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Machinery and Industrial Electronics

Code:

ARCI12

Sigla:

MEI

Áreas Científicas
Classificação	Área Científica
CNAEF	Electronics and automation

Ocorrência: 2021/2022 - 2S

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	20	Plano de Estudos_2015_16	1	-	6	60	162
TSPARC	24	Plano de Estudos_2015_16	1	-	6	60	162

Língua de trabalho

Portuguese

Objetivos

The aim of this course unit is that students are able to understand the basic principles of operation of the main electrical machines used in electromechanical drives in an industrial environment, as well as the electronic power converters used to control electrical machines.

Resultados de aprendizagem e competências

This Curricular Unit aims for students to be able to:
1- understand the working principle of direct current (MCC) and alternating current (MI) electric machines,
2- understand their electromechanical and mechanical characteristics,
3- calculate the currents, losses and efficiency of the MCC and MI.
4- understand the working principle of AC/DC, DC/DC and AC/DC converters 5- calculate the powers involved in the converters,
6- understand the applications of converters..

Modo de trabalho

Presencial

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

Know how to apply complex numbers and basic concepts in the field of electrotechnics and electromagnetism.

Programa

1 - Electric Machines direct current machine
- Constitution and working principle of a direct current machine.
- Types of excitation, equivalent scheme, energy diagram and efficiency, characteristics in steady state.
- Starts and speed variation.

Three-phase asynchronous machine
- Constitution and working principle of a three-phase asynchronous machine. Notion of rotating field.
- Equivalent schemes. Powers, torques, energy diagram, performance. - Electromechanical and mechanical characteristics.
- Starts and speed variation.

2 - Power Electronics Introduction: main power semiconductor elements.

AC/DC converters or rectifiers
- Operating principles.
- Commanded and non-commanded rectifiers.
- Active, Reactive, Apparent and Deforming Powers. Power Factor. Applications.

DC/DC converters or chopper's
- Operation principle. Topologies of: one-quadrant, two-quadrant, and four-quadrant.
- Application to the control of direct current machines.
- Switched power supplies. DC/AC converters or inverters
- Operating principle of voltage inverters.
- Application of voltage inverters in the control of alternating current machines.
- Modeling techniques

Bibliografia Obrigatória

José Vagos Carreira Matias; Máquinas Elétricas, Plátano Editora, 2015. ISBN: 9789897600838
José Vagos Carreira Matias; Máquinas Elétricas - Corrente alternada, Platano Editora, 1997. ISBN: 9789726501244
Jesus Fraile Mora; Máquinas Eléctricas, McGraw-Hill, 2003. ISBN: 84-481-3913-5
João C. P. Palma; Fundamentos de Electrónica de Potência,, AEISEL
Ned Mohan, Tore Undeland, William Robbins; Power Electronics: Converters, Applications and Design;, John Wiley & Sons.

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 in the light 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 in order to implement the theoretical concepts studied.

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	70,00
Frequência das aulas	60,00
Trabalho laboratorial	32,00
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 of 75% and are required to carry out all assessments of the two components:
- Theoretical component (Tp) is evaluated by 4 mini-tests; MT1 - MCC, MT2 - MI, MT3 - (AC/DC + DC/DC) and MT4 - (DC/AC). The grade of this component is given by the weighted average of the evaluations obtained in the mini-tests according to:
Tp = 0.65 (0.3 MT1+0.32 MT2+0.23 MT3+0.15 MT4);

- Laboratory component (L) with mandatory completion of 3 laboratory assignments NL1 - MCC, NL2 - MI and NL3 - Converters and are evaluated according to performance, report and small group oral discussion. Eventually, the discussion of the works can be on the teams platform or face-to-face and relate to the topics of the UC laboratories. The grade of this component is given by the weighted average of the evaluations obtained in the laboratory work according to:
L = 0.35 (0.3 NL1+0.4 NL2+ 0.3 NL3);

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. Laboratory work should be developed throughout the semester. Examination tests are carried out at scheduled times at School level.

For any evaluation moment (mini tests or face-to-face exam), the 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 assessment 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

1- The continuous assessment regime
The final grade of the course (NF) will be calculated as follows:
NF=0.65*(0.3*MT1+ 0.32*MT2+ 0.23*MT3+ 0.15*MT4)+0.35*(0.3*NL1+0.4*NL2+0.3*NL3).

2- Assessment regime by exams with mandatory laboratory work Assessment by exam, the final exam grade (NE) must be equal to or greater than 10, with a weight of 65% depending on:
NF=0.65*NE+0.35*NL and NL = 0.3*TL1+0.4*TL2+0.3*TL3


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

In any of the evaluation methods mentioned above, whenever the final classification is greater than or equal to 17 values, the student must take an oral test, obtaining as a final grade the average of the previous final classification with the aforementioned oral test. If the student does not attend the oral test, the final classification will be 16 values.

Observações

Working students, high-level athletes, association directors and students under the Religious Freedom Law must address, until the second academic week of the semester, the head of the UC to present their relevant specifics, under the terms provided for in the respective diplomas under penalty that they cannot be performed for lack of objective conditions.