Cognitive Level:
REMEMBER
1. Draw the layer structure of power diode
2. List types of power diode and their applications
3. List the types of Power transistors and their applications
4. Draw the transfer characteristic curve and list the applications of MOSFET
5. Draw the structure of IGBT and list the applications of IGBT
6. Draw the layer diagram of SCR
7. Enumerate Reverse blocking ,Forward blocking, forward conduction mode
8. Define GTO and list its applications
9. Draw the layer structure of TRIAC and list its applications
10. state the preferred modes of turn-on of TRIAC
11. Draw the V-I characteristic curve of DIAC and list its applications
12. Draw the layer diagram of UJT and list the applicationsof UJT
Cognitive Level:
UNDERSTAND
1. Describe the concept of power electronics.
2. Draw V –I characteristics of power diode and explain
3. Explain BJT switching characteristics
4. Explain with circuit diagram the operation of BJT as a switch
5. Explain the operation of N-channel enhancement MOSFET
6. Draw and Explain the structure of IGBT
7. Draw the layer diagram of SCR and explain the concept of two transistor analogy
8. Explain the static V-I characteristic curve of SCR
9. Explain the principle of operation GTO
10. Draw the layer structure of LASCR and explain its operation
11. Draw V-I characteristics & explain 4-Modes of turn on of TRIAC
12. Explain the operation of DIAC
13. Explain the construction of UJT
14. Draw & explain the V-I characteristics of UJT 15. List the differences between MOSFET, BJT and IGBT
Unit 2 - SCR CONTROL CIRCUITS
Cognitive Level:
UNDERSTAND
1. Explain the methods of turn on of SCR
2. Draw and explain the general layout of firing circuit
3. Describe commutation
4. Identify the types of commutation
5. Explain line commutation and forced commutation
6. Explain Load commutation and complementary commutation
Cognitive Level:
Analysis
1. Draw R firing circuit and explain with wave forms.
2. Draw R-C firing circuit and explain with wave forms
3. Draw synchronized UJT pulse trigger circuit and explain with waveforms
4. Draw the Digital firing scheme and explain with wave forms CO3- Generalize the protection of Thyristors
Unit 3 -Ratings, Protection& mounting of thyristors
Cognitive Level:
REMEMBER
1. Define reliability and MTBF
2. List the different types of mounting of SCR
Cognitive Level: UNDERSTAND
1. Explain voltage and current ratings of SCR
2. Explain reliability of SCR
3. Describe how SCR can be protected against overvoltage and overcurrent, di/dt& dv/dt
4. Explain the different types of mounting of SCR CO4- Analyze the working of DC and AC Converters
Unit 4 -CONVERTERS
Cognitive Level: UNDERSTAND
1. Explain the types of power electronic converters
2. Explain single quadrant semi converter, two quadrant full converter and dual converter.
3. Explain two quadrant full converter
4. Explain dual converter
5. Explain smart power modules
6. Draw the circuit diagram of single phase Dual converter and explain the principle of operation.
7. Explain the gating pulse requirement of 3 phase full converters
8. Draw the circuit of step down chopper and explain its operation
9. Draw the circuit of step up chopper and explain its operation
10. Draw the different chopper configurations- (A , B , C , D and E) and explain them
11. Explain VSI
12. Explain CSI
13. Explain cycloconverters
Cognitive Level: Analysis
1. List the advantages and disadvantages of power electronic converters
2. Explain principle of phase control with waveforms for resistive load
3. Explain single phase full converter RLE type with continuous load current
4. Draw the circuit diagram of three phase bride converter and explain 180 conduction mode with wave forms
5. List the differences between VSI and CSI
6. Draw the circuit diagram of half bride inverter and its operation with wave forms
7. Draw the circuit diagram of full bride inverter and its operation with wave forms
8. Draw the circuit diagram of three phase 180 0 mode voltage source inverter and its operation with wave forms
9. Draw the circuit of mid- point step down cycloconverter and explain its operation with waveforms
10. Draw the circuit of mid- point step up cycloconverter and explain its operation with waveforms.
11. List the advantages and disadvantages of cyclo converters
Cognitive Level: UNDERSTAND
1. Draw the Block diagram of SMPS and explain its operation
2. Draw the circuit diagram of Buck -boost converter (regulator) and explain its operation.
3. Describe the different types of power line disturbances
4. Describe how power conditioners provide effective suppressing of some or all electrical disturbances
5. Describe the operation of relay type AC voltage stabilizer with the help of diagram.
6. Draw the diagram of AC servo voltage stabilizer and explain its operation
7. Draw the block diagram of OFF line UPS and explain its operation
8. Draw the block diagram of ON line UPS and explain its operation
Cognitive Level: Analysis
1. List the applications of SMPS
2. List the sources and effects of power line disturbances
3. List the advantages and disadvantages of Relay type stabilizer
4. List the advantages and disadvantages of servo stabilizer
5. Determine Battery size and required voltage for UPS
Unit VI–APPLICATIONS
Cognitive Level: UNDERSTAND
1. Explain with block diagram static excitation system for alternators
2. Draw the schematic diagram of bi polar HVDC system and explain its operation
3. Draw the circuit diagram and explain single phase high frequency photo voltaic interfaceto grid
4. Draw and explain the circuit for interconnection of wind and hydro generator
5. Draw the block diagram of interconnecting energy storage systems for utility load levelling
6. Draw the block diagram & explain the operation of Switch mode welder
7. Draw the block diagram and explain the operation of Voltage source series resonant inverters in induction heating
8. Explain the operation of Thyristor switched capacitors and thyristor switched inductors
9. Draw the circuit and explain the operation of DC Solid state Relay using opto coupler
10. Draw the circuit and explain the operation of AC Solid state Relay using opto coupler
11. Draw the block diagram of High frequency lighting system and explain its operation.
Cognitive Level: Analysis
1. Draw the circuit diagram of static AC circuit breaker and explain its operation with waveforms
2. Explain speed control of shunt wound DC motor by armature voltage control method.
3. Explain with circuit diagram soft starting of Induction motor
4. Explain with circuit diagram static slip recovery
5. Explain speed control of Induction Motor by Variable voltage frequency method.
6. Draw the circuit diagram and explain the speed control of 3 phase slip ring induction motor by static variation of external rotor resistance
7. Draw the circuit & explain SCR charger circuit for 12 V battery.