EPE Association: EPE 2025

EPE 2025 - LS4d: EMI
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 10: Converter Modelling, Design and Low-level Control > EPE 2025 - LS4d: EMI

   [return to parent folder]

   Conducted Emission Mitigation for Solid-State Transformer using Modulation and Multiple Configuration Techniques
By Hafte ADHENA, Alan WATSON, Steve GREEDY, Niek MOONEN [View]
[Download]

Abstract: Solid-state transformers have several advantages over conventional 50 Hz transformers. However, thehigh switching speed of power electronic devices generates electromagnetic interference (EMI) that can cause malfunction. Conducted emission mitigation techniques for solid-state transformers using appropriate modulations and configurations in the QSPICE simulator are analysed in time and frequency domains. Common-mode (CM) emission and reactive power can be improved using proper modulation and configuration techniques for single and multiple solid-state transformers. The single-phase shift modulation has the lowest CM emission and the highest reactive power. In contrast, the triple-phase shift modulation demonstrates the highest CM emission and the lowest reactive power among the various modulation strategies. The CM emission of single and multiple solidstate transformers with dV/dt cancellation capability is below the IEC 62041-2020 standard limits.

   Geometry-Based Modeling of EMI of an LCL Filter in an AC-DC-AC Converter with WBG Power Semiconductors
By Lennart JUENEMANN, Anja SCHANO, Mohamed Aziz BEN ROMDHANE, Axel MERTENS [View]
[Download]

Abstract: This paper analyzes a grid-side LCL filter's parasitic behavior and gives its parasitic elements sensitivities. It presents a new model for capacitors, improving the accuracy of parasitic inductance predictions. Sensitivity analyses show that the arrangement greatly influences the filter's performance and electromagnetic behavior, even in the low-frequency range.

   ZVS Analysis and Design of Four-Port CLLC Converters for Automotive Battery Chargers
By Zhen HUANG, Mattia IURICH, Thomas LANGBAUER, Franz VOLLMAIER, Roberto PETRELLA, Michael HARTMANN [View]
[Download]

Abstract: Resonant DC/DC converters in DC transformer (DCX) operating mode emerged to be an optimal solution for isolated DC/DC converters due to its simple circuit structure and soft-switching behavior of the primary and secondary switches. The zero voltage switching (ZVS) condition in a bidirectionalCLLC DCX converter is, however, dependent on dead-time, resonant tank parameters and load current. In this work the ZVS behavior of this structure is fully analyzed. Detailed circuital and closed-form analytical model of the time behavior of the resonant inductor and stray capacitance currents, as well as the drain-source voltage of the power devices, during the dead-time interval is provided, aiming an optimal prediction/selection based on the resonant tank parameters and load current. Validation ofthe proposed analytical calculations is done under the simplifying assumption of constant output capacitance of the power devices during the switching transient. Even under a limited validity ofthe proposed analysis under the considered strong assumption, it anyhow allows to gain further insights on the ZVS operation as a function of main design parameters of the converter by afast analytical approach. A laboratory prototype of a DC/DC converter for on-board charger (OBC) applications with an output power of 11 kW has been constructed and preliminary experimental results are provided.

EPE 2025 - LS4d: EMI
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 10: Converter Modelling, Design and Low-level Control > EPE 2025 - LS4d: EMI
	[return to parent folder]

	Conducted Emission Mitigation for Solid-State Transformer using Modulation and Multiple Configuration Techniques By Hafte ADHENA, Alan WATSON, Steve GREEDY, Niek MOONEN	[View] [Download]
Abstract: Solid-state transformers have several advantages over conventional 50 Hz transformers. However, thehigh switching speed of power electronic devices generates electromagnetic interference (EMI) that can cause malfunction. Conducted emission mitigation techniques for solid-state transformers using appropriate modulations and configurations in the QSPICE simulator are analysed in time and frequency domains. Common-mode (CM) emission and reactive power can be improved using proper modulation and configuration techniques for single and multiple solid-state transformers. The single-phase shift modulation has the lowest CM emission and the highest reactive power. In contrast, the triple-phase shift modulation demonstrates the highest CM emission and the lowest reactive power among the various modulation strategies. The CM emission of single and multiple solidstate transformers with dV/dt cancellation capability is below the IEC 62041-2020 standard limits.

	Geometry-Based Modeling of EMI of an LCL Filter in an AC-DC-AC Converter with WBG Power Semiconductors By Lennart JUENEMANN, Anja SCHANO, Mohamed Aziz BEN ROMDHANE, Axel MERTENS	[View] [Download]
Abstract: This paper analyzes a grid-side LCL filter's parasitic behavior and gives its parasitic elements sensitivities. It presents a new model for capacitors, improving the accuracy of parasitic inductance predictions. Sensitivity analyses show that the arrangement greatly influences the filter's performance and electromagnetic behavior, even in the low-frequency range.

	ZVS Analysis and Design of Four-Port CLLC Converters for Automotive Battery Chargers By Zhen HUANG, Mattia IURICH, Thomas LANGBAUER, Franz VOLLMAIER, Roberto PETRELLA, Michael HARTMANN	[View] [Download]
Abstract: Resonant DC/DC converters in DC transformer (DCX) operating mode emerged to be an optimal solution for isolated DC/DC converters due to its simple circuit structure and soft-switching behavior of the primary and secondary switches. The zero voltage switching (ZVS) condition in a bidirectionalCLLC DCX converter is, however, dependent on dead-time, resonant tank parameters and load current. In this work the ZVS behavior of this structure is fully analyzed. Detailed circuital and closed-form analytical model of the time behavior of the resonant inductor and stray capacitance currents, as well as the drain-source voltage of the power devices, during the dead-time interval is provided, aiming an optimal prediction/selection based on the resonant tank parameters and load current. Validation ofthe proposed analytical calculations is done under the simplifying assumption of constant output capacitance of the power devices during the switching transient. Even under a limited validity ofthe proposed analysis under the considered strong assumption, it anyhow allows to gain further insights on the ZVS operation as a function of main design parameters of the converter by afast analytical approach. A laboratory prototype of a DC/DC converter for on-board charger (OBC) applications with an output power of 11 kW has been constructed and preliminary experimental results are provided.