Open AccessAnalysis and mitigation of conducted EMI in current mode controlled DC–DC converters
Author(s) -
Subramanian Archana,
Govindarajan Uma
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5322
Subject(s) - emi , converters , electromagnetic interference , electromagnetic compatibility , electronic circuit , voltage , electrical engineering , electronic engineering , conducted electromagnetic interference , common mode signal , power electronics , power (physics) , engineering , computer science , physics , digital signal processing , quantum mechanics , analog signal
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.