A magnetic ring appearance under normal lighting conditions may be checked by the visual method. External dimensions of the second magnetic ring with an accuracy of 0.02mm vernier caliper under normal lighting conditions tested. Comprehensive factor 3 ring with "CF-3A-type magnetic sorter" measured excitation current is set to 2.5A, the frequency of 40KHz. 4 laps four magnetic inductance is measured at 1 KHz frequency with "YD2810D type LCR digital bridge." 5 magnetic induced electromotive force with "UI100-frequency power source" and "UI9720 magnetic Dynamic Analysis System" under specified conditions, were measured. 6 [1] magnetic Curie point of use "YD2810D type LCR Digital Bridge" and the measurement precision oven. Choose turns the whole bundle cable through a ferrite bead constitutes a common mode choke liaobu ring connectors, as needed, can also be in the ring on top of the cable around a few turns. The more turns, the lower frequency interference suppression effect, the better, but at higher frequencies the noise weak inhibition. In practical engineering stream magnetic connector, according to the frequency characteristics of the interference current ring to adjust the number of turns. Often when the band is wide magnetic interference signal connector can be set on both cable ring, each magnetic surround different turns, which can interfere with high frequency and low frequency while suppressing interference. From the mechanism of action of the common mode choke point of view, the greater the impedance, the more obvious effects of interference suppression. The common mode choke coil impedance from the common mode inductance Lcm = jwLcm, from the formula is not difficult to see that, for a certain frequency noise, magnetic inductance bigger the better. But the reality is not so dongkeng magnetic connectors, magnetic as well as on the actual parasitic capacitance, and its existence is parallel with the inductor. When faced with the high frequency noise, capacitive reactance is small, the magnetic inductance short circuit, so that the common mode choke useless. Dalingshan magnetic connectors, magnetic connectors, electronic products factory Song Chong-wook from Dongguan Shijie Xu Song Chong electronic products factory provided. Dongguan Shijie Xu Song Chong Electronic Products Factory (chuangxs.1688.com) (www.chuangxs.1688.com) strong, credible, connectors, and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead Xu Song electronic products factory and you hand in hand into the brilliant, for a better future!