Teacher
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CALABRO' Giuseppe
(syllabus)
Electromagnetic fields. Main vector operators. Basic definitions. Maxwell equations in integral form. Electrostatics. Laplace and Poisson equations. Capacitors. Lumped parameters electric circuits. Kirchhoff’s laws. Main circuit components: resistors, inductors, capacitors, independent voltage and current generators. Stationary regimes. Resistances in parallel and in series. Delta-wye transformation. Methods of analysis of electrical circuits. Kirchhoff equations method. Nodal analysis. Mesh analysis. Effect superposition principle. Tellegen, Norton and Thevenin theorems. Study of transients. RC, RL, RLC circuits. Definition of the initial conditions for the analysis of transients, I and II order. Solution of I and II order transient circuits. Sinusoidal regimes. Ohm symbolic law and concept of impedance. Kirchhoff symbolic laws. The symbolic method for the analysis of electric circuits in sinusoidal regimes. Power in sinusoidal regime. Three phase systems.. Power in a three phase system. Magnetostatics. Magnetic properties of matter, diamagnetic, paramagnetic and ferromagnetic materials, magnetic circuits, self and mutual induction coefficients. Hopkinson’s law. Electrical machines. Principles of electro-mechanical conversion of energy. Loss phenomena in electrical machines. The transformer. Working principle. Field hypotheses. Internal and external equations. Equivalent circuits. Transformers working in open circuit and short circuit. Measurement of the efficiency. Rotating magnetic field. Induction machines. Working principle. Internal and external equations. Equivalence theorem. Mechanic and electro-mechanic characteristics. Synchronous machines. Working principle. Internal and external equations. Power systems. Converters AC/DC and DC/AC, diode, BJT and thyristor.
(reference books)
Lecture Notes and presentations Giulio Fabricatore, Elettrotecnica e applicazioni, Liguori Editori, 1994 Luigi Verolino, Introduzione alle reti elettriche, EdiSES, 2013 Maurizio Repetto, Sonia Lea, Elettrotecnica. Elementi di Teoria ed Esercizi svolti, Città Studi Editore, 2014
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