
Course unit
PRINCIPLES OF ELECTRICAL SCIENCE (Ult. numero di matricola pari)
IN02106727, A.A. 2019/20
Information concerning the students who enrolled in A.Y. 2018/19
ECTS: details
Type 
ScientificDisciplinary Sector 
Credits allocated 
Educational activities in elective or integrative disciplines 
INGIND/31 
Electrotechnics 
6.0 
Course unit organization
Period 
Second semester 
Year 
2nd Year 
Teaching method 
frontal 
Type of hours 
Credits 
Teaching hours 
Hours of Individual study 
Shifts 
Lecture 
6.0 
48 
102.0 
No turn 
Prerequisites:

Basics of differential and integral calculus, complex numbers, vector operators: curl, gradient and divergence, general equations of electric and magnetic fields. 
Target skills and knowledge:

• Learn how to model real electric device using simplified electric circuits, learn the fundamental properties of electric circuits and the applicable methods for calculating of voltage, current and electric power.
• Apply such methods to define a model of a real electrical device and to numerically calculate voltage, current and electric power under various working conditions.
• Learn the working principles and evaluate the operational efficiency of electric motors, of power conversion systems and of electric machines used for generating and distributing electric power, including renewable power sources, energy storage and electric mobility.
• Learn the safety and protection features of the electric power networks and devices.
• Select industrial electric power devices and to solve relevant management problems. 
Examination methods:

• written test: numerical solution of 2 application problems (2 hours) , 2 open questions concerning the working principle of electric devices (1 hour)
• oral examination (short discussion on the written test and one question on the working principle and operational characteristics of electric devices ) 
Assessment criteria:

• written test: coherence of solution method, accuracy of numerical results, correctness of the description of the working principle.
• Oral examination: correctness of concepts, appropriateness of language 
Course unit contents:

Fundamentals of electric circuits, electric current, electric voltage, amperemeter, voltmeter. Electric power and wattmeter. Kirchhoff's laws, energy balance. Linear and nonlinear 2terminal elements, multiterminal elements. Resistors, Inductors, Capacitors, Diodes, ideal and real generators.
DC circuits, series and parallel connection, voltage divider and current divider. D/Y transformation; Methods for linear DC circuit analysis: superposition of effects, Thevenin and Norton equivalent circuits.
AC circuits: Steinmetz's transform for voltage and current, impedance, admittance. AC circuit measurements. Symbolic Kirchhoff's laws. Series and parallel connection. AC power: instantaneous, active, reactive, complex and apparent, power balance. Frequencydomain analysis of RLC circuits.
3phase systems, phasetophase and phasetoneutral voltage, equivalent singlephase circuit, power measurement, reactive power compensation,
Magnetic induction. Magnetic field (FaradayNeumann. Ampère e Gauss) in the presence of ferromagnetic materials, hysteresis loop. Inductor, magnetic energy. Mutual inductor, magnetic energy. Magnetic Circuits. Energy and force in magnetic circuits. Rotating magnetic field.
Power Transformers: operation principle, equivalent circuit, voltage drop, efficiency.
Fundamentals of rotating electrical machines: asynchronous and synchronous machines. Equivalent circuit model, electric and mechanical power, torque, efficiency.
Basics of ACDC and DCAC electric power conversion.
Production of electric power by renewable and nonrenewable sources, energy storage, electric mobility, worldwide and in Italy.
Fundamentals of power distribution systems: fault protection and safety codes for power distribution systems. Direct and indirect contacts, magnetothermal and differential. protection. 
Planned learning activities and teaching methods:

Classroom lecture using blackboard, slides are only for specific content.
Numerical exercises in classroom using blackboard. 
Additional notes about suggested reading:

all the lecture slides, blackboard images and other learning support material, including some written test problems of the previous years (with numerical results) will be available on MOODLE 
Textbooks (and optional supplementary readings) 

G. Chitarin, F. Gnesotto, M. Guarnieri, A. Maschio, A. Stella, Elettrotecnica 1. Principi. Bologna: esculapio, 2017.

G. Chitarin, F. Gnesotto, M. Guarnieri, A. Maschio, A. Stella, Elettrotecnica 2. Applicazioni. Bologna: Esculapio, 2018.

M.Fauri, F. Gnesotto, G. Marchesi, A. Maschio, Lezioni di Elettrotecnica  Esercitazioni.. Bologna: Esculapio, 2003.

Innovative teaching methods: Teaching and learning strategies
 Loading of files and pages (web pages, Moodle, ...)
Innovative teaching methods: Software or applications used
 Moodle (files, quizzes, workshops, ...)
Sustainable Development Goals (SDGs)

