Authors: Jia, Jin
Title: Current scan methods to predict radiated emissions of automotive components according to CISPR 25
Language (ISO): en
Abstract: High density of electrical modules and electronic control units are, nowadays, extensively integrated into modern automotive systems. Estimate and further control the electromagnetic emissions from these components tend to be increasingly indispensable before marketing them. Full-compliance Absorber Lined Shielded Enclosure (ALSE) method or so-called antenna method according to CISPR 25, gives a standardized test configuration to estimate the radiated emissions on component level. However, this emission test method often suffers from the need of a large anechoic chamber, where often only the integrated impact of common-mode current on the test cable bundle is measured. Availability of a specific-size anechoic chamber and repeated experimental runs after a test failure increase the cost for the development of a new product. Since the common-mode current can be measured quite easily, it is promising to estimate the level of radiated emissions directly from the measured current. This thesis aims to develop a common-mode current based method to predict the radiated emissions according to CISPR 25 and discuss its applicability based on several complex test cases. Different problems linked to this approach have to be solved. Firstly, appropriate common-mode current acquisition methods are required. Secondly, a flexible common-mode radiation model of the cable bundle is required. Thirdly, in order to get comparable data the real ALSE-test environment has to be taken into account. For the mentioned problems, different solutions are developed and discussed. The proposed solutions are applied to several cable structures and a real stepper-motor drive system. Capabilities and limitations are shown and discussed.
Subject Headings: Current scan
Radiated emissions
Automotive components
Issue Date: 2015
Appears in Collections:Arbeitsgebiet Bordsysteme

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