,resolution and lest significant bit regarding 10-bit ADC.(6 marks) 6(a) Compare the following:Power transistor,SCR,MOSFET and IGBT(7 marks) 6(b) Microprocessor and microcontroller.(7 marks) 6(c) TTL and CMOS technology.(6 marks)