A survey of conductive and radiated EMI reduction techniques in power electronics converters across wide‐bandgap devices

Abstract

Nowadays, wide‐bandgap (WBG) devices, primarily made from silicon carbide (SiC) and gallium nitride (GaN), are widely applied in power generation, transmission, and conversion. Moreover, the application of WBG devices has had a transformative impact in the field of energy conversion. Compared with Si counterparts, SiC and GaN can remarkably improve the power conversion system efficiency and power density while generating higher electromagnetic interference (EMI) emissions. There are many studies on WBG devices and their behaviour in power systems. However, methods of mitigating EMI/electromagnetic compatibility (EMC) still lack scientific guidance. This article reviews the characteristics of WBG devices, and the significant EMI problems are discussed. Then, the EMI types, EMI causes, and methods of EMI reduction are summarized, and the advantages and disadvantages of these methods are presented as well. Based on the reviewed studies, future research, and the conclusions of this article on EMI/EMC are discussed to help relevant researchers deepen their understanding of the new challenges of EMI brought by the applications of WBG devices, which are useful in engineering.

Design of Interleaved Winding for Multilayer Planar Inductor and Its Application in Reducing Current Ringing of LLC Resonant Converter

“…Energies 2024, 17, 1649 2 of 16 For the analysis of the parasitic capacitance of the inductor, Refs. [8][9][10] give an accurate calculation model of inductor parasitic capacitance and verify it in a DAB active full-bridge converter.…”

“…Methods for reducing the parasitic parameters of planar magnetic components were summarized in [14], and it was verified that the parasitic capacitance can be effectively reduced by optimizing the winding design. Reducing current ringing can decrease the EMI issues of converters, as demonstrated in [15][16][17][18]; thus, mitigating current ringing is an important technique to reduce the EMI problems in converters.…”

A Simple and Economical System for Automatic Near-Field Scanning for Power Electronics Converters

“…Moreover, some are related to electromagnetic pollution through the supply cables or the connections of the EUT and the load or its immunity to conducted noises through those connections. Others are related to electromagnetic pollution spread in the surrounding environment or to the sensibility of the EUT to the external radiated noise [3,4]. There are a lot of characterizations that could be performed to study these effects using electromagnetic simulation flows [5,6] or through mathematical models that are able to predict electromagnetic interference (EMI) phenomena [7,8].…”