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Electrotechnics

Code:

LACI11002

Sigla:

E

Áreas Científicas
Classificação	Área Científica
OFICIAL	Electric Power Systems

Ocorrência: 2022/2023 - 1S

Ativa?	Yes
Unidade Responsável:	Departamento de Engenharia Eletrotécnica
Curso/CE Responsável:

Ciclos de Estudo/Cursos

Sigla	Nº de Estudantes	Plano de Estudos	Anos Curriculares	Créditos UCN	Créditos ECTS	Horas de Contacto	Horas Totais
EACI	21	Plano de Estudos 14	1	-	6	75	162

Língua de trabalho

Portuguese

Objetivos

In the UC of Electrotechnics, a basic discipline in the field of engineering sciences, it is intended that students acquire fundamental skills in the field of Electrotechnical Engineering, namely to enable them to understand phenomena of an electromagnetic nature and to analyze electrical circuits in direct and alternating current. It is also intended that students are in possession of instruments (base knowledge and bibliographic guidelines) that allow the eventual continuation and deepening of studies. In structuring the UC, and in order to achieve the objectives, we seek to complement theoretical knowledge and problem solving with laboratory practice.

Resultados de aprendizagem e competências

Relate potential energy to electrical potential. Relate the difference in electric potential to the electric current in an electric resistance. Describe and explain the concepts, characteristics and properties of fundamental electrical quantities, as well as passive and active devices in electrical circuit models. Know techniques for analyzing electrical circuits, theorems and fundamental laws. Equate and solve electrical circuits in direct and alternating current, using different methodologies. Know how to solve resistive electrical circuits in alternating current, using different methodologies. Know the importance of alternating sinusoidal systems compared to continuous systems.
Represent the alternating sinusoidal quantities in complex notation, necessary for the analysis of circuits. Equate and solve sinusoidal forced regime circuits, using different methodologies and theorems.
Know the fundamental laws that govern the magnetic field and analyze a magnetic circuit.

Modo de trabalho

Presencial

Programa

1. Introduction to Electrotechnics
Framework and objectives.

2. Fundamentals of Electrostatics
Electric charge; electrostatic force; Coulomb's Law. Electric field; Electric potential; Electric tension. Condensers and dielectrics; capacitor association.

3. Stationary Electric Current
Electric Current Intensity; Electrical Resistance; Ohm's Law; Resistance Association; Voltage and current dividers. Electric power sources; Voltage and Current Sources; Electric circuit; Power and Energy; Joule's Law. Analysis of Resistive Circuits in DC. Kirchhoff's Laws. Overlay Theorem. Norton's and Thèvenin's theorems.

4. Magnetostatics
Classification of magnetic materials; Ampere's Law; magnetic flux; Magnetomotive force; Magnetic reluctance; Magnetic saturation; coils; Analysis of Magnetic Circuits; Hopkinson's Law. Analogy between electric and magnetic circuits.

5. Variable Electromagnetic Field
Faraday's Law; Coefficient of self-induction and mutual induction; Transformer working principle; Operating principle of mechanical electric power generators; Operating principle of motors (Laplace force).

6. Circuits in Quasi-Stationary Regime
Fundamental notions: sinusoidal alternating quantities; average value and effective value; complex or symbolic representation of an alternating sinusoidal function.
Analysis of Sinusoidal Alternating Single-Phase Circuits in Steady State. Circuit R; RL; CR; RLC; Notions of impedance and reactance; Association of impedances; Active, Reactive and Apparent Powers; Power factor.

Bibliografia Obrigatória

Elena Baikova ; Folhas de apoio à UC Eletrotecnia, 2020

Bibliografia Complementar

K. B. Santos; Análise de Circuitos Elétricos, , Minerva Editora
Sadiku; Elements of Electromagnetics, Saunders College Publishings
L. Bessonov; Electricidade Aplicada para Engenheiros. ISBN: 9726820219

Métodos de ensino e atividades de aprendizagem

In the classes of this UC, both theoretical-practical and laboratory, we will seek to encourage the active participation of students in their learning process, making use of their critical spirit. In theoretical-practical classes there will be a part associated with the presentation of the UC syllabus, always supported in another part, associated with problem solving. In laboratory classes, the student will have the opportunity to carry out eight laboratory works

Tipo de avaliação

Distributed evaluation without final exam

Componentes de Avaliação

Designation	Peso (%)
Teste	70,00
Trabalho laboratorial	30,00
Total:	100,00

Componentes de Ocupação

Designation	Tempo (Horas)
Estudo autónomo	87,00
Frequência das aulas	45,00
Trabalho laboratorial	30,00
Total:	162,00

Obtenção de frequência

There are two assessment components: a theoretical-practical one (TP) and a laboratory one (L).
The assessment of the theoretical component can be obtained through an exam, with a minimum passing grade of 9.5.
As an alternative to the regular period exam, the student may obtain success in the theoretical component by taking 2 interim tests (in person).
The minimum grade for each test is 8 values, with an average of more than 9.5 values in order to pass the theoretical component through continuous assessment.
Assessment by tests requires the attendance of at least 70% of the total number of classes.
The final grade of the laboratory will be obtained by carrying out the work with the delivery of the respective guide at the end of each class (with a weight of 40%) and the discussions of the work/continuous evaluation (60%)
Students must have an average of 9.5 or higher in the laboratories to pass the UC.

Fórmula de cálculo da classificação final

The final grade for the course will be calculated as follows:

Laboratory grade (NL), calculated based on the performance of the work and individual assessments
Theoretical grade (NT) of the final exam must be equal to or greater than 9.5 or the average of the marks of the two tests, rounded to the nearest unit.
Final classification:

The final grade of the course will be calculated as follows: Final Grade=0.7*NT+0.3*NL
Final exam grade or test average that must be greater than or equal to 9.5, with a weight of 70%.