INDUSTRIAL ELECTRONICS
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- Versione italiana
- Academic year
- 2015/2016
- Teacher
- GIORGIO VANNINI
- Credits
- 6
- Didactic period
- Secondo Semestre
- SSD
- ING-INF/01
Training objectives
- The subject deals with the fundamentals for the design of electronic power converters which are used in power supplies, motor drives and industrial applications. The main components are analyzed with particular emphasis on power supplies, switching and control circuits as well as power electronic devices.
In the field of the static conversion of electrical energy, the student will learn:
- fundamentals, technology and application of power electronic devices and circuits;
- issues related to energetic efficiency and thermal management;
- analysis and design of switching power converters/supplies and their control.
The main acquired skills (i.e., the capability of applying what has been learnt) will be:
- design of electronic power converters;
- filter design;
- control design;
- thermal transistor management. Prerequisites
- Diodes, BJTs and FETs: fundamentals. Switching in electron devices. Circuit and signal theory. Fundamentals of control theory: feedback, stability and compensation. Basic analog circuits.
Course programme
- 48 hours of teaching are given, divided in lectures (36 hours), and guided lab (12 hours).
Fundamentals of power converters (3 hours): Applications, classification, distortion, power factor, efficiency.
Switching power converters (14 hours): general properties of DC/DC, DC/AC, AC/DC and AC/AC conversion. DC/DC switching converters: Buck. Full bridge. Boost. Buck-boost. DC/DC converters with electrical isolation (fly-back). Synchronous DC/DC converter. Filter and snubber design. Device ratings. Current and voltage control. Analysis of an integrated controller. Hysteretic control. Digital control (hints).
Magnetic components, power transistors and drivers (6 hours): electromagnetism basics, inductor design principles, transformer models. Diode, BJT, MOS, IGBT. Ratings. Switching networks. Driver and isolation (hints).
Electrical engines (2 hours): DC and AC engines: basics, equivalent circuits; equations and/or fundamental characteristics (torque, velocity), braking.
DC/AC converters (6 hours): Single-phase DC/AC converters. PWM and sinusoidal PWM control. UPS.
Line frequency rectifiers (3 hours): Half- and full-wave rectifiers: analysis and design. Diode ratings. Design criteria for LC and C filters. Effects of the source inductance. LC input filter. Three-phase rectifier. Diode ratings and LC filter design. Power factor.
Controlled line frequency rectifiers (1 hour): SCR and GTO. AC/DC and AC/AC converters.
DC/DC regulators (1 hour): Zener regulators. Zener regulators with current amplifier. Feedback DC/DC regulators. Integrated regulators.
Laboratory (12 hours): design, realization and testing of a fly-back converter. Didactic methods
- The course is organized as follows:
frontal lectures on all the topics of the course;
classroom converter design examples;
design laboratory. Under the supervision of a teaching tutor and mostly in the electronics lab. Students will work alone or in small groups (maximum 3 students). The students are required to provide a report on the lab work. Learning assessment procedures
- The final examination is in oral form. Questions on the course topics are aimed at evaluating the comprehension of the topics and the gained skills.
If the student provides the lab report, slides 39-61 (on DC/DC converters) and slides A1-B25 (on components) are not subjects of oral questions.
Exams are given weekly. The examination list closes two days before the scheduled date.
Passing the exam is proof of having acquired the ability to apply knowledge related to energy static conversion, and to the design of switching power converters. Reference texts
- Didactic material provided by the teacher.
Specific topics can be further developed in the following texts:
Elettronica Industriale: Convertitori DC/DC operanti in commutazione, F.Filicori e G.Vannini, Editrice Esculapio, Luglio 1999, Bologna (main part of the course).
Elettronica di Potenza: Convertitori ed applicazioni, Mohan, Undeland, Robbins, Hoepli, 2005.
Power Electronics: Converters, Applications and Design, Mohan, Undeland, Robbins, J.Wiley, 1995.
Fundamentals of power electronics, R.Erickson, Kluwer, 1999.
Power Electronics: Circuits, devices and applications, M.Rashid, Prentice Hall, 1993.
