A probe for measuring the propagation of conducted EMI in power converters

Author

Willcock, P.R. ; Ferreira, J.A. ; van Wyk, J.D.

Author_Institution

Power Electron. & Electr. Machine Fac. ITS, Delft Univ. of Technol., Netherlands

Volume

5

fYear

2000

fDate

2000

Firstpage

3091

Abstract

Conducted EMI compliance is based on a single frequency measurement at the mains input of a power converter, using a line impedance stabilisation network (LISN). A measurement method based on a new probe is proposed with which the sources and propagation of noise can be measured. The characteristics of the probe are compatible with the LISN. The method adds time and frequency measurements within the converter circuit, to the standard LISN measurement. This added measurement flexibility assists in the identification of the noisy switching transients. Attenuation is added in the probe as a means to contain the power dissipation in the 50 Ω instrument input impedance. The working of the EMI probe is illustrated with some practical measurements

Keywords

electromagnetic compatibility; electromagnetic interference; frequency measurement; instruments; power convertors; probes; switching transients; time measurement; 50 ohm; EMC; conducted EMI compliance; conducted EMI propagation; instrument input impedance; mains input; measurement flexibility; measurement probe; noisy switching transients identification; power converters; power dissipation; single frequency measurement; time measurements; Attenuation; Circuit noise; Electromagnetic interference; Frequency measurement; Impedance; Measurement standards; Noise measurement; Power measurement; Probes; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2000. Conference Record of the 2000 IEEE

Conference_Location

Rome

ISSN

0197-2618

Print_ISBN

0-7803-6401-5

Type

conf

DOI

10.1109/IAS.2000.882607

Filename

882607