Course detail

Power electronics

FEKT-BVELAcad. year: 2012/2013

Basic classification of power converters: AC/DC, AC/AC, DC/DC, DC/AC. Cascade of few converters. DC-bus. Static thermal phenomena. Cooling of semiconductors. Demanded thermal resistance of the heat sink. Active power; its calculation in special cases. EMC in LF region. Power factor, total harmonic distortion factor. Power switching devices, overview: diode, thyristor, triac, BJT, MOS-FET, IGBT, GTO.
Special chapters from the semiconductor theory. Chip structure of these power devices: fast diode, slow diode, symmetric thyristor, asymmetric thyristor, bipolar transistor, MOS-FET, IGBT, GTO. Detail analyse of the switch-on, and switch-off processes in the transistors. Switching loss calculation.
Rectifiers: non-controlled, controlled. Typical loads. Mean value of output voltage. Net rectifiers for supplying of transistor converters. AC/AC converters: 1-phase, 3-phase. Loads of R, L, R-L, R-L-Ui types. Phase control of triacs. DC/DC transistor converters. DC/AC transistor converters (1-phase, 3-phase). Control strategy of DC/DC, and DC/AC converters. PWM, sinusoidal PWM. Magnetic phenomena in the power electronics. Transformer theory. Mathematic models of the voltage transformer and current transformer. Switch-mode supplies. DC/DC converters with the pulse transformer. Single-end, and double-end buck converters.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

doc. Dr. Ing. Miroslav Patočka

Department

Department of Power Electrical and Electronic Engineering (UVEE)

Learning outcomes of the course unit

Understanding the function of basic semiconductor converters. Ability of the active design of converters.

Prerequisites

The subject knowledge on FEEC 2nd. year bachelor study level.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

5 x 3 points = 15 points for 5 laboratory tasks.
5 + 10 = 15 points for two semestral tests.
70 points for exam.
100 points total.

Course curriculum

1. Basic classification of power converters: AC/DC, AC/AC, DC/DC, DC/AC. Cascade of few converters. DC-bus.
2. Static thermal phenomena. Cooling of semiconductors. Demanded thermal resistance of the heat sink.
3. Active power; its calculation in special cases.
4. EMC in LF region. Power factor, total harmonic distortion factor.
5. Power switching devices, overview: diode, thyristor, triac, BJT, MOS-FET, IGBT, GTO.
6. Rectifiers: non-controlled, controlled. Typical loads. Mean value of output voltage.
7. Rippling of the load current. Demanded inductance of the choke. Type power of transformer.
8. Main rectifiers for supplying of transistor converters. Two-pulse, and six-pulse rectifier with the capacitor.
9. AC/AC converters: 1-phase, 3-phase. Loads of R, L, R-L, R-L-Ui types. Phase control of triacs.
10. DC/DC transistor converters. DC/AC transistor converters (1-phase, 3-phase).
11. Control strategy of DC/DC, and DC/AC converters. PWM, sinusoidal PWM.
12. Magnetic phenomena in the power electronics. Transformer theory. Mathematic models of the voltage transformer and current transformer.
13. Switch-mode supplies. DC/DC converters with the pulse transformer. Single-end, and double-end buck converters.

Work placements

Not applicable.

Aims

To give the students the basic knowledge in the area of power elektronics.

Specification of controlled education, way of implementation and compensation for absences

The attendance at the all numerical and laboratory exercises is required.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Patočka M.: Magnetické obvody Elektronický učební text, FEKT, VUT Brno (CS)
Patočka M.: Vybrané statě z výkonové elektroniky, sv. 1, skriptum FEKT, VUT Brno (CS)
Patočka M.: Vybrané statě z výkonové elektroniky, sv. 2, skriptum FEKT, VUT Brno (CS)
Patočka M.: Výkonová elektronika, 1. část - usměrňovače, střídavé měniče napětí, skriptum FEKT, Brno, 2010 (CS)
Vrba, J.: Výkonová elektronika 1b. Elektronický text VUT FEKT Brno 2003 (CS)

Recommended reading

Bose, B.K.: Power electronics and AC Drives. Prentice Hall 1986 (EN)
K.Heumann,A.Stumpe:Thyristoren,B.G.Teubner (DE)
Z.Čeřovský,J.Pavelka : Výkonová elektronika 1, skripta ČVUT (CS)

Classification of course in study plans

  • Programme EECC Bc. Bachelor's

    branch B-MET , 3 year of study, winter semester, elective interdisciplinary
    branch B-TLI , 3 year of study, winter semester, elective interdisciplinary
    branch B-AMT , 3 year of study, winter semester, elective interdisciplinary
    branch B-SEE , 2 year of study, winter semester, compulsory
    branch B-EST , 3 year of study, winter semester, elective interdisciplinary

  • Programme EEKR-CZV lifelong learning

    branch EE-FLE , 1 year of study, winter semester, compulsory

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

doc. Dr. Ing. Miroslav Patočka

Syllabus

1. Basic classification of power converters: AC/DC, AC/AC, DC/DC, DC/AC. Cascade of few converters. DC-bus.
2. Static thermal phenomena. Cooling of semiconductors. Demanded thermal resistance of the heat sink.
3. Active power; its calculation in special cases.
4. EMC in LF region. Power factor, total harmonic distortion factor.
5. Power switching devices, overview: diode, thyristor, triac, BJT, MOS-FET, IGBT, GTO.
6. Rectifiers: non-controlled, controlled. Typical loads. Mean value of output voltage.
7. Rippling of the load current. Demanded inductance of the choke. Type power of transformer.
8. Main rectifiers for supplying of transistor converters. Two-pulse, and six-pulse rectifier with the capacitor.
9. AC/AC converters: 1-phase, 3-phase. Loads of R, L, R-L, R-L-Ui types. Phase control of triacs.
10. DC/DC transistor converters. DC/AC transistor converters (1-phase, 3-phase).
11. Control strategy of DC/DC, and DC/AC converters. PWM, sinusoidal PWM.
12. Magnetic phenomena in the power electronics. Transformer theory. Mathematic models of the voltage transformer and current transformer.
13. Switch-mode supplies. DC/DC converters with the pulse transformer. Single-end, and double-end buck converters.

Fundamentals seminar

14 hod., compulsory

Teacher / Lecturer

Ing. Petr Procházka, Ph.D.

Syllabus

1. Static thermal phenomena. Cooling of semiconductors. Demanded thermal resistance of the heat sink.
2. Active power; its calculation in special cases.
3. Controlled rectifiers. Design. Rippling of the load current. Demanded inductance of the choke. Type power of transformer.
4. Main rectifiers for supplying of transistor converters. Design. Two-pulse, and six-pulse rectifiers.
5. DC/DC transistor converters. Design.
6. DC/AC transistor converters. Design.
7. Magnetic phenomena in the power electronics. Choke design.Transformer design.

Laboratory exercise

12 hod., compulsory

Teacher / Lecturer

Ing. Petr Procházka, Ph.D.

Syllabus

1. Controlled rectifier. Control characteristics. Load characteristics. Influence of load type to DC values.
2. Uncontrolled rectifiers. Basic features.
3. AC voltage inverter. Control characteristics. Analysis of output values.
4. DC/DC converter. Control and load characteristics. Analysis of output values.
5. DC/AC converter. Analysis of output values. Basic characteristics.