EPE Association: EPE 2022 - LS1b: Passive Components

EPE 2022 - LS1b: Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 01: Devices, Packaging and System Integration > EPE 2022 - LS1b: Passive Components

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   A high-performance EMI filter based on laminated ferrite ring cores
By Marcin KACKI [View]
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Abstract: This paper presents a study on the flux distribution and impedance of common-mode chokes based on the solid and laminated ferrite ring cores. The analysis demonstrates the novel laminated core structure to improve the flux distribution across the core cross-section at high frequency, and so, also improves the overall EMI filter performance. Solid and laminated ferrite common-mode chokes are implemented in a two-stage single-phase EMI filter and compared experimentally.

   Design and Potential of EMI CM Chokes with Integrated DM Inductance
By Mohammad ALI [View]
[Download]

Abstract: A common-mode (CM) choke is one of the major filtering components used in electromagnetic interference (EMI) filters that impede the flow of common-mode current in the system. Besides, a common-mode choke also offers a finite differential-mode (DM) inductance in the form of leakage inductance. In general, the leakage inductance is small, which necessitates extra DM inductors and leads to a large filter size. In this paper, a single-phase CM choke is designed with an integrated DM inductance for use in EMI filters, based on a flux bypass inside the toroidal core. The DM inductance of these chokes can be altered by redesigning the windings, while the CM inductance remains identical to a conventional CM choke. The design and effectiveness of them are further supported by theoretical, simulated, and measurement results and core saturation analysis. Finally, anextension to three-phase CM chokes with integrated three-phase DM inductance is discussed.

   Investigation of core-loss mechanisms in large-scale ferrite cores for high-frequency applications
By Michael BAUMANN [View]
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Abstract: In this paper, core-loss mechanisms in ferrite cores are investigated. It is demonstrated that ferritematerials showing almost identical core-losses in the datasheets exhibit a completely different lossbehavior when cores with large cross-sections are manufactured. Therefore, there is a high risk that the wrong ferrite material is selected in the design process of a magnetic component for power electronic applications when only the losses from the datasheets are considered. Consequently, a model is developed which leads to a better understanding of the origin losses in ferrite cores and can be used as powerful tool to design and optimize magnetic components for high-frequency applications.With this model, formulas are derived which allow the calculation of two additional loss contributionswhich are the electrical polarization losses and the volume eddy current losses. In a detailedexperimental study of various ferrite core shapes and sizes the model is verified and clearly shows that for example at 100kHz with a magnetic cross-section of 500mm², the additional losses cannot beneglected. The dependencies and input parameters are discussed in detail. Finally, a FEM-basedworkflow is presented and verified by calorimetric measurements. In the future, this workflow can beused to precisely predict the losses of virtual prototypes in a development process i.e., for automotiveapplications.

EPE 2022 - LS1b: Passive Components
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 01: Devices, Packaging and System Integration > EPE 2022 - LS1b: Passive Components
	[return to parent folder]

	A high-performance EMI filter based on laminated ferrite ring cores By Marcin KACKI	[View] [Download]
Abstract: This paper presents a study on the flux distribution and impedance of common-mode chokes based on the solid and laminated ferrite ring cores. The analysis demonstrates the novel laminated core structure to improve the flux distribution across the core cross-section at high frequency, and so, also improves the overall EMI filter performance. Solid and laminated ferrite common-mode chokes are implemented in a two-stage single-phase EMI filter and compared experimentally.

	Design and Potential of EMI CM Chokes with Integrated DM Inductance By Mohammad ALI	[View] [Download]
Abstract: A common-mode (CM) choke is one of the major filtering components used in electromagnetic interference (EMI) filters that impede the flow of common-mode current in the system. Besides, a common-mode choke also offers a finite differential-mode (DM) inductance in the form of leakage inductance. In general, the leakage inductance is small, which necessitates extra DM inductors and leads to a large filter size. In this paper, a single-phase CM choke is designed with an integrated DM inductance for use in EMI filters, based on a flux bypass inside the toroidal core. The DM inductance of these chokes can be altered by redesigning the windings, while the CM inductance remains identical to a conventional CM choke. The design and effectiveness of them are further supported by theoretical, simulated, and measurement results and core saturation analysis. Finally, anextension to three-phase CM chokes with integrated three-phase DM inductance is discussed.

	Investigation of core-loss mechanisms in large-scale ferrite cores for high-frequency applications By Michael BAUMANN	[View] [Download]
Abstract: In this paper, core-loss mechanisms in ferrite cores are investigated. It is demonstrated that ferritematerials showing almost identical core-losses in the datasheets exhibit a completely different lossbehavior when cores with large cross-sections are manufactured. Therefore, there is a high risk that the wrong ferrite material is selected in the design process of a magnetic component for power electronic applications when only the losses from the datasheets are considered. Consequently, a model is developed which leads to a better understanding of the origin losses in ferrite cores and can be used as powerful tool to design and optimize magnetic components for high-frequency applications.With this model, formulas are derived which allow the calculation of two additional loss contributionswhich are the electrical polarization losses and the volume eddy current losses. In a detailedexperimental study of various ferrite core shapes and sizes the model is verified and clearly shows that for example at 100kHz with a magnetic cross-section of 500mm², the additional losses cannot beneglected. The dependencies and input parameters are discussed in detail. Finally, a FEM-basedworkflow is presented and verified by calorimetric measurements. In the future, this workflow can beused to precisely predict the losses of virtual prototypes in a development process i.e., for automotiveapplications.