Electromechanical Drives (Industrial Automation Branch)

Electronics and Computer Engineering

6 ECTS; 3º Ano, 1º Semestre, 28,0 T + 42,0 PL + 5,0 OT

- Carlos Alberto Farinha Ferreira

Not Applicable.

Understand the circuits and components used in power electronics; understand the operation of industrial converters; design solutions for command and control of electromechanical systems.

- Introduction: Historical overview of the evolution of electromechanical drives. Power electronics versus linear electronics. Framework and areas involved: power electronics, control, electrical machines, mechanical systems.
- Mechanical systems: Models of mechanical systems: Fundamental law of dynamics, viscous friction, turbulence friction, static friction, backlash, elasticity. Characterization of some types of loads and corresponding equations. Organs for transmitting and adapting movements, reducers, belts, chains, brakes, etc. Determination of mechanical parameters of a drive. Service requirements for electromechanical drives.
- Power electronics circuits and components: Triacs, transistors and diodes, inductors and capacitors, technologies, characteristics and operating principle. AC-DC, DC-AC, DC-DC and AC-AC converters, operating principle, topologies, design, command and control. EMI, "layout" and filtering.
- Drives for asynchronous machines: Review of the asynchronous machine. Methods of starting the machine. Command by varying the variables: voltage, voltage and frequency, field orientation, others. Circuits concerned. Practical use of systems.
- Drives for DC machines: Review of the DC machine. Drive controlled in position, speed and torque. Sensors and circuits concerned. Feedback loop. Practical use of systems.

Evaluation Methodology
Written test: 50%. Laboratory practice: 50%.

- Palma, J. (2008). Accionamentos Electromecânicos de Velocidade Variável. PORTUGAL: Fundação Calouste Gulbenkian
- Robbins, W. e Undeland, T. e Mohan, N. (2008). Power Electronics: Converters, Applications and Design. -: John Wiley & Sons
- Boldea, I. e Nasar, S. e , . (2016). Electric Drives. -: CRC Press
- Bose, B. e , . (1997). Power Electronics and Variable Frequency Drives. .: IEEE

Method of interaction
Scientific concepts are taught using the identified bibliography and classes with active participation of students. Subsequently, application exercises are solved and applications are carried out in the laboratory context.

Software used in class
Not Applicable.