Power Electronics

1st Level of Study, 2nd Year, Summer Semester

Students will acquire knowledge of the theory and applications of modern power semiconductor devices and methods for converting electrical energy forms and parameters using power electronic converters. They will gain an understanding of the operation of the most important and commonly used power electronic converters, their practical applications, fundamental characteristics, and control methods. Students will learn to analyze voltage and current waveforms in power electronic converters and to calculate their average and RMS values, which are essential skills for sizing power semiconductor devices. They will also learn to calculate electrical power for various waveforms of electrical quantities. During laboratory exercises, students will gain experience in working with modern measuring equipment, assembling electrical circuits according to circuit diagrams, and analyzing their characteristics. They will learn how to prepare laboratory reports, evaluate measured results, and draw appropriate conclusions. The course content is divided into six chapters. The introductory chapter covers modern semiconductor devices and their development. This is followed by the study of basic converter types: rectifiers, AC voltage controllers, inverters, and DC–DC converters. The final chapter focuses on practical applications of converters, including converters for DC and AC drives, power supplies, and renewable energy systems. The course also covers the fundamental control methods used in power electronic converters. As a result, students acquire comprehensive knowledge of converter systems used in industry. The knowledge and skills gained will also support their studies in other specialized courses offered by the department and help them better understand interdisciplinary relationships among technical subjects.

1. Power semiconductor devices (MOSFET, IGBT, thyristor, diode).
2. Operating principles of basic power electronic converters: rectifiers, AC voltage controllers, inverters, and DC–DC converters.
3. Operating principles of advanced power electronic converters: frequency converters, power supplies, and indirect DC converters.
4. Control methods for power electronic converters, power supplies, and frequency converters.
5. Applications of converters in electric drive systems: converters for the control of DC and AC drives.
6. Practical applications of converters: power supplies, converters for renewable energy sources, reactive power compensators, active filters and PFC converters, and the impact of converters on the power grid.
7. Measurements in power electronics: use of oscilloscopes, voltmeters, and ammeters, and methods for measuring electrical quantities.

[1] Dudrik, J. Výkonová elektronika: podklady na prednášky. 1. vyd. Košice: Technická univerzita v Košiciach, 2019. 98 s. [CD-ROM]. ISBN 978-80-553-3225-3.

[2] Pástor, M., Dudrik, J., Žatkovič, R. Výkonová elektronika 1: zbierka riešených príkladov a návody na cvičenia. 1. vyd. Košice: Technická univerzita v Košiciach, 2016. 115 s. [CD-ROM]. ISBN 978-80-553-2596-5.

[3] Dudrik, J. Výkonové polovodičové meniče: riešené príklady. Košice: Elfa, 2006.

[4] Dudrik, J. Výkonové polovodičové súčiastky. Košice: Mercury, 2001. ISBN 80-89061-26-5.

[5] Timko, J., Dudrik, J. Elektrické pohony a výkonová elektronika. Košice: Edičné stredisko Technickej univerzity v Košiciach, 1991. ISBN 80-7099-143-7.

[6] Dudrik, J., Bodor, M., Pástor, M. Soft Switching Full–Bridge PWM DC–DC Converter with Controlled Output Rectifier and Secondary Energy Recovery Turn-Off Snubber. IEEE Transactions on Power Electronics, Vol. 29, no. 8 (2014), p. 4116-4125. ISSN 0885-8993.

[7] Dudrik, J., Pástor, M., Lacko, M., Žatkovič, R. Zero-voltage and zero-current switching PWM DC–DC converter using controlled secondary rectifier with one active switch and nondissipative turn-off snubber, IEEE Transactions on Power Electronics, vol. 33, no. 7, pp. 6012-6023, July 2018.