Inductance coils are widely used. The so-called inductance coil means that when there is current in the wire, a magnetic field is built around it. Usually we wind the wire into a coil to enhance the magnetic field inside the coil. Inductance coils are made by winding wires (enameled wires, yarn-wrapped or bare wires) around an insulating tube (insulator, iron core or magnetic core) one circle by one circle (the conductors are insulated from each other) (generally, Inductance coil has only one winding) coil is called inductance coil.

Generally speaking, the wire that winds the inductance coil has a certain resistance. Usually this resistance is very small and can be ignored. But when the current flowing in some circuits is very large, this small resistance of the coil cannot be ignored, because a large current will consume power on the coil, causing the coil to heat up or even burn out, so sometimes it must be considered. The electric power that the coil can withstand. Inductance The inductance L represents the inherent characteristics of the coil itself, and has nothing to do with the magnitude of the current. Except for special inductance coils (color code inductance), the inductance is generally not specifically marked on the coil, but marked with a specific name.

The inductance coil presents a certain resistance to the flow of electrical signals in the circuit. This resistance is called'impedance'. The impedance presented by the inductance coil to the current signal uses the self-inductance of the coil. Inductance coil is sometimes referred to as "inductance" or "coil", which is represented by the letter "L". When winding an inductance coil, the number of turns of the coil is generally called the "number of turns" of the coil.

For inductance coils, different types of inductance coils. Their line type selection is different, which is also very important. This directly affects the quality and life of the inductor coil.