Analysis of Output Voltage of Switching Frequency Modulated DC-DC Converter Operating in Discontinuous Conduction Mode

Proceedings of the IEEE International Symposium on Industrial Electronics (ISIE 2010) 2010
Deniss Stepins

In this paper analysis of output voltage ripples of a switching frequency modulated (SFM) buck converter operating in discontinuous conduction mode (DCM) is performed. The ripples are analyzed in both time and frequency domains by the use of theoretical derivations and computer simulations. Significant increase in output voltage ripples under DCM is observed after using periodic SFM. Low frequency variations at modulation frequency are considered as the most problematic. Cause of the problem is revealed. Influence of main nonidealities of the converter and modulation parameters on the output voltage ripples is analyzed. Experimental verification is also performed to confirm the theoretical evaluations and simulation results. The analysis can give useful information when designing a SFM power converter.

Atslēgas vārdi
power converters, frequency modulation, voltage ripples
DOI
10.1109/ISIE.2010.5637199
Hipersaite
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5637199

Stepins, D. Analysis of Output Voltage of Switching Frequency Modulated DC-DC Converter Operating in Discontinuous Conduction Mode. No: Proceedings of the IEEE International Symposium on Industrial Electronics (ISIE 2010), Itālija, Bari, 4.-7. jūlijs, 2010. Bari: IEEE Industrial Electronics Society, 2010, 670.-675.lpp. ISBN 978-1-4244-6390-9. Pieejams: doi:10.1109/ISIE.2010.5637199

Publikācijas valoda
English (en)