Unit ELECTRICAL ENGINEERING

Course: Industrial engineering
Study-unit Code: 70687012
Curriculum: In all curricula
Teacher: Pietro Burrascano
CFU: 12
Course Regulation: Coorte 2021
Offered: 2022/23
Type of study-unit: Obbligatorio (Required)
Type of learning activities: Attività formativa integrata

ELECTRICAL ENGINEERING

Code	70367106
CFU	6
Teacher	Pietro Burrascano
Teachers	Pietro Burrascano
Hours	54 ore - Pietro Burrascano
Learning activities	Caratterizzante
Area	Ingegneria elettrica
Academic discipline	ING-IND/31
Type of study-unit	Obbligatorio (Required)
Language of instruction	Italian
Contents	Lumped circuit theory, components and electrical quantities, analysis of analog circuits, the calculation of the response of a linear system to excitations constant over time and sinusoidal; study of external representations (theorems of Thevenin and Norton). Power in sinusoidal steady state.
Reference texts	Teaching materials prepared by the professor. optional text G. Martinelli e M. Salerno, Fondamenti di Elettrotecnica - Circuiti a costanti concentrate lineari e permanenti (Vol. I), Ed. Siderea. Buck, Daniel, Singer, Computer Explorations in Signal and Systems Using MATLAB, Prentice-Hall
Educational objectives	The first module of course "Electrical Engineering" provides the basic elements for the analysis of linear circuits necessary for power and control of industrial processes and products. The main knowledge gained will be: -Having understood the fundamentals of the theory of linear analog and stationary circuits. -Having understood the basic rules for studying such circuits in the time domain and in steady sinusoidal regime, and the related energy issues
Prerequisites	Mathematics I, Physics I, first elements of Mathematics II, first elements of Physics II
Teaching methods	Lectures, classroom exercises and laboratory (once the pandemic crisis is over)
Other information	Attending lectures is strongly recommended
Learning verification modality	The exam consists of a written test and an oral test. The written test consists of one or more exercises aimed at verifying the ability to apply in practice the theoretical concepts acquired in Parts I and II. The oral test consists of questions relating to theoretical aspects inherent in the topics covered in the individual modules and aimed at ascertaining the student's knowledge and understanding of them, as well as the ability to present their content. The tests are conducted according to the following rules: -Written test duration (Parts I and II): 2 hours and 30 minutes. -Oral test (Parts I and II) typically 7 days after the written test. The exact date is announced on the day of the written test. The result of the written is announced at the oral examination. -In case of a failed examination, the student is entitled to keep the result of the written test as part of the current session. In case he/she reappears for a new written test, the previous one is cancelled. For information on support services for students with disabilities and/or DSA visit http://www.unipg.it/disabilita-e-dsa
Extended program	Lumped circuits. Electrical. Power. Ideal components bipolar and constitutive relations, coordinated conventions. Ideal transformer. Kirchhoff's laws. Fundamental properties of circuits. Typical signals. Introduction to analog circuits analysis: Elements of topology. DC resistive circuits: analysis methods based on loops and nodes. Analysis in the time domain of circuits with memory. Response of a linear system to sinusoidal excitation. Free and forced response. Transient response and permanent response. Circuits in sinusoidal regime. Sinusoids and phasors. Kirchhoff's laws and phasor. Constitutive relations of elements in the phasors domain. Power in sinusoidal steady state. Instantaneous power, active, reactive, complex. Rms. Conservation of complex power. Theorem of the maximum transfer of active power. Power factor correction. Phase systems. Theorems of Thevenin and Norton. Laboratory: Introduction to the use of table top instrument (power supplies, multimeters, signal generators, oscilloscopes). Analog circuits implemenation: mount on breadboard.

