An evaluation of the spectral characteristics of switching converters with chaotic carrier-frequency modulation
Tse, K.K.
Ng, R.W.-M.
Chung, H.S.-H.
Hui, S.Y.R.
Johnson Electric;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb 2003
Volume: 50,
Issue: 1
On page(s): 171- 182
ISSN: 0278-0046
INSPEC Accession Number: 7517990
Digital Object Identifier: 10.1109/TIE.2002.807659
Current Version Published: 2003-01-29
Abstract
This paper presents an evaluation of the spectral characteristics of switching converters with a chaotic carrier-frequency modulation scheme (CCFMS). By incorporating a Chua's circuit (CC) into the pulsewidth modulator for driving the switches, three modulation schemes, including the standard pulsewidth modulation scheme, periodic carrier-frequency modulation scheme, and CCFMS, can be realized with the CC in equilibrium, limit cycle, and chaos, respectively. The property of frequency spreading in CCFMS is studied by using a statistical analysis method. The developed model is applied to formulate the power spectral densities of the input current and the output voltage of the three basic DC/DC converters under CCFMS. Theoretical predictions are verified with experimental measurements.
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