Exam Details
| Subject | power electronics | |
| Paper | ||
| Exam / Course | b.e(electrical and electronics engineering) | |
| Department | ||
| Organization | SETHU INSTITUTE OF TECHNOLOGY | |
| Position | ||
| Exam Date | May, 2017 | |
| City, State | tamil nadu, pulloor |
Question Paper
Reg. No.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017
Fifth Semester
Electrical and Electronics Engineering
01UEE501-POWER ELECTRONICS
(Regulation 2013)
Duration: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 x 2 20 Marks)
1. Compare latching and holding current of SCR.
2. Draw TRIAC characteristics.
3. Why freewheeling diodes are preferred in rectifier circuits?
4. What is the effect of source impedance on the performance of converter?
5. Comment on forced commutation.
6. What is a DC chopper?
7. Define harmonics.
8. List the various advantage of using PWM control to inverters.
9. What is a matrix converter?
10. What is an AC voltage controller?
PART B x 16 80 Marks)
11. Describe the current commutation technique to turn off the SCR with neat sketch and waveform.
Question Paper Code: 31351
2
31351
Or Draw and explain the switching characteristics of IGBT with neat diagrams.
12. Describe the two modes of operation of single-phase full converter with inductive load. Or Explain the operation of three phase semi converter with neat waveforms.
13. Explain the working of Buck-Boost converter with sketch and waveforms and also drive the expression for Is. Or Describe the operation of voltage commutated chopper with relevant diagrams.
14. With neat sketches describe the working of three-phase inverter using 180 degree mode. Or Explain the working of multilevel inverter with neat diagram.
15. Discuss the operation of single-phase step-up and step-down cycloconverter. Or
Explain operating principle of single phase to single phase cyclo-converter with continuous and discontinuous load current with circuit and wave form.
B.E. B.Tech. DEGREE EXAMINATION, MAY 2017
Fifth Semester
Electrical and Electronics Engineering
01UEE501-POWER ELECTRONICS
(Regulation 2013)
Duration: Three hours Maximum: 100 Marks
Answer ALL Questions
PART A (10 x 2 20 Marks)
1. Compare latching and holding current of SCR.
2. Draw TRIAC characteristics.
3. Why freewheeling diodes are preferred in rectifier circuits?
4. What is the effect of source impedance on the performance of converter?
5. Comment on forced commutation.
6. What is a DC chopper?
7. Define harmonics.
8. List the various advantage of using PWM control to inverters.
9. What is a matrix converter?
10. What is an AC voltage controller?
PART B x 16 80 Marks)
11. Describe the current commutation technique to turn off the SCR with neat sketch and waveform.
Question Paper Code: 31351
2
31351
Or Draw and explain the switching characteristics of IGBT with neat diagrams.
12. Describe the two modes of operation of single-phase full converter with inductive load. Or Explain the operation of three phase semi converter with neat waveforms.
13. Explain the working of Buck-Boost converter with sketch and waveforms and also drive the expression for Is. Or Describe the operation of voltage commutated chopper with relevant diagrams.
14. With neat sketches describe the working of three-phase inverter using 180 degree mode. Or Explain the working of multilevel inverter with neat diagram.
15. Discuss the operation of single-phase step-up and step-down cycloconverter. Or
Explain operating principle of single phase to single phase cyclo-converter with continuous and discontinuous load current with circuit and wave form.
Subjects
- ac machines
- analog integrated circuits
- applied digital signal processing
- communication engineering
- conservation
- control systems
- data structures and algorithms
- dc machines and transformers
- digital logic circuits
- electric drives and control
- electric power utilization and energy
- electrical machine design
- electrical measurements and instrumentation
- environmental science and engineering
- field theory
- flexible ac transmission system
- fuzzy logic and neural networks
- high voltage engineering
- hvdc transmission
- microprocessors and microcontroller programming
- non-conventional energy resources
- numerical methods
- power electronics
- power plant engineering
- power system analysis
- power system operation and control
- programmable logic controller and scada
- project management and finance
- protection and switch gear
- qualitative and quantitative aptitude
- semiconductor devices and circuits
- special electrical machines
- transforms and partial differential equations
- transmission and distribution
- value education and human rights