R bar (wire diameter 0.2mm-1.8mm), I-shaped inductor

An inductor is a component that can convert electrical energy into magnetic energy and store it. The structure of inductor is similar to that of transformer, but it has only one winding. The inductor has a certain inductance, which only blocks the change of current. If the inductor is in the state of no current flowing, it will try to block the current flowing through it when the circuit is connected; If the inductor is in the state of current flow, it will try to maintain the current unchanged when the circuit is disconnected. Inductors are also called choke, reactor and dynamic reactor.