EPE Association: EPE 2023 - LS7b: EMI/EMC in Power Electronics, including HF Phenomena

EPE 2023 - LS7b: EMI/EMC in Power Electronics, including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 03: Measurement and Control > EPE 2023 - LS7b: EMI/EMC in Power Electronics, including HF Phenomena

   [return to parent folder]

   Analysis of Passive and Active EMI Filters for On-Board Chargers in Electric Vehicles
By Patrick KÖRNER, Philip BROCKERHOFF, Felix MÜLLER [View]
[Download]

Abstract: The usage of Wide-bandgap semiconductors with high switching frequencies to shrink the size of passive components, leads to the need for large Passive EMI Filters (PEFs) to comply with Electromagnetic Interference (EMI) standards. This paper analyzes the generation of conducted EMI on the example of an 11kW On-Board Charger (OBC). The distinction between Common Mode (CM) and Differential Mode (DM) EMI is highlighted. An Active EMI Filter (AEF) for CM EMI attenuation is developed with the target to decrease the size of bulky Common Mode Chokes (CMCs) of a typically used PEF. From the structure of the PEF, the corresponding equivalent circuit diagrams for CM and DM EMI are used to implement the AEF with the least possible effort, into an already existing EMI Filter. Within this paper, it is outlined why a Voltage Sense Current Inject (VSCI) Feedback (FB)-type AEF fits best for this use case. The PEF and AEF are compared on the basis of the achievable CM and DM Insertion Loss (IL). Simulation results show that the AEF is able to increase the CM IL by 28 dB at 150 kHz and 21 dB at 1MHz.

   Clean Switching of SiC MOSFET Half-Bridge Module with Soft-Ferrite Dual Cores
By Pham Ha Trieu TO, Hans-Günter ECKEL [View]
[Download]

Abstract: The paper shows the ability to use soft-ferrite cores to achieve the clean switching of the high power SiC MOSFET's module. Even though they add more stray inductance to the commutation loop, but with the careful selection of the core material and dimensions, the drawback can be ignored. The cores also benefit the turn-on and reverse-recovery losses, softer the reverse-recovery effect, which can be considered as a complement for the turn-off overvoltage.

   EMI Reduction in a GaN-Based Interleaved Buck Converter through Spread Spectrum Frequency Modulation
By Emmanuel STOK, Marald OTTEN, Henk HUISMAN, Yusuf KÖSESOY [View]
[Download]

Abstract: Spread spectrum frequency modulation is applied in a high-frequency DC/DC power converter to reduce conducted EMI. A new modulation biasing technique is developed to further reduce EMI levels in converters equipped with hardware filters. In the lab, this biasing shows effective shaping of the EMI spectrum.

EPE 2023 - LS7b: EMI/EMC in Power Electronics, including HF Phenomena
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 03: Measurement and Control > EPE 2023 - LS7b: EMI/EMC in Power Electronics, including HF Phenomena
	[return to parent folder]

	Analysis of Passive and Active EMI Filters for On-Board Chargers in Electric Vehicles By Patrick KÖRNER, Philip BROCKERHOFF, Felix MÜLLER	[View] [Download]
Abstract: The usage of Wide-bandgap semiconductors with high switching frequencies to shrink the size of passive components, leads to the need for large Passive EMI Filters (PEFs) to comply with Electromagnetic Interference (EMI) standards. This paper analyzes the generation of conducted EMI on the example of an 11kW On-Board Charger (OBC). The distinction between Common Mode (CM) and Differential Mode (DM) EMI is highlighted. An Active EMI Filter (AEF) for CM EMI attenuation is developed with the target to decrease the size of bulky Common Mode Chokes (CMCs) of a typically used PEF. From the structure of the PEF, the corresponding equivalent circuit diagrams for CM and DM EMI are used to implement the AEF with the least possible effort, into an already existing EMI Filter. Within this paper, it is outlined why a Voltage Sense Current Inject (VSCI) Feedback (FB)-type AEF fits best for this use case. The PEF and AEF are compared on the basis of the achievable CM and DM Insertion Loss (IL). Simulation results show that the AEF is able to increase the CM IL by 28 dB at 150 kHz and 21 dB at 1MHz.

	Clean Switching of SiC MOSFET Half-Bridge Module with Soft-Ferrite Dual Cores By Pham Ha Trieu TO, Hans-Günter ECKEL	[View] [Download]
Abstract: The paper shows the ability to use soft-ferrite cores to achieve the clean switching of the high power SiC MOSFET's module. Even though they add more stray inductance to the commutation loop, but with the careful selection of the core material and dimensions, the drawback can be ignored. The cores also benefit the turn-on and reverse-recovery losses, softer the reverse-recovery effect, which can be considered as a complement for the turn-off overvoltage.

	EMI Reduction in a GaN-Based Interleaved Buck Converter through Spread Spectrum Frequency Modulation By Emmanuel STOK, Marald OTTEN, Henk HUISMAN, Yusuf KÖSESOY	[View] [Download]
Abstract: Spread spectrum frequency modulation is applied in a high-frequency DC/DC power converter to reduce conducted EMI. A new modulation biasing technique is developed to further reduce EMI levels in converters equipped with hardware filters. In the lab, this biasing shows effective shaping of the EMI spectrum.