Optimization of Modulation Waveforms for Improved EMI Attenuation in Switching Frequency Modulated Power Converters

Advances in Electrical and Electronic Engineering 2015
Deniss Stepins, Jin Huang

Electromagnetic interference (EMI) is one of the major problems of switching power converters. This paper is devoted to switching frequency modulation used for conducted EMI suppression in switching power converters. Comprehensive theoretical analysis of switching power converter conducted EMI spectrum and EMI attenuation due the use of traditional ramp and multislope ramp modulation waveforms is presented. Expressions to calculate EMI spectrum and attenuation are derived. Optimization procedure of the multislope ramp modulation waveform is proposed to get maximum benefits from switching frequency modulation for EMI reduction. Experimental verification is also performed to prove that the optimized multislope ramp modulation waveform is very useful solution for effective EMI reduction in switching power converters.

Keywords
Electromagnetic interference, frequency modulation, optimization, switching power converter
DOI
10.15598/aeee.v13i1.1142
Hyperlink
http://advances.utc.sk/index.php/AEEE/article/view/1142/1034

Stepins, D., Huang, J. Optimization of Modulation Waveforms for Improved EMI Attenuation in Switching Frequency Modulated Power Converters. Advances in Electrical and Electronic Engineering, 2015, Vol.13, No.1, pp.10-21. ISSN 1336-1376. e-ISSN 1804-3119. Available from: doi:10.15598/aeee.v13i1.1142

Publication language
English (en)