Analysis and Suppression of Common-Mode EMI Using Synchronous Pulsed Compensation in Power Electronics

A common-mode (CM)-conducted electromagnetic interference (EMI) noise, exhibiting characteristics similar to a pulse signal, is produced during the rapid rise and fall of the drain-to-source voltage of the switching device. In order to eliminate the above CM-conducted EMI, a reverse pulse signal, wh...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2024-12, Vol.12 (6), p.5955-5965
Main Authors: Luo, Siyong, Bi, Chuang, Bao, Wei, Li, Fan, Zhou, Desheng
Format: Article
Language:English
Subjects:
Buck converters
Common-mode (CM)
Compensation
digital active EMI filter (DAEF)
Digital filters
Electromagnetic interference
electromagnetic interferences (EMIs)
Equivalent circuits
Filters
Frequency ranges
Impact analysis
Insertion loss
modeling
Noise
Power electronics
suppression
Switched mode power supplies
synchronous pulsed compensation (SPC)
Voltage
Voltage converters (DC to DC)
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Description
Summary:A common-mode (CM)-conducted electromagnetic interference (EMI) noise, exhibiting characteristics similar to a pulse signal, is produced during the rapid rise and fall of the drain-to-source voltage of the switching device. In order to eliminate the above CM-conducted EMI, a reverse pulse signal, which is denoted by a synchronous pulsed compensation (SPC) signal, is proposed in this article. First, high-frequency equivalent circuits, based on a SiC half-bridge module, are built to determine the time-domain CM-conducted EMI noise. Then, the impact of digital filter circuits with/without SPC signals on CM EMI noise is analyzed through the calculation of insertion loss (IL). In addition, the design of the SPC signal is described in detail. To implement SPC, a digital active EMI filter (DAEF) system is constructed. Next, the overall experimental setup is elaborated upon. The measurements, performed on a 1000-W buck dc-dc converter prototype, finally confirm the SPC method for CM-conducted EMI suppression in the lower-to-medium frequency range.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2024.3443849