Ferrite Magnetic Ring 6*3*3mm Anti-interference Inductance Common Mode Filter Small Beads Spray Green | Обустройство дома

Ferrite Magnetic Ring 6*3*3mm Anti-interference Inductance Common Mode Filter Small Beads Spray Green | Обустройство дома

Name：Ferrite ring

external diameter：6.0mm internal diameter：3.0mm height：3.0mm

colour：green（Spraying insulating paint）

Company：individual

Sales volume：50individual

Commodity type：Non magnet、Non ferromagnetic

Magnetic ring is also called ferrite magnetic ring，It is a common anti-interference component in electronic circuits，It has a good restraining effect on high frequency noise，Ferrite materials are generally used（Mn－Zn）Make。

Magnetic rings have different impedance characteristics at different frequencies，Generally, the impedance is very small at low frequency，When the signal frequency increases, the impedance of the magnetic ring increases sharply。

　　As you all know，Higher signal frequency，The easier it is to radiate（To buy high-quality computer case is also to reduce electromagnetic leakage），But the general signal line has no shielding layer，So these signal lines become veryGood antenna，Receive all kinds of high frequency signals in the surrounding environment，And these signals are superimposed on the original transmission signals，It will even change the original transmission of useful signals。So under the action of magnetic ring，Make normal and useful signals pass well，It can also restrain the passing of high-frequency interference signals，And it's cheap。

　　So we're on the display signal line，USBConnecting line，Even high-end keyboard、It's no surprise that the mouse looks like a plastic one-piece magnetic ring。

　　Selection of turns of magnetic ring

　　A common mode choke is formed by passing the whole cable through a ferrite magnetic ring，According to need，The cable can also be wound on the magnetic ring for several turns。The more turns there are.，The lower the frequency, the better the interference suppression effect，However, the noise with higher frequency is less restrained。In the actual project，The number of turns of the magnetic ring should be adjusted according to the frequency characteristics of the interference current。Usually when the frequency band of interference signal is wide，Two magnetic rings can be sleeved on the cable，Different turns of each magnetic ring，This can suppress both high-frequency interference and low-frequency interference。From the mechanism of common mode choke，The greater the impedance，The more obvious the interference suppression effect is。The impedance of the common mode choke comes from the common mode inductanceLcm=jwLcm，It's not hard to see from the formula，For a certain frequency of noise，The larger the inductance of the magnetic ring, the better。But this is not the case，Because there is parasitic capacitance on the actual magnetic ring，It exists in parallel with the inductance。When encountering high frequency interference signal，Capacitance reactance is small，Short circuit the inductance of the magnetic ring，Thus, the common mode choke will lose its function。

Reminder

One、Rings are sold by size，Companymm(millimeter），tolerance+、-0.3mm

Two、Dimensions according to product description on page，Don't just imagine buying，If you don't know, please consult customer service。

Three、The magnetic ring is fragile，Be careful when using，If you have any questions, please contact us。

One、Please read the instructions carefully before purchasing，This type of product is a new spray green ferrite。Due to different batches of products，The appearance of the product may vary from light color to dark color，It will not affect the normal use of product performance，Please feel free to buy。

Two、Because products are sold at the same time with physical stores，So the flow of goods is fast。In case of temporary shortage，We will call you in time。When necessary，Please contact customer service before filming，Please understand the inconvenience！