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Validation of a Measurement Method for Magnetic Shielding Effectiveness of a Wire Mesh Enclosure with Comparison to an Analytical Model : Volume 11, Issue 12 (04/07/2013)

By Kühn, M.

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Book Id: WPLBN0003987543
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Validation of a Measurement Method for Magnetic Shielding Effectiveness of a Wire Mesh Enclosure with Comparison to an Analytical Model : Volume 11, Issue 12 (04/07/2013)  
Author: Kühn, M.
Volume: Vol. 11, Issue 12
Language: English
Subject: Science, Advances, Radio
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Kühn, M., Weigel, R., & John, W. (2013). Validation of a Measurement Method for Magnetic Shielding Effectiveness of a Wire Mesh Enclosure with Comparison to an Analytical Model : Volume 11, Issue 12 (04/07/2013). Retrieved from http://www.ebooklibrary.org/


Description
Description: AUDI AG, 85045 Ingolstadt Germany. This paper deals with the validation of a measurement method for determining the magnetic shielding effectiveness of a wire mesh enclosure in the frequency range from 10 kHz to 150 kHz. The comparison with an analytical model (parallel-plate-shield, see Kaden, 1959) for magnetic shielding effectiveness of wire mesh is also part of this contribution. To measure the shielding effectiveness of an enclosure in general, two steps are necessary:

1. Reference measurement of the incident electro-magnetic field.
2. Measurement of the incident electro-magnetic field in the enclosure by same conditions.

This method presented in the contribution uses a Helmholtz coil as magnetic field source, controlled by a signal generator and an amplifier in voltage mode. At first, a field meter was used to measure the frequency dependent magnetic field in the center of the Helmholtz coil. The magnetic field strength was also analytically calculated and compared to the measurement results. The next step was to measure the induction voltage caused by the magnetic field with a magnetic field probe, which was later used for the measurements of the shielding effectiveness either. A signal amplifier was needed to raise the signal-to-noise-ratio (SNR). The gain of the signal amplifier was also determined and measured. Two positions of the enclosure in the Helmholtz coil were considered, horizontal and vertical. The vertical position of the enclosure approaches the analytical model of Kaden (1959) closely and the results show a good match with the analytical model.


Summary
Validation of a measurement method for magnetic shielding effectiveness of a wire mesh enclosure with comparison to an analytical model

Excerpt
Kaden, H.: Wirbelströme und Schirmung in der Nachrichtentechnik, Springer-Verlag, 2. Auflage, 1959.; DIN EN 61000-5-7; Elektromagnetische Verträglichkeit (EMV) – Teil 5–7: Installationsrichtlinien und Abhilfemaßnahmen; Schutzarten durch Gehäuse gegen elektromagnetische Störgrößen (EM-Code), Beuth Verlag, 2001.; CISPR 25; Vehicles, boats and internal combustion engines-Radio disturbance characteristics-Limits and methods of measurement for the protection of on-board receivers, Edition 3, 2007.; Hillmer, C., Mayer, M.-O., and Reinhardt, U.: EMV von Elektro-Hybridfahrzeugen, in: Vortrag der 5. GMM-Fachtagung München, 2009.; Casey, K.: Electromagnetic shielding behavior of wire-mesh screens, IEEE Transactions on Electromagnetic Compatibility, 30, 298–306, doi:10.1109/15.3309, 1988.; Kistenmacher, P., Kimmel, M., and Schwab, A.: Schirmdämpfung inhomogener Metallgehäuse beliebiger Kontur im quasistationären Magnetfeld, Electrical Engineering 78 Springer-Verlag-Verlag, 339–344, 1995.; Michel, M.: Leistungselektronik: Einführung in Schaltungen und deren Verhalten, Springer-Verlag, 5. Auflage, 2011.; Schwab, A. and Kürner, W.: Elektromagnetische Verträglichkeit, VDI-Buch, Springer-Verlag, 6. Auflage, 2010.; Wolfsperger, H.: Elektromagnetische Schirmung: Theorie Und Praxisbeispiele, VDI-Buch, Springer-Verlag, 2008.


 

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