Open AccessQuantification description of the chaotic PWM spectrum of the switching converter
Author(s) -
Rongqian Yang,
Bo Zhang
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.5667
Subject(s) - chaotic , waveform , emi , spectral density , pulse width modulation , converters , probability density function , computer science , power (physics) , function (biology) , modulation (music) , control theory (sociology) , physics , electromagnetic interference , electronic engineering , mathematics , telecommunications , acoustics , engineering , statistics , artificial intelligence , radar , control (management) , quantum mechanics , evolutionary biology , biology
EMI of the switching-converter is decided by the spectrum of the PWM waveform. There is great theoretical and practical meaning to quantify and analysis them. This paper takes the PWM drive waveform as a time series of processes or events. Based on the analysis of the periodic frequency- spreading, statistical theory is applied to analyze the probability density function, characteristic function, invariable distribution and power spectral density of the PWM waveform under chaotic frequency-spreading, the characteristics of chaotic frequency-spreading are obtained. Finally, some feasible experiments are carried out which verified that the EMI of the switching converters is suppressed effectively by chaotic frequency-spreading.