Power Electronics 2

Lecturer:

Jiří Lettl (gar.)

Tutor:

Jiří Lettl (gar.), Jan Bauer, David Havelka

Supervisor:

Department of Electric Drives and Traction

Synopsis:

Rectifiers with active load, discontinuous and continuous current, multiple commutation, three-phase AC/AC converters, electrostatic separators, welding rectifiers, battery chargers, superconductive magnetic energy reservoir, induction heating, reactive power compensation, contactless switches, softstarters, resistor pulse control, cathodic prevention, power transistor in switching mode, snubbers, structure and control principles of modern controlled drive, pulse width modulation methods, principles of vector control and direct control, pulse width modulated rectifiers, matrix converters, converter protection against current overload and against overvoltage

Requirements:

Credit conditions: Attendance by the study laws, activity by the exercise solution, right worked and checked measurement transactions. Defense of the semestral project

Syllabus of lectures:

1. Rectifiers with active load, discontinuous and continuous current mode

2. Three-phase bridge rectifier working at multiple commutation

3. Three-phase AC/AC converters, diagram of work at resistive load and at inductive load, backward influence

on the feeding network

4. Utilization of power semiconductor converters in non-drive applications, electrostatic separators, welding rectifiers,

battery chargers, superconductive magnetic energy reservoir, induction heating

5. Reactive power compensation, contactless switches for phase control and cycled control, softstarters

6. Resistor pulse control, cathodic and other types of prevention against electrochemical corrosion

7. Power transistor in switching mode, switch on and switch off processes, influence of the load type, limit values,

permissible operation area

8. Loss and lossless snubbers for switching off and snubber for switching on, realisation of the three-phase bridge

transistor voltage source inverter

9. Modern controlled drive, its components, function structure, control principles, pulse width modulation methods

10. Principle of vector control, basic structures, transformation of asynchronous machine equations to various

coordinate systems and used mathematical models

11. Principle of direct torque control, basic structures

12. Principle of pulse width modulated rectifiers, rectifiers with pulse width modulation of current type and with pulse

width modulation of voltage type

13. Control and design principles of matrix converters

14. Power semiconductor converter protection against current overload and against external and commutation

overvoltage

Syllabus of tutorials:

1. Instructions to the labs, security directions, laboratory rules, laboratory identification, work with oscilloscope

2. One-phase controlled bridge rectifier with serial R+L load and parallel R+C load

3. Control of one-phase controlled bridge rectifier with variable resistive load to the constant current

4. Influence of the input leakage inductance on the commutation time of the three-phase bridge rectifier

5. Serial resonance bridge inverter

6. Parallel resonance bridge inverter

7. Compensation circuit with rectifier

8. Compensation circuit with AC/AC converter

9. Load current control by the AC/AC converter in transformer secondary circuit at resistive load

10. Load current control by the AC/AC converter in transformer secondary circuit at inductive load

12. Control of the system with indirect frequency converter including pulse width modulated voltage source inverter

11. Control of the system with pulse width modulated rectifier

13. Load current control by the AC/AC converter in transformer primary circuit at resistive load

14. Credit

Study Objective:

Study materials:

1. Ned Mohan, William P. Robbins, Tore M. Undeland:

WIE Power Electronics: Converters, Applications and Design, Media Enhanced , 3rd Edition,

John Wiley & Sons, Inc., New York, March 2003

2. Bimal K. Bose:

Power Electronics and Variable Frequency Drives : Technology and Applications

John Wiley & Sons, Inc. -IEEE Press, New York, September 1996

3. Andrzej M. Trzynadlowski:

Introduction to Modern Power Electronics

John Wiley & Sons, Inc., New York, May 1998

Note:

Time-table for winter semester 2011/2012:

	06:00–08:0008:00–10:0010:00–12:0012:00–14:0014:00–16:0016:00–18:0018:00–20:0020:00–22:0022:00–24:00
Mon
Tue
Fri	roomT2:F1-114 11:00–12:30 ODD WEEK (lecture parallel1) Dejvice haly Konzultační K315
Thu
Fri

Time-table for summer semester 2011/2012:

Time-table is not available yet

The course is a part of the following study plans:

• Elektrotechnika, energetika a management - Technologické systémy_144957 (compulsory course in the program)
• Elektrotechnika, energetika a management - Elektrické stroje, přístroje a pohony_145019 (compulsory course in the program)
• Elektrotechnika, energetika a management - Elektroenergetika_145039 (compulsory course in the program)