共模电流扫描法在汽车电子部件电磁辐射预测中的研究与应用

doi:10.19595/j.cnki.1000-6753.tces.170374

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Abstract Absorber lined shielded enclosure (ALSE) method of automotive electromagnetic compatibility (EMC) standard CISPR 25, also called the antenna method, requires a large anechoic chamber. However, the main measure of this method is the common-mode current distribution of the test cable bundle. Since this current distribution can be measured easily by current clamps that have much lower demands to the environment, it is possible to predict the level of radiated fields from the measured current distribution. This paper presents a field prediction method, which combines a measured common-mode (CM) current distribution with numerical computations for the radiated fields in the frequency range of 30~1 000MHz. Accordingly, three major problems can be solved compared with ALSE method. First, fast Fourier transform (FFT) based time-domain current or fitting algorithm based frequency-domain current amplitude can derive the needed phase distribution, for estimating the electric fields. Second, the radiation level produced by the common mode current can be calculated based on the common-mode radiation models of a cable bundle and a ground plate. Third, a calibration method is proposed to take into account the actual test environment of ALSE. Different solution approaches have verified the proposed prediction method.

Key words： Absorber lined shielded enclosure (ALSE) antenna method CISPR 25 radiated emission cable bundle common-mode current phase

Received: 01 April 2017 Published: 24 April 2018

PACS:	TM15
	O441

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	Jia Jin
	Lai Zhida
	Wang Ruimiao
	Wang Quandi

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Jia Jin,Lai Zhida,Wang Ruimiao等. Research and Application on Common-Mode Current Scan Methods to Predict Radiated Emissions of Automotive Components[J]. Transactions of China Electrotechnical Society, 2018, 33(8): 1674-1684.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170374 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I8/1674

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