Nanjing Manufacturer of LED Backlight Sources, Contact Number, Supplier [Nanjing Weishibo Electronic Co., Ltd.]: There are many types of inductors, most of which are made by surrounding ferrite cores with enamel coated wire windings, while some protective inductors completely encase the windings within the ferrite. An inductor is an element that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to a transformer but has only one winding. It has a certain inductance, which only resists changes in current. If an inductor is without current flowing through it, when the circuit is closed, it will try to resist the current passing through; if an inductor has current flowing through it, when the circuit is opened, it will try to maintain the current constant. Inductors are also known as chokes, reactors, and dynamic reactors. Inductance is a property of a closed circuit, meaning when the current through a closed circuit changes, an electromotive force appears to resist the change in current. This type of inductance is called self-inductance, which is a property of the closed circuit itself. If the current in a closed circuit changes, due to induction, an electromotive force is generated in another closed circuit, and this type of inductance is called mutual inductance. Inductance is the alternating magnetic flux produced around a conductor when AC current passes through it, which is the ratio of the magnetic flux of the conductor to the current that produces it. When DC current passes through an inductor, only fixed magnetic field lines are present around it, which do not change over time.