EPE Association: EPE 2021 - EMI/EMC in Power Electronics including HF Phenomena

EPE 2021 - EMI/EMC in Power Electronics including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2021 ECCE Europe - Conference > EPE 2021 - Topic 03: Measurement and Control > EPE 2021 - EMI/EMC in Power Electronics including HF Phenomena

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   Analysis of EMI Filter Attenuation under the Influence of Parasitic Elements of Components and their Mutual Couplings
By Mohammad ALI [View]
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Abstract: Attenuation of EMI filters strongly depends on the mutual couplings among filter components and their parasitics. This paper explains and analyzes such effects of filter components. Analytical, numerical, and experimental methods are used in a systematic way, considering single- and three-phase EMI filters as examples. It is shown that several paths of couplings and parasitics reduce the filter performance significantly. A separate discussion of the impact on differential- and common-mode behavior is shown in detail, showing further potential in the methods for filter improvement.

   Comparison of Common-Mode EMI Noise in a Phase-Shifted and Hard-Switched Full-Bridge Forward Converters
By Ishtiyaq Ahmed MAKDA [View]
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Abstract: This paper presents the comparison of the common-mode (CM) noise in widely-used phase-shifted (PSFC) and hard-switched (HSFC) full-bridge forward converters. The CM noise voltages across the interleaved transformers' coupling capacitances - one of the significant parasitic coupling capacitances in the isolated converters - are analyzed for both types of switching schemes. Experimental prototypes are built for both switching techniques to verify the CM noise models and their analyses. In contrast to the state-of-the-art belief, the comparison reveals that PSFC generates far more CM noise than its counterpart for the same operating parameters.

   Design Methodology for Dimensioning EMI Filters for Traction Drives with SiC Inverters
By Hedieh MOVAGHARNEJAD [View]
[Download]

Abstract: This paper presents a straightforward design methodology for dimensioning EMI filters with consideration of CISPR 25 standard EMI borderlines. In this paper, the influence of switching frequency on dimensioning of EMI filters has been studied, and the results demonstrate that the use of 2-stage EMI filters offers higher power density. Besides, a design approach is proposed for the common-mode (CM) choke design, which results in the optimal selection of CM chokes and avoids over dimensioning.

   Reduction of Common Mode EMI Emissions by Optimizing the Planar Transformer of Phase-Shifted Full-Bridge DC/DC Converters
By Achim VEDDE [View]
[Download]

Abstract: An increasing number of isolated converters are designed with planar transformers to reduce the size of the converters. These highly integrated transformers usually have flat windings with a large surface which results in high parasitic capacitances in the transformers. One of the main common mode EMI paths in isolated DC/DC converters are the inter-winding capacitances of transformers. This paper focuses on an optimized design of planar transformers for the reduction of EMI emissions to decrease the filter effort. Therefore, different transformer structures are investigated and an optimized setup with a minimized inter-winding capacitance is analyzed and built up in a prototype. The proposed optimized design is verified by simulations and measurements.

EPE 2021 - EMI/EMC in Power Electronics including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2021 ECCE Europe - Conference > EPE 2021 - Topic 03: Measurement and Control > EPE 2021 - EMI/EMC in Power Electronics including HF Phenomena
	[return to parent folder]

	Analysis of EMI Filter Attenuation under the Influence of Parasitic Elements of Components and their Mutual Couplings By Mohammad ALI	[View] [Download]
Abstract: Attenuation of EMI filters strongly depends on the mutual couplings among filter components and their parasitics. This paper explains and analyzes such effects of filter components. Analytical, numerical, and experimental methods are used in a systematic way, considering single- and three-phase EMI filters as examples. It is shown that several paths of couplings and parasitics reduce the filter performance significantly. A separate discussion of the impact on differential- and common-mode behavior is shown in detail, showing further potential in the methods for filter improvement.

	Comparison of Common-Mode EMI Noise in a Phase-Shifted and Hard-Switched Full-Bridge Forward Converters By Ishtiyaq Ahmed MAKDA	[View] [Download]
Abstract: This paper presents the comparison of the common-mode (CM) noise in widely-used phase-shifted (PSFC) and hard-switched (HSFC) full-bridge forward converters. The CM noise voltages across the interleaved transformers' coupling capacitances - one of the significant parasitic coupling capacitances in the isolated converters - are analyzed for both types of switching schemes. Experimental prototypes are built for both switching techniques to verify the CM noise models and their analyses. In contrast to the state-of-the-art belief, the comparison reveals that PSFC generates far more CM noise than its counterpart for the same operating parameters.

	Design Methodology for Dimensioning EMI Filters for Traction Drives with SiC Inverters By Hedieh MOVAGHARNEJAD	[View] [Download]
Abstract: This paper presents a straightforward design methodology for dimensioning EMI filters with consideration of CISPR 25 standard EMI borderlines. In this paper, the influence of switching frequency on dimensioning of EMI filters has been studied, and the results demonstrate that the use of 2-stage EMI filters offers higher power density. Besides, a design approach is proposed for the common-mode (CM) choke design, which results in the optimal selection of CM chokes and avoids over dimensioning.

	Reduction of Common Mode EMI Emissions by Optimizing the Planar Transformer of Phase-Shifted Full-Bridge DC/DC Converters By Achim VEDDE	[View] [Download]
Abstract: An increasing number of isolated converters are designed with planar transformers to reduce the size of the converters. These highly integrated transformers usually have flat windings with a large surface which results in high parasitic capacitances in the transformers. One of the main common mode EMI paths in isolated DC/DC converters are the inter-winding capacitances of transformers. This paper focuses on an optimized design of planar transformers for the reduction of EMI emissions to decrease the filter effort. Therefore, different transformer structures are investigated and an optimized setup with a minimized inter-winding capacitance is analyzed and built up in a prototype. The proposed optimized design is verified by simulations and measurements.