Effects of increasing switching frequency in frequency modulated power converters

Author

Jankovskis, Janis ; Stepins, Deniss ; Pikulins, Dmitrijs

Author_Institution

Inst. of Radioelectron., Riga Tech. Univ., Riga, Latvia

fYear

2010

fDate

11-12 Nov. 2010

Firstpage

115

Lastpage

118

Abstract

The paper considers the effect of increasing switching frequency on a frequency modulated (FM) buck converter parameters: efficiency, output voltage ripples and electromagnetic interference (EMI) attenuations. The converter operating in continuous and discontinuous conduction modes (CCM and DCM respectively) is analyzed analytically, by simulations in Simulink and experimentally. The results obtained show that increasing switching frequency can significantly reduce the ripples (especially in DCM) and improve effectiveness of the use of FM to reduce EMI. Impact of increasing the switching frequency on efficiency of FM converter is also studied. It is found out that FM does not affect efficiency within the broad range of switching frequencies. The analysis provides useful data to improve the effectiveness of the use of FM in switchmode converters.

Keywords

electromagnetic interference; frequency convertors; frequency modulation; switching convertors; EMI attenuations; FM converter; Simulink; buck converter; continuous conduction modes; discontinuous conduction modes; electromagnetic interference attenuations; frequency modulated power converters; switching frequency; switchmode converters; Attenuation; Converters; Electromagnetic interference; Frequency modulation; Switches; Switching frequency; EMI attenuation; efficiency; frequency modulation; output voltage ripples;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Telecommunications (ISETC), 2010 9th International Symposium on

Conference_Location

Timisoara

Print_ISBN

978-1-4244-8457-7

Type

conf

DOI

10.1109/ISETC.2010.5679316

Filename

5679316