Nov 2026· IEEE transactions on power electronics· Vol 41, pp. 19663-19677· 0 citations· 39 references
Abstract
This article proposes an isolated ultra-flat DC–DC converter architecture capable of directly converting high-voltage distribution rails (15–150 V) into regulated sub-1 V outputs with extremely high voltage conversion ratio. The solution is based on a resonant single-transformer structure specifically designed to enable large step-down operation while minimizing conduction path complexity. A 12:1 turns ratio with a single-turn secondary and reduced primary turns allows high gain realization using only one magnetic component and a minimized number of series devices along the main current path. The complete hardware implementation achieves a total height of 3.5 mm, making it compatible with surface power delivery and direct-to-chip integration constraints. An improved version incorporating a secondary-side active clamp is introduced to enhance controllability and transient behavior without increasing magnetic complexity. Both implementations are experimentally validated and quantitatively compared under equivalent operating conditions. The results demonstrate the feasibility of achieving extreme gain, wide gain variation, and ultra-low-profile integration using a single-magnetic isolated architecture suitable for future high-performance computing and AI processors.
This paper presents a high-gain non-isolated single-input dual-output (SIDO) DC–DC converter based on a quadratic boost architecture for fuel cell electric vehicle (FCEV) applications. The converter is designed to interface a low-voltage proton exchange membrane fuel cell (PEMFC) with two simultaneous loads: a high-voltage traction bus and a low-voltage auxiliary rail. Unlike conventional multi-output topologies that rely on transformers or coupled inductors, the proposed structure achieves significant voltage gain at moderate duty ratios using only two switches, four diodes, and three inductors in a common-ground configuration. Magnetic coupling is eliminated while continuous input current with reduced ripple is maintained, which is a critical requirement for PEMFC longevity. Comprehensive steady-state analysis, parasitic evaluation, component stress derivation, and dual-loop proportional–integral (PI) control design are presented to characterize and regulate both output ports independently. The converter is validated through MATLAB/Simulink simulation and a 120 W experimental prototype operating at 12 V input, 48 V and 6 V dual outputs, and 50 kHz switching frequency. Results confirm stable closed-loop regulation, strong inter-port decoupling, fast dynamic recovery under step load and input voltage disturbances, and a peak efficiency of 94%, demonstrating the practical suitability of the proposed converter for high-gain multi-output DC–DC conversion in FCEV powertrains.
Rajat Singh, R. K. Tripathi, Raveendhra Dogga· Engineering Research Express· 0 citations
Power electronics converters that are high-performance and efficient are essential to the production of power from renewable sources. Nevertheless, low-voltage generation poses a serious challenge for electric vehicle applications utilizing renewable power sources like solar, fuel cells, etc. For this reason, high-gain (HG) DC-DC converters with low duty cycle variation are seen to be crucial for the use of EVs powered by renewable energy. This research presents a novel HG converter using the switched-inductor and voltage lifting approach. The suggested circuit uses a single switch to achieve an impressive voltage gain of approximately 8 times at 60% duty ratio while putting minimal voltage stress on the components. In both continuous and discontinuous conduction modes, the suggested circuits steady-state analysis is described. A design approach with an emphasis on components is examined, and it is compared extensively with state-of-the-art topologies. The performance of the proposed high-gain DC-DC converter with the nonlinear gain compensated PI voltage control (NGC-PI) based control strategy is evaluated under various operating conditions. A prototype of a 200W converter is tested in the lab with an input voltage of 24 V DC. The real-time performance and efficacy of the proposed converter are in line with analytical assumptions. The proposed converter achieves a peak analytical efficiency of 94.46%, while the experimentally measured efficiency remains in the range of 93-95% under different load and power conditions.
