Improving Effectiveness of the Use of Frequency Modulation in Power Converters

Proceedings of the 12th Biennial Baltic Electronics Conference (BEC2010) 2010
Jānis Jankovskis, Deniss Stepins, Dmitrijs Pikuļins

In the research the examination of the methods possible to improve the implementation of spread spectrum technique for EMI reduction in switch mode power supplies are searched. The analysis of effects of switching frequency modulation in open loop boost converter reveals that there is additional undesirable amplitude modulation of the input current of the converter. This effect distorted the spectrum of the input current, thus worsening the EMI reduction, achieved by the use of the frequency modulation. Experimental results, using sinusoidal and sawtooth modulating signals, proved the theoretical assumption, asserting that the effectiveness of EMI attenuation and the reduction of spectral asymmetry could be achieved choosing as high as possible operating frequencies and proper modulating profiles.

Keywords
boost converter, EMI, frequency modulation
DOI
10.1109/BEC.2010.5631683
Hyperlink
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5631683

Jankovskis, J., Stepins, D., Pikuļins, D. Improving Effectiveness of the Use of Frequency Modulation in Power Converters. In: Proceedings of the 12th Biennial Baltic Electronics Conference (BEC2010), Estonia, Tallinn, 4-6 October, 2010. Tallinn: Tallinn University of Technology, 2010, pp.327-330. ISBN 978-1-4244-7356-4. e-ISBN 978-1-4244-7358-8. ISSN 1736-3705. Available from: doi:10.1109/BEC.2010.5631683

Publication language
English (en)