General Electrical Engineering
The students should acquire mathematical and physical foundations of applied electrotechnics, namely, of the electric power’s production, distribution and use, and should also obtain solid knowledge concerning composition and characteristics of the most relevant electrical machines used in energy systems.
Pedro Miguel Ribeiro Pereira
Weekly - 4
Total - 59
Knowledge adequate to the level of study, namely:
- Fundamentals of electromagnetism
- Complex numbers
- Differential and integral calculus
- Vítor Meireles, Circuitos Eléctricos 6ª Edição, LIDEL, 2010.
- John Bird, Electrical Circuit Theory and Technology 2nd Ed, Newnes, 2003.
- Documentation provided by the lecturer.
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 support materials.The team work is encouraged. The oral communication is stimulated.
The evaluation method could be one of the following:
a) 2 Tests (MT) + Laboratoty Work (TL)
Classification of (MT) = (0,40*MT1+0,60*MT2) >= 9,5 val. and TL >= 9,5 val.
Final Classification = 0,80*C(MT) + 0,20*TL >= 9,5 val.
b) Final Exam (Ex) + Laboratoty Work (TL)
Final Classification = 0,80*(Ex. Classification >= 9,5 val.) + 0,20*TL >=9,5 val.
TL, whose classification must be greater than or equal to 9.5 and is mandatory for obtaining frequency. The classification obtained for experimenatl work is valid for 2 years.
ONLY numerical calculators will be allowed during tests and/or exams.
I. Direct current circuits analysis
1. Eletric resistence, power and energy (a review)
2. Kirchoff laws
II. Alternate current circuit analysis
1. Inductors and capacitors
2. Average value and RMS value of a time variable signal
3. Complex amplitude and fasors
4. RL, RC and RLC circuits
6. Power factor correction in an industrial power plant
III. Triphasic circuits analysis
1. Principle of operation
2. General equations
3. Equivalent eletrical circuit for ideal and real transformer
V. Assynchronous machine (or, induction machine)
1. Constitution and operation principles as motor and generator
2. Induction motor: mechanical speed, torque, power and efficiency
3. Equivalent electrical circuit of the motor
4. Speed control processes