Code	70697806
CFU	6
Teacher	Antonio Faba
Teachers	Antonio Faba
Hours	54 ore - Antonio Faba
Learning activities	Caratterizzante
Area	Ingegneria elettrica
Academic discipline	ING-IND/31
Type of study-unit	Obbligatorio (Required)
Language of instruction	Italian
Contents	Electrical machines: transformers, synchronous machine, asynchronous machine, continous current machines. Static energy conversion: rectifiers, inverters and choppers.
Reference texts	Ermanno Cardelli, "Elementi di elettrotecnica, macchine elettriche", Edizioni Agraf 2002
Educational objectives	Knowledge and competence on electrical machines. - Knowledge on functional principle of the electrical machines - Knowledge on the main mechanical characteristics of the electrical machines - Knowledge on the energy performances of the electrical machines - Equivalent circuits computations starting from the conventional tests - Computations of functional parameters and energy performances using the equivalent circuits of the electrical machines. - Base aspects about power convertors design
Prerequisites	The exam Physica II
Teaching methods	4 lesson cycles for transformers, synchronous machines, asynchronous machines and DC machines. At the end of each cycle an exercitation is given to compute the main functional parameters and efficiency performances of the electrical machines. Finally a lesson cycle about static power converters.
Learning verification modality	The written test consists of one or more exercises aimed at verifying the ability to apply in practice the theoretical concepts acquired in Parts I and II. The oral test consists of questions relating to theoretical aspects inherent in the topics covered in the individual modules and aimed at ascertaining the student's knowledge and understanding of them, as well as the ability to present their content. The tests are conducted according to the following rules: -Written test duration (Parts I and II): 2 hours and 30 minutes. -Oral test (Parts I and II) typically 7 days after the written test. The exact date is announced on the day of the written test. The result of the written is announced at the oral examination. -In case of a failed examination, the student is entitled to keep the result of the written test as part of the current session. In case he/she reappears for a new written test, the previous one is cancelled. For information on support services for students with disabilities and/or DSA visit http://www.unipg.it/disabilita-e-dsa
Extended program	Teaching unit: electrical machines (45 hours) The single-phase transformer. No load operation. Load operation. Operation in short circuit. Equivalent networks of the transformer. Voltage reduction in load operation. Three-phase transformers. Transformers in parallel. Autotransformer. Transformers for measurements. Conventional tests. Efficiency. Data sheet. Constructive knowledge of the transformers. Classification of transformers. Synchronous machine. No load operation. Load operation. Magnetomotive actions. Operation in short circuit. Free behavior of the alternator. Behavior of an alternator in parallel on a network of voltage and frequency prevalent. V-curves and polar diagrams. Energy balance and efficiency. Details of a synchronous machine. Construction details. Asynchronous machine. No load operation. Operation with a locked rotor in short circuit. Magnetomotive actions in the machine short-circuited rotor locked. Operating with the moving rotor. Equivalent networks of the three-phase asynchronous machines. Energy balance and mechanical characteristics of asynchronous machines. Starting the engine cage. Speed control of induction motors. Single-phase motors. Experiments on asynchronous machine. Experimental determination of the equivalent network. Performance of the asynchronous machine. Other operations of the asynchronous machine. Specification of asynchronous machines. Construction details. Continous current machines. General and construction details. No load operation. Excitation of the current machines. Load operation. General equations of the machine with separate excitation and parallel exitation. External features of the machine with separate excitation and parallel exitation. Electromechanical characteristics of the speed of the machine with separate excitation and parallel exitation. Electromechanical characteristics of torque of the machine with separate excitation and parallel exitation. Mechanical characteristic of the machine with separate excitation and parallel exitation. General equations of the machine in series with excitement. Characteristic curves of the machine excited in series. Commutator motors powered by alternating current. Performance of current machines. Details of continous current machines. Teaching unit: Static energy conversion (9 hours) Junction diodes. Junction transistor. AC/DC Converters: half-wave rectifiers, full wave rectifiers, three-phase rectifier circuits, controlled rectifiers. DC/AC Converters: Inverter, PWM technique. Uninterruptible Power Supply. AC/AC Converters: Load regulation in AC, phase cutting technique. DC / DC converters: chopper, energy recovery techniques.