Green Ferrite Ring 9*5*3 New Power Coil Inductance Anti-jamming Core | Air Conditioner Parts

Green Ferrite Ring 9*5*3 New Power Coil Inductance Anti-jamming Core | Air Conditioner Parts

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Product Name:Ferrite magnet ring

Outer diameter (OD):9mmInside diameter (ID):5mmHigh (HT):3mm

Color:green

Magnetic rings, also known as ferrite magnetic rings, are commonly used anti-interference components in electronic circuits. They have a good suppression effect on high-frequency noise. Generally, ferrite materials are used.Mn-ZnMade of.

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

As we all know, the higher the signal frequency, the easier it is to radiate (to buy high-quality computer chassis is also to reduce electromagnetic leakage), and the general signal lines are not shielded, then these signal lines become very good.A good antenna receives all kinds of cluttered high-frequency signals in the surrounding environment, and these signals are superimposed on the original transmitted signals, and even change the original transmitted useful signals. Then under the action of magnetic ring, the normal useful signal can pass well, and the high frequency interference signal can be well suppressed, and the cost is low.

So everybody's on the monitor signal line.USBIt's not surprising that connectors, even plastic lumpy magnetic rings on high-end keyboards and mice.

Turn Number Selection of Magnetic Ring

A common mode choke coil is formed by passing the whole cable through a ferrite magnetic ring. The cable can also be wound several turns on the magnetic ring according to the need. The higher the number of turns, the better the interference suppression effect on the lower frequency, but the weaker the noise suppression on the higher frequency. In practical engineering, the turn number of magnetic ring should be adjusted according to the frequency characteristics of interference current. Usually when the frequency band of the interference signal is wide, two magnetic rings can be set on the cable, each of which has different turns, so that both high frequency interference and low frequency interference can be suppressed. From the mechanism of common mode choke, the greater the impedance is, the more obvious the interference suppression effect is. The impedance of common-mode choke comes from common-mode inductanceLcm=jwLcmFrom the formula, it is easy to see that for a certain frequency of noise, the larger the inductance of the magnetic ring, the better. But this is not the case in practice, because there is parasitic capacitance on the actual magnetic ring, which exists in parallel with inductance. When encountering high frequency interference signal, the capacitance reactance of the capacitor is small, and the inductance of the magnetic ring is short-circuited, thus the common-mode choke loses its function.

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