Modeling method of conducted electromagnetic interference receiver

A technology of conducted electromagnetic interference and modeling method, which is applied in the field of modeling conducted electromagnetic interference receivers, can solve problems such as increasing design costs, and achieve the effects of reducing the amount of calculation, reducing costs, and shortening the time

Inactive Publication Date: 2017-05-10
SOUTHEAST UNIV
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Problems solved by technology

At this stage, the electromagnetic compatibility issue is usually only really considered at the final stage of product launch, which greatly increases the design cost

Method used

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  • Modeling method of conducted electromagnetic interference receiver
  • Modeling method of conducted electromagnetic interference receiver
  • Modeling method of conducted electromagnetic interference receiver

Examples

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Embodiment

[0029] Example: The frequency range of conducted electromagnetic interference [150kHz~30MHz] is divided into 7463 frequency points with a step size of 4kHz, and the frequency component corresponding to each frequency point is multiplied by the window function corresponding to the frequency to obtain 7463 window passing functions The following frequency points and their frequency components. Such as Figure 5 , is a schematic diagram of the window function specified in the international standard CISPR16-1-1. In the figure, the dotted line indicates the maximum bandwidth specified by CISPR16-1-1, and the solid line indicates the minimum bandwidth specified by the international standard CISPR16-1-1. The designed window function needs to be between the maximum bandwidth and the minimum bandwidth. 7463 frequency points correspond to 7463 window functions. Each window function is different only in the center frequency and has the same shape. The window function corresponding to th...

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Abstract

The invention relates to a modeling method of a conducted electromagnetic interference receiver. The modeling method comprises the steps of a data pre-processing stage, a screening frequency point window-passing stage and a detection and image-drawing stage. The modeling method specifically comprises the following steps: in the data pre-processing stage, intercepting a plurality of entire periods for an extracted voltage waveform, and performing pre-processing operations such as equal distance evenly spaced; in the screening frequency point window-passing stage, performing Fourier transform on the preprocessed data to screen frequency points in a conducted electromagnetic interference frequency range, successively multiplying window functions corresponding to the frequency points, and then performing Fourier inversion on the window-passing frequency points to obtain time domain wave forms corresponding to the frequency points; and in the detection and image-drawing stage, separately performing detection in three different modes on the time domain waveforms corresponding to the frequency points, and obtaining corresponding detection result; and finally, drawing an image of the detection results and electromagnetic compatible standards corresponding to the detection modes. On the premise of no hardware receiver, a function of the receiver is realized through software to estimate whether the conducted electromagnetic interference exceeds the standard or not.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility, in particular to a modeling method of a conduction electromagnetic interference receiver. The software method can obtain the frequency and corresponding amplitude of conduction electromagnetic interference, and realize the conduction electromagnetic interference test of products without a hardware receiver. Background technique [0002] According to the definition in the national standard GB / T4365 Electromagnetic Compatibility (EMC) terminology, electromagnetic compatibility refers to the ability of a device or system to work normally in its electromagnetic environment without causing unacceptable electromagnetic disturbance to anything in the environment. Electromagnetic compatibility (EMC) includes two aspects of electromagnetic interference (EMI) and electromagnetic susceptibility (EMS). Electromagnetic interference (EMI) is the degradation of equipment, transmission channels or sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/001
Inventor 孙伟锋刘琦夏熙朱俊杰钱钦松陆生礼时龙兴
Owner SOUTHEAST UNIV
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