High-pressure isolation annular core-through capacitor

Abstract

The invention discloses a high-pressure isolation annular core-through capacitor which comprises a step-type shield cover, an annular insulator, a core-through electrode and an annular dielectric medium filler, wherein the step-type shield cover is made of conducting materials and is used as an electrode of the annular core-through capacitor; the annular insulator is made of insulation epoxy resin and quartz powder; the core-through electrode is in the shape of hollow convex column and is used as the other electrode of the annular core-through capacitor; and the annular dielectric medium filler is made of high pressure resistant dielectric medium materials. The annular dielectric medium is sleeved on the core-through electrode and is arranged in the step-type shield cover; and the annular insulator is arranged between the core-through electrode and the step-type shield cover. The invention effectively enhances high pressure resistant strength, prevents passing of a radial electromagnetic field in the medium of the annular core-through capacitor so as to shield the entire annular core-through capacitor, greatly enhances electromagnetic interference inhibiting ability, has integrated and good inhibiting effect to high-frequency electromagnetic interference of signals or transmission wires, and has the advantages of large capacity and strong transmission signal.

Description

technical field [0001] The invention relates to a high-voltage isolator, in particular to a high-voltage isolation annular core-through capacitor used in an electromagnetic interference suppression device. Background technique [0002] In recent years, along with the digitalization of information processing equipment and communication equipment, and the speeding up of information processing capability, the digital signals processed by these equipments are obviously rapidly increasing in frequency. Therefore, the noise generated in these devices tends to develop further into the high-frequency band. On the other hand, with the high voltage, miniaturization and high power of these devices, the elimination of high-power high-frequency interference clutter has been quickly listed as a subject of technical transformation in related fields. In order to eliminate high-frequency noise, electronic components that can prevent electromagnetic wave interference or suppress voltage nois...

AI Technical Summary

Problems solved by technology

However, the above-mentioned device is not ideal enough. The DC isolation voltage can reach DC3KV, and the capacitor is easily broken down at a voltage higher than 3KV, and the withstand voltage strength is not high, and the electromagnetic interference energy generated by the space electromagnetic interference source 9 is easy to Entering into the shielded cavity 8 through the dielectric seat pad 12 and the dielectric 4 of the ring plate capacitor, usually the EMI suppression ability can only reach (70-80) dB

At present, the electromagnetic interference environment is becoming increasingly harsh, and the (70-80) dB EM suppression performance cannot guarantee the safe and reliable operation of electronic equipment, especially causing serious interference to the return data signal of the CATV system and the signal in the broadband integrated information network with destruction

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