Special Electromechanical Drives
Code
10489
Academic unit
Faculdade de Ciências e Tecnologia
Department
Departamento de Engenharia Electrotécnica
Credits
6.0
Teacher in charge
João Miguel Murta Pina
Weekly hours
4
Teaching language
Português
Objectives
In the end of this course, students should be able to:
- Identify the main components of electromechanical drives, namely the power electronic converter, the electric machine, the command/control system and typical sensors.
- Apply fundamental concepts of electromagnetism and electromechanical energy conversion to the analysis of classic and special electric machines.
- Know distinct variables speed control techniques, with specific application to DC, synchronous and asynchronous motors.
- Understand and analyse transient regimes in electric machines, and its consequences in the operation of these devices.
- Understand and analyse special asynchronous machines, namely single-phase, linear three-phase, and polyphase with variable poles, and their equivalent models.
- Understand superconducting materials, namely high temperature, and its application in electric machines.
- Select motors and remaining drives components.
Prerequisites
- Fundamental notions of electromagnetism.
- Electromechanical energy conversion and theoretical electrotechnics.
- Control theory.
- Use of Matlab/Simulink tool.
- It is recommended previous attendance of Power Electronics in Drives course.
Subject matter
- Revision of basic concepts: electromagnetism, electromechanical energy conversion, static power converters, control techniques.
- DC motors drives: stationary and dynamic modelling, command, closed loop control, speed and torque control.
- Asynchronous motors drives: stationary and dynamic modelling in distinct reference frames, command by voltage variation with constant frequency and by constant V/f, field-oriented control, DTC control.
- Special electric machines: single-phase, linear three-phase, variable poles polyphase machines; high temperature superconducting materials and its application in electric motors (reluctance, hysteresis, synchronous, linear, homopolar); stepper motor.
Teaching method
The distinct concepts, techniques and theories are explained by the lecturer with the support of slides and demonstrators implemented in Matlab/Simulink. These are prepared for the classes by the lecturer, and the latter allow verifying or analysing distinct behaviours and operation regimes.
Students assess their skills through semiautonomous resolution of sets of problems, available in the slides.