Version 1
: Received: 18 August 2021 / Approved: 19 August 2021 / Online: 19 August 2021 (10:43:55 CEST)
How to cite:
de Beer, A. Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture. Preprints2021, 2021080401. https://doi.org/10.20944/preprints202108.0401.v1
de Beer, A. Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture. Preprints 2021, 2021080401. https://doi.org/10.20944/preprints202108.0401.v1
de Beer, A. Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture. Preprints2021, 2021080401. https://doi.org/10.20944/preprints202108.0401.v1
APA Style
de Beer, A. (2021). Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture. Preprints. https://doi.org/10.20944/preprints202108.0401.v1
Chicago/Turabian Style
de Beer, A. 2021 "Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture" Preprints. https://doi.org/10.20944/preprints202108.0401.v1
Abstract
This article is a big picture of how electrical noise or conducted Electromagnetic Interference (EMI) is generated and mitigated in power converters. It gives an overview of what EMI in power converters is – from generation through to conduction and mitigation. It is meant to cover the complete subject as a summary so that the reader will have an outline of how to control conducted EMI by design (where possible) and how to mitigate by filtering. A clear distinction is made between Differential Mode (DM) and Common Mode (CM) EMI generation and mitigation. By using a boost converter as an example the trade-offs for DM noise control are discussed. It is shown how CM EMI is generated in a boost converter using the concept of the “Imbalance Difference Model” (IDM). Practical measurements for an in-line power filter is given showing the effect of the filter on the total EMI of a boost converter. Measurements for the CM current produced due to the imbalance difference for different values of the boost conductor are also shown. The main contribution of this study is linking CM noise generation to DM EMI. It is shown that CM noise is a direct consequence of DM noise (although circuit imbalance and coupling to a common ground also play a role). This paper will be useful to designers seeking the “bigger picture” of how EMI is generated in power converters and what can be done to mitigate the noise.
Keywords
Power Converters; Power Electronics; Electromagnetic Interference; EMI; Noise; Differential Mode; DM; Common Mode; CM; Imbalance Difference Model; Boost Converter
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
