POWER ELECTRONICSAnno accademico 2020/2021 - 2° anno
SSD: ING-IND/32 - Convertitori, Macchine e Azionamenti elettrici
Organizzazione didattica: 225 ore d'impegno totale, 146 di studio individuale, 49 di lezione frontale, 30 di esercitazione
Basic knowledge of the main power electronic devices. Advanced knowledge of electronic circuits for energy conversion in traction, transmission, and industrial/commercial applications (rectifiers, DC converters, inverters, heat exchange of equipment, and high-frequency transformers). Selection and sizing of the main active devices (diodes and switches). Sizing of the sinkers. Analysis of the behavior and design of the power converters. Analysis and design of the passive components. (inductors, trasformers, and capacitors). Design of the feedback loop.
Modalità di svolgimento dell'insegnamento
Classroom Lectures on the main topics of the course. Numerical exercises on ancillary topics by the use of the personal computer and dedicated software packages.
Should teaching be carried out in mixed mode or remotely, it may be necessary to introduce changes with respect to previous statements, in line with the programme planned and outlined in the syllabus
A basic understanding of electrical circuit analysis and control theory is an assumed prerequisite for this course.
Class attendance is highly recommended.
Contenuti del corso
Introduction to Power Electronics. Classification of converters. Semiconductors. Solid state devices for static power converters (diode, BJT, MOSFET, IGBT, Thyristors, GTO). Static characteristics and switching behavior. Thermal behavior. Multiple connection of power devices. Driving circuits and protection circuit. Static converters. unidirectional and bidirectional converters. Methods of analysis of the converters. Main families of static converters for electrical conversion and for applications to electric systems. Single stage and multistage converters. Outline of resonant converters. Inductors and transformers. Magnetic materials and ferrites, power losses. Copper windings, power losses due to both skin and proximity effects. Calculation of the steady-state temperature. Main applications. Home applications. Heating and air conditioning. High-frequency fluorescent lighting. Induction cooking. Industrial applications. Induction heating. Electric welding. Applications for power grids. High voltage transmission. Line-frequency converters with 12 pulses. Reactive power absorbed by the converter. Rectifier operation mode. Inverter operation mode. Control of HVDC converters. Electrical networks. Compensation of the lines and control of the electronically controlled power flow. FACTS controlled by thyristors. FACTS controlled converters. Interconnection of renewable energy sources and energy storage systems with the power grid. Interconnection of photovoltaic arrays.
Testi di riferimento
1) Ned Mohan, Tore M. Undeland. William P. Robbins, "Power Electronics: Converters, Applications, and Design". 3rd Edition, John Wiley & Sons, Inc., New York, November 2002.
2) Ned Mohan, Tore M. Undeland. William P. Robbins, “Elettronica di potenza: Convertitori e applicazioni”. Edizione italiana di Power Electronics 3rd Edition, Editore Hoepli, Milano, febbraio 2005.
5) Notes from the lectures.
Notes from the lectures on http://studium.unict.it/dokeos/2018/courses/syllabus/?cid=8763
Programmazione del corso
|1||Power Electronics Systems||Ned Mohan, Tore M. Undeland. William P. Robbins, "Power Electronics: Converters, Applications, and Design". 3rd Edition, John Wiley & Sons, Inc., New York – Main Reference Book.|
|2||Overview of Power Semiconductor Switches||Ned Mohan, Tore M. Undeland. William P. Robbins, ''Power Electronics: Converters, Applications, and Design''. 3rd Edition, John Wiley & Sons, Inc., New York – Main Reference Book.|
|3||Review Of Basic Electrical and Magnetic Circuit Concepts||Ned Mohan, Tore M. Undeland. William P. Robbins, ''Power Electronics: Converters, Applications, and Design''. 3rd Edition, John Wiley & Sons, Inc., New York – Main Reference Book.|
|4||Line-Frequency Diode Rectifier: AC/DC||Ned Mohan, Tore M. Undeland. William P. Robbins, ''Power Electronics: Converters, Applications, and Design''. 3rd Edition, John Wiley & Sons, Inc., New York – Main Reference Book.|
|5||Line-Frequency Phase-Controlled Rectifiers and Inverters: AC/DC|
|6||DC-DC Switch-Mode Converters|
|7||Switch-Mode DC-AC Inverters|
Modalità di verifica dell'apprendimento
The exam requires positive evaluation of an assigned project work in PSIM with report and presentation, followed by an oral examination.
Learning assessment may also be carried out on line, should the conditions require it.
Esempi di domande e/o esercizi frequenti
- Explain fully the working principle of the buck converter with the help of schematic and equivalent circuit diagrams;
- Describe the main characteristics of the output voltage In a 3 phase bridge rectifier;
- Provide a detailed study of step - down dc choppers