Unit
- Course
- Electronic engineering for the internet-of-things
- Study-unit Code
- A003187
- Curriculum
- Industrial iot
- Teacher
- Federico Alimenti
- Teachers
-
- Federico Alimenti
- Luca Roselli (Codocenza)
- Hours
- 40 ore - Federico Alimenti
- 32 ore (Codocenza) - Luca Roselli
- CFU
- 9
- Course Regulation
- Coorte 2022
- Offered
- 2022/23
- Learning activities
- Caratterizzante
- Area
- Ingegneria elettronica
- Academic discipline
- ING-INF/01
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- ITALIAN
- Contents
- The course deals with the operating principles and the design fundamentals of power electronic circuits. The application of these circuits to complex systems is also illustrated.
After an introduction devoted to power devices (e.g. SCR, FET GaN, IGBT), the main circuits for the conversion between the two electrical energy forms, namely the Alternating Current (AC) and the Direct Current (DC) , are described: this constitutes the course "fil rouge".
In particular, the following conversion circuits are presented: from AC to DC (rectifiers), from DC to DC (linear and switching regulators), and from AC to AC (inverters and power amplifiers).
The teaching methods are based on: theoretical models, basic equations, design techniques and CAD examples. - Reference texts
- R.W. Erickson, D. Maksimovic, “Fundamentals of Power Electronics”, Springer New York, NY (2001), ISBN 978-1-4757-0559-1.
N. Mohan, T. Undeland, W. Robbins, “Power Electronics, Third Edition”, John Wiley & Sons (2003). - Educational objectives
- In this course the fundamental concepts about power electronics are presented; in particular we will focus on: power devices, rectifiers and controlled rectifiers, voltage multipliers, linear regulators, switching regulators, inverters and power amplifiers.
All topics are covered starting from physics and circuit theory, with the following objectives: to know the basic theoretical models of power devices and circuits, to learn circuit analysis, techniques, and design methods.
KNOWLEDGE
1) Know the main specifications and the basic models of power devices (diode and transistors) and heat dissipation apparatuses.
2) Know the main power circuits architectures.
3) Know the control and regulation of power systems; develop a comprehensive view of the matter.
SKILLS
a) Be able to identify the main design constraints that determine the sizing of power electronic circuits.
b) Be able to analyze and design the main circuit building blocks used in electrical energy conversion systems.
c) Consolidate the skills related to the usage of circuit simulation software, and know how to apply them in actual designs (CAD). - Prerequisites
- In order to understand and be able to apply the methods developed in the present course, it is necessary to have passed the electronics exams required by the three-year degree. Some program topics require knowledge of Fourier and Laplace series and transforms, as well as mathematical analysis (calculus) skills. These prerequisites are unavoidable for the student who wants to follow the this course successfully.
Students self-assess the prerequisites by taking a test on UniPG Unistudium. The teachers recommend personalized review activities based on the results of such a test. - Teaching methods
- The teaching is based on the following teaching methods:
1) lectures (physical principles, theory models and design methods);
2) CAD exercises (students will get a free annual license of the Keysight ADS software to be installed on their devices; teachers will carry out live CAD sessions, addressing the main aspects related to simulation and design of power circuits);
3) seminars with the main electronic industries in the sector (ON-Semi, Infineon, Ampleon). - Other information
- Attendance of classes is recommended.
Location: Department of Engineering, via G. Duranti 93, Perugia. Classrooms for lessons in accordance with the timetable of the course of study.
Reception: via the Teams platform, by appointment (email to the institutional addresses of the teachers). - Learning verification modality
- To pass the exam is necessary to take a full oral test, or to present a homework (in the form of a technical report) and to take a shortened oral test.
The full oral exam is a discussion of about 30 minutes aimed at ascertaining the level of knowledge and understanding reached by the student in relation to the theoretical, methodological and applicative contents of the program. The communication skills and language properties of the student will also be evaluated. Specifically, the oral consists of 3 questions and the consequent in-depth analysis.
The homework presentation is focused on a case-study proposed by the teacher, and typically related to the design of power electronic circuits using CAD. The homework can be carried out as individually or in groups and discounts part of the oral test (2 out of 3 questions). The homework discussion can make use of a presentation through slides (about 10); the exam committee members can request theoretical insights and detailed explanations. During this test the technical knowledge and understanding of the subject by the student, as well as the ability to apply the skills acquired and to develop original solutions will be evaluated. Language property and synthesis capabilities will also be considered. - Extended program
- 1) POWER DEVICES. Diodes and transistors as switches; parasitic elements: off capacitance, on resistance, package inductance. Controlled diodes (SCR and TRIAC), operating regions, elementary models, actuation methods. FET GaN, specificity, regions of operation, elementary models. IGBT, specificity, regions of operation, elementary models. Maximum ratings, thermal budget, heatsinks. Static and dynamic load line (curve). Relationship between breakdown voltage and cut-off frequency.
2) AC-DC CONVERSION. Single-phase and three-phase rectifiers. Controlled rectifiers using SCR and TRIAC. Voltage multipliers. H-bridges and hints to actuation of DC motors. Regulation by means of PWM.
3) DC-DC CONVERSION. Linear regulators: series regulators; shunt regulators; feedback and stability control; design models and criteria; examples. Switching regulators: buck, step-down and step-up; design models and criteria; examples. Generation of a negative voltage from a positive one. Power MOS driver for switching regulators: low-side and high-side. Control architectures, current sense, stability and relationship with the duty cycle. Noise generated by the commutations (hints).
4) DC-AC CONVERSION. Inverter and power amplifiers. Basic inverter architectures: oscillators and transformers, H-bridges and PWM. Basic architectures of power amplifiers: single-ended, parallel transistor, push-pull. Amplifiers with transistors used as non-linear current generators: classes A, AB, B, C. Amplifiers with transistors used as switches: classes D, E, F. Design criteria: device limits, dynamic load curve, harmonic termination, optimal load impedance.
5) EXERCISES CAD. Use of the ADS simulator to model power circuits. Problems with high dV / dt simulations (high slew-rate). Parasitic Effects. Design examples.