Electrotechnics and Electrical Machinery
The students, through rigorous scientific deduction, should become aware of the mathematical and physical foundations of applied electrotechnics, namely, of the electric power’s production, distribution and use, and of the composition and characteristics of the most relevant industrial electrical machines.
On the other hand, students must become competent to model, analyse and calculate simple electric power circuits and networks, including balanced three-phase ones. Students will become able to make technically based choices of simple electrical equipments.
Pedro Miguel Ribeiro Pereira, Rui Miguel Amaral Lopes
Weekly - 5
Total - 76
Students should have basic knowledge of electromagnetism and mathematical analysis, including complex number analysis.
The distinct concepts, techniques and theories are explained by the lecturer with the support of slides and practical demonstrations with different equipments.
Students assess their skills through semiautonomous resolution of sets of problems, available in the slides.
Experimental work at lab.
Includes a theoretical component (Comp. TP) and a practical component (Comp. P), with weights of 75% and 25%, respectively, for the final classification. The classification in each component (TP and P) must be greater than 9,5.
Comp. P - Two experimental works (TA1 and TA2), whose classification must be greater than or equal to 9.5 and is mandatory for obtaining frequency.
Comp. TP - can be made by:
a) 2 Tests (T)
Classif. Comp. TP = (0,45*T1 + 0,55*T2) >= 9,5 val.
b) Final Exam (Ex) >= 9,5 val.
The final grade is obtained by:
NF = (0.75 * Comp.TP) + (0.125 * TA1 + 0.125 * TA2)
The classification obtained for experimenatl work is valid for 2 years.
ONLY numerical calculators will be allowed during tests and/or exams.
Electrical Quantities. Voltage-current equations of capacitors, inductors and resistors.
DC electrical networks. Kirchhoff’s laws.
AC circuit analysis. Sinusoidal functions. Complex representation. Phasors and complex Amplitudes.
Complex impedance. Active, reactive, apparent and complex powers. Complex Poyting’s Theorem. Ressonance. Power factor correction.
Three-phase systems. Fundamentals of power production and transportation.
Magnetostatics. Magnetic circuit
Magnetic linkage in mono and three-phase transformers. Transformer theory. Steinmetz equivalent circuit.
Programs where the course is taught: