EPE Association: EPE 2025 - LS3a: DC/DC Converter Topologies

EPE 2025 - LS3a: DC/DC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS3a: DC/DC Converter Topologies

   [return to parent folder]

   Analysis of Leg-Open Fault of Three Phase Delta-Delta LLC Resonant Converter
By HyunJin JIN, Jihun SO, Yoo-Seop KIM, Yeong-Jun CHOI [View]
[Download]

Abstract: Highly reliable LLC resonant converters operating even under fault conditions are important in aerospace, data center, and electrolyzer applications that require continuous and stable power supply. Therefore, analyzing the operating characteristics and researching methods for maintaining output voltage is essential. Thus, this paper analyzes the operation mode and resonant characteristics of a three-phase delta-delta LLC resonant converter after faults, focusing on open-circuit faults. Based on the analysis, equivalent circuits and voltage gain curves after the faults are derived and compared with those before the faults. The decreased output voltage due to the faults are recovered through PFM(Pulse Frequency Modulation). Consequently, the output voltage is recovered without additional components, and it is intuitively interpreted that the operating frequency is adjusted to achieve voltage gain as the resonant frequency changes after the faults. The analysis results are verified by PLECS simulation.

   Comparative Soft Switching Analysis of Star-Star and Star-Delta Connected Transformer Three-Phase Dual Active Bridge DC-DC Converter
By Cevher Sami BIRSIN, Erdem AKBOY [View]
[Download]

Abstract: This article discusses the soft switching performance of three-phase DAB converters with star-starand star-delta transformers. It explores how different transformer combinations can maintain soft switching under high voltage differences and light loads, supported by theoretical models and PSIM simulations

   Dual Coupled Inductor-Based Current-Fed Dual Active Bridge Converter
By Armin MIREMAD, Suzan EREN [View]
[Download]

Abstract: This paper presents a dual coupled inductor current-fed DAB converter. The introduction of the CIs enhances power transfer capability, reduces the input current ripple and filter size, increases the voltage gain, and expands ZVS the region through proper circuit design. Experimental results are provided to validate the theoretical analysis and performance of the proposed converter.

EPE 2025 - LS3a: DC/DC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS3a: DC/DC Converter Topologies
	[return to parent folder]

	Analysis of Leg-Open Fault of Three Phase Delta-Delta LLC Resonant Converter By HyunJin JIN, Jihun SO, Yoo-Seop KIM, Yeong-Jun CHOI	[View] [Download]
Abstract: Highly reliable LLC resonant converters operating even under fault conditions are important in aerospace, data center, and electrolyzer applications that require continuous and stable power supply. Therefore, analyzing the operating characteristics and researching methods for maintaining output voltage is essential. Thus, this paper analyzes the operation mode and resonant characteristics of a three-phase delta-delta LLC resonant converter after faults, focusing on open-circuit faults. Based on the analysis, equivalent circuits and voltage gain curves after the faults are derived and compared with those before the faults. The decreased output voltage due to the faults are recovered through PFM(Pulse Frequency Modulation). Consequently, the output voltage is recovered without additional components, and it is intuitively interpreted that the operating frequency is adjusted to achieve voltage gain as the resonant frequency changes after the faults. The analysis results are verified by PLECS simulation.

	Comparative Soft Switching Analysis of Star-Star and Star-Delta Connected Transformer Three-Phase Dual Active Bridge DC-DC Converter By Cevher Sami BIRSIN, Erdem AKBOY	[View] [Download]
Abstract: This article discusses the soft switching performance of three-phase DAB converters with star-starand star-delta transformers. It explores how different transformer combinations can maintain soft switching under high voltage differences and light loads, supported by theoretical models and PSIM simulations

	Dual Coupled Inductor-Based Current-Fed Dual Active Bridge Converter By Armin MIREMAD, Suzan EREN	[View] [Download]
Abstract: This paper presents a dual coupled inductor current-fed DAB converter. The introduction of the CIs enhances power transfer capability, reduces the input current ripple and filter size, increases the voltage gain, and expands ZVS the region through proper circuit design. Experimental results are provided to validate the theoretical analysis and performance of the proposed converter.