Transients in electrical circuits

The concept of transients. Conditions for the occurrence of transients .

Electromagnetic processes that occur in an electrical circuit, when moving from one steady state to another, are called transient.
Transients are caused by changing circuit parameters, most often as a result of commutation in a circuit. Switching (switching) is the process of closing and opening switches.
Physically, the occurrence of transients is explained by the fact that a change in the energy of electromagnetic fields cannot occur instantaneously (abruptly) in such elements as a capacitor and an inductor, since These are inertial elements.
Transition time is much less than hundredths of a second.
Equations for solving transients.

i per = iust + isc
Upper = Uust + Uсв

iy and Uy are found for a steady process, i.e. when the transition is complete.

ICB and ICB - are located when there is no energy source in the circuit, i.e. i and U are determined only by the parameters of the circuit elements.

The equations are solved on the basis of two switching laws.