Exam Details
| Subject | Power Electronics | |
| Paper | ||
| Exam / Course | BTCVI / BTECVI / BTELVI | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
1. Explain the two-transistor analogy of a thyristor. Explain anyone of the turn-on methods.
2. What is meant by commutation of SCR Draw the circuits and explain any two methods of forced. commutation of thyristors.
3. A full wave rectifier with centre tapped transformer, is feeling a resistive load of resistance R. Assuming that diode has zero forward resistance and infinite reverse resistance,
find the expressions for Vdc, Idc, Vrms, Irms and efficiency.
If the peak value of transformer secondary voltage from mid-point to each end is 100 V and R =5ohm, find Vdc, Idc, Vrms, Irms and efficiency.
4. Draw and explain the wave shapes of supply voltage, output voltage, load current, current through SCR, current through freewheeling diode and voltage across SCR of a single-phase half wave controlled rectifier feeding R-L load.
5. Draw the circuit diagram of a single-phase dual converter and explain its working for both modes of operation.
6. What is McMurray full bridge 1-phase inverter? Draw its diagram and discuss its operation.
Draw and explain the characteristics of IGBT.
A parallel inverter has input d.c. voltage of 40 V. It is desired that the output voltage be 230 50 Hz and peak load current 2 A. Design a. parallel inverter. Choose the correct ratings of thyristor.
8. Why is forced commutation necessary for choppers Discuss the operation of an auxiliary commutated chopper. Draw the circuits showing the different modes of operation.
9. What is an a.c. regulator? Give some of its applications.Draw a circuit diagram and explain the working of static on load tap changer for transformers.
10. Draw and explain the operation of speed. control of a d.c.series motor by a single-phase full converter for the continuous motor current. Also draw the associated voltage and current waveforms.
2. What is meant by commutation of SCR Draw the circuits and explain any two methods of forced. commutation of thyristors.
3. A full wave rectifier with centre tapped transformer, is feeling a resistive load of resistance R. Assuming that diode has zero forward resistance and infinite reverse resistance,
find the expressions for Vdc, Idc, Vrms, Irms and efficiency.
If the peak value of transformer secondary voltage from mid-point to each end is 100 V and R =5ohm, find Vdc, Idc, Vrms, Irms and efficiency.
4. Draw and explain the wave shapes of supply voltage, output voltage, load current, current through SCR, current through freewheeling diode and voltage across SCR of a single-phase half wave controlled rectifier feeding R-L load.
5. Draw the circuit diagram of a single-phase dual converter and explain its working for both modes of operation.
6. What is McMurray full bridge 1-phase inverter? Draw its diagram and discuss its operation.
Draw and explain the characteristics of IGBT.
A parallel inverter has input d.c. voltage of 40 V. It is desired that the output voltage be 230 50 Hz and peak load current 2 A. Design a. parallel inverter. Choose the correct ratings of thyristor.
8. Why is forced commutation necessary for choppers Discuss the operation of an auxiliary commutated chopper. Draw the circuits showing the different modes of operation.
9. What is an a.c. regulator? Give some of its applications.Draw a circuit diagram and explain the working of static on load tap changer for transformers.
10. Draw and explain the operation of speed. control of a d.c.series motor by a single-phase full converter for the continuous motor current. Also draw the associated voltage and current waveforms.
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
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Subjects
- Advance Microprocessor And Architecture
- Analog and Mixed Mode VLSI Design
- Analog Communication
- Analog Electronic Circuits
- Analog Integrated Circuits Design
- Antennas and Propagation
- B10-Informatics
- Basics Of Electronics Engineering
- Computer Architecture
- Computer Communication Networks
- Control Engineering
- Data Communication And Network
- Device Modelling For Circuit Simulation
- Digital Electronics
- Digital Signal Processing
- Digital System Design
- Electromagnetic Field Theory
- Electronic Measurement and Inst
- Electronic Switching Circuits
- Embedded System Design
- Information Theory And Coding
- Linear Integrated Circuits
- Microcontrollers
- Microprocessor And Its Applications
- Microwave And Radar Engineering
- Multirate Systems
- Optical Fiber Communication
- Power Electronics
- Satellite And Tv Engineering
- Signal And Systems
- Wireless Communication