Introduction to electric circuits
Basic circuit elements. Passive and active sign convention. Ideal current and e.m.f. sources. I-V characteristics of basic circuit elements. Real sources and their I-V characteristics.
Direct current networks
Kirchhoff’s circuit laws. Equivalent resistance. Superposition principle. Network theorems (Thevenin, maximum power transfer, etc.). Mesh current method. Node voltage method.
Alternating current networks
Phasors. I-V characteristics of basic circuit elements in AC. Series and parallel resonance. AC powers. Network analysis theorems in AC. Node voltage method. Power factor correction. Network analysis in the presence of mutual inductances.
Three-phase systems
Balanced three phase systems. Equivalent one-phase circuit. Unbalanced three phase systems. Power in three phase systems. Power factor correction of a three phase load.
Transformers
Ideal transformer and equivalent circuit. Physical structure. Equivalent circuit of the real transformer. Introduction to the three-phase transformer.
The induction motor
Electromechanical energy conversion. The rotating magnetic field. The induction motor. Operating principle. Physical structure of the induction motor. Equivalent one-phase circuit. Power and torque. Mechanical characteristic and torque speed-curve. Motor starting issues.
The synchronous generator
Operating principles. Physical structure. Equivalent one-phase circuit. Armature reaction. No load and on-load operation. Power and torque. Applications
Introduction to Electrical power systems
General considerations over the production, transmission and distribution of electrical energy. Voltage drops. Overvoltages and overcurrents. Distribution networks. Ground connections. IT, TT, TN systems.
Electrical safety issues