Analysis and mitigation of conducted EMI in current mode controlled DC–DC converters. Issue 4 (11th February 2019)

• Record Type: Journal Article
• Authors: Subramanian, Archana; Govindarajan, Uma
• Is Part Of: IET power electronics. Volume 12:Issue 4(2019)
• Page Start: 667
• Page End: 675
• Publication Date: 2019-02-11
• Subjects: power electronics -- electromagnetic interference -- electromagnetic compatibility -- switching convertors -- DC‐DC power convertors -- electric current control -- stability; conducted EMI -- power electronic circuits -- electromagnetic interference -- electronic equipment -- electromagnetic compatibility standards -- stable periodic operation -- pulsating DC voltage -- stiff DC voltage -- light loading conditions -- nonfeedback control technique -- PEC -- higher‐order DC‐DC converter -- current mode controlled DC‐DC converters; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2018.5322
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : Practically, power electronic circuits (PECs) generate electromagnetic interference (EMI) which influence the operation of electronic equipment and may create instabilities. PECs must comply with electromagnetic compatibility standards for stable periodic operation but indeed fail under certain conditions. This study reports the effect of conducted EMI in a current mode controlled higher‐order DC–DC converter fed from a pulsating DC voltage instead of a stiff DC voltage. The converter is found to be a source of conducted EMI under light loading conditions adversely affecting the systems' stability. A non‐feedback control technique is implemented to mitigate the instabilities caused by EMI and to make the system electromagneticaly compatible. A mathematical model is developed to describe the dynamics involved. Simulation and experimental results are presented to support the analyses documented.