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Electrotechnics

Code:

ARCI03

Sigla:

ELET

Áreas Científicas
Classificação	Área Científica
CNAEF	Electricity and energy

Ocorrência: 2022/2023 - 1S

Ativa?	Yes
Unidade Responsável:	Departamento de Engenharia Eletrotécnica
Curso/CE Responsável:	Automation, Robotics and Industrial Control

Ciclos de Estudo/Cursos

Sigla	Nº de Estudantes	Plano de Estudos	Anos Curriculares	Créditos UCN	Créditos ECTS	Horas de Contacto	Horas Totais
ARCIL	28	Plano de Estudos_2015_16	1	-	6	60	162
TSPARC	21	Plano de Estudos_2015_16	1	-	6	60	162

Língua de trabalho

Portuguese

Objetivos

The course unit of Electrotechnics is a sciences engineering field base. The learning of the methods and physical concepts underlying it, aims to develop in students fundamental skills that allow them to understand the electromagnetic phenomena and master the main techniques of electrical circuits analysis in direct and alternating current.

Resultados de aprendizagem e competências

The student, at the end of this course should be able to;
1- Understand/explain the fundamentals of electrostatics.
2- Describe the effects of stationary current and analyze direct current electrical circuits.
3- Understand/explain the fundamentals of magnetostatics.
4- Describe the effects of a variable magnetic field.
5- Analyze sinusoidal alternating single-phase circuits in steady state.
6- Perform laboratory practices to consolidate and complement theoretical knowledge.

Modo de trabalho

Presencial

Pré-requisitos (conhecimentos prévios) e co-requisitos (conhecimentos simultâneos)

Knowledge of solving equations systems, analysis of complex numbers and basic concepts in the field of electrical engineering.

Programa

1. Introduction to Electrotechnics course.
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. Thevenin and Norton 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 Single-Phase Alternating Circuits in Steady State: Circuit R; RL; CR; RLC; Notions of impedance and reactance; Association of impedances; Active, Reactive and Apparent Powers; Power factor. Three-phase circuits (balanced three-phase system).

Bibliografia Obrigatória

Máximo Rosado; Folhas teóricas de apoio às aulas teóricas-práticas
Nelson Martins; Introdução à Teoria da Eletricidade e do Magnetismo. . ISBN: 9788521202110

Métodos de ensino e atividades de aprendizagem

The teaching methodology used, in the context of theoretical-practical classes, is based on the application of various active learning techniques aiming at greater involvement and autonomy of students in the construction of their knowledge, on the one hand. On the other hand, students work their resources in the process of critical reflection of the laws and rules of electrotechnics in the acquisition of competences during the exercise of learning activities. In laboratory classes, the student will have the opportunity to carry out laboratory work.

Software

PHET
Octave

Tipo de avaliação

Distributed evaluation without final exam

Componentes de Avaliação

Designation	Peso (%)
Teste	65,00
Trabalho laboratorial	35,00
Total:	100,00

Componentes de Ocupação

Designation	Tempo (Horas)
Estudo autónomo	52,00
Frequência das aulas	60,00
Trabalho laboratorial	50,00
Total:	162,00

Obtenção de frequência

1- The continuous assessment regime
Students who intend to attend the UC under continuous assessment are subject to class attendance and are required to carry out all assessments of the two components:
- Theoretical-practical component (Tp) is evaluated by three mini-tests (MT) and a worksheet (Fc). The component grade is given by the weighted average of the mini-tests and form according to:

Tp = 0.3 MT1 + 0.3 MT2 + 0.3 MT3 + 0.1 Fc;

- Laboratory component (L) with mandatory laboratory work. The evaluation of the laboratories is composed by the performance in class and the documents presented of the different laboratory tests that verify the concepts given in the chapter "Stationary Electric Current".

2- Assessment regime by exams with mandatory laboratory work Students who choose the assessment system by exams will take a written test in which all the subjects corresponding to the Tp component will be evaluated. Examination tests are carried out at scheduled times at School level. For any evaluation moment (mini tests or face-to-face exam), a student may be asked to take an oral test, to be arranged, to confirm the knowledge revealed in the summative assessments. The classification of the oral test replaces the classification of the evaluation moment in question. If the student does not attend the oral test, without due justification, the evaluation in question will be cancelled.

Fórmula de cálculo da classificação final

Final grade (NF) under continuous assessment of the subject is given by:
NF = 0.65 Tp + 0.35 L .

The final grade (NF) in assessment by exams will be the classification obtained at the time of the exam (NE) and the one obtained in the mandatory Laboratory component (L) or equivalent as;
NF = 0.65 NE + 0.35 L

Students who have obtained NF ≥9.5 values will be approved with the final classification (NF) determined by rounding up to units.

Observações

By the end of the second week of classes, students covered by special statutes (student worker, association manager, high-level athletes, etc.) must inform the unit course responsible for their specific situation and respective implications for the evaluations.
The contents and teaching materials to support the study can be found on the Electrotechnics page on moodle.