Medicine and Surgery HT

Steady-state circuits. From Maxwell's equations to Kirchhoff's laws. Characteristics and constitutive links of the fundamental components: ideal electromotive force generator, ideal current generator, ideal resistor; the four types of controlled generators. Generalized Ohm's law. Power converted by an electrical load, power delivered (converted) by a generator. Generator and user conventions. External characteristic of real active bipoles: real electromotive force and real current generator. Transformation of a real emf generator into a real current generator or vice versa. Load adaptation to a source for maximum power draw. Equivalent (or input) resistance of a passive network. Tellegen's theorem (conservation of powers). Superposition theorem of effects. Thévenin and Norton theorems. Analysis of a steady-state network using the nodal potential method. The mesh current method. Circuits in sinusoidal regime. The capacitor and its constitutive bond. The inductor and its constitutive bond. The symbolic method for the solution of the integro-differential equations of circuits in the sinusoidal regime: algebraic operations, integral, derivative of f. sinusoidal (with references to complex field algebra). Quantities in sinusoidal periodic regime, definitions. Kirchhoff's laws. Powers in sinusoidal periodic regime: instantaneous, active, reactive, apparent. Impedance and admittance operators. Complex power. Powers in ideal resistive, capacitive, inductive components. Resistive-capacitive and resistive inductive series bipoles. R-L-C series circuit and the resonance phenomenon. Circuits with mutually coupled edges. Mesh method. Nodal potential method. Double poles: constitutive bonds and reciprocity relationship (without demonstration). Cascade connection of double ports. Determination of the auxiliary constants of a double-port. No-load and short-circuit tests. Ideal transformer and equivalent circuit. Properties of the ideal transformer. Notes on the transition from the ideal transformer to the real one.

Knowledge of the basic physics notions of electromagnetic fields is required.

S. Celozzi, Note di Elettrotecnica, ed. Esculapio

Teaching is frontal, with presentation of theory and exercises on electrical networks.

Attendance is strongly recommended.

The exam is oral and focuses on the solution of a simple circuit in the sinusoidal periodic regime and on a theoretical question.

Teaching is frontal, with presentation of theory and exercises on electrical networks.