Electrothecnics

Code:

LEM22221

Sigla:

ELET

Áreas Científicas
Classificação	Área Científica
OFICIAL	Electric Power Systems

Ocorrência: 2023/2024 - 2S

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
EM	65	Plano de Estudos	2	-	6	75	162

Docência - Responsabilidades

Docente	Responsabilidade
Svetlana Roudolfovna Chemetova

Docência - Horas

Theorethical and Practical :	3,00
Practical and Laboratory:	2,00

Type	Docente	Turmas	Horas
Theorethical and Practical	Totais	1	3,00
Theorethical and Practical	Svetlana Roudolfovna Chemetova		3,00
Practical and Laboratory	Totais	4	8,00
	Svetlana Roudolfovna Chemetova		4,00
	Tiago Ferreira Félix da Costa Reis		2,00
	José Manuel dos Santos Martins		2,00

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)

Basic knowledge about solving systems of linear equations, vector analysis, complex numbers and basic physics concepts.

Programa

CHAPTER I - ELECTROSTATIC
Units System. Electric charge. Coulomb's Law. Electric field. Potential. Work and potential energy. Capacitors. Capacity calculation. Association of capacitors. Dielectric materials.

CHAPTER II - DIRECT CURRENT CIRCUIT ANALYSIS
Electric current. Electric tension. Electrical resistance. Ohm's Law. Resistance Association. Voltage and current dividers. Joule effect. Power and energy. Electrical energy sources. Star-delta equivalent circuits. Kirchhoff's laws. Mesh analysis and nodal analysis. Superposition theorem. Thevenin and Norton theorems. Font conversion. Circuits with dependent sources. Power balance.

CHAPTER III - ELECTROMAGNETISM
Magnetostatics: Classification of magnetic materials; Ampere's Law; Magnetic flux; Magnetomotive force; Coils; Analysis of Magnetic Circuits; Hopkinson's Law.
Variable Electromagnetic Field: Faraday's Law; Lenz's Law; Coefficient of self-induction and mutual induction; Transformer working principle; Operating principle of mechanical electric power generators; Operating principle of motors.

CHAPTER IV - ALTERNATING CURRENT
Periodic quantities. Symbolic representation. Definition of impedance. Study of RL, RC and RLC circuits. Resonance. Electric power. Power factor. Three-phase circuits.

Bibliografia Obrigatória

Prof. Máximo Rosado; Folhas teóricas de apoio às aulas teóricas-práticas
Sadiku Musa Alexander; Análise de Circuitos Eléctricos com Aplicações

Bibliografia Complementar

Robert L. Boylestad; Introdução à Análise de Circuitos
Prof.ª Svetlana Chemetova; Fundamentos de Corrente Alternada Sinusoidal

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.
In laboratory classes, the student will have the opportunity to carry out laboratory work.

Software

Software de simulação Easy EDA

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

1- The continuous assessment regime
Students who intend to attend the UC under continuous assessment are subject to 75% class attendance and are required to carry out all assessments of the two components:
- Theoretical-practical component (Tp) is evaluated by three tests (T). The component grade is given by the weighted average of the mini-tests and form according to:

Tp = 0.35 T1 + 0.35 T2 + 0.3 T3;

- 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 "DIRECT CURRENT CIRCUIT ANALYSIS".

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.

Fórmula de cálculo da classificação final

Final grade (NF) under continuous assessment of the subject is given by:
NF = 0.7 Tp + 0.3 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 = 0.7 NE + 0.7 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.

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