EPE Association: EPE 2025 - LS3d: Design and optimisation

EPE 2025 - LS3d: Design and optimisation
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 - LS3d: Design and optimisation

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   Analysis of optimization techniques applied to the DAB converter
By Samir MUSSA, Rossano SOTORIVA, Mateus ORIGE, Leonardo BENDER, Gierri WALTRICH [View]
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Abstract: This paper compares computational approaches for optimizing DAB converters, focusing on efficiency and loss minimization. Additionally, a comparison between Single Phase Shift (SPS) and Extended Phase Shift (EPS) modulations was performed. The applied optimization techniques applied include Particle Swarm Optimization (PSO), Genetic Algorithm (GA), and Fmincon Global Search, all converging to the same optimal solution, differing only in processing time. A 2 kW prototype, with parameters obtained from the optimization for both EPS and SPS modulations, underwent testing for different voltage gains.

   Influence of the Mission Profile on the Selection of the Leakage Inductance for DAB Converter
By Adriana CAMPOS, Piotr DWORAKOWSKI, Besar ASLLANI, Konstantin VERSHININ [View]
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Abstract: The Solid-State Transformer (SST) is a key technology to support the massive deployment of Renewable Energy Sources (RES) and the electrification of several sectors. The Dual Active Bridge (DAB) is a promising topology to be used in Medium Voltage DC (MVDC) networks. However, depending on the modulation and the voltage ratio range, the DAB can present high reactive power and low efficiency at light loads. The leakage inductance is a key design parameter to optimize the overall converter performance. This paper presents a methodology to choose the leakage inductance for four mission profiles (PV, EV, residential and commercial) based on proposed weighted duration coefficients. The methodology considers a DC voltage variation and the change in reactive power and ZVS zones. The results show that the leakage inductance and the MFT design are different for profiles that operate mostly at low powers, such as EV.

   Limitations of Current-Optimal Dual Active Bridge Modulation Strategies
By Guy L. SCOGGIN, Adrien VOLDOIRE, Lucas PNIAK, Olivier BÉTHOUX [View]
[Download]

Abstract: In this article a frequency domain-based numerical optimization algorithm is developed to calculate multi-variable PWM control strategies for the Dual Active Bridge that optimize the RMS current circulating in the linkage inductor. A novel analysis of the results concludes the presence of an unavoidable zero current switching boundary that exists in the operational domain and separates zones of ZVS and ZCS. This boundary is then analytically derived for use in control strategies. As commutation at zero or non-negative currents can introduce large switching losses, knowledge of this boundary is crucial for Dual Active Bridge converter design.

EPE 2025 - LS3d: Design and optimisation
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 - LS3d: Design and optimisation
	[return to parent folder]

	Analysis of optimization techniques applied to the DAB converter By Samir MUSSA, Rossano SOTORIVA, Mateus ORIGE, Leonardo BENDER, Gierri WALTRICH	[View] [Download]
Abstract: This paper compares computational approaches for optimizing DAB converters, focusing on efficiency and loss minimization. Additionally, a comparison between Single Phase Shift (SPS) and Extended Phase Shift (EPS) modulations was performed. The applied optimization techniques applied include Particle Swarm Optimization (PSO), Genetic Algorithm (GA), and Fmincon Global Search, all converging to the same optimal solution, differing only in processing time. A 2 kW prototype, with parameters obtained from the optimization for both EPS and SPS modulations, underwent testing for different voltage gains.

	Influence of the Mission Profile on the Selection of the Leakage Inductance for DAB Converter By Adriana CAMPOS, Piotr DWORAKOWSKI, Besar ASLLANI, Konstantin VERSHININ	[View] [Download]
Abstract: The Solid-State Transformer (SST) is a key technology to support the massive deployment of Renewable Energy Sources (RES) and the electrification of several sectors. The Dual Active Bridge (DAB) is a promising topology to be used in Medium Voltage DC (MVDC) networks. However, depending on the modulation and the voltage ratio range, the DAB can present high reactive power and low efficiency at light loads. The leakage inductance is a key design parameter to optimize the overall converter performance. This paper presents a methodology to choose the leakage inductance for four mission profiles (PV, EV, residential and commercial) based on proposed weighted duration coefficients. The methodology considers a DC voltage variation and the change in reactive power and ZVS zones. The results show that the leakage inductance and the MFT design are different for profiles that operate mostly at low powers, such as EV.

	Limitations of Current-Optimal Dual Active Bridge Modulation Strategies By Guy L. SCOGGIN, Adrien VOLDOIRE, Lucas PNIAK, Olivier BÉTHOUX	[View] [Download]
Abstract: In this article a frequency domain-based numerical optimization algorithm is developed to calculate multi-variable PWM control strategies for the Dual Active Bridge that optimize the RMS current circulating in the linkage inductor. A novel analysis of the results concludes the presence of an unavoidable zero current switching boundary that exists in the operational domain and separates zones of ZVS and ZCS. This boundary is then analytically derived for use in control strategies. As commutation at zero or non-negative currents can introduce large switching losses, knowledge of this boundary is crucial for Dual Active Bridge converter design.