Analysis and Comparison of the Radiated Electromagnetic Interference Generated by Power Converters With Si MOSFETs and GaN HEMTs

2020 ◽  
Vol 35 (8) ◽  
pp. 8050-8062 ◽  
Author(s):  
Yingjie Zhang ◽  
Shuo Wang ◽  
Yongbin Chu
Keyword(s):  
Electromagnetic Interference ◽  
Power Converters ◽  
Gan Hemts

scholarly journals Radiated EMI from power converters

2005 ◽  
Vol 2 (2) ◽  
pp. 117-124 ◽  
Author(s):  
Vesna Arnautovski-Toseva ◽  
Yanis Rousset ◽  
El Drissi ◽  
Leonid Grcev
Keyword(s):  
Electromagnetic Interference ◽  
Power Converters ◽  
Local System ◽  
Power Converter ◽  
Switching Frequency ◽  
Electronic Systems ◽  
Continuous Increase ◽  
Safe Level ◽  
Full Wave ◽  
Layout Geometry

With the continuous increase of switching frequency together with the ongoing trend to higher complexity and functionality, power converters as a part of electronic systems have raised more and more electromagnetic energy pollution to the local system environment. In the same time, stringent demands are imposed on the designers of new circuits that electromagnetic interference (EMI) has to be suppressed at its source before it is allowed to propagate into other circuits and systems. In this paper, the authors present a full-wave numerical method for calculation and simulation of electromagnetic field radiated by power converter circuitry. The main objective is to analyze the layout geometry in order to obtain competitive PCB layout that will enable suitably attenuated level of the radiated electric field to safe level. By this it would be possible to ensure reliable operation of the sensitive electronic components in the proximity.

scholarly journals Generation and Mitigation of Conducted Electromagnetic Interference in Power Converters – A Big Picture

2021 ◽  
Author(s):  
Arnold de Beer
Keyword(s):  
Electromagnetic Interference ◽  
Common Ground ◽  
Power Converters ◽  
Direct Consequence ◽  
Boost Converter ◽  
Differential Mode ◽  
Power Filter ◽  
Trade Offs ◽  
Big Picture ◽  
Conducted Emi

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.

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