High-frequency common-mode filter

Abstract

The invention relates to the technical field of common-mode filters, and discloses a high-frequency common-mode filter which is characterized in that sliding grooves are formed in the two sides of the inner wall of a shell, a limiting column is fixedly connected to the center of the lower surface of a winding framework, and clamping grooves are formed in the centers of the two sides of the limiting column; sliding blocks slidably connected into the sliding grooves are fixedly connected to the two sides of the winding framework correspondingly, clamping mechanisms are installed on the two sides of the limiting column correspondingly, and a protection mechanism is further installed at the bottom of the shell. According to the common mode filter, the winding framework can be quickly disassembled from the shell through the clamping mechanism, meanwhile, labor is saved during installation, the disassembly and assembly time of the winding framework is greatly shortened, a user can conveniently and regularly maintain the winding framework and replace accessories, the periphery of the common mode filter can be protected through the protection mechanism, the damage of an external force to the morning is reduced; moreover, the protection mechanism is easy to adjust, can be flexibly adjusted according to the actual sizes of different common-mode filters, and is wide in application range.

Description

technical field [0001] The invention relates to the technical field of common-mode filters, in particular to a high-frequency common-mode filter. Background technique [0002] Common-mode filters usually use ferrite cores and two wires are wound in parallel. The low differential mode noise signal rejects interference sources and is difficult to distort in high-speed signals. Good noise suppression countermeasures, high common-mode noise rejection and low differential-mode noise signal rejection, the common-mode filter design is relatively simple, including common-mode capacitors, unbalanced transformers or common-mode inductors. The common-mode capacitor shunts the common-mode current of the two input lines to the ground, and the common-mode inductor presents a balanced impedance, that is, the impedance in the power line and the ground line is equal, and this impedance presents an impedance characteristic to common-mode noise. [0003] However, when the existing common-mod...

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Problems solved by technology

[0003] However, when the existing common-mode filter is in use, it is difficult to quickly remove the winding frame from the housing, and at the same time, it is relatively cumbersome to install. At the same time, the periphery of the common-mode filter lacks protective measures and is easily damaged by external force impacts. Phenomenon

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