DocumentCode :
3103052
Title :
Identification of Conducted Noise Causes through CWT in a Boost PFC
Author :
Coppola, L. ; Buso, S. ; Liu, Q. ; Boroyevich, D. ; Bell, A.
Author_Institution :
Dept. of Electr. Eng., Padova Univ.
fYear :
2005
fDate :
16-16 June 2005
Firstpage :
2216
Lastpage :
2221
Abstract :
Limiting harmonics in the conducted noise of switch mode power supplies is very important, but finding the causes of harmonics to get the best solution to the electromagnetic interference (EMI) problem is often complex. A new tool for the search of conducted noise causes is presented: the more significant harmonics in the EMI receiver measurement are searched in the time evolution of the line impedance stabilization network (LISN) voltage by using the continuous wavelet transform (CWT). In the time frames where the harmonics are present, similar harmonic contents are searched for in the waveforms of the circuit, because these are the causes of the conducted noise. An example of application is described: signals of a boost PFC are processed in different ways to be compared to the EMI receiver measurements of LISN voltage spectrum. The CWT results match pretty well and give some further information than the Fourier transform does
Keywords :
electric impedance; electromagnetic interference; harmonic analysis; power factor correction; stability; switched mode power supplies; wavelet transforms; CWT; EMI receiver measurement; Fourier transform; boost PFC; conducted noise identification; continuous wavelet transform; electromagnetic interference; harmonic contents; line impedance stabilization network; switch mode power supplies; Continuous wavelet transforms; Electromagnetic interference; Electromagnetic measurements; Impedance measurement; Noise measurement; Power supplies; Power system harmonics; Switches; Time measurement; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
Type :
conf
DOI :
10.1109/PESC.2005.1581940
Filename :
1581940
Link To Document :
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