NDLI: Transfer functions and current distribution algorithm for the calculation of radiated emissions of automotive components

Content Provider	IEEE Xplore Digital Library
Author	Schneider, D. Bottcher, M. Schoch, B. Hurst, S. Tenbohlen, S. Kohler, W.
Copyright Year	2013
Description	Author affiliation: Inst. of Power Transm. & High Voltage Technol., Univ. of Stuttgart, Stuttgart, Germany (Schneider, D.; Bottcher, M.; Schoch, B.; Hurst, S.; Tenbohlen, S.; Kohler, W.)
Abstract	Radiated emission testing of electric components, modules and systems is mandatory. Such tests are performed in absorber-lined shielded enclosures during the development process. Due to strict time schedules, limited access to EMC measurement facilities and cost reasons, alternative methods are needed. This contribution presents an approach for a pre-compliance test method for radiated emissions of automotive components. It is adapted to gain measurement results according to the CISPR 25 standard. The later operation site of this pre-compliance test method is the developer's laboratory setup. For obtaining the radiated field strength of an tested device common mode currents on the cable harness are measured. As the current distribution along a harness is needed for accurate calculation in higher frequency ranges, an algorithm is presented retrieving the current distribution out of current probe measurements. Those current distributions in combination with multiple transfer functions lead to a calculation of the electrical field strength. Transfer functions represent the correlation between common mode current in the defined test setup environment and their electric field strengths. The methodology of transfer functions using a vector network analyzer will be explained. The transfer functions for a single segment and multiple segments will be verified, compared, and applied to a realistic test setup.
Starting Page	443
Ending Page	448
File Size	490877
Page Count	6
File Format	PDF
ISBN	9781467349802
ISSN	23250364
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-02
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	EMC Europe Foundation
Subject Keyword	Antenna measurements CISPR 25 Power cables Pre-Compliance Test Transfer Functions Radiated Emission Current distribution Electromagnetic compatibility EMC Frequency measurement Electric fields
Content Type	Text
Resource Type	Article

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