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Fixed inductors refer to inductors whose inductance values remain the same in a certain range of a certain frequency of alternating current, also known as inductors. In the modern electronic products industry, their application field and working principle are closely related to the basic characteristics of inductors.

First of all, the application field of fixed inductors include power supply equipment, computer electronic products, communication and wireless products, various motor control, automatic control systems, switching power supply and instrumentation, etc. In these fields, fixed inductors are indispensable, such as for the filters of power supply and other electric fields. It can be used to filter out the high frequency interference signals, so that the related devices can obtain better working environment, its scope of application is very wide.

Next, we talk about the working principle of fixed inductors. Basically, the inductance is the property that the electric current passing through the coil generates the magnetic field, and the magnetic field coupled with the coil generates the self-induced electromotive force. The inductive effect of the inductor is because when the alternating current flows through the coil, it induces a self-induced electromotive force in the coil, so the alternating current is blocked and the voltage changes can only occur on the coil. A fixed inductor is a coil whose inductance remains constant in a given frequency range. Therefore, it can be used to block or pass high-frequency signals in electronic products.

On the part of the physical structure of the fixed inductor, there are double-layer coils, multi-layer coils, magnetically coupled coils, air cores, magnetic cores, and ferrite cores. Generally speaking, air core coils will become unreliable in high frequency. In a magnetically coupled circuit, two or more coils are connected at both ends by a magnetic attraction, and current can be passed through one coil to the other, forming a transformer like mechanism.

In summary, fixed inductors are widely used in many aspects of modern electronic equipment. The application field is mainly power supply equipment, computer electronic products, communication and wireless products, various motor control, automatic control systems, switching power supply and instrumentation, etc.The working principle is that when an alternating current passes through the inductor, a self-induced electromotive force is induced in the inductor, so that the alternating current can be stopped and the high-frequency signal can be blocked so that the related devices can obtain an improved working environment. The physical structure is mainly double-layer coils, multi-layer coils, magnetically coupled coils, air cores, magnetic cores, and ferrite cores.

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