Conducted electromagnetic interference noise source identification method based on voltage parameter test ICA (independent component analysis) algorithm

Abstract

The invention discloses a conducted electromagnetic interference noise source identification method based on a voltage parameter test ICA (independent component analysis) algorithm. The method comprises the following specific steps: firstly, an artificial mains network is adopted to extract the noise voltage signal of tested equipment; secondly, independent component decomposition is performed on the obtained noise voltage signal according to the ICA algorithm, so that the waveform characteristic results of the noise voltage signal is obtained; finally, contrastive analysis is performed on the waveform characteristic results of the noise voltage signal and characteristics of signals generated by each electron device in the tested equipment to determine the specific electron device generating the noise voltage signal, and finally, the conducted electromagnetic interference noise source is determined. The conducted electromagnetic interference noise source identification method accurately and rapidly solves the problem of identification of the conducted noise source by taking the electron device as a center, is simple and high in efficiency and systematized; the noise signal is effectively isolated on the basis of ICA algorithm, so that the electron device generating the conducted noise signal can be judged more accurately, and electromagnetic interference is reduced more purposefully.

Description

technical field [0001] The invention relates to a conduction electromagnetic interference noise source identification method based on an independent component analysis (ICA) algorithm of voltage parameter testing, and belongs to the technical field of electromagnetic compatibility. Background technique [0002] Electromagnetic compatibility EMC is the abbreviation of English electromagnetic compatibility. It includes two meanings, one is that the electromagnetic radiation generated by the equipment must be limited to a certain level, and the other is that the equipment itself must have a certain anti-interference ability. EMC must have three elements: interference source, coupling channel, and sensitive body. The switching power supply that supplies power to electronic circuits is of great significance to suppress interference and ensure the normal and stable operation of electronic systems [0003] With the extensive use of power conversion equipment such as switching pow...

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Problems solved by technology

[0006] Ideally, each device is required to ensure that the electromagnetic emission generated by it is within a certain limit as much as possible, and at the same time, each device itself is required to have a certain anti-interference ability, which is very difficult to achieve. Before the two requirements, it is necessary to have a certain understanding of the electromagnetic emission of each device before it can be improved in a targeted manner, but so far there is no effective method to simultaneously detect the electromagnetic interference emitted by all electronic devices, and effectively detect the electromagnetic interference. identification, so as to improve the targeted improvement of equipment that needs to improve its electromagnetic compatibility, which is one of the problems that need to be solved urgently

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