Teacher

prof. Francesco TREVISAN

Credits

9 CFU

Language

Italian

Objectives

The course gives a basic knowledge of subjects in electric engineering. It is intended to the specialist in non electric sectors of engineering. The course provides  a basic knowledge of field and circuits theories.

Acquired skills

- Capability of analising simple static and quasistatic electromagnetic field configurations.
- Capability of analising simple electrical networks with lumped parameters.
- Principles of Electromachanical.

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 (4 hours).
Dissipative effects: Ohm and Joule laws; electric resistance; constitutive law; kind of resistors (4 hours).
Electric 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 (15 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 (12 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 (12 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 (10 hours).
Mutual inductor in AC regime: equivalent circuit of transformer with perfect coupling without losses (4 hours).
Transients in linear networks with bounded input: transients in linear networks of bipoles with bounded input and initial conditions at 0-, analysis in the time domain (4 hours).
II order  RLC series/parallel circuit in free evolution: analysis of II order RLC series/parallel circuit in free evolution, over/under dumping, critical dumping (4 hours).
Step response of RLC circuits: step response of RLC series/parallel circuit in the cases, over/under dumping, critical dumping; general II order circuits (3 hours).
Three-phase networks: three-phase systems and networks; three-phase generators and loads; three-phase power and measurements; power factor correction (8 hours).
Electromachanical principles: rotating electrical machines, electromechanical conversion of energy; 1D model, e.m.f., power balances (6 hours).
Exercises (30 hours).

References

- e.book di "Appunti dalle lezioni"
- 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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