A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications
Fuel cells (FCs) offer several operational advantages when integrated as a power source in electric vehicles (EVs). Since the voltage of these cells is typically low, usually less than 1 V, the power conversion system requires a DC–DC converter capable of providing a high voltage conversion ratio to...
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MDPI AG
2025-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/1/146 |
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| author | Ahmed Darwish George A. Aggidis |
| author_facet | Ahmed Darwish George A. Aggidis |
| author_sort | Ahmed Darwish |
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| description | Fuel cells (FCs) offer several operational advantages when integrated as a power source in electric vehicles (EVs). Since the voltage of these cells is typically low, usually less than 1 V, the power conversion system requires a DC–DC converter capable of providing a high voltage conversion ratio to match the input voltage of the motor propulsion system, which can exceed 400 V and reach up to 800 V. The modular DC–DC boost converter proposed in this paper is designed to achieve a high voltage step-up ratio for the input FC voltages through the use of isolated series-connecting boosting submodules connected. The power electronic topology employed in the submodules (SMs) is designed to provide a flexible output voltage while maintaining a continuous input current from the fuel cells with minimal current ripple to improve the FC’s performance. The proposed step-up modular converter provides several benefits including scalability, better controllability, and improved reliability, especially in the presence of partial faults. Computer simulations using MATLAB/SIMULINK<sup>®</sup> software (R2024a) have been used to study the feasibility of the proposed converter when connected to a permanent magnet synchronous motor (PMSM). Also, experimental results using a 1 kW prototype composed of four SMs have been obtained to validate the performance of the proposed converter. |
| format | Article |
| id | doaj-art-88d4188959554427a7c3f75275271fd2 |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-88d4188959554427a7c3f75275271fd22025-01-10T13:17:14ZengMDPI AGEnergies1996-10732025-01-0118114610.3390/en18010146A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle ApplicationsAhmed Darwish0George A. Aggidis1School of Engineering, Lancaster University, Lancaster LA1 4YW, UKSchool of Engineering, Lancaster University, Lancaster LA1 4YW, UKFuel cells (FCs) offer several operational advantages when integrated as a power source in electric vehicles (EVs). Since the voltage of these cells is typically low, usually less than 1 V, the power conversion system requires a DC–DC converter capable of providing a high voltage conversion ratio to match the input voltage of the motor propulsion system, which can exceed 400 V and reach up to 800 V. The modular DC–DC boost converter proposed in this paper is designed to achieve a high voltage step-up ratio for the input FC voltages through the use of isolated series-connecting boosting submodules connected. The power electronic topology employed in the submodules (SMs) is designed to provide a flexible output voltage while maintaining a continuous input current from the fuel cells with minimal current ripple to improve the FC’s performance. The proposed step-up modular converter provides several benefits including scalability, better controllability, and improved reliability, especially in the presence of partial faults. Computer simulations using MATLAB/SIMULINK<sup>®</sup> software (R2024a) have been used to study the feasibility of the proposed converter when connected to a permanent magnet synchronous motor (PMSM). Also, experimental results using a 1 kW prototype composed of four SMs have been obtained to validate the performance of the proposed converter.https://www.mdpi.com/1996-1073/18/1/146fuel cell electric vehicle (FCEV)multilevel convertersbidirectional convertersisolated DC–DC converter |
| spellingShingle | Ahmed Darwish George A. Aggidis A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications Energies fuel cell electric vehicle (FCEV) multilevel converters bidirectional converters isolated DC–DC converter |
| title | A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications |
| title_full | A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications |
| title_fullStr | A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications |
| title_full_unstemmed | A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications |
| title_short | A Modular Step-Up DC–DC Converter Based on Dual-Isolated SEPIC/Cuk for Electric Vehicle Applications |
| title_sort | modular step up dc dc converter based on dual isolated sepic cuk for electric vehicle applications |
| topic | fuel cell electric vehicle (FCEV) multilevel converters bidirectional converters isolated DC–DC converter |
| url | https://www.mdpi.com/1996-1073/18/1/146 |
| work_keys_str_mv | AT ahmeddarwish amodularstepupdcdcconverterbasedondualisolatedsepiccukforelectricvehicleapplications AT georgeaaggidis amodularstepupdcdcconverterbasedondualisolatedsepiccukforelectricvehicleapplications AT ahmeddarwish modularstepupdcdcconverterbasedondualisolatedsepiccukforelectricvehicleapplications AT georgeaaggidis modularstepupdcdcconverterbasedondualisolatedsepiccukforelectricvehicleapplications |