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Electrotechnics II

Code:

REID07

Sigla:

ELEII

Áreas Científicas
Classificação	Área Científica
CNAEF	Electricity and energy

Ocorrência: 2023/2024 - 2S

Ativa?	Yes
Unidade Responsável:	Departamento de Engenharia Eletrotécnica
Curso/CE Responsável:	Professional Technical Higher Education Courses in Smart Grids and Home Automation

Ciclos de Estudo/Cursos

Sigla	Nº de Estudantes	Plano de Estudos	Anos Curriculares	Créditos UCN	Créditos ECTS	Horas de Contacto	Horas Totais
REID	26	Plano de Estudos 2018/19	1	-	6	60	162

Docência - Responsabilidades

Docente	Responsabilidade
Svetlana Roudolfovna Chemetova

Docência - Horas

Theorethical and Practical :

4,00

Type	Docente	Turmas	Horas
Theorethical and Practical	Totais	1	4,00
Theorethical and Practical	Svetlana Roudolfovna Chemetova		4,00

Língua de trabalho

Portuguese

Objetivos

This course aims to provide basic training in the area of analysis of alternating current electrical circuits. It also provides students with sufficient skills to formulate methodologies for analyzing alternating current circuits, solve operating equations in the time and frequency domains, determine the corresponding electric voltages and currents, and analyze three-phase systems. The theoretical-practical teaching is complemented by laboratory work.

Resultados de aprendizagem e competências

To know the fundamental laws that govern the magnetic field and analyze a magnetic circuit.
Understand the importance of sinusoidal alternating systems compared to continuous systems.
Represent sinusoidal alternating quantities in complex notation, necessary for circuit analysis.

Analyze RL and RC series circuits.

Analyze series RLC and parallel RLC circuits and interpret the phenomenon of resonance.

Operate with the concepts of complex, apparent, active and reactive power. Calculate the powers involved in each circuit element.

Understand the concept of power factor correction and learn how to apply it to improve the characteristics of a load’s terminals.

Formulate and solve sinusoidal steady-state circuits using different methodologies and theorems.

Analyze three-phase circuits connected in star or delta (balanced and unbalanced load) and calculate their power.

Modo de trabalho

Presencial

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

System of Units. Electric Charge. Coulomb's Law. Electric Field. Potential. Work and Potential Energy. Capacitance and Capacitors. Association of Capacitors. Energy in a Capacitor. Dielectric Materials.

Electric Quantities. Electric Resistance. Ohm's Law. Joule Effect. Power and Energy. Active and Passive Elements. Conservation of Energy. Association of Resistances. Star-Delta and Delta-Star Conversions. Kirchhoff's Laws. Voltage and Current Dividers. Superposition Theorem. Nodal and Mesh Analysis. Thevenin's and Norton's Theorems. Power Balance.

Programa

CHAPTER I - Alternating current

Alternating current generator. Voltage and current with sinusoidal variation over time. Analysis of circuits in the frequency domain. Impedance and admittance. Instantaneous, apparent, active and reactive power. Phasor relationships. RC, RL and RLC series and parallel circuits. Resonance. Energy analysis. Power factor.

CHAPTER II - Analysis of alternating current circuits

Resolution of AC circuits with the application of different methodologies. Nodal and mesh analysis. Superposition theorem. Thevenin and Norton theorems. Font conversion.

CHAPTER III - Three-Phase Systems

Balanced three-phase generators. Simple and compound tension. Star and triangle connections. Power in three-phase systems. Balanced and unbalanced loads.

Bibliografia Obrigatória

Sadiku Musa Alexander; Análise de Circuitos Eléctricos com Aplicações
Prof.ª Svetlana Chemetova; Fundamentos de Corrente Alternada Sinusoidal

Bibliografia Complementar

Robert L. Boylestad; Introdução à Análise de Circuitos

Métodos de ensino e atividades de aprendizagem

Theoretical/practical classes: Presentation of theoretical subjects using a combination of expository and interpretive methods, encouraging student participation. Problem-solving exercises are used to promote active participation by the students.

Laboratory classes: A participatory method is followed, although other active methods are used depending on the situation. Six laboratory assignments are completed with the support of specific guides, and the students present reports on the work they have completed.

Software

Software de simulação Easy EDA

Tipo de avaliação

Distributed evaluation without final exam

Componentes de Avaliação

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

Componentes de Ocupação

Designation	Tempo (Horas)
Estudo autónomo	78,00
Frequência das aulas	60,00
Trabalho laboratorial	24,00
Total:	162,00

Obtenção de frequência

Theoretical-practical component: continuous assessment with 3 tests (T1, T2 and T3).

Laboratory component: continuous evaluation of laboratory work (L) developed and discussed. Tests and laboratory work are mandatory for the assessment process in the curricular unit.

Fórmula de cálculo da classificação final

Final grade (NF) in the discipline's continuous assessment regime is given by:
NF = 0.7 Tp + 0.3 L
where Tp is the grade of the Theoretical-practical component obtained by the weighted average of three tests as follows:
Tp = 0.35 T1 + 0.35 T2 + 0.3 T3
L is the grade obtained in the Laboratory component.

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 Laboratory component (L) as:
NF = 0.7 NE + 0.3 L

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

Melhoria de classificação

Taking exams for improvement purposes is subject to registration at the "Divisão Académica" in accordance with current regulations.

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