Base Knowledge
Mathematics and physics.
Teaching Methodologies
Theoretical classes: mostly expository classes, with the aid of “Powerpoint” presentations. Using the board to solve some examples/exercises and to do some demonstrations.
Theoretical-practical classes: Carrying out exercises/problems individually or in small groups.
Learning Results
Goals:
– The aim of the curricular unit “Electrical Circuits Theory I” is to provide students with the most basic principles and notions of circuit analysis concepts, regarding direct current circuits and single-phase alternating current circuits.
Skills:
– Understand the meaning of good practices for solving electrical circuits in circuit analysis.
– Understand the theory and operation of direct current circuits.
– Understand the theory and operation of single-phase alternating current circuits.
Program
– Electrical Circuits and Engineering.
– Direct current.
– Units of the International system.
– Notion of: electrical charge, electrical circuit, passive elements and active elements.
– Ideal sources: independent and dependent.
– Electrical voltage and electrical current.
– Electric power and energy.
– Conventional direction for the electrical current.
– Electrical resistance.
– Ohm’s Law.
– Internal resistance of a source.
– Association of resistors: resistors in series and resistors in parallel.
– Kirchhoff’s Laws: mesh law and knot law.
– Voltage dividers.
– Current dividers.
– Charge effect.
– Independent mesh method.
– Overlap theorem.
– Super-mesh method.
– Nodal analysis method.
– Font Transformation.
– Thevenin’s theorem.
– Norton’s Theorem.
– Maximum Power Transfer Theorem.
– Star-Triangle Transformation.
– Reviews on the use of complex numbers.
– Inductances (coils): current voltage characteristic.
– Association of inductances.
– Capacitances (capacitors): current voltage characteristic.
– Association of capacitances.
– Sine waves: period, angular velocity, frequency and phase shift.
– Effective value of a sine wave.
– Steinmetz transform.
– Resistive circuits.
– Circuits with inductances.
– Circuits with capacitances.
– Impedance of a circuit.
– Circuits with resistances and inductances (RL).
– Circuits with resistances and capacitances (RC).
– RLC series circuit.
– Active power, reactive power and apparent power.
– Power triangle.
– Power factor compensation.
Curricular Unit Teachers
Internship(s)
NAO
Bibliography
Nilsson, James W. & Riedel, Susan A. (2008). “Electric circuits”. 8th Edition, Upper Saddle River, NJ, Pearson Education International. (1-3-254 (ISEC) – 14413)
Edminister, J. A. (1991). “Circuitos elétricos: resumo da teoria; 350 problemas resolvidos; 493 problemas propostos”. (Colecção Schaum), São Paulo, Makron Books. (1-3-245 (ISEC) – 10813) – In Portuguese
Bessonov, L. (1977). “Electricidade Aplicada para Engenheiros”. 2nd Edition, Lisboa, Lopes da Silva. (1-3-211 (ISEC) – 08935) – In Portuguese
Available Support Material (at “Inforestudante”):
1) Presentations made in theoretical classes;
2) Problem sheets.