Title :
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
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;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.882607
