BASIC ELECTRICAL ENGINEERING (Electrotechnics)
Academic Year 2023/2024 - Teacher: Salvatore COCOExpected Learning Outcomes
The course contents is addressed towards basic circuit theory, together with an overview of electromagnetic fields formulations used to solve basic static and time-varying electromagnetic problems arising in an engineering context. Fundamental concepts used in electronics, communications, electrical and electronic measurements, control theory are also introduced.
Knowledge and understanding
The student will learn the basic engineering methodologies, through which he will build the specific skills of the course.
Applying knowledge and understanding
At the end of the course the students will be able to solve circuits in time and frequency domains using the most appropriate circuital analysis methodology.
Making judgements
The exercises are aimed at developing critical skills and autonomous paths on the basis of available data
Communication skills
Several examples are given aimed at properly communicating results
Learning skills
The training course is structured so that further studies in this area can be autonomously undertaken with great ease.
Course Structure
Classroom lectures and numerical exercises aimed at developing circuital analysis skills
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.
Required Prerequisites
Detailed Course Content
Lumped circuits
The lumped circuital model: Voltage and Current. Idealized electrical components. Kirchhoff's Current and Voltage Laws.
One and two port electrical components
Electric power and energy, passive and active elements: independent Current and Voltage sources, Linear time-invariant one and two port elements: resistors, capacitors, and inductors, ideal transformer, coupled inductors, dependent sources. Simple networks: Voltage division of series components, Current division of parallel components Equivalent circuits: Series & Parallel connections for one port components Star-Delta & Delta-Star Transformations. Nonlinear and Time-varying components: ideal diode, ideal circuit breaker
First and second order linear time-invariant circuits.
RC, RL and RLC circuits. State variables. Differential equations and initial conditions. Natural Frequencies..Zero-input, zero state and complete response. Step and impulse reponses. Convolution integral .
Circuit analysis and network theorems
Network graphs and Tellegen's theorem. Nodal and mesh analysis Node Voltage and Mesh Current Methods. Substitution Theorem. Superposition theorem. Norton & Thevenin theorem.
Alternating currents circuits
Alternating Current (AC), Voltage, sinusoidal Waveforms, Frequency, Period, Phase Angle of sinusoidal Waveforms Phasor (Vector) Diagram & Complex Numbers for AC Circuits Analysis. Impedance and admittance concepts. Active and reactive Power. Complex Power and Apparent Power Boucherot Theorem, Power Factor Correction. MTP Theorem. Resonant circuits. Periodic Waveforms, Fourier Analysis for linear circuits
Three-phase circuits: Three and four wires star and delta configurations. Three-phase circuit analysis and Millmann formula. Three-phase power and Aron's theorem.
Two port networks
Representation of linear time-invariant two port networks. Two port networks interconnections. Reciprocity theorem.
Electromagnetic fields
Electrostatic and magnetostatic fields and applications. Laplace and Poisson Equations. Magnetic Circuits. Time-varying electromagnetic fields electromagnetic potentials, Poynting theorem homogeneous and non-homogeneous wave equations, radiation, Hertz’s dipole, transmission lines.
Textbook Information
1. C.A. Desoer, E.S. Kuh , Fondamenti di Teoria dei Circuiti, Franco Angeli Editore,
2. A. Laurentini, A.R. Meo, R. Pomè, Esercizi di elettrotecnica, Levrotto&Bella
3. R.Perfetti, Circuiti Elettrici, Zanichelli.
4. J.A. Edminister, Circuiti Elettrici, coll. Schaum's, McGraw-Hill.
5. Ramo, Whinnery, Van Duser, Campi e onde nell’elettronica per le comunicazioni Franco Angeli Editore
Course Planning
| Subjects | Text References | |
|---|---|---|
| 1 | Lumped circuits | 1, 3 |
| 2 | One and two port ideal components | 1,3,4 |
| 3 | First and second order circuits | 1,3,4 |
| 4 | General network analysis methods, network Theorems | 1,4 |
| 5 | Sinusoidal regime analysis | 3,2 |
| 6 | two ports networks | 1,3 |
| 7 | Electromagnetic Fields | 5 |
Learning Assessment
Learning Assessment Procedures
The exam is carried out in two steps. In the first step, two circuits have to be solved one in the time domain and the other in the frequency domain. After that an oral discussion is started in which some theoretical items are to be illustrated, one point concerns electromagnetic fields.
To ensure equal opportunities and in compliance with current laws, interested students may request a personal interview in order to plan any compensatory and/or dispensatory measures based on educational objectives and specific needs. Students can also contact the CInAP (Centro per l’integrazione Attiva e Partecipata - Servizi per le Disabilità e/o i DSA) referring teacher within their department.
Examples of frequently asked questions and / or exercises
Thevenin-Norton Theorem
Non-homogeneous wave equations for the electromagnetic potentials
Impulse response
Convolution integral
Resonant circuits
Frequency response analysis
Two-port networks