Publication in the Diário da República: Despacho n.º 7795/2021 - 09/08/2021
6 ECTS; 3º Ano, 2º Semestre, 28,0 T + 42,0 PL , Cód. 911258.
Lecturer
- Carlos Alberto Farinha Ferreira (1)(2)
(1) Docente Responsável
(2) Docente que lecciona
Prerequisites
Not applicable.
Objectives
The aim is for the student to understand the operation of an electromechanical actuation system based on the behavior of its constituent elements: the mechanical load; the electrical machine; the electronic power converter; the controller and the power supply, and the interaction between them, based on the functional requirements of the specific application.
In this way, the aim is to provide skills for choosing, and even designing/implementing, drives for industrial systems, electric traction vehicles and others, according to their requirements, specificities and technologies involved.
Program
1. Constitution of an electromechanical system;
1.1 Introduction to electromechanical systems;
1.2 The electric vehicle - constitution and specific characteristics of electric vehicles;
2. Modelling the stationary and dynamic behaviour of mechanical components;
2.1 Mechanical elements;
2.2 Equations of motion;
2.3 Typical loads;
2.3.1 Rigid and elastic linkage;
2.3.2 Gearbox;
2.3.3 Pumps and fans;
2.3.4 Reels;
3 Specific characteristics of electric vehicles;
3.1 Equations of motion;
3.2 External forces;
3.2.1 Wheel model;
3.2.2 Resistant forces;
4. Applications of control systems in electromechanical drives;
4.1 Direct current machines;
4.2 Three-phase asynchronous machines;
4.3 Synchronous machines;
5. Power supply for electric traction systems;
5.1 Batteries;
5.1.1 Analysing the different types of batteries;
5.1.2 Battery parameters and technical characteristics;
5.1.3 Battery modelling;
5.2 Alternative systems;
5.2.1 Fuel cells;
5.2.2 Supercapacitors;
5.2.3 Flywheels;
6. Power chain in electric vehicles (EVs) and hybrid electric vehicles (HEVs);
6.1 Transmission components;
6.2 Power chain dimensioning;
6.3 Regenerative braking;
6.4 Analysing the consumption and range of EVs and HEVs;
Evaluation Methodology
The assessment consists of two parts, namely a written test (i) and practical work to be carried out during the semester (ii). Both parts (i and ii) are worth 50 per cent of the final grade. Approval in the course requires a mark of 10 or more in the written test (i). There are no minimum grades for the laboratory component. Laboratory grades are valid at any time of assessment.
Bibliography
- Dente, A. e Palma, J. (2008). Accionamentos Electromecânicos de Velocidade variável. (Vol. 1). Portugal: Fundação Calouste Gulbenkian
- Gillespie, T. (2021). Fundamentals of Vehicle Dynamics, Revised Edition. EUA: SAE International
Teaching Method
Theoretical lectures, both expository and inquisitive, theoretical-practical classes where practical cases are solved, and finally, practical-laboratory classes where the connection between concepts and measurable and sensory reality is made.
Software used in class
Matlab and Microsoft Excel.
