As an important component in electronic circuits, the selection and application of inductor parameters directly affect the performance of the entire circuit. However, for many beginners, the parameters of inductance can be a confusing concept. This article will take you to understand the parameters of inductors, help you better understand the working principle of inductors, and provide strong support for circuit design.
1. Definition and function of inductance.
An inductor is an energy storage component that works on the principle of electromagnetic induction. When an electric current is passed through an inductor, a magnetic field is generated, and the change in the magnetic field in turn creates an induced electromotive force, which hinders the change in the current. The role of inductors in circuits includes filtering, oscillation, delay, etc., and is widely used in various electronic devices.
Second, the main parameters of inductance.
Inductance value (L): The inductance value is an important parameter to describe the performance of the inductor, indicating the self-inductance of the inductance coil. The unit is henry (h), and the commonly used units are millihenge (MH) and microhenge (uh).
Figure of merit (q): The figure of merit is an important parameter to measure the performance of an inductor, which indicates the ratio of the inductor's loss to energy storage. A good figure of merit indicates lower losses, which is beneficial for improving the performance of the circuit.
Rated current (i): Rated current refers to the maximum current value that the inductor can work stably for a long time at a specified operating temperature. Choosing the right current rating is critical to ensuring the safety of the inductor and the entire circuit.
Distributed capacitance: Distributed capacitance refers to the equivalent capacitance of an inductor when operating at high frequencies. Distributed capacitance affects the operating frequency and performance of a circuit, especially in high-frequency circuits.
Temperature Coefficient: The temperature coefficient indicates the degree to which the inductance value changes with temperature. Understanding the temperature coefficient helps to improve the performance of inductors at different temperatures, which helps in the stability design of circuits.
3. How to choose the right inductor according to the needs.
In practical applications, it is very important to choose the right inductor according to different needs. For example, in a power supply filtering circuit, we need to select an inductor with an appropriate inductance value and figure of merit to achieve good filteringIn the oscillation circuit, we need to pay attention to the frequency characteristics of the inductor to ensure the normal operation of the circuit. Therefore, when selecting an inductor, it is necessary to consider it comprehensively according to the specific circuit requirements and parameter requirements.
IV. Conclusion. In this paper, the parameters of the inductor are introduced in detail, including inductance value, figure of merit, rated current, distributed capacitance and temperature coefficient. It is hoped that through the introduction of this article, readers can better understand the working principle and application points of inductors. In practical applications, we should select the appropriate inductance parameters according to specific needs to provide strong support for circuit design. At the same time, pay attention to the development trends of inductor technology at home and abroad, and understand the performance characteristics and application fields of new inductors, which will help improve our electronic design level.