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Subject: ELECTROTECHNICS AND ELECTRICAL MACHINES (A.A. 2019/2020)

degree course in AUTOMOTIVE ENGINEERING

Course year 2
CFU 9
Teaching units Unit elettrotecnica e macchine elettriche
Energy Engineering (lesson)
  • TAF: Compulsory subjects, characteristic of the class SSD: ING-IND/32 CFU: 9
Teachers: Giovanni FRANCESCHINI
Exam type written
Evaluation final vote
Teaching language Italiano
Contents download pdf download

Teachers

Giovanni FRANCESCHINI

Overview

The course aims to provide basic knowledge on the principle of operation and modeling of the electric systems.
At first the basic electric components and circuits in steady state and dynamic conditions will be introduced both in time and frequency domain. Eventually magnetic circuit and their applications (static and rotating electrical machines) will be introduced.



Learning objectives, with reference to Dublin descriptors, are listed below.


Knowledge and understanding of the following topics:
1. Electric circuits in steady state conditions.

2. Electric circuits in dynamic conditions both in time and frequency domain.

3. The electric power in DC and AC systems.


4. RLC resonance, Power Factor correction

5. Three Phase Networks

6. Magnetic circuits

7. Single-phase and three-phase transformers

8.Rotating electrical machines

Admission requirements

Analisi Matematica I, Analisi Matematica II, Fisica Generale

Course contents

Using Matlab for the analysis of the electrical systems (2 hours)
Linear bipoles: resistors, inductors, capacitors, ideal and real voltage and current generators. Controlled generators.(6 hours)
Resistors in Series and Parallel: Voltage and current divider (2 hours)
Maximum Power Transfer Theorem. Linear and non linear (PV plant) example. Using Matlab for non linear example analysis (2 hours)
Kirchhoff's voltage law (KVL) and Kirchhoff's current law (KCL) (2 hours)
Thevenin and Northon theorems (4 hours)
A short review of Maxwell's loop current and nodal voltage methods (2 hours)
Some hints on Batteries for Automotive applications (2 hours)
Introduction to Alternating Current
Using Steinmetz transform for AC circuit analysis (4 hours)
Power in AC circuits (4 hours)
Power Factor Correction, Series resonance (4 hours)
Three-Phase AC Circuits: power and its measurement. Aron method, PFC, advantage of three-phase systems (7hours)
Transients: time domain approach (8 hours)
Frequency domain analysis (hints) (4 hours)
Magnetic Circuits (6 hours)
Single-phase transformer: equivalent circuit and design approach (4 hours)
No load and short-circuit tests. Efficiency and total voltage drop. Using Matlab to analyse transformer efficiency (6 hours)
Three-Phase transformers (2 hours)
Direct Current motors wound and permanent magnet type
principles of operation (2 hours)
equivalent circuit (2 hours)
torque generation in case of PM (separately) excited and series excited motor (2 hours)
Three-Phase winding, the rotating field and its alfa-beta model (4 hours)
Theory of Operation of an Induction motor and its equivalent model in steady-state conditions (2 hours)
Induction motor torque production (2 hours)
DC and AC Brushless (8 hours)

Teaching methods

Teaching involves theoretical frontal lessons and exercises carried out with the help of multimedia systems. The teaching material will be available at the end of each lesson through the "Dolly" platform (http://dolly.ingmo.unimore.it). The mathematical models introduced will be used for numerical modeling and computer simulation with Matlab/Simulink.

Assessment methods

The examination provides for the solution of a few electric circuits and an oral discussion on the course topics, aimed at verifying the knowledge of the course content. To successfully pass the examination, both tests must be sufficient. The final grade of the examination is determined as follows: 50% from the evaluation of the practical test report and 50% from the oral discussion.

Learning outcomes

The ability to perform the analysis of (linear) electric circuits in DC, AC or transient conditions.

The expertise to perform power computation and energy balance computation.

Knowledge of the structure and of the behavior of the main topologies of electrical machines both static and rotating.

Readings

Appunti del docente disponibili su Dolly (http://dolly.ingmo.unimore.it)
-Allan R. Hambley "Electrical Engineering Principles And Application" Paperback – 2016 PEARSON
Esiste anche in versione italiana:
-Elettrotecnica
di Allan R. Hambley (Autore), F. Grasso (a cura di), A. Luchetti (a cura di), M. C. Piccirilli (a cura di) PEARSON/Prentice Hall
G.Rizzoni "Elettrotecnica. Principi e applicazioni"
McGraw Hill education