STUPIDSID
Solve any one question from Q.1(a,b,c) & Q.2(a,b,c)
1(a)
Draw and Explain steady state characteristics of IGBT.
7 M
1(b)
Explain triggering circuit for SCR using IC 785.
6 M
1(c)
Draw a neat circuit diagram and explain single phase full bridge inverter with R-L load. Explain the effect of FWD on the operation of it.
7 M
2(a)
Explain with circuit diagram and waveforms three phase inverter with 180 degree conduction mode.
7 M
2(b)
Draw and explain the Steady State characteristics of SCR.
6 M
2(c)
Draw the circuit diagram of three phase Semi converter with R load. Explain its operation. Draw the output voltage waveform.
7 M
Solve any one question from Q.3(a,b) & Q.4(a,b)
3(a)
What is DC to DC converter? Explain 4 Quadrant Chopper with circuit diagram & waveforms.
9 M
3(b)
Draw the circuit diagram of single pahse AC Voltage controller with R load. Explain its operation. Draw the waveform of output voltage.
9 M
4(a)
In a dc chopper, the average load current is 30 Amps, chopping frequency is 250Hz, supply voltage is 110 volts. Calculate the ON and OFF periods of the chopper if the load resistance is 2 ohms.
8 M
4(b)
Dra the block schematic SMPS and explain its advantages over Linear Power Supply.
10 M
Solve any one question from Q.5(a,b) & Q.6(a,b)
5(a)
Explain OFF-line UPS with neat block-diagram. State its specifications and applications.
6 M
5(b)
Explain with circuit diagram working of single phase separately excited DC motor drive. Draw neat waveforms across load.
10 M
6(a)
What are AC drives? Explain with block diagram, speed control technique of three pahse Induction motor by using V/F method.
8 M
6(b)
Write short note on:
i) Electronic ballast and
ii) Battery Charger
i) Electronic ballast and
ii) Battery Charger
8 M
Solve any one question from Q.7(a,b) & Q.8(a,b)
7(a)
Explain SLR half bridge DC/DC converter with neat circuit diagram and Waveforms.
8 M
7(b)
What is EMI? Explain different sources and minimizing techniques of EMI.
8 M
8(a)
Explain with circuit diagram and neat waveforms ZCS resonant converters.
10 M
8(b)
Explain overvoltage and over current protection circuits.
6 M
More question papers from Power Electronics