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Mode extraction apparatus and mode extraction method for conductive interference noise

A technology of conductive interference and extraction devices, which is applied in the direction of measuring devices, electromagnetic field characteristics, instruments, etc., can solve the problems of consuming equipment investment funds and testing costs, consuming production costs, wasting resources and product competitiveness, etc., to achieve market users and The effect of obvious demand and wide application

Inactive Publication Date: 2006-02-08
NANJING NORMAL UNIVERSITY
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Problems solved by technology

That is, in the product design, the electromagnetic compatibility factor is basically ignored or the electromagnetic compatibility factor is overemphasized. The former is tested after the product design is completed. Once the product fails to pass the national EMC enforcement standard, the product can only be reworked; while the latter is in the product development process. Consumed a lot of unnecessary equipment investment funds and testing costs, human resources and other resources
Both will greatly consume the production cost of the enterprise, resulting in the waste of various resources and the decline of product competitiveness.

Method used

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  • Mode extraction apparatus and mode extraction method for conductive interference noise
  • Mode extraction apparatus and mode extraction method for conductive interference noise
  • Mode extraction apparatus and mode extraction method for conductive interference noise

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Embodiment Construction

[0031] figure 1Comprehensive analysis and comparative test platform scheme 1 for the performance of conducted electromagnetic interference noise mode extraction. The CM / DM output terminal of the separation network is connected to the HP 8753C network analyzer, the input terminal is connected to the HP 85047A frequency sweep signal source (10K~30M) through a 0-degree / 180-degree power divider, and the DM / CM output terminal is connected to a 50ohm terminator.

[0032] figure 2 Comprehensive analysis and comparative test platform scheme 2 for the extraction performance of conducted electromagnetic interference noise mode. In the low frequency band, use SP1641B function signal generator, its frequency range is 1-3MHz, in the high frequency band, use SG-4162AD, its frequency range is 100KHz-150MHz. The frequency range required in the network performance test is 10KHz-30MHz. The 0 / 180 degree splitter is used to obtain the required common mode or differential mode input signal. Th...

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Abstract

The invention relates to a conducted interference noise structure extracting device and structure extracting method, which dose structure extracting and feature analyzing to the EMI noise to obtain the structure extracting network capability method and device. The device is formed by a conducted noise identifying device (1), a noise character analysis network (2), an interference noise receiver (3) and a tested device (4), wherein the input end of the conducted noise identifying device (1) is connected with the stage line, the earth line and the center line of the power system; the output end of the conducted noise identifying device (1) is connected with the stage line, the earth line and the center line of the tested device (4) and the input end of the noise character analysis network (2); the output end of the noise character analysis network (2) is connected with the interference noise receiver (3).

Description

technical field [0001] The present invention performs mode extraction and feature analysis on conductive electromagnetic interference (EMI) noise, and obtains a method and device capable of judging the performance of the conductive electromagnetic interference noise mode extraction network, and belongs to the technical field of electromagnetic compatibility equipment. Background technique [0002] At present, on the issue of conductive electromagnetic interference noise at home and abroad, we basically stay at the stage of how to design and manufacture a noise separation network DN (discrimination network) based on different hardware cores and circuit structures to extract modal noise from strong current lines. Based on the above-mentioned theoretical starting point, the present invention conducts systematic theoretical analysis and parameter performance improvement research on noise extraction network characteristics based on various hardware cores, and completes a set of pr...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R29/08
Inventor 赵阳李世锦
Owner NANJING NORMAL UNIVERSITY
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