Madhav Kumar, K. Panda, Ritula Thakur et al.· IEEE Access· 0 citations
This paper introduces a novel four-port, non-isolated, multi-input single-output (MISO) DC-DC converter designed explicitly for integrating renewable energy. The proposed topology greatly enhances traditional multi-port converters by allowing two renewable sources and a bidirectional energy storage unit to connect simultaneously within a compact, integrated design. Its main advantages include a simplified circuit that reduces complexity and features common-grounded two-input ports for improved system compatibility. It achieves high voltage gain and continuous input current without requiring auxiliary voltage-boosting cells or complex magnetic structures. Additionally, it has a dedicated bidirectional port that enables efficient charging and discharging, thereby improving system resilience. A simple switching strategy ensures seamless transitions between operational modes. A comparative analysis shows that the proposed converter effectively addresses the main limitations of existing multi-port converter (MPC) topologies, including excessive voltage stress, high input current ripple, and control complexity. Included are detailed theoretical analysis and circuit modeling to demonstrate the new structure’s superior performance and reliability. Additionally, the small-signal model for each operating mode is developed to build the converter control system. Decoupling networks are used to establish independent closed-loop controllers due to interactions among converter control loops. To validate the feasibility and effectiveness of the proposed MPC, an experimental prototype with a nominal power of 150 W has been built. The findings emphasize the converter’s substantial potential for use in hybrid energy systems, establishing a new benchmark for high-efficiency, multi-port DC-DC conversion in energy platforms.
A. Dastgiri, M. Hosseinpour, Sepide Yazdi et al.· IEEE Access· 0 citations
By integrating a three-winding coupled inductor (TWCI) with voltage multiplier cells, this study proposes a quadratic DC-DC converter that achieves ultra-high voltage gain while maintaining continuous input current and a common ground. The proposed coupled-inductor topology is specifically engineered to minimize both voltage and current stresses across all circuit components, thereby enhancing overall performance and enabling potential cost reductions. Enhanced design flexibility is a key feature of the proposed configuration, particularly because the secondary winding of the TWCI operates in a semi-trans-inverse manner, allowing high voltage gains to be realized even with a very low turns ratio. Regenerative passive clamp circuits are incorporated to recover the leakage energy of the TWCI and to limit voltage stresses on the active switches, which are driven with simultaneous switching patterns. The converter's vertical structure further alleviates semiconductor voltage stress, while intrinsic current sharing between the TWCI and the input inductor substantially reduces power dissipation in the main power components. Additionally, turn-off switching losses of both active switches are minimized via a quasi-resonant cell. The paper presents a comprehensive steady-state analysis, detailed power loss evaluation, a comparative study with existing topologies, and key design guidelines. All theoretical contributions are conclusively validated through experimental results obtained from a 200 W hardware prototype, converting a 25 V input to a 400 V output.
Mohammed Jawad Kadhim, M. Moazzami, G. Shahgholian et al.· Scientific Reports· 0 citations
A DC–DC power conversion topology based on a single controlled switch and high voltage elevation is developed, employing magnetic energy transfer and an integrated passive clamp to mitigate the voltage stress on the MOSFET. Operating at a duty cycle of 41.7%, the converter achieves an output–input voltage ratio of 16.67, stepping up from 24 V to 400 V. The proposed topology overcomes key limitations of conventional converters, including high losses at large duty cycles and excessive component counts in cascaded architectures. Comprehensive steady-state operation, voltage and current stress evaluation, power loss assessment, and passive component design are analytically investigated. Comparative evaluation with existing high step-up topologies and simulation validation are also presented. Simulation results under a 300 W output power condition demonstrate a peak efficiency of 95.44% and low output voltage ripple. The outcomes support the analytical framework and indicate the suitability of the proposed converter for real-world applications requiring stable high-voltage DC conversion from low-voltage sources.
Thai Anh Au Tran, Xuan Khanh Ho, Hoai Khanh Ly Le· E3S Web of Conferences· 0 citations
This article introduces a novel ultra-high voltage gain DC-DC converter with a low component count, designed for renewable energy applications. In the presented topology, a three-winding coupled-inductor (TWCI) and a switched-capacitor network are embedded within a classic quadratic boost converter. This arrangement yields high voltage gain, ensures continuous low-ripple input current, and preserves a common ground between the source and the load. Due to its trans-inverse feature, the circuit achieves ultra-high voltage gain even with a very low turns ratio in the TWCI. The topology also features current sharing between the TWCI and the main power switch, which significantly reduces power losses in the main power switch and coupled-inductor device. To limit voltage stresses on the active switches, the circuit integrates two passive regenerative clamp circuits, with the switches themselves operated using simultaneous switching patterns. The paper provides detailed steady-state analysis, power loss calculations, comparative evaluation, and design considerations. Finally, a laboratory prototype rated at 200 W has been implemented to verify the theoretical analysis, achieving a very high voltage conversion from 20 V input to 400 V output.
S. Hasanpour· Scientific Reports· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
