Power Electronics

Higher education teachers: Vončina Danjel, Zajec Peter

Subject description

Prerequisits:

• enrolment in the third study year of electrical engineering,
• student must complete the laboratory work before the final exam.

Content (Syllabus outline):

Power semiconductor devices. Properties, static and switching characteristics of power semiconductor devices: Diode, Thyristor, Triac, GTO, MOSFET, IGBT. Cooling of of power semiconductors, thermal impedance, thermal model of the cooling system. Fundamentals of power converters and control principles. Single- and multiphase AC/DC half and fully controlled converters with R, RL and RLE loads, continuous and discontinuous modes of operation, influence of freewheeling diode, active and reactive power, power factor, effect of source impedance commutation. DC/DC converters, principles of step-down and step-up converters, analysis of buck, boost, buck-boost, half- and full-bridge converters, control of DC/DC converters. Single- and multiphase DC/AC converters. PWM and other modulation principles, single and multilevel converters. Resonant converters, soft switching techniques (ZVS and ZCS). High power converters without DC link (cycloconverters, matrix converters). Applications of power converters in the field of power systems (passive and active compensators, active power filters).

Objectives and competences:

In this course students will learn basic competence of the following areas of power electronics needed in the master courses in the Electrical Engineering:

• power electronic devices and their static and dynamic characteristics,
• basic converter topologies and and their performance and
• basic converter control principles.

The student will be able to analyze performance of the power converters.

Intended learning outcomes:

• Student will be able to design fundamental power electronic circuits.
• Student will be able to evaluate and interpret experimental data and reach conclusions.
• Student will be able to solve power electronics related engineering problems.

Learning and teaching methods:

• Lectures, solving of applied problems regarding power electronics, laboratory exercises in small groups (danger of high voltage),
• practical work includes building and testing of different power converters and report writing.

Study materials

1. N. Mohan: Power Electronics - A first course, John Wiley & Sons, 2012
2. F. Lin Luo, H. Ye: Advanced DC/DC converters, CRC Press, New York 2003
3. N. Mohan, T. M. Undeland, W. P. Robbins: Power Electronics: Converters, Applications and 5. Design, John Wiley & Sons, New York, 1989.
4. T. Skvarenina: Power electronics handbook, CRC Press, New York, 2002
5. M. H. Rashid: Power electronics handbook, Academic Press, New York, 2001.