An inductors
is a component that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance, and it only impedes changes in current. If the inductors is in a state without current passing through, when the circuit is connected, it will try to prevent the current from flowing through it; if the inductor is in a state with current passing through, when the circuit is disconnected, it will try to maintain the current unchanged. Inductors are also known as choke coils, reactors, and dynamic reactors.