Magnetic ring manufacturer, magnetic ring, clip-on magnetic ring, the lowest price in the country, Dongguan Zhijia Electronics

The electromagnetic waves radiated and leaked by electronic equipment not only seriously interfere with the normal operation of other electronic equipment, causing equipment dysfunction and transmission errors, but also threaten human health and safety, which is very harmful. Therefore, reducing the electromagnetic interference of electronic equipment has become an issue that must be considered. Absorption magnetic ring, also known as ferrite magnetic ring, referred to as magnetic ring. It is a commonly used anti-interference component in electronic circuits. It has a good suppression effect on high-frequency noise and is generally made of ferrite materials. The magnetic ring has different impedance characteristics at different frequencies. Generally, the impedance is very small at low frequencies. When the signal frequency increases, the impedance of the magnetic ring increases sharply. As we all know, the higher the signal frequency, the easier it is to radiate
To buy a high-quality computer case is also to reduce electromagnetic leakage. General signal lines have no shielding layer, so these
signal lines become A good antenna is used to receive various messy high-frequency signals in the surrounding environment, and these signals are superimposed on the originally transmitted signal and may even change the originally transmitted useful signal. Then, under the action of the magnetic ring, normal useful signals can be passed through very well, and high-frequency interference signals can be well suppressed from passing through, and the cost is low. So it’s not surprising that everyone sees plastic bump-shaped integrated magnetic rings in monitor signal lines, connecting cables, and even high-end keyboards and mice. Passing the entire cable through a ferrite magnetic ring forms a common mode choke. If necessary, the cable can also be wound around the magnetic ring for several turns. The greater the number of turns, the better the suppression effect on lower-frequency interference, but the weaker the suppression effect on higher-frequency noise. In actual engineering, 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 the interference signal is relatively wide, two magnetic rings can be placed on the cable, each with a different number of turns, so that high-frequency interference and low-frequency interference can be suppressed at the same time. From the perspective of the mechanism of the common mode choke coil, the greater its impedance, the more obvious the interference suppression effect. The impedance of the common mode choke coil comes from the common mode inductance. It is not difficult to see from the formula that for noise of a certain frequency, the larger the inductance of the magnetic ring, the better. But this is not actually the case, because there is also parasitic capacitance on the actual magnetic ring, which exists in parallel with the inductor. When high-frequency interference signals are encountered, the capacitive reactance of the capacitor is small, short-circuiting the inductance of the magnetic ring, thereby rendering the common mode choke ineffective.