Teacher

prof. aggr. Ruben SPECOGNA

Credits

6 CFU

Language

Italian

Objectives

The course provides a preliminary understanding of electrical engineering and is directed to a specialist in non-electrical engineering, transmitting the necessary basic knowledge of electromagnetic field theory and electric circuits, with application to electrical systems and an electrical machines.

Acquired skills

- Capability of analising simple static and quasistatic electromagnetic field configurations.
- Capability of analising simple electrical networks with lumped parameters in DC and AC regimes.

Lectures and exercises (topics and specific content)

Charge, currents and electric forces: charge, charge density; current and current density, continuity equation; electric forces and field; electric work, voltage; conservative and non conservative fields; scalar potential (6 hours).
Dissipative effects: Ohm and Joule laws; electric resistance; constitutive law; kind of resistors (4 hours).
Electrical generators: electrostatic work; behaviour of generators with and without load, electro motive forces; voltage measurements; power balance; kind of generators (4 hours).
DC regime circuits: electric network and working regime; power and electric work; topology of networks; methods of solution and theorems in affine network (16 hours).
Dielectric phenomena: electric field vector, electrostatic potential; electric flux density, Gauss theorem; conductors; polarisation, electric constitutive law; capacitor, capacitance; electrostatic energy; capacitor bipole; charge and discharge of the capacitor (8 hours).
Magnetic phenomena:  Faraday-Neumann and Lenz laws; magnetic flux density, vector potential, electric field; Ampére’s law, magnetic field; magnetisation, constitutive law, hysteresis; self and mutual inductions; work of magnetisation, magnetic energy, hysteresis work; forces in the magnetic field; inductor bipole, charge and discharge of an inductor (8 hours).
AC regime: time and symbolic representation, phasors; behaviour of resistors, capacitors and inductors in AC regime; generators; impedance, reactance, admittance; Kirchhoff principles; power; measurement instrumentations in AC regime; theorems on networks in AC regime; frequency behaviour of bipoles, series and parallel resonance (12 hours).
Mutual inductor in AC regime: equivalent circuit of transformer with perfect coupling without losses (2 hours).
Exercises (16 hours).

References

- e.book of "Appunti dalle lezioni" (Lectures notes)
- P. Lorrain, D.P. Corson, F. Lorrain, "Electromagnetic Fields and Waves", Freeman and Company, New York
- M. Guarnieri, A. Stella: "Principi ed Applicazioni di Elettrotecnica", Vol. 1°, Ed. Libreria Progetto, Padova
- Chua, Desoer, Khu, “Circuiti Lineari e non Lineari”, Jackson libri

Type of exam

Written and oral

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