EPE Association: EPE 2025 - DS2k: DC/DC Converter Topologies

EPE 2025 - DS2k: 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 - DS2k: DC/DC Converter Topologies

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   Advancement of the SI-SIDO Boost-Buck-Boost Converter with Continuous Switching Method for Bipolar LVDC Applications
By Babak ROOHOLAHI, Hans-Guenter ECKEL [View]
[Download]

Abstract: This paper presents the enhanced performance of the single-inductor single-input dual-output boost-buck-boost DC-DC converter with a novel continuous switching method. Building on previous work, this method optimizes performance under varying load and input conditions, enabling higher power applications and greater adaptability for bipolar low voltage DC systems.

   Analysis of a high gain step-up converter 48V/1kV for piezoelectric driving application
By Nassim Rayane BENNACER, Christian MARTIN, Loris PACE [View]
[Download]

Abstract: This paper discusses the design of a high voltage-gain DC-DC converter 48V/1kV, intended to supply numerous drivers for piezo-actuators, with a total output power between 0 and 200W.

   Design Guidelines for a DAB Converter Incorporating a Multilevel Bridge with Quasi-2-Level Operation
By José Andrés AGUILAR CROSTON, Jean-Yves GAUTHIER, Cyril BUTTAY, Maryam SAEEDIFARD, Besar ASLLANI, Piotr DWORAKOWSKI [View]
[Download]

Abstract: The development of medium voltage DC networks requires efficient DC-DC converters. In this context, the Dual Active Bridge (DAB) with quasi-2-level (Q2L) operation is analyzed as a potential candidate. Power transfer equations, conduction losses and zero voltage switching conditions are derived using Fourier series approximations. Operating principles for multilevel converters are also provided. It is determined that 25° is the boundary of the transition time at which 2L design equations remain valid for Q2L operation. Furthermore, Q2L operation demonstrates superior efficiency during medium to high load operation, due to reduced switching losses, provided the transition time is chosen optimally.

   From Space to Industrial Applications: the Latching Current Limiter as Active Current Protection
By Alex MUSETTI, Alessandro SOLDATI, Pablo FERNANDEZ MIAJA, Manuel ARIAS PEREZ DE AZPEITIA [View]
[Download]

Abstract: This paper presents the Industrial Latching Current Limiter, a converter topology for fast fault detection and management and inrush current limiting in industrial power systems. By integrating a bypass transistor and switching elements in a synchronous buck converter configuration, it enhances efficiency supporting continuous operation under overload conditions.

   Isolated step-down DC-DC converter based-on push-pull topology with reduced voltage stress of the primary side transformer windings
By Robert STALA [View]
[Download]

Abstract: This paper presents new results of a push-pull step-down converter with reduced winding voltage stress. The concept of the system, where an input voltage divider and two branches were used to supply the primary windings was demonstrated. This allows to dv/dt between windings reduction and capacitive current decrease. Operation with two switching sequences is proposed and presented, which allow for a lower maximum value of the magnetic flux, or a lower frequency of core remagnetisation. Selection of switching method may be used to optimize the converter. The natural voltage balance of the input divider and the ability to operate the system with two sources were also demonstrated. The results of efficiency and power losses balance are presented, as well as waveforms for the analysed concepts of converter configuration and control, such as current, voltage and magnetic flux

   MMC-Autotransformer : Impact of the Control on the Design and Efficiency
By Johan BOUKHENFOUF, François GRUSON, Shabab SAMIMI, Michael MERLIN, Philippe DELARUE, Philippe LEMOIGNE, Frédéric COLAS, Xavier GUILLAUD [View]
[Download]

Abstract: To increase flexibility and reliability of HVDC links and MTDC, it is likely that DC-DC converter will be employed. This paper specifically focuses on the DC-Auto-transformer. This study investigates its performance in relation to its parameters including: AC voltages, frequency and waveform characteristics. The analysis presented in this paper demonstrates that increasing the AC voltage within the converter reduces losses and minimizes capacitor size requirements. While, increasing the frequency reduces the losses as well as required size of capacitors. Furthermore, the results indicate that adopting a trapezoidal waveform improves both efficiency and capacitor size.

