Distributed inductance and capacitance parameter integrated filter

Abstract

A distributed inductance and capacitance parameter integrated filter comprises an inner magnetic core and an outer magnetic core which are magnetically conductive, conductive and grounded. One end ofthe inner magnetic core is connected with the outer magnetic core through threads, and the other end of the inner magnetic core is covered with an end cover which is magnetically conductive. The innermagnetic core, the outer magnetic core and the end cover are fixed through screws to form a closed magnetic circuit and an electromagnetic shielding shell. A surface-insulated filter wire penetratesthrough one end of the outer magnetic core and is tightly wound on the inner magnetic core, and grounded wires are wound between turns of the filter wire in parallel to form turn-to-turn isolation wires, so that turn-to-turn capacitive coupling is prevented. And the filtering wire penetrates out of the end cover at the other end. When a multi-layer winding method is adopted, a grounded interlayerisolation metal layer is additionally arranged between layers. According to the invention, the inductance-capacitance formed by the distribution parameters is fully utilized. The adverse effect of distributed capacitance parameters in an original independent inductor on the inductor is overcome; the adverse effect of the distributed inductance parameters in the independent capacitor device on thecapacitor is avoided. The adverse parameters are changed into favorable parameters, the high-frequency performance of the filter is improved, the order of the filter can be reduced, the structure of the filter is simplified, the size of the filter is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to a filter, in particular to a passive low-pass filter integrated with distributed inductance and capacitance parameters. Background technique [0002] In the information society, electronic information equipment is widely used, and the electromagnetic compatibility between equipment must be considered and resolved. Common methods to solve electromagnetic compatibility problems include shielding, filtering, and grounding. Filtering is an effective means to suppress conductive electromagnetic interference. The filtering of cables is to install filters on the equipment shell or the wall of the shielding room. Passive low-pass filters are most widely used in solving cable electromagnetic compatibility problems. The traditional passive low-pass filter is composed of multiple individual inductors and capacitors, and the traditional inductors and capacitors do not have a single inductance parameter and capacitance parameter. Inductor...

AI Technical Summary

Problems solved by technology

The traditional passive low-pass filter is composed of multiple individual inductors and capacitors, and the traditional inductors and capacitors do not have a single inductance parameter and capacitance parameter. Inductors have distributed capacitance parameters, and capacitors have distributed inductance parameters, which affect their High frequency performance complicates filter design and manufacture and greatly increases cost

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