Mounting structure of power EMI filter

Abstract

The invention discloses a mounting structure of a power EMI filter. The mounting structure comprises a filter body, an isolation hood and load in the isolation hood. The filter is provided with a metal shielding outer shell, the isolation hood is connected with a ground wire, an output wire and an input wire of the filter body are arranged at the two ends of the filter respectively, the input wire is electrically connected with a power component, and the output wire is electrically connected with the load. The mounting structure is characterized in that the filter body is further arranged in the isolation hood which is provided with a wire outlet where the output wire penetrates through, and the metal shielding outer shell is electrically connected with the isolation hood through a connecting piece. Welding or a screw fixed mounting mode in the prior art is replaced, dismounting and replacing of the filter are facilitated, and good electric connection of the filter body and the isolation hood is guaranteed; the ground wire is connected to the bottom of a horizontal supporting plate, and the influence of ground resistance on the filter is reduced to the largest extent. The input wire and the output wire of the filter body are fully isolated, and electromagnetic coupling between the input wire and the output wire is reduced.

Description

technical field [0001] The invention relates to an installation structure of a power supply EMI filter. Background technique [0002] The power filter is a low-pass filter used for the power port of electronic equipment, and usually has two functions of attenuating differential mode disturbance. The differential mode attenuation performance is determined by the transmission characteristics of the filter, and it is usually easier to achieve as long as it is selected properly; while the common mode attenuation performance is related to the installation method of the filter and the way of accessing the equipment. Power filters are widely used in relay protection and control equipment in substations, but there are problems that configuration selection and improper installation affect their performance, and cause power modules to be easily damaged and have a short service life. For example, the service life of an electronic device should be 10 years, and the parts in it should b...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a power supply EMI filter installation structure, and solve the problem of obvious electromagnetic coupling between the input line and the output line of the filter caused by improper installation of the filter in the prior art. technical problem

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