   Single Active Bridge DC/DC Converter as Auxiliary Power Supply for Medium-Voltage Multilevel Converters
By Patrick LENZEN, Martin PFOST [View]
[Download]

Abstract: Modular multilevel converters are used in various applications such as HVDC, STATCOM or PV. A robust auxiliary power supply is essential to ensure full control of each stage at all times, even during failure scenarios. Due to the high voltage between the cell and the external input power, high isolation is required. This paper presents a Single Active Bridge (SAB) auxiliary power supply for MMCs. The proposed design achieves high isolation and is capable of powering more than 100 MMC cells simultaneously. The high stray inductance resulting from the isolation distance can be included in the converter design. The system can handle asymmetric load changes of up to 24\% on a single stage without causing overvoltage conditions. Furthermore, a novel solution is presented to address highly asymmetrical load scenarios.

   Study of a 6-Leg Floating Interleaved Boost Converter with Coupled Inductors for Fuel Cell Heavy-Duty Electric Vehicles
By Niema EL HADDAJI, Abdesslem DJERDIR, Serge PIERFEDERICI, Daniel HISSEL [View]
[Download]

Abstract: The transition to sustainable transportation has positioned hydrogen fuel cells as a key solution for heavy-duty vehicles, offering high efficiency, sustained power output, and rapid refueling capabilities. DC-DC power converters play a crucial role in adapting the fuel cell's output voltage to meet vehicular requirements. This paper compares three converter topologies: the three-phase interleaved boost converter (3-IBC), its coupled-inductor version, and the six-leg floating interleaved boost converter with coupled inductors (FIBCCI-6L). MATLAB/Simulink simulations assess current ripple performance, highlighting trade-offs in efficiency and component size for heavy-duty fuel cell applications.

EPE 2025 - DS2k: 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 - DS2k: DC/DC Converter Topologies
	[return to parent folder]

	Advancement of the SI-SIDO Boost-Buck-Boost Converter with Continuous Switching Method for Bipolar LVDC Applications By Babak ROOHOLAHI, Hans-Guenter ECKEL	[View] [Download]
Abstract: This paper presents the enhanced performance of the single-inductor single-input dual-output boost-buck-boost DC-DC converter with a novel continuous switching method. Building on previous work, this method optimizes performance under varying load and input conditions, enabling higher power applications and greater adaptability for bipolar low voltage DC systems.

	Analysis of a high gain step-up converter 48V/1kV for piezoelectric driving application By Nassim Rayane BENNACER, Christian MARTIN, Loris PACE	[View] [Download]
Abstract: This paper discusses the design of a high voltage-gain DC-DC converter 48V/1kV, intended to supply numerous drivers for piezo-actuators, with a total output power between 0 and 200W.

	Design Guidelines for a DAB Converter Incorporating a Multilevel Bridge with Quasi-2-Level Operation By José Andrés AGUILAR CROSTON, Jean-Yves GAUTHIER, Cyril BUTTAY, Maryam SAEEDIFARD, Besar ASLLANI, Piotr DWORAKOWSKI	[View] [Download]
Abstract: The development of medium voltage DC networks requires efficient DC-DC converters. In this context, the Dual Active Bridge (DAB) with quasi-2-level (Q2L) operation is analyzed as a potential candidate. Power transfer equations, conduction losses and zero voltage switching conditions are derived using Fourier series approximations. Operating principles for multilevel converters are also provided. It is determined that 25° is the boundary of the transition time at which 2L design equations remain valid for Q2L operation. Furthermore, Q2L operation demonstrates superior efficiency during medium to high load operation, due to reduced switching losses, provided the transition time is chosen optimally.

	From Space to Industrial Applications: the Latching Current Limiter as Active Current Protection By Alex MUSETTI, Alessandro SOLDATI, Pablo FERNANDEZ MIAJA, Manuel ARIAS PEREZ DE AZPEITIA	[View] [Download]
Abstract: This paper presents the Industrial Latching Current Limiter, a converter topology for fast fault detection and management and inrush current limiting in industrial power systems. By integrating a bypass transistor and switching elements in a synchronous buck converter configuration, it enhances efficiency supporting continuous operation under overload conditions.

	Isolated step-down DC-DC converter based-on push-pull topology with reduced voltage stress of the primary side transformer windings By Robert STALA	[View] [Download]
Abstract: This paper presents new results of a push-pull step-down converter with reduced winding voltage stress. The concept of the system, where an input voltage divider and two branches were used to supply the primary windings was demonstrated. This allows to dv/dt between windings reduction and capacitive current decrease. Operation with two switching sequences is proposed and presented, which allow for a lower maximum value of the magnetic flux, or a lower frequency of core remagnetisation. Selection of switching method may be used to optimize the converter. The natural voltage balance of the input divider and the ability to operate the system with two sources were also demonstrated. The results of efficiency and power losses balance are presented, as well as waveforms for the analysed concepts of converter configuration and control, such as current, voltage and magnetic flux

	MMC-Autotransformer : Impact of the Control on the Design and Efficiency By Johan BOUKHENFOUF, François GRUSON, Shabab SAMIMI, Michael MERLIN, Philippe DELARUE, Philippe LEMOIGNE, Frédéric COLAS, Xavier GUILLAUD	[View] [Download]
Abstract: To increase flexibility and reliability of HVDC links and MTDC, it is likely that DC-DC converter will be employed. This paper specifically focuses on the DC-Auto-transformer. This study investigates its performance in relation to its parameters including: AC voltages, frequency and waveform characteristics. The analysis presented in this paper demonstrates that increasing the AC voltage within the converter reduces losses and minimizes capacitor size requirements. While, increasing the frequency reduces the losses as well as required size of capacitors. Furthermore, the results indicate that adopting a trapezoidal waveform improves both efficiency and capacitor size.

	Single Active Bridge DC/DC Converter as Auxiliary Power Supply for Medium-Voltage Multilevel Converters By Patrick LENZEN, Martin PFOST	[View] [Download]
Abstract: Modular multilevel converters are used in various applications such as HVDC, STATCOM or PV. A robust auxiliary power supply is essential to ensure full control of each stage at all times, even during failure scenarios. Due to the high voltage between the cell and the external input power, high isolation is required. This paper presents a Single Active Bridge (SAB) auxiliary power supply for MMCs. The proposed design achieves high isolation and is capable of powering more than 100 MMC cells simultaneously. The high stray inductance resulting from the isolation distance can be included in the converter design. The system can handle asymmetric load changes of up to 24\% on a single stage without causing overvoltage conditions. Furthermore, a novel solution is presented to address highly asymmetrical load scenarios.

	Study of a 6-Leg Floating Interleaved Boost Converter with Coupled Inductors for Fuel Cell Heavy-Duty Electric Vehicles By Niema EL HADDAJI, Abdesslem DJERDIR, Serge PIERFEDERICI, Daniel HISSEL	[View] [Download]
Abstract: The transition to sustainable transportation has positioned hydrogen fuel cells as a key solution for heavy-duty vehicles, offering high efficiency, sustained power output, and rapid refueling capabilities. DC-DC power converters play a crucial role in adapting the fuel cell's output voltage to meet vehicular requirements. This paper compares three converter topologies: the three-phase interleaved boost converter (3-IBC), its coupled-inductor version, and the six-leg floating interleaved boost converter with coupled inductors (FIBCCI-6L). MATLAB/Simulink simulations assess current ripple performance, highlighting trade-offs in efficiency and component size for heavy-duty fuel cell applications.