Common mode inductors are a common electronic component that is widely used in many electronic devices. This article will detail the characteristics of common mode inductors and how to choose the right material to help you better understand and apply this electronic component.
1. The use characteristics of common mode inductors.
1.The common-mode rejection ratio is high.
The use of common-mode inductors can suppress the propagation of common-mode interference signals, thereby improving the anti-interference performance of electronic devices. Its high common-mode rejection ratio makes it able to effectively suppress interference signals from power lines or ground wires to ensure the stable operation of electronic equipment.
2.Low temperature coefficient.
The low temperature coefficient of common mode inductors allows them to maintain stable performance over a wide range of temperature environments. This feature is important for electronic devices that need to operate in different temperature environments.
3.Low DC resistance.
Common mode inductors have low DC resistance, which means that relatively little heat is generated when passing through an electric current, which can effectively reduce the power consumption and heat generation of electronic devices.
4.Compact structure.
Common mode inductors are compact and small, and can be easily installed in a variety of electronic devices. Its miniaturized design means it does not take up too much space, which facilitates the compact design of electronic devices.
Second, the selection of common mode inductance.
1.Selection of core material.
The choice of core material for common mode inductors needs to consider the environment and performance requirements of the common mode inductor. Common core materials include ferrite, manganese-zinc ferrite, nickel-zinc ferrite, etc. Among them, ferrite has high permeability and low loss, which is suitable for the suppression of high-frequency signalsManganese-zinc ferrite and nickel-zinc ferrite have slightly lower permeability, but have higher impedance and lower temperature rise coefficient, which are suitable for the suppression of low-frequency signals.
2.Selection of coil material.
The coil material selection for common mode inductors needs to consider parameters such as resistivity and temperature coefficient. The high-precision winding machine can guarantee the number of turns and shape accuracy of the coil, so as to obtain better electrical performance. At the same time, the selection of appropriate insulation and wire materials can also improve the electrical performance and reliability of common mode inductors.
3.The choice of the overall structure.
The overall structure selection of common mode inductors needs to consider their use environment and performance requirements. Common overall structures include vertical, horizontal, rail, etc. The vertical construction is suitable for applications where height space is limited;The horizontal structure is suitable for occasions with a large installation areaThe rail-mounted construction is suitable for applications that require quick installation and disassembly